西柞高速公路沥青混凝土中面层AC-25配比设计报告(目标配合比)svFYbÖ:xbbs.3c3t.com%8=
=æ*É
设计依据:《公路工程集料试验规程》JTGE42-2005;《公路沥青路面施工技术规范》JTG F40-2004;《公路工程沥青及沥青混合料试验规程》JTJ052-2000;svFYbÖ:xbbs.3c3t.com%8=
=æ*É
一、原材料svFYbÖ:xbbs.3c3t.com%8=
=æ*É
沥青:采用SBS聚合物改性沥青;svFYbÖ:xbbs.3c3t.com%8=
=æ*É
碎石:采用柞水营盘镇石料厂生产的碎石;svFYbÖ:xbbs.3c3t.com%8=
=æ*É
石屑:采用柞水营盘镇石料厂生产的石屑;svFYbÖ:xbbs.3c3t.com%8=
=æ*É
矿粉:采用镇安矿粉厂生产的石灰岩矿粉;svFYbÖ:xbbs.3c3t.com%8=
=æ*É
水泥:采用陕西铜川水泥厂生产的P.032.5水泥。svFYbÖ:xbbs.3c3t.com%8=
=æ*É
二、配合比设计svFYbÖ:xbbs.3c3t.com%8=
=æ*É
15-25 mm: 10-20 mm :5-15 mm:0-5 mm :水泥svFYbÖ:xbbs.3c3t.com%8=
=æ*É
13 : 32 : 25 : 28 :2 svFYbÖ:xbbs.3c3t.com%8=
=æ*É
三、最大理论相对密度计算 (各种原材料密度如下)svFYbÖ:xbbs.3c3t.com%8=
=æ*É
svFYbÖ:xbbs.3c3t.com%8=
=æ*É
集料名称svFYbÖ:xbbs.3c3t.com%8=
=æ*É | 表观相对密度(g/㎝3)svFYbÖ:xbbs.3c3t.com%8=
=æ*É | 毛体积相对密度(g/㎝3)svFYbÖ:xbbs.3c3t.com%8=
=æ*É |
10-25 mmsvFYbÖ:xbbs.3c3t.com%8=
=æ*É | 2.693svFYbÖ:xbbs.3c3t.com%8=
=æ*É | 2.657svFYbÖ:xbbs.3c3t.com%8=
=æ*É |
10-20 mmsvFYbÖ:xbbs.3c3t.com%8=
=æ*É | 2.681svFYbÖ:xbbs.3c3t.com%8=
=æ*É | 2.641svFYbÖ:xbbs.3c3t.com%8=
=æ*É |
5-10 mmsvFYbÖ:xbbs.3c3t.com%8=
=æ*É | 2.678svFYbÖ:xbbs.3c3t.com%8=
=æ*É | 2.636svFYbÖ:xbbs.3c3t.com%8=
=æ*É |
0-5 mmsvFYbÖ:xbbs.3c3t.com%8=
=æ*É | 2.664svFYbÖ:xbbs.3c3t.com%8=
=æ*É | 2.623svFYbÖ:xbbs.3c3t.com%8=
=æ*É |
水 泥svFYbÖ:xbbs.3c3t.com%8=
=æ*É | 3.100svFYbÖ:xbbs.3c3t.com%8=
=æ*É |
沥 青svFYbÖ:xbbs.3c3t.com%8=
=æ*É | 1.018svFYbÖ:xbbs.3c3t.com%8=
=æ*É |
svFYbÖ:xbbs.3c3t.com%8=
=æ*É
注:0-5 mm是将其中的2.36 mm以上部分筛除后按粗集料方法(T0304)测定毛体积相对密度。svFYbÖ:xbbs.3c3t.com%8=
=æ*É
计算矿料的合成毛体积相对密度。svFYbÖ:xbbs.3c3t.com%8=
=æ*É
rsb=2.645svFYbÖ:xbbs.3c3t.com%8=
=æ*É
计算矿料的合成表观相对密度。svFYbÖ:xbbs.3c3t.com%8=
=æ*É
rsa=2.684 svFYbÖ:xbbs.3c3t.com%8=
=æ*É
Wx=0.56svFYbÖ:xbbs.3c3t.com%8=
=æ*É
C=0.78svFYbÖ:xbbs.3c3t.com%8=
=æ*É
计算矿料的有效相对密度。 rse=2.676svFYbÖ:xbbs.3c3t.com%8=
=æ*É
计算出不同油石比各沥青混合料的最大理论相对密度如下:svFYbÖ:xbbs.3c3t.com%8=
=æ*É
3.0 2.555svFYbÖ:xbbs.3c3t.com%8=
=æ*É
3.5 2.536svFYbÖ:xbbs.3c3t.com%8=
=æ*É
4.0 2.518svFYbÖ:xbbs.3c3t.com%8=
=æ*É
4.5 2.501svFYbÖ:xbbs.3c3t.com%8=
=æ*É
5.0 2.483svFYbÖ:xbbs.3c3t.com%8=
=æ*É
4.1 2.515svFYbÖ:xbbs.3c3t.com%8=
=æ*É
四、马歇尔试验svFYbÖ:xbbs.3c3t.com%8=
=æ*É
按照设计要求在矿料中增加了2%水泥替代部分矿粉、拌合沥青混合料中加了3.5‰pl-1型沥青抗剥落剂,用计算确定的矿料配合比,分别采用油石比3.0%svFYbÖ:xbbs.3c3t.com%8=
=æ*É
3.5%、4.0%、4.5%、5.0%、制作5组马歇尔试件,每组4块。成型时两面各锤击75次,沥青加热165℃,拌和锅拌和温度175℃,击实温度165℃。通过马歇尔试验,测定试件的密度、稳定度、流值,计算沥青混合料的最大理论相对密度,空隙率、沥青饱和度和矿料间隙率。试验结果汇总如下:svFYbÖ:xbbs.3c3t.com%8=
=æ*É
svFYbÖ:xbbs.3c3t.com%8=
=æ*É
svFYbÖ:xbbs.3c3t.com%8=
=æ*É
五、最佳油石比的确定svFYbÖ:xbbs.3c3t.com%8=
=æ*É
根据5组试验结果绘制的关系曲线查得:svFYbÖ:xbbs.3c3t.com%8=
=æ*É
相应于密度最大值的油石比为4.72%;svFYbÖ:xbbs.3c3t.com%8=
=æ*É
相应于稳定度最大值的油石比为4.04%;svFYbÖ:xbbs.3c3t.com%8=
=æ*É
相应于要求空隙率范围中值的油石比为4.0%;svFYbÖ:xbbs.3c3t.com%8=
=æ*É
相应于要求饱和度范围中值的油石比为3.91%;svFYbÖ:xbbs.3c3t.com%8=
=æ*É
空隙率、饱和度、稳定度、流值共同符合规范要求的油石比范围为3.53%-4.3%。svFYbÖ:xbbs.3c3t.com%8=
=æ*É
OAC1=(4.72+4.04+4.0+3.91)/4=4.2%svFYbÖ:xbbs.3c3t.com%8=
=æ*É
OAC2=(3.53+4.30)/2=3.9%svFYbÖ:xbbs.3c3t.com%8=
=æ*É
OAC=(4.2 +3.9)/2=4.1%svFYbÖ:xbbs.3c3t.com%8=
=æ*É
六、最佳油石比歇尔检验svFYbÖ:xbbs.3c3t.com%8=
=æ*É
根据所确定的最佳油石比4.1%,制作马歇尔试件,测定各项指标。结果见表:svFYbÖ:xbbs.3c3t.com%8=
=æ*É
svFYbÖ:xbbs.3c3t.com%8=
=æ*É
试验表明,油石比在4.1%时各项试验指标均符合技术规范要求。svFYbÖ:xbbs.3c3t.com%8=
=æ*É
七、附各项试验资料svFYbÖ:xbbs.3c3t.com%8=
=æ*É
svFYbÖ:xbbs.3c3t.com%8=
=æ*É