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32m铁路箱梁C50混凝土配合比研究 [复制链接]

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一、前言â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
随着我国铁路建设的快速发展,箱梁预制生产技术有了很大提高,大跨度、大体积是重点发展之一,另外,设计年限有了很大提高,从60年使用寿命跃升至100年设计使用寿命,混凝土耐久性成为重点。采用高性能混凝土技术是解决客运专线预应力混凝土箱梁结构耐久设计的重要内容。高性能混凝土技术应用试验是客运专线预应力混凝土箱梁试制、试验的关键技术内容之一,是实现结构耐久性设计思想重要组成部分。这就给我们试验工作者提出了严峻考验。如何实现混凝土的耐久性成为混凝土配合比的设计关键。武广客运专线施工中,中铁十九局韶关制梁厂承担218片32m预制混凝土箱梁施工生产任务,该预制混凝土箱梁为武广客运专线设计时速350公里的32m预制后张法施工双线铁路箱梁,科技含量高,施工难度大,箱梁架设工期紧,C50高性能混凝土配合比设计为施工关键点,施工前我们试验人员进行了大量的试验技术储备工作。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
二、混凝土配制原则â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(一)设计依据â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
客运专线箱梁C50预应混凝土的配制依据主要是《客运专线高性能混凝土暂行技术条件》、《客运专线预应混凝土预制梁暂行技术条件》以及试验梁拟采用的主要生产工艺,其技术要求具体体现为:â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
1 水泥、粉煤灰、矿渣粉、砂、石、外加剂和水等原材料的品质要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
2 混凝土胶凝材料用量、矿物掺合料掺量、水胶比、碱含量、氯离子含量以及容重等配合比参数的限值要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
3 混凝土拌合物的性能要求。主要包括体现箱梁制造工艺要求的混凝土坍落度及其经时损失,混凝土的黏聚性和保水性;体现混凝土抗冻要求的含气量;泌水性等。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
4 混凝土力学性能要求。主要为C50混凝土在不同龄期的立方体抗和静力抗压弹性模量要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
5 混凝土的抗裂性要求。应进行混凝土的抗裂性对比试验。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(二)混凝土配制原则â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
    根据《客运专线高性能混凝土暂行技术条件》、《客运专线预应力混凝土暂行技术条件》、原材料品质以及试验梁拟采用的主要工艺,C50预应力混凝土的配制应体现以下主要原则:â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
1 进行原材料的比选复试,确定品质性能符合《客运专线高性能混凝土暂行技术条件》要求的水泥、粉煤灰、矿渣粉、砂、石、外加剂和水用于C50预应力混凝土的试配。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
2
混凝土的配合比参数â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
胶凝材料用量:胶凝材料总量不宜超过500㎏/m3,其最低用量按最不利环境作用等级(H4或L3或D4)设计考虑应不少于360㎏/m3,实际控制值为460~490㎏/m3为宜。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
    矿物掺合料掺量:采用单掺粉煤灰技术或采用矿渣粉与粉煤灰复掺技术时,粉煤灰的掺量均不宜大于30%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
水胶比:按最不利环境作用等级(H4L3D4)设计考虑时应不大于0.36â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
碱含量:采用非碱活性骨料(砂、石)时,混凝土的总碱含量没有要求;采用砂浆棒膨胀率在0.10~0.20%的碱—硅酸反应活性骨料时,由水泥、矿物掺合料、外加剂和水带入混凝土的碱含量之和应不大3.0㎏/m3;采用砂浆棒膨胀率在0.20~0.30%的碱—硅酸反应活性骨料时,由水泥、矿物掺料、外加剂和水带入混凝土的碱含量之和应不大于3.0㎏/m3,且应在混凝土中掺加具有明显抑制效能的矿物掺合料和外加剂;不得采用砂浆棒膨胀率在0.30%以上的碱—硅酸反应活性骨料。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
氯离子含量:由水泥、矿物掺合料、砂、石、外加剂和水带入混凝土的氯离子总量应不超过胶凝材料总量的0.06%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
容重:混凝土的容重应控制地2400~2500㎏/m3。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
3 混凝土的拌合物性能â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
由于采用在预制场内泵车入模浇灌的生产工艺,混凝土的坍落度在入模时要求不得小于120㎜,一般按入模坍落度150-180㎜进行控制为宜。考虑混凝土经时损失、泵压损失、温度损失,因此混凝土的出机温度一般仍按180-200㎜进行控制,30min静置坍落度损失控制一般不超过60㎜,最大不超过80㎜。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
含气量:根据《客运专线预应力混凝土预制梁暂行技术条件》的要求,混凝土应具有F200的抗冻性,因此混凝土应引入微气泡,新拌混凝土的含气量宜控制为2~4%,具体的控制值应根据硬化混凝土的抗冻性试验结果进行确定。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
泌水率;混凝土入模后不得泌水。在配合比试配过程中可按30min的工序间隔进行控制,即将混凝土静置30min后复搅拌测试其泌水率。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
4 混凝土的力学性能â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
立方体抗压强度:实体箱梁28d龄期混凝土的强度不小于50MPa,在配合比设计时,混凝土的28d龄期配制强度应控制不小于58.2MPaâ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
    静力抗压弹性模量:实体箱梁28d龄期混凝土的弹性模量应不小于35GPa,在配合比设计时,混凝土的28d龄期弹性模量应与强度相适宜。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
5
混凝土的抗裂性â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
对混凝土拌合物性能满足要求的试拌配合比进行抗裂性对比试验,选择抗裂性相对较好的混凝土配合比进行耐久性试验。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
6 混凝土的耐久性能â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
电通量:混凝土的56d龄期电通量应不大于1000库仑。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
抗冻性:混凝土的56d龄期抗冻性应不小于F200â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
抗掺性:混凝土的抗渗性应不小P20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
抗碱—骨料反应:采用砂浆膨胀率在0.20~0.30%的碱—硅酸反应活性骨料时,矿物掺合料和外加剂抑制碱—骨料反应有效性的评价应合格。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
三、原材料试验及选定â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
   根据客运专线高性能混凝土暂行技术条件及“客运专线预应力混凝土预制梁暂行技术条件” 所有原材料均按《客运专线高性能混凝土暂行技术条件》规定的试验项目进行复检,并将原材料的性能复检结果与《客运专线高性能混凝土暂行技术条件》的要求进行了列表对比。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(一)水泥â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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水泥性能复检试验结果见表1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(二)矿渣粉â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
矿渣粉采用广东省韶关市昌山建材有限公司S95级矿渣粉â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
矿渣粉性能复检结果见表2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
矿渣粉性能复检试验结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

序号â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

检验项目â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

技术要求â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

复检结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

比表面积,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

350~500â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

428â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

烧失量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤3.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

氧化镁含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤14â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

6.28â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

三氧化硫含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤4.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.33â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

氯离子含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.02â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.001â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

含水率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤1.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

需水量比,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤100â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

95â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

碱含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.26â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

28d活性指数â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥95â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

99â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(三)细骨料â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
采用广东省韶关市小北江水洗中砂。细骨料性能复检试验结果见表3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
细骨料性能复检试验结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

序号â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

检验项目â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

技术要求â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

复检结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

细度模数â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2.9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

堆积密度,㎏/m3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1520â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

表观密度,㎏/m3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2620â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

紧密空隙率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

38â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
坚固性,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

吸水性,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1.2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

含泥量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤2.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.72â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

泥块含量â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

云母含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.08â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

轻物质含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.08â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

11â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

氯离子含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

<0.02â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

未检出â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

12â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

硫化物及硫酸盐含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.05â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

13â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

有机物含量â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

合格â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

合格â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

14â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

碱活性â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

砂浆棒膨胀率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.01â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(四)粗骨料â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
试验结果见表7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
采用广东省韶关市龙归碎石场二级配的碎石复配成5-25mm连续级配碎石,最大公称粒径25石灰岩碎石,粗骨料试验结果见下表4。根据复结果,以方案一复配结果为理想级配。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
碎石复配试验结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

规格种类â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

复配方案(复配比例,%)â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案一â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案二â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案三â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

10-20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

90â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

85â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

80â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5-25â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

15â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

试验项目â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案一â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案二â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案三â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
松散堆积密度,㎏/m3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1540â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1520â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1520â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
紧密空隙率,㎏/m3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

36â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

37â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

37â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

筛孔尺寸,㎜â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

累计筛余百分率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

技术要求â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案一â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案二â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案三â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

31.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

25â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0~5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

26â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

28â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

32â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

16â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

30~70â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

53â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

55â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

57â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

79â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

82â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

80â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

90~100â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

97â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

98â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

98â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

95~100â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

100â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

100â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

100â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
碎石的品质及有害物复检结果见表5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
碎石品质及有害物复检试验结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

序号â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

检验项目â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

技术要求â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

复检结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

压碎指标,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

坚固性,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

吸取水率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.25â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

含泥量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.25â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

泥块含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.25â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

针片状颗粒总含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3.8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

硫化物及硫酸盐含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.04â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

氯离子含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

<0.02â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

未检出â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

活性矿物â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

无碱活性矿物â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(五)水  采用拌合站场区井水。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(六) 减水剂â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
采用上海城诚LEX-9H聚羧酸减水剂。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
外加剂性能复检结果见表6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
掺外加剂混凝土性能复检试验结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

序号â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

检验项目â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

技术要求â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

复检结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

减水率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

29â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

含气量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥4.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

4.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

常压泌水率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

抗压强度比,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3dâ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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162â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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收缩率比,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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硫酸钠含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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碱含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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2.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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细度,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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氯离子含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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0.017â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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原材料复检试验结果评价:所选用的水泥、矿渣粉、砂、石及二种外加剂按规定的试验方法进行检验,其性能和品质试验结果符合《客运专线高性能混凝土暂行技术条件》的相关规定,可以用于C50预应力混凝土的配制。其中,二级配碎石的复配方案一较为适宜。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
四、混凝土拌合物性能试验â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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在进行混凝土拌合物性能试验前,首先进行混凝土配合比设计参数的初选和混凝土总碱含量和氯离子含量的计算,在混凝土有害物质含量达到控制要求的基础上开展混凝土的试拌工作。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(一)â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
用混凝土配合比设计参数的初选â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
胶凝材料总量:根据所选用的水泥、矿物掺合料和骨料等原材料品质以及生产工艺状况,混凝土的胶凝材料总量宜控制在450~490㎏/m3之间,由于是首次试验,为安全及快速起见,本次试验采用的胶凝材料总量取为484㎏/m3,并在试验期间保持这个水平不变。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
矿物掺合料掺量:粉煤灰和矿渣粉的掺量主要考虑混凝土的强度和耐久性要求进行取用。单独掺用粉煤灰时,粉煤灰的掺量取值为25%;复掺粉煤灰和矿渣煤时,其掺量可适当增加,本次试验时复掺比例控制约为30~55%,其中粉煤灰和矿渣粉的复合比例根据混凝土强度要求、拌合物状况和浆体含量时行了适当调整。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
砂率:混凝土的砂率取值与石子粒径、砂子粗细以及胶体用量有关,一般应控制地34~42%之间。石子粒径越小、砂子越粗,砂率应取上限;混凝土泵送施工是时应适当提高砂率。试验时统一砂率为41%。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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用水量:拌合用水量决定混凝土强度的主要因素。拌合用水的数量主要取决于水泥充分水化的要求;另一方面是混凝土和易性的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
外加剂用量:主要根据混凝土拌合物性能要求进行用水调整。见表8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
表8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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试验混凝土配合比,㎏/m3
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从表10和表11的计算结果可知,初步选定的试验配合比中混凝土的氯离子含量在0.012~0.018之间,均未超过预应力混凝土0.06%的规定限值。由于所选用的骨料为非活性骨料,因此对混凝土的总碱含量没有要求,经计算,所选择的试验配合比中混凝土碱含量在2.09~3.44㎏/m3之间,且混凝土的总碱含量与掺合料掺量呈反比关系。因此,从混凝土的氯离子含量计算结果可以判定,所选定的试验配合比混凝土有害物质含量符合要求,均可进行拌合性能试验。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(三) 混凝土拌合物性能试验在标准试验条件下时行。原材料均在试验前24h放入工作室,控制工作室温度为20,湿度大于50%。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
  混凝土采用60L强制式搅拌机拌合。基本投料顺序为:粉料预混30s,然后投入预先搅拌均匀的液态原材料,继续搅拌150sâ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
混凝土拌合物性能试验结果见表12,其中初始坍落度和含气量在混凝土出机后30min内测试,30min坍落度和泌水率在混凝土出机静置30min后经â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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由于粉煤灰和矿渣粉的需水量比均接近100%,因此在保持用水量不变的情况下,改变粉煤灰和矿渣粉的掺量对坍落度的影响较小,所以选择的11个试验配合比的混凝土初始坍落度均在200~220㎜之间,混凝土的30 min坍落度损失最小值为20㎜,最大值为50㎜,均未超过预期的控制范围。从新拌混凝土的含气量测试结果来看,两种引气型减水剂均有较为稳定的引气作用,其中采用LEX9H型外加剂试拌的6个配合比混凝土的平均含气量为2.58%,采用TH2A型外加剂拌的5个配合混凝土的平均含气量为2.86%,均能满足2~4%的控制要求。因此,所选择的11个试验配合比的拌合物均能满足预期的技术要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
五、混凝土抗裂性对比试验â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
混凝土抗裂性对比试验采用抗裂环法进行。将混凝土成型于内模尺寸为Φ305×Φ425×100㎜的模内,24h后拆除外模移入温度为20,湿度为60%的环境中养护观测,定期检查混凝土表面,观察裂缝的宽度,以比较混凝土抗裂性能相对优劣。混凝土抗裂试件经28天观测,11个配合比的混凝土试件侧面均未出现可见裂缝,说明试验混凝土均具有较好的抗裂性。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
六、混凝土力学性能试验â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
   按表9所列试验配合比成型的混凝土试件标准养护各龄期强度和弹性模量试验结果见表12â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
12â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
混凝土强度及弹性模量试验结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

编号â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

抗压强度,MPaâ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

弹性模量,GPaâ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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R1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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R2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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R3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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R7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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R28â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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E2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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E7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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E28â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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X-01â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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44.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

73.7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

67.1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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44.6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

47.6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

X-02â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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42.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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51.6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

65.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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42.3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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46.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

X-03â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

14.7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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31.3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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41.7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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56.7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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68.8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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35.1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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46.6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

X-04â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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15.1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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30.3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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35.8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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45.3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

62.4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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36.1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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46.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

X-05â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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11.1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

31.8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

41.3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

45.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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60.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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36.9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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45.9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

X-06â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

12.7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

28.3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

34.4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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47.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

62.2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

34.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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44.9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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X-07â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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43.7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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52.7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

64.7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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44.9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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47.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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X-08â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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42.7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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54.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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65.4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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44.8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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46.3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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X-09â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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12.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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35.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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41.4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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56.9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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61.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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34.8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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45.6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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X-10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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41.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

52.2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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59.4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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43.1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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45.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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X-11â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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15.3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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39.3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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41.1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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52.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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69.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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35.1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

43.6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
从表12的试验结果可以看出:â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(一)所有试件的28d龄期立方体抗压强度均能满足C50混凝土的配制要求。各配全比混凝土28d龄期立方体抗压强度最大值为69.0MPa,最小值为59.4MPa,均高于配制强度58.0 MPa的要求,具有较好的强度富余系数。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(二)所有试件的28d龄期静力弹性模量均能满足C50混凝土的配制要求。在混凝土单方用水量不变的条件下,混凝土的28d龄期弹性模量随掺合料数量的增加呈现降低的趋势。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(三)试件强度达到《客运专线预应混凝土预制梁暂行技术条件》规定的带模张拉强度(设计强度的50%25MPa)要求的龄期2d左右。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(四)试件强度达到《客运专线预应混凝土预制梁暂行技术条件》规定的初张拉强度(设计强度的80%40MPa)要求的龄期3d左右。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
七、混凝土耐久性能试验â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
客运专线预制箱梁C50预应力混凝土的耐久性能主要为混凝土的电通量、抗冻性、抗渗性和抗碱—骨料反应性。 â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(一)电通量â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
根据《客运专线高性能混凝土暂行技术条件》的要求,一般环境条件下C50混凝土的电通量应不大于1000C;根据《客运专线预应力混凝土预预制梁暂行技术条件》的要求,非氯盐环境条件下混凝土的电通量应大于12000C。综合以上两个技术条件的要求,合宁铁路预制箱梁C50预应力混凝土的56d电通量应不大于1000Câ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
按表9所列试验配合比成型的试件在标准养护条件下的混凝土电通是量结果见表13â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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混凝土电通量试验结果,Câ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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从混凝土的电通量试验结果可知,混凝土均具有较小的电通量测试值,主要是因为混凝土中掺入了一定数量的矿物掺合料并取用了较低的用水量,除编号X-1的配合比混凝土外(电通量为1165C),其它10个试验配合比混凝土的28d龄期电通量均已小于1000C,已经达到了混凝土56d龄期电通量的限值要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
混凝土的电通量具有随龄期增长逐步降低的趋势。对于单掺25%粉煤灰编号为X-7的试验配合比混凝土,由于其28d龄期的混凝土电通量超过1000C,但成型期尚未到56d,因此在成型龄期为42d时对其电通量进行了测试,测试结果表明42d混凝土的电通量已经达到混凝土56d龄期电通量的限值控制要求。因此,所选择的11个试验配合比的混凝土电通量均能满足规定的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(二) 抗冻性â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
根据《客运专线预应力混凝土预制梁暂行技术条件》的要求,混凝土抗冻性试件在冻融循环次数200次后,重量缺损失不应超过5%,相对动弹性模量不应低于60%。根据试验配合比混凝土含气量、矿物掺合料和掺量的具体情况,选择了具有代表性的六个配合比试件进行抗冻性试验,分别编号为X-1X-7的两组单掺约25%的粉煤灰的混凝土试件、编号为X-2X-8的两组复掺约35%粉煤灰和矿渣粉的混凝土试件、编号为X-4X-10的两组复掺约45%粉煤灰和矿渣粉的混凝土试件。六组混凝土试件28d龄期按快速法试验抗冻性结果见表14â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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   混凝土的抗冻性主要与所引入的空气含量、气泡的质量、混凝土强度和水胶比等因素密切相关,按照《客运专线预应力混凝土预制梁暂行技术条件》的要求,新拌混凝土的含气量宜为2~4%,从表9的混凝土配合比可以看出,表15所列六组试件的新拌混凝土含气量均在3%左右,符合《客运专线预应力混凝土预制梁暂行技术条件》的要求。从表15的混凝土抗冻性试验结果可以看出:经过200次快速冻融后,六组试件的失重率均未超过5%,相对动弹性模量均大于60%,说明六组试件均具有200次以上的抗冻性能。从试件经受200次快速冻融后的相对动弹性模量试验结果来看,掺TH2A型外加剂混凝土具有相对较高的残余动弹性模量,说明TH2A型外加剂引入的空气在混凝土内部具有更好的气泡结构。试件抗冻性试验结果也可以看出,在气泡质量有保证的前提下,控制混凝土拌合物含气量和具有200次的抗冻要求具有较好的相关性。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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X-7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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24â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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X-8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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22â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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X-10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

不透水â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

16â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
根据《客运专线预应力混凝土预制梁暂行技术条件》的技术要求,混凝土试件的抗渗等级也应不小于P20。从表16混凝土抗渗性性试验结果可以看出,在水压P20MPa时试件均未发生透水现象,劈开试件的透水高度为16~24mm,说明混凝土具有良好的密实性,混凝土的抗渗等级不小于P20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(四) 抗碱—骨料反应性â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
混凝土的抗碱—骨料反应性主要与砂石料的碱活性、混凝土的总碱含量以及矿物掺合料的品质和数量有关。当骨料为活性时,应根据骨料活性的大小进行混凝土总碱含量的控制和抗碱—骨料反应抑制效能试验。由于本项目采用的河砂和人工碎石经检验为非活性骨料,在鼓励采用低碱原材料(水泥、粉煤灰、矿渣粉、外加剂)的前提下,对混凝土总碱含量可不作限值要求。因此,表9所列试验配合比的混凝土的抗碱—骨料反应性均为合格。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
八、试验结论与配合比建议â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
经过以上试验得出如下结论â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(一)所选择的水泥、粉煤灰、矿渣粉、砂、石和外加剂的性能均符合《客运专线预应力混凝土预制梁暂行技术条件》的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(二) 试验配合比混凝土氯离子含量经计算均满足不大于胶凝材料总量0.06%的规定,试验配合比混凝土氯离子含量合格。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(三)试验配合比混凝土的坍落度、含气量、泌水率等拌和物性能均满足预制梁和高性能混凝土技术条件和施工工艺的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(四)试验配合比混凝土各龄期的强度和弹性摸量均能满足C50混凝土配制要求以及箱梁初张拉和脱模的工艺要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(五) 试验配合比混凝土的电通量均能满足56d龄期不大于1000的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(六) 所选择试验的编号为X-01X-02X-04X-07X-08X-10、的六个配合比混凝土的抗冻性均能满足F200的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(七)所选择试验的编号为X-01X-02X-04X-07X-08X-10、的六个配合比混凝土的抗渗性均能满足P20的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(八)试验配合比混凝土的抗碱—骨料反应性为合格。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
基于以上结论,建议试验梁按表X-04要求进行试制,并根据试验梁混凝土的水化热生温和实体梁硬化混凝土性能测试结果确定箱梁的生产配合比。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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回复:32m铁路箱梁C50混凝土配合比研究

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回复:32m铁路箱梁C50混凝土配合比研究

谢谢 顶一下â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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回复:32m铁路箱梁C50混凝土配合比研究

谢谢!很有参考价值。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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5#

回复: 32m铁路箱梁C50混凝土配合比研究

32m铁路箱梁C50混凝土配合比研究â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
一、前言â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
随着我国铁路建设的快速发展,箱梁预制生产技术有了很大提高,大跨度、大体积是重点发展之一,另外,设计年限有了很大提高,从60年使用寿命跃升至100年设计使用寿命,混凝土耐久性成为重点。采用高性能混凝土技术是解决客运专线预应力混凝土箱梁结构耐久设计的重要内容。高性能混凝土技术应用试验是客运专线预应力混凝土箱梁试制、试验的关键技术内容之一,是实现结构耐久性设计思想重要组成部分。这就给我们试验工作者提出了严峻考验。如何实现混凝土的耐久性成为混凝土配合比的设计关键。武广客运专线施工中,中铁十九局韶关制梁厂承担218片32m预制混凝土箱梁施工生产任务,该预制混凝土箱梁为武广客运专线设计时速350公里的32m预制后张法施工双线铁路箱梁,科技含量高,施工难度大,箱梁架设工期紧,C50高性能混凝土配合比设计为施工关键点,施工前我们试验人员进行了大量的试验技术储备工作。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
二、混凝土配制原则â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(一)设计依据â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
客运专线箱梁C50预应混凝土的配制依据主要是《客运专线高性能混凝土暂行技术条件》、《客运专线预应混凝土预制梁暂行技术条件》以及试验梁拟采用的主要生产工艺,其技术要求具体体现为:â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
1 水泥、粉煤灰、矿渣粉、砂、石、外加剂和水等原材料的品质要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
2 混凝土胶凝材料用量、矿物掺合料掺量、水胶比、碱含量、氯离子含量以及容重等配合比参数的限值要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
3 混凝土拌合物的性能要求。主要包括体现箱梁制造工艺要求的混凝土坍落度及其经时损失,混凝土的黏聚性和保水性;体现混凝土抗冻要求的含气量;泌水性等。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
4 混凝土力学性能要求。主要为C50混凝土在不同龄期的立方体抗和静力抗压弹性模量要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
5 混凝土的抗裂性要求。应进行混凝土的抗裂性对比试验。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(二)混凝土配制原则â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
    根据《客运专线高性能混凝土暂行技术条件》、《客运专线预应力混凝土暂行技术条件》、原材料品质以及试验梁拟采用的主要工艺,C50预应力混凝土的配制应体现以下主要原则:â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
1 进行原材料的比选复试,确定品质性能符合《客运专线高性能混凝土暂行技术条件》要求的水泥、粉煤灰、矿渣粉、砂、石、外加剂和水用于C50预应力混凝土的试配。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
2
混凝土的配合比参数â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
胶凝材料用量:胶凝材料总量不宜超过500㎏/m3,其最低用量按最不利环境作用等级(H4或L3或D4)设计考虑应不少于360㎏/m3,实际控制值为460~490㎏/m3为宜。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
    矿物掺合料掺量:采用单掺粉煤灰技术或采用矿渣粉与粉煤灰复掺技术时,粉煤灰的掺量均不宜大于30%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
水胶比:按最不利环境作用等级(H4L3D4)设计考虑时应不大于0.36â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
碱含量:采用非碱活性骨料(砂、石)时,混凝土的总碱含量没有要求;采用砂浆棒膨胀率在0.10~0.20%的碱—硅酸反应活性骨料时,由水泥、矿物掺合料、外加剂和水带入混凝土的碱含量之和应不大3.0㎏/m3;采用砂浆棒膨胀率在0.20~0.30%的碱—硅酸反应活性骨料时,由水泥、矿物掺料、外加剂和水带入混凝土的碱含量之和应不大于3.0㎏/m3,且应在混凝土中掺加具有明显抑制效能的矿物掺合料和外加剂;不得采用砂浆棒膨胀率在0.30%以上的碱—硅酸反应活性骨料。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
氯离子含量:由水泥、矿物掺合料、砂、石、外加剂和水带入混凝土的氯离子总量应不超过胶凝材料总量的0.06%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
容重:混凝土的容重应控制地2400~2500㎏/m3。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
3 混凝土的拌合物性能â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
由于采用在预制场内泵车入模浇灌的生产工艺,混凝土的坍落度在入模时要求不得小于120㎜,一般按入模坍落度150-180㎜进行控制为宜。考虑混凝土经时损失、泵压损失、温度损失,因此混凝土的出机温度一般仍按180-200㎜进行控制,30min静置坍落度损失控制一般不超过60㎜,最大不超过80㎜。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
含气量:根据《客运专线预应力混凝土预制梁暂行技术条件》的要求,混凝土应具有F200的抗冻性,因此混凝土应引入微气泡,新拌混凝土的含气量宜控制为2~4%,具体的控制值应根据硬化混凝土的抗冻性试验结果进行确定。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
泌水率;混凝土入模后不得泌水。在配合比试配过程中可按30min的工序间隔进行控制,即将混凝土静置30min后复搅拌测试其泌水率。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
4 混凝土的力学性能â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
立方体抗压强度:实体箱梁28d龄期混凝土的强度不小于50MPa,在配合比设计时,混凝土的28d龄期配制强度应控制不小于58.2MPaâ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
    静力抗压弹性模量:实体箱梁28d龄期混凝土的弹性模量应不小于35GPa,在配合比设计时,混凝土的28d龄期弹性模量应与强度相适宜。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
5
混凝土的抗裂性â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
对混凝土拌合物性能满足要求的试拌配合比进行抗裂性对比试验,选择抗裂性相对较好的混凝土配合比进行耐久性试验。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
6 混凝土的耐久性能â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
电通量:混凝土的56d龄期电通量应不大于1000库仑。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
抗冻性:混凝土的56d龄期抗冻性应不小于F200â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
抗掺性:混凝土的抗渗性应不小P20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
抗碱—骨料反应:采用砂浆膨胀率在0.20~0.30%的碱—硅酸反应活性骨料时,矿物掺合料和外加剂抑制碱—骨料反应有效性的评价应合格。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
三、原材料试验及选定â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
  根据客运专线高性能混凝土暂行技术条件及“客运专线预应力混凝土预制梁暂行技术条件” 所有原材料均按《客运专线高性能混凝土暂行技术条件》规定的试验项目进行复检,并将原材料的性能复检结果与《客运专线高性能混凝土暂行技术条件》的要求进行了列表对比。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(一)水泥â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
采用广东省韶关市昌山建材水泥厂粤海牌P.O 42.5水泥。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
水泥性能复检试验结果见表1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
水泥性能复检试验结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

序号â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

检验项目â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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技术要求â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

复检结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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烧失量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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≤5.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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氧化镁含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤5.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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三氧化硫含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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≤3.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2.10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

细度,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤10.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

凝结时间,minâ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

初凝â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥45â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

142â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

终凝â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤600â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

279â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

安定性â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

合格â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

合格â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

强度,MPaâ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3d抗折â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥3.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5.7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

28d抗折â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥6.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

8.3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3d抗压â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥16â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

25.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

28d抗压â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥42.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

48.3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

碱含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.80â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.24â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

氯离子含量â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.06â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.001â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(二)矿渣粉â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
矿渣粉采用广东省韶关市昌山建材有限公司S95级矿渣粉â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
矿渣粉性能复检结果见表2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
矿渣粉性能复检试验结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

序号â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

检验项目â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

技术要求â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

复检结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

比表面积,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

350~500â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

428â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

烧失量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤3.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

氧化镁含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤14â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

6.28â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

三氧化硫含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤4.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.33â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

氯离子含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.02â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.001â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

含水率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤1.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

需水量比,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤100â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

95â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

碱含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.26â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

28d活性指数â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥95â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

99â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(三)细骨料â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
采用广东省韶关市小北江水洗中砂。细骨料性能复检试验结果见表3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
细骨料性能复检试验结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

序号â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

检验项目â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

技术要求â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

复检结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

细度模数â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2.9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

堆积密度,㎏/m3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1520â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

表观密度,㎏/m3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2620â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

紧密空隙率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

38â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
坚固性,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

吸水性,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1.2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

含泥量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤2.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.72â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

泥块含量â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

云母含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.08â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

轻物质含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.08â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

11â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

氯离子含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

<0.02â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

未检出â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

12â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

硫化物及硫酸盐含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.05â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

13â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

有机物含量â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

合格â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

合格â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

14â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

碱活性â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

砂浆棒膨胀率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.01â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(四)粗骨料â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
试验结果见表7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
采用广东省韶关市龙归碎石场二级配的碎石复配成5-25mm连续级配碎石,最大公称粒径25石灰岩碎石,粗骨料试验结果见下表4。根据复结果,以方案一复配结果为理想级配。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
碎石复配试验结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

规格种类â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

复配方案(复配比例,%)â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案一â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案二â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案三â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

10-20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

90â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

85â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

80â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5-25â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

15â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

试验项目â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案一â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案二â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案三â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
松散堆积密度,㎏/m3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1540â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1520â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1520â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
紧密空隙率,㎏/m3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

36â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

37â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

37â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

筛孔尺寸,㎜â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

累计筛余百分率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

技术要求â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案一â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案二â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

方案三â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

31.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

25â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0~5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

26â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

28â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

32â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

16â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

30~70â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

53â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

55â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

57â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

79â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

82â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

80â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

90~100â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

97â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

98â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

98â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

95~100â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

100â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

100â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

100â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
碎石的品质及有害物复检结果见表5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
碎石品质及有害物复检试验结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

序号â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

检验项目â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

技术要求â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

复检结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

压碎指标,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤10â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

坚固性,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

吸取水率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.25â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

含泥量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.25â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

泥块含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.25â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

针片状颗粒总含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3.8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

硫化物及硫酸盐含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.04â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

氯离子含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

<0.02â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

未检出â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

活性矿物â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

无碱活性矿物â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(五)水  采用拌合站场区井水。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(六) 减水剂â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
采用上海城诚LEX-9H聚羧酸减水剂。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
外加剂性能复检结果见表6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
掺外加剂混凝土性能复检试验结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

序号â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

检验项目â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

技术要求â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

复检结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

减水率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

29â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

含气量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥4.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

4.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

常压泌水率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

抗压强度比,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3dâ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥130â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

162â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

7dâ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥12.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

150â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

28dâ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥120â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

132â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

对钢筋锈蚀作用â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

无锈蚀â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

无锈蚀â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

收缩率比,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

112â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

相对耐久性指标,%,200次â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥80â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

85.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

水泥净浆流动度,㎜â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≥240â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

270â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

硫酸钠含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤10.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1.08â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

氯离子含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤0.2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.001â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

碱含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤10.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2.5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(七) 粉煤灰â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
采用广州粉煤灰建材厂恒运牌粉煤灰。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
粉煤灰性能复检结果见表7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
粉煤灰性能复检试验结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

序号â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

检验项目â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

技术要求â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

复检结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

细度,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤12â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

11â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

烧失量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤3.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

2.9â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

3â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

含水率,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤1.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.24â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

4â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

需水量比,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤100â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

96â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

5â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

三氧化硫含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

≤3.0â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.61â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

6â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

碱含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

1.41â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

7â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

氯离子含量,%â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

0.017â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
原材料复检试验结果评价:所选用的水泥、矿渣粉、砂、石及二种外加剂按规定的试验方法进行检验,其性能和品质试验结果符合《客运专线高性能混凝土暂行技术条件》的相关规定,可以用于C50预应力混凝土的配制。其中,二级配碎石的复配方案一较为适宜。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
四、混凝土拌合物性能试验â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
在进行混凝土拌合物性能试验前,首先进行混凝土配合比设计参数的初选和混凝土总碱含量和氯离子含量的计算,在混凝土有害物质含量达到控制要求的基础上开展混凝土的试拌工作。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(一)â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
用混凝土配合比设计参数的初选â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
胶凝材料总量:根据所选用的水泥、矿物掺合料和骨料等原材料品质以及生产工艺状况,混凝土的胶凝材料总量宜控制在450~490㎏/m3之间,由于是首次试验,为安全及快速起见,本次试验采用的胶凝材料总量取为484㎏/m3,并在试验期间保持这个水平不变。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
矿物掺合料掺量:粉煤灰和矿渣粉的掺量主要考虑混凝土的强度和耐久性要求进行取用。单独掺用粉煤灰时,粉煤灰的掺量取值为25%;复掺粉煤灰和矿渣煤时,其掺量可适当增加,本次试验时复掺比例控制约为30~55%,其中粉煤灰和矿渣粉的复合比例根据混凝土强度要求、拌合物状况和浆体含量时行了适当调整。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
砂率:混凝土的砂率取值与石子粒径、砂子粗细以及胶体用量有关,一般应控制地34~42%之间。石子粒径越小、砂子越粗,砂率应取上限;混凝土泵送施工是时应适当提高砂率。试验时统一砂率为41%。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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用水量:拌合用水量决定混凝土强度的主要因素。拌合用水的数量主要取决于水泥充分水化的要求;另一方面是混凝土和易性的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
外加剂用量:主要根据混凝土拌合物性能要求进行用水调整。见表8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
表8â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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试验混凝土配合比,㎏/m3
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从表10和表11的计算结果可知,初步选定的试验配合比中混凝土的氯离子含量在0.012~0.018之间,均未超过预应力混凝土0.06%的规定限值。由于所选用的骨料为非活性骨料,因此对混凝土的总碱含量没有要求,经计算,所选择的试验配合比中混凝土碱含量在2.09~3.44㎏/m3之间,且混凝土的总碱含量与掺合料掺量呈反比关系。因此,从混凝土的氯离子含量计算结果可以判定,所选定的试验配合比混凝土有害物质含量符合要求,均可进行拌合性能试验。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(三) 混凝土拌合物性能试验在标准试验条件下时行。原材料均在试验前24h放入工作室,控制工作室温度为20,湿度大于50%。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
  混凝土采用60L强制式搅拌机拌合。基本投料顺序为:粉料预混30s,然后投入预先搅拌均匀的液态原材料,继续搅拌150sâ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
混凝土拌合物性能试验结果见表12,其中初始坍落度和含气量在混凝土出机后30min内测试,30min坍落度和泌水率在混凝土出机静置30min后经â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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由于粉煤灰和矿渣粉的需水量比均接近100%,因此在保持用水量不变的情况下,改变粉煤灰和矿渣粉的掺量对坍落度的影响较小,所以选择的11个试验配合比的混凝土初始坍落度均在200~220㎜之间,混凝土的30 min坍落度损失最小值为20㎜,最大值为50㎜,均未超过预期的控制范围。从新拌混凝土的含气量测试结果来看,两种引气型减水剂均有较为稳定的引气作用,其中采用LEX9H型外加剂试拌的6个配合比混凝土的平均含气量为2.58%,采用TH2A型外加剂拌的5个配合混凝土的平均含气量为2.86%,均能满足2~4%的控制要求。因此,所选择的11个试验配合比的拌合物均能满足预期的技术要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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混凝土抗裂性对比试验采用抗裂环法进行。将混凝土成型于内模尺寸为Φ305×Φ425×100㎜的模内,24h后拆除外模移入温度为20,湿度为60%的环境中养护观测,定期检查混凝土表面,观察裂缝的宽度,以比较混凝土抗裂性能相对优劣。混凝土抗裂试件经28天观测,11个配合比的混凝土试件侧面均未出现可见裂缝,说明试验混凝土均具有较好的抗裂性。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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从表12的试验结果可以看出:â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(一)所有试件的28d龄期立方体抗压强度均能满足C50混凝土的配制要求。各配全比混凝土28d龄期立方体抗压强度最大值为69.0MPa,最小值为59.4MPa,均高于配制强度58.0 MPa的要求,具有较好的强度富余系数。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(二)所有试件的28d龄期静力弹性模量均能满足C50混凝土的配制要求。在混凝土单方用水量不变的条件下,混凝土的28d龄期弹性模量随掺合料数量的增加呈现降低的趋势。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(三)试件强度达到《客运专线预应混凝土预制梁暂行技术条件》规定的带模张拉强度(设计强度的50%25MPa)要求的龄期2d左右。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(四)试件强度达到《客运专线预应混凝土预制梁暂行技术条件》规定的初张拉强度(设计强度的80%40MPa)要求的龄期3d左右。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
七、混凝土耐久性能试验â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
客运专线预制箱梁C50预应力混凝土的耐久性能主要为混凝土的电通量、抗冻性、抗渗性和抗碱—骨料反应性。 â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(一)电通量â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
根据《客运专线高性能混凝土暂行技术条件》的要求,一般环境条件下C50混凝土的电通量应不大于1000C;根据《客运专线预应力混凝土预预制梁暂行技术条件》的要求,非氯盐环境条件下混凝土的电通量应大于12000C。综合以上两个技术条件的要求,合宁铁路预制箱梁C50预应力混凝土的56d电通量应不大于1000Câ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
按表9所列试验配合比成型的试件在标准养护条件下的混凝土电通是量结果见表13â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
混凝土电通量试验结果,Câ6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

编号â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
从混凝土的电通量试验结果可知,混凝土均具有较小的电通量测试值,主要是因为混凝土中掺入了一定数量的矿物掺合料并取用了较低的用水量,除编号X-1的配合比混凝土外(电通量为1165C),其它10个试验配合比混凝土的28d龄期电通量均已小于1000C,已经达到了混凝土56d龄期电通量的限值要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
混凝土的电通量具有随龄期增长逐步降低的趋势。对于单掺25%粉煤灰编号为X-7的试验配合比混凝土,由于其28d龄期的混凝土电通量超过1000C,但成型期尚未到56d,因此在成型龄期为42d时对其电通量进行了测试,测试结果表明42d混凝土的电通量已经达到混凝土56d龄期电通量的限值控制要求。因此,所选择的11个试验配合比的混凝土电通量均能满足规定的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(二) 抗冻性â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
根据《客运专线预应力混凝土预制梁暂行技术条件》的要求,混凝土抗冻性试件在冻融循环次数200次后,重量缺损失不应超过5%,相对动弹性模量不应低于60%。根据试验配合比混凝土含气量、矿物掺合料和掺量的具体情况,选择了具有代表性的六个配合比试件进行抗冻性试验,分别编号为X-1X-7的两组单掺约25%的粉煤灰的混凝土试件、编号为X-2X-8的两组复掺约35%粉煤灰和矿渣粉的混凝土试件、编号为X-4X-10的两组复掺约45%粉煤灰和矿渣粉的混凝土试件。六组混凝土试件28d龄期按快速法试验抗冻性结果见表14â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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混凝土抗冻性结果â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

编号â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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200次快速冻融â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë

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â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
  混凝土的抗冻性主要与所引入的空气含量、气泡的质量、混凝土强度和水胶比等因素密切相关,按照《客运专线预应力混凝土预制梁暂行技术条件》的要求,新拌混凝土的含气量宜为2~4%,从表9的混凝土配合比可以看出,表15所列六组试件的新拌混凝土含气量均在3%左右,符合《客运专线预应力混凝土预制梁暂行技术条件》的要求。从表15的混凝土抗冻性试验结果可以看出:经过200次快速冻融后,六组试件的失重率均未超过5%,相对动弹性模量均大于60%,说明六组试件均具有200次以上的抗冻性能。从试件经受200次快速冻融后的相对动弹性模量试验结果来看,掺TH2A型外加剂混凝土具有相对较高的残余动弹性模量,说明TH2A型外加剂引入的空气在混凝土内部具有更好的气泡结构。试件抗冻性试验结果也可以看出,在气泡质量有保证的前提下,控制混凝土拌合物含气量和具有200次的抗冻要求具有较好的相关性。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(三)抗渗性â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
按表9所列试验配合比成型的六组试件在标准养护条件下的混凝土抗渗性试验结果见表15â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
15â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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根据《客运专线预应力混凝土预制梁暂行技术条件》的技术要求,混凝土试件的抗渗等级也应不小于P20。从表16混凝土抗渗性性试验结果可以看出,在水压P20MPa时试件均未发生透水现象,劈开试件的透水高度为16~24mm,说明混凝土具有良好的密实性,混凝土的抗渗等级不小于P20â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(四) 抗碱—骨料反应性â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
混凝土的抗碱—骨料反应性主要与砂石料的碱活性、混凝土的总碱含量以及矿物掺合料的品质和数量有关。当骨料为活性时,应根据骨料活性的大小进行混凝土总碱含量的控制和抗碱—骨料反应抑制效能试验。由于本项目采用的河砂和人工碎石经检验为非活性骨料,在鼓励采用低碱原材料(水泥、粉煤灰、矿渣粉、外加剂)的前提下,对混凝土总碱含量可不作限值要求。因此,表9所列试验配合比的混凝土的抗碱—骨料反应性均为合格。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
八、试验结论与配合比建议â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
经过以上试验得出如下结论â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(一)所选择的水泥、粉煤灰、矿渣粉、砂、石和外加剂的性能均符合《客运专线预应力混凝土预制梁暂行技术条件》的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(二) 试验配合比混凝土氯离子含量经计算均满足不大于胶凝材料总量0.06%的规定,试验配合比混凝土氯离子含量合格。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(三)试验配合比混凝土的坍落度、含气量、泌水率等拌和物性能均满足预制梁和高性能混凝土技术条件和施工工艺的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(四)试验配合比混凝土各龄期的强度和弹性摸量均能满足C50混凝土配制要求以及箱梁初张拉和脱模的工艺要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(五) 试验配合比混凝土的电通量均能满足56d龄期不大于1000的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(六) 所选择试验的编号为X-01X-02X-04X-07X-08X-10、的六个配合比混凝土的抗冻性均能满足F200的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(七)所选择试验的编号为X-01X-02X-04X-07X-08X-10、的六个配合比混凝土的抗渗性均能满足P20的要求。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
(八)试验配合比混凝土的抗碱—骨料反应性为合格。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
基于以上结论,建议试验梁按表X-04要求进行试制,并根据试验梁混凝土的水化热生温和实体梁硬化混凝土性能测试结果确定箱梁的生产配合比。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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6#

回复:32m铁路箱梁C50混凝土配合比研究

学习了,感谢楼主。â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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7#

回复:32m铁路箱梁C50混凝土配合比研究

长见识了â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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8#

回复:32m铁路箱梁C50混凝土配合比研究

谢谢,顶一下â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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9#

回复:32m铁路箱梁C50混凝土配合比研究

太长了,谢谢â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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10#

回复:32m铁路箱梁C50混凝土配合比研究

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11#

回复:32m铁路箱梁C50混凝土配合比研究

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12#

回复:32m铁路箱梁C50混凝土配合比研究

学习了,长见识了â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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13#

文章中有个最大的疑问:混凝土的假定容重推算为360+110+742+1068=2280kg/m3,实测都在2420左右,写的再好也是个假论文â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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14#

看的学习â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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15#

学的â6Ôõ†½3P·Âbbs.3c3t.comkUNãϼbÓë
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