成型方法对ATB-30混合料性能的影响

发布时间：2018-09-01 06:24

【摘要】：为了更好地模拟沥青混合料的现场实际工况,分别采用垂直振动成型方法(VVCM)和马歇尔击实法成型ATB-30混合料试件,研究了不同成型方法对成型试件的物理、力学特性的影响,并对两种成型方式进行了评价。对比分析结果表明:油石比相同时,VVCM试件的密度比马歇尔试件平均提高了1.02倍,VVCM试件的马歇尔稳定度、抗压强度、劈裂强度、抗拉强度平均分别为马歇尔试件的1.54倍、1.47倍、1.39倍、1.45倍;VVCM试件的力学强度最大值对应油石比比马歇尔试件的力学强度最大值对应油石比小3%左右。在各自最佳油石比下,VVCM试件的马歇尔稳定度、抗压强度、劈裂强度、抗拉强度分别为马歇尔试件的1.45倍、1.45倍、1.44倍、1.44倍;VVCM试件的力学强度测试精度可达92%,而马歇尔试件不足70%,表明VVCM的可靠性要比马歇尔法更高。
[Abstract]:In order to better simulate the actual working conditions of asphalt mixture, vertical vibration molding method (VVCM) and Marshall compaction method (VVCM) were used to form ATB-30 mixture samples, and the effects of different molding methods on the physical and mechanical properties of the samples were studied. Two kinds of molding methods were evaluated. The results of comparative analysis show that the density of VVCM specimen is 1.02 times higher than that of Marshall specimen when the stone ratio is the same, and the Marshall stability, compressive strength and splitting strength of VVCM specimen are increased by 1.02 times. The average tensile strength of the VVCM specimen is 1.54 times as much as that of the Marshall specimen, 1.47 times 1.39 times and 1.45 times of that of the VVCM specimen, respectively. The ratio of stone to stone is about 3% smaller than that of Marshall specimen. The Marshall stability, compressive strength and splitting strength of VVCM specimens are obtained under their respective optimum stone ratios. The tensile strength of VVCM specimen is 1.45 times that of Marshall specimen, 1.44 times and 1.44 times higher than that of Marshall specimen, and the accuracy of mechanical strength test is 92%, but less than 70% of Marshall specimen, which indicates that the reliability of VVCM is higher than that of Marshall method.
【作者单位】：长安大学特殊地区公路工程教育部重点实验室;陕西省交通厅基本建设工程质量监督站;金华市公路管理局;
【基金】：交通运输部行业联合科技攻关项目(2010353361300) 浙江省交通运输厅交通科技计划项目(2011H25)
【分类号】：U414

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