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研究了沥青混合料现场压实特性与芯样物理力学特性,并与室内马氏试件物理力学指标进行对比,分析了马歇尔方法与路面现场性能相关性。研究结果表明:在压实机械水平充分碾压作用下,沥青路面所能达到最大密度比标准马歇尔试件密度至少高1.02倍,VV、VMA分别降低了1.9%和1.8%,VFA增大了11.3%;AC-20沥青混合料标准马氏试件的稳定度、抗压强度、劈裂强度、SCB抗拉强度和60℃抗剪强度平均为路面芯样的65.7%、71.8%、73.7%、67.7%和69.4%,平均为69.7%,表明现行马歇尔试验方法已落后实际,采用马歇尔方法设计施工沥青路面,通车后其体积参数是不稳定的,在交通荷载反复作用下路面可能进一步压密而产生变形破坏。
The field compaction characteristics and core physical and mechanical properties of asphalt mixture were studied. Compared with the physical and mechanical indexes of indoor Marsh specimen, the correlation between Marshall method and on-site performance was analyzed. The results show that the maximum density of asphalt pavement can reach 1.02 times higher than that of the standard Marshall specimen, VV and VMA reduce by 1.9% and 1.8%, VFA increase by 11.3 %; The stability, compressive strength, splitting strength, SCB tensile strength and shear strength at 60 ℃ of AC-20 Asphalt Mixture are 65.7%, 71.8% and 73.7% 67.7% and 69.4% respectively, with an average of 69.7%. This indicates that the current Marshall test method is outdated. The Marshall method is used to design and construct the asphalt pavement. The volumetric parameters of the asphalt pavement are not stable when the traffic load is applied. Produce deformation damage.