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章研究了沥青混合料压实特性及芯样与室内马氏试件物理力学特性,建立了马歇尔击实次数与路面现场压实相关性。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马歇尔试件密度至少高1.02倍,现行马歇尔方法设计施工沥青路面在交通荷载反复作用下容易被追密而产生车辙;为了获取与路面芯样最大密相同的马氏试件,小马氏试件与大马氏试件击实次数应分别修正为145次和170次;基于现场压实功修正后马歇尔试件强度增大,与标准马氏试件相比,修正马氏试件稳定度、SCB抗拉强度、60℃抗剪强度平均增幅为23%、18%和19%,证明沥青混合料抗变形能力显著提升。
In this paper, the compaction characteristics of asphalt mixture and the physical and mechanical properties of core samples and indoor Markov test pieces were studied. The correlation between Marshall compaction times and on-site compaction was established. The results show that the maximum density of asphalt pavement is at least 1.02 times higher than that of the Marshall specimen under the fully compacted level of compaction machinery. The asphalt pavement designed and constructed by the current Marshall method can be easily chased by repeated actions under the traffic load Rutting; in order to obtain the same as the pavement core sample of the same density of Marsh specimens, small Marshmallows specimens and the number of copies of the test should be revised to 145 and 170 times; based on the field compaction after correction Marshall test Compared with the standard Markov test piece, the modified Markov test piece stability, SCB tensile strength, 60 ° C shear strength average increase of 23%, 18% and 19%, proof asphalt mixture anti-deformation Ability to significantly improve.