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查看: 2819\|回复: 0	邢临高速公路沥青碎石基层设计与施工 [复制链接]

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发表于 2006-10-25 12:25 |只看楼主

邢临高速公路沥青碎石基层设计与施工ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

随着国民经济的高速发展，交通量迅速增长，车辆大型化，严重超载等现象使沥青路面面临严峻的考验，许多高速公路建成后不久就不能适应交通的需要，早期破坏的情况时有发生。为缓解高速公路重载交通下的动水压力，我国开始应用推广以沥青碎石为代表的柔性基层。沥青碎石基层可以增强路面排水能力，减少沥青层的温度收缩裂缝和防止反射裂缝的发生，改善路面使用性能，提高其使用寿命。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

1.0 工程概况 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

邢临高速公路是河北省“四纵、四横、十条线”公路网主骨架的重要组成部分，是河北省“十五”期间重点公路建设项目。全长104.64km，双向四车道，路基宽26m，设计车速100km/h。邢临高速公路在K0+000—K15+600段，进行了柔性基层沥青路面铺筑试验，选用沥青碎石用作上基层材料。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

沥青碎石基层即沥青稳定碎石类沥青混合料，其设计的基本的思路是保证沥青混合料中具有足够的粗集料，使之具有很好的高温、力学性能，按其设计的空隙率大小可以分为3种：开式（排水式基层，设计空隙率在15%以上）、半开式（设计空隙率在8%~15%之间）、密实式（设计空隙率在3%~8%之间），由于本项目作为高速公路基层，因此采用密实式的沥青混合料。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

考虑邢临高速的交通特征、施工技术和课题研究的实际需要，采用ATB—40和ATB—30两种密级配混合料，五种方案，具体如下： ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K0+000—K3+582.7 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K3+582.7—K4+986.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K4+986.5—K6+382.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K6+382.5—K10+048 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K10+048—K15+600 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

4㎝玄武岩改性沥青砼 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

SBR改性沥青粘层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

6㎝改性沥青砼 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

SBR改性沥青粘层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

16㎝沥青碎石ATB-30 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

改性沥青下封层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

透层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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18㎝水稳砂砾 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

30㎝二灰土 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

4㎝玄武岩改性沥青砼 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

SBS改性沥青上封层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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6㎝改性沥青砼 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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SBR改性沥青粘层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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14㎝沥青碎石ATB-30 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

SBR改性沥青粘层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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透层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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15㎝级配碎石 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

17㎝水稳砂砾 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

18㎝二灰土 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

4㎝玄武岩改性沥青砼 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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SBR改性沥青粘层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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6㎝改性沥青砼 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

SBR改性沥青粘层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

14㎝沥青碎石ATB-30 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

SBS改性沥青下封层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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透层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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15㎝级配碎石 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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17㎝水稳砂砾 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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18㎝二灰土 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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4㎝玄武岩改性沥青砼 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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SBR改性沥青粘层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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6㎝改性沥青砼 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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SBR改性沥青粘层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

12㎝沥青碎石ATB-30 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

SBS改性沥青下封层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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透层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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18㎝水稳碎石 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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16㎝二灰碎石 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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18㎝二灰土 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

4㎝玄武岩改性沥青砼 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

SBS改性沥青上封层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

6㎝改性沥青砼 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

SBR改性沥青粘层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

10㎝沥青碎石ATB-40 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

SBR改性沥青粘层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

透层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

16㎝水稳碎石 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

18㎝水稳砂砾 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

18㎝二灰土 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.0室内试验 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.1成型方法

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

室内试验采用美国工程兵旋转压实剪切实验机（GTM）进行目标配合比、生产配合比设计，确定控制指标；采用马歇尔试验进行常规设计，建立比对关系，进行日常检测和控制。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.2级配设计 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

在组成沥青混合料的原材料选定后，沥青混合料的技术性质在很大程度上取决于集料间的级配组成，沥青混合料由于集料的级配不同，可以形成不同的组成结构。邢临高速公路沥青碎石基层级配参照规范，选用骨架密实型沥青碎石混合料，采用ATB-30, ATB-40两种级配形式。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

密级配沥青碎石矿料级配通过率范围（％）

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

层次 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

类型 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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方筛孔尺寸（mm ） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

下面层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ATB-30规范 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ATB-30实际 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ATB-40规范 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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ATB-40实际 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

53 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

100 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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100 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

37.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

100 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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100 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

90~100 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

99.6 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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31.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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90~100 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

90.1 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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75~92 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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89.8 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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26.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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70~90 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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75.6 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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65~85 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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76.4 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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19.0 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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53~72 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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59.8 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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49~71 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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61.6 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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16 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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44~66 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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55 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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43~63 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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56.6 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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13.2 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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39~60 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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49.8 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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37~57 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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50.4 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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9.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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31~51 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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40.6 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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30~50 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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40.6 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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4.75 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

20~40 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

29.6 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

20~40 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

31.4 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.36 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

15~32 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

21.7 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

15~32 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

23.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

1.18 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

10~25 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

17.4 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

10~25 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

18.7 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

0.6 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

8~18 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

11.7 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

8~18 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

12.6 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

0.3 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

5~14 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

8.8 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

5~14 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

7.0 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

0.15 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3~10 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

6.4 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3~10 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

6.7 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

0.075 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2~6 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.2 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2~6 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.4 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.3原材料性能 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

原材料质量是影响路面质量、使用寿命的重要因素。优质的原材料是保证沥青混合料具有优良路用性能的先决条件，为了满足气候环境与交通对路用性能的要求，必须做好原材料的选择。通过测试沥青、石灰岩粗集料、细集料和矿粉等材料的性能和技术指标来检测材料是否满足规范要求，从而完成原材料的选择。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.3.1 沥青ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ
ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

拌制沥青混合料所用的沥青材料其技术要求随气候条件、交通情况、沥青混合料的类型和施工条件等因素而异，邢临高速公路基层沥青混合料采用山东滨洲产中海36-1普通70号A级石油沥青，其技术指标满足JTG F40-2004《公路沥青路面施工技术规范》 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.3.2 集料ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ
ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

集料是沥青混合料的关键材料之一，其力学性能是决定混合料强度特性的最重要因素，它的颗粒形状不仅影响混合料的构架，也直接关系到混合料的抗车辙能力与抗疲劳性能等材料特性，此外，集料与沥青的粘附等级对混合料强度的形成也起关键作用，因此选择优质的集料是沥青混合料具有优良路用性能的重要保证。本项目采用邢台太子井正大石料场，经初步破碎至50~100㎝拳石，运至存料场进行二次加工破碎，其几何形状和含泥量指标都优于《规范》要求的标准。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.3.3 矿粉ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ
ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

沥青混合料的填料宜采用石灰岩或岩浆岩中的强基性岩石等石料经磨细得到的矿粉,本项目采用10~20㎝的碎石定点加工而成。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.4最佳沥青用量 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.4.1GTM试验 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

GTM设计方法是利用GTM实验机模拟行车作用成型试件，从而求出最佳沥青用量和最大干密度的设计方法。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

GTM实验机通过旋转压实试件，使其密度达到汽车轮胎实际作用于路面时所产生的最终密度，即通过对试件施加垂直压力，该压力通过实际测试汽车轮胎对路面的实际压强确定，试件在该压力作用下，被旋转压实到平衡状态(所谓平衡状态，是指每旋转100次试件密度变化率为0.016g/cm3)来决定沥青混凝土路面的设计密度及最佳沥青用量。GTM确定最佳沥青用量有三个指标。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

(1)应变比(GSI)：是指沥青混合料在压实到平衡状态时是否会出现塑性变形。(最终应变和最小应变之比小于1.05)。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

(2)抗剪安全系数(GSF)：是指沥青混凝土被压实到平衡状态时的抗剪强度是否达到在行车荷载任用下需承受的剪应力。抗剪强度/剪应力，要求大于1.0。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

(3)试件压实到平衡状态的密度。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

利用GTM试验，得到的试验结果为： ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ATB-30：最佳油石比3.2%，标准密度为2.467 g/㎝³

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ATB-40：最佳油石比3.1%，标准密度为2.475 g/㎝³ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ
ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.4.2马歇尔试验 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

沥青碎石ATB-30马歇尔试验结果如下： ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

沥青用量（%） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

油石比 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

（%） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

表观密度（g/㎝³） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

空隙率 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

VV（%） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

矿料间隙率VMA（%） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

沥青饱和度VFA（%） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

稳定度 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

MS ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

（KN） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

流值 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

FL（0.1㎜） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.82 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.9 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.458 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

4.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

11.3 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

60.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

20.92 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

19.2 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.10 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.2 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.467 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.7 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

11.2 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

67.3 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

22.85 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

23.1 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.38 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.462 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

11.7 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

70.3 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

19.44 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

36.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

根据沥青选定图，沥青用量选用3.1%，油石比为3.20%，表观密度为2.467 g/㎝³。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

沥青碎石ATB-40马歇尔试验结果如下： ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

沥青用量（%） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

油石比 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

（%） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

表观密度（g/㎝³） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

空隙率 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

VV（%） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

矿料间隙率VMA（%） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

沥青饱和度VFA（%） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

稳定度 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

MS ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

（KN） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

流值 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

FL（0.1㎜） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.82 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.9 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.455 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

4.0 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

10.9 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

63.8 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

32.2 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

26.8 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.1 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.2 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.466 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.3 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

11.0 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

70.2 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

32.0 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

23.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.38 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.464 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.9 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

11.3 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

74.1 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

25.6 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

25 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

根据沥青选定图，沥青用量选用3.0%，油石比为3.1%，表观密度为2.462 g/㎝³。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.4.3对比关系： ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ATB-30：GTM试验与马歇尔试验的密度比为：2.467/2.467=1.0 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ATB-40：GTM试验与马歇尔试验的密度比为：2.475/2.462=1.005 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.5混合料性能检测 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.5.1水稳定性检测： ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

浸水马歇尔试验 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

类型 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

标准马歇尔稳定度（KN） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

浸水马歇尔稳定度（KN） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

浸水残留稳定度（%） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ATB-40 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

27.57 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

26.78 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

97.1 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ATB-30 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

22.76 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

21.87 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

96.1 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

冻融劈裂试验：冻融劈裂残留强度比为：85% ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2.5.2高温性能 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

采用60℃车辙试验检测混合料的高温稳定性 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

类型 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

动稳定度（次/mm） ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

1 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

2 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

平均 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ATB-30 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

8710.576 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

8230.495 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

7724.592 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

8221.89 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ATB-40 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

8775.104 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

10604.886 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

10027.960 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

9802.65 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.0施工工艺 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.1施工前及下承层准备 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

认真编写《试验路施工组织设计》，报监理工程师批准，按常规调试拌和楼，满足生产配合比各项要求；对下承层和施工机具作全面检查，现场就位。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.2混合料拌和 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

沥青混合料拌和采用SPECO-3000型沥青拌合楼拌和，拌和时间以混合料拌和均匀、所有矿料颗粒全部裹覆沥青结合料为度，并经试拌确定。拌和时严格控制混合料的温度和拌和时间。沥青采用导热油加热，加热温度控制在150℃~170℃范围内，矿料加热温度为170℃~185℃，沥青与矿料的加热温度应调节到使拌和的沥青混合料出场温度在150℃~165℃，不得有花白料、超温料，当沥青混合料超过195℃的应立即废弃，混合料运到现场温度不得低于140℃~150℃，对于每车料出场温度要有专人检测。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.3混合料的运输 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

从拌和机向运料车上放料时，应每卸一斗混合料挪动一下汽车位置，以减少粗集料的离析现象。尽量缩小下落的落距，运料车用篷布覆盖。摊铺过程中运料车应在摊铺机前10～30㎝处停住，不得撞击摊铺机，卸料过程中运料车挂空挡，靠摊铺机推动前进。混合料运输车的运量较摊铺速度有所富余，施工过程中摊铺机前方应有不少于3辆运料车等候卸车。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.4混合料的摊铺 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

本试验段沥青碎石基层厚度ATB-40为10㎝厚，采用一层摊铺；ATB-30沥青碎石厚度为12、14、16cm，考虑到用一台拌和楼，为防止摊铺时离析，12、14、16cm沥青碎石采用两层摊铺。施工时采用两台摊铺机联合摊铺，前一台摊铺机靠中央分隔带一侧摊铺，一侧传感器搭在钢铰线上，另一侧用浮动基准梁，后一台摊铺机一侧传感器搭在钢绞线上，另一侧用滑靴，两台摊铺机相距一般为5—10m，横向搭接宽度应有5—10㎝，把滑靴放在前一台摊铺机铺出的基准面，调整好横坡，进行摊铺。摊铺过程中，摊铺机速度保持2m/min均匀行驶，在铺筑过程中，摊铺机螺旋送料器应不停顿的转动，两侧保持有不少于送料器高度2/3的混合料，并保证在全宽断面上不离析。施工时，两构造物间尽量一次摊铺碾压成型，以减少横缝。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.5混合料的压实及成型 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

压实设备配有YEC10L双光轮振动压路机（10T）1台，XD120双光轮振动压路机（12T）2台，CC722双光轮振动压路机（17T）1台，XP260胶轮压路机（26T）1台，选择合理组合方式及初压、复压和终压三碾压步骤，压路机以匀速行驶，速度符合规范要求。碾压时由低向高即由路外侧向内侧进行，超高段由曲线内侧向外侧进行，碾压方向与路线方向平行，并沿同一轮迹返回，每次错轴重叠1/3～1/2轮宽，压路机不能中途停留、转向或制动。并不得停留在当天摊铺的路面上或高于70℃的已经压过的路面上。另外，终压温度不低于80℃。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

初压：第一遍先用胶轮碾压一遍，再用YEC10L双钢轮压路机碾压一遍，驱动轮朝向摊铺机，静前进，振动返回，碾压路线、方向不能突然改变，往返转折点应错开成阶梯形，钢轮压路机紧跟胶轮压路机进行碾压，要求钢轮压路机与胶轮压路机之间错开两轮。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

复压：复压紧接在初压后进行，复压先用12T振动压路机碾压一遍，再用17T碾压一遍,采用高频低振方法，使压实度达到规范要求。另外需注意12T压路机紧跟17T压路机进行碾压，要求12T压路机与17T压路机之间错开两轮。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

终压：使用12T压路机静压1～2遍，紧接在复压后进行，至消除表面轮迹为止。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.6接缝处理 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

横缝与铺筑方向垂直，形成一条碾压密实的边缘，下次摊铺前，在上次末端涂补适量粘层沥青，在碾压横接缝时先纵向后横向碾压，将压路机位于已压实的面层上，错过新铺层15cm，然后每压一遍向新铺层推进15-20cm，以推进到压路机轮宽度的1/3处进为止，改为正常碾压，在碾压时由专门人员用三米直尺检查接头处，发现问题及时处理保证接头部位的平整度。注意上、下层的横缝要错开至少1m的距离。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

开放交通：路面冷却后根据实际需要开放交通。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

3.7施工注意事项 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

注意原材料质量及混合料级配；保证混合料拌和温度和拌和时间，观察出仓沥青混合料色泽、拌和均匀性、让沥青充分裹覆集料；保温运输、保证混合料摊铺、碾压温度，减小沥青混合料离析和集料离析；调试摊铺机具，确保摊铺厚度，合理组织压实机具，增大压实功，确保压实度。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

4.0现场检测 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

4.1弯沉试验： ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

采用5.4米贝克曼梁测定，完工一个月。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

桩号 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

弯沉（0.01mm）左幅 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

桩号 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

弯沉（0.01mm）右幅 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

行车道 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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超车道 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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行车道 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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超车道 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K3+950 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

26.25 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

15.70 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K9+250 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

9.7 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

14.55 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K4+000 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

21 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

22.70 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K9+300 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

9.7 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

11.3 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K4+050 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

26.25 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

22.75 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K9+350 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

8.1 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

11.3 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K4+100 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

24.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

22.70 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K9+400 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

16.2 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

8.1 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K4+150 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

24.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

22.75 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K9+450 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

19 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

11.3 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K4+200 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

28.0 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

26.25 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K9+500 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

11.3 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

11 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K4+250 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

22.75 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

19.25 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K9+550 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

12.9 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

9.7 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K4+300 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

29.7 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

22.75 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K9+600 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

11.3 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

6.5 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

当基层有级配碎石时弯沉偏大，当基层为半刚性基层时弯沉合格。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

4.2压实度检测 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

测试层位置 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K3+582.7~K6+379.8左幅 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K6+382.5~K10+015.44右幅 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

K10+080.56~K14+670 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

右幅 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

第一层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

第二层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

第一层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

第二层 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

测点数 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

47 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

47 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

60 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

60 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

45 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

最大值 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

100 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

100.1 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

100 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

100 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

100 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

最小值 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

97.4 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

97.7 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

98.1 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

97.1 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

98.0 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

平均值 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

99.13 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

98.87 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

98.97 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

98.88 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

99.05 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

标准偏差 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

0.551 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

0.354 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

0.625 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

0.560 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

0.488 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

代表值 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

98.99 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

98.78 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

98.83 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

98.76 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

98.93 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

5.0结语 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

从试验检测结果看，沥青碎石的高温性能比较好，水稳定性良好，但在有级配碎石的基层强度和刚度稍微差一些。车辙试验动稳定度比较高的原因可能是混合料粒径较大；从施工性能来看，混合料由于粗料多，容易出现离析，因此要从生产能力、施工工艺上严格控制。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

在我国柔性基层使用很少，近两年才开始一些研究。山东、山西、江苏等省进行了柔性基层研究，我省也在衡德高速公路铺筑了试验段。河北省高速公路建设正值建设高峰期，为了预防沥青路面的早期破坏，延长公路的使用寿命，使河北省的高速公路建设投资效益达到最大，进行柔性基层的研究是非常有必要的。采用柔性基层结构，使工程造价较普通半刚性基层有所增加，但是随着时间的增长，其优良的使用性能会逐渐显现出来，大幅度降低路面的养护维修费用，从长远利益来看，柔性基层具有更好的经济性能。 ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

另外，柔性基层在以后路面的修复中，柔性基层材料可以完全被利用，不但可以大大降低维修费用，节约能源，而且可以减少环境污染，因此采用柔性基层具有更好的经济和社会效益。ZÐlýúú~bbs.3c3t.com3HjM8}ÛÉ

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