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大粒径沥青混合料由于其优良的力学性能,被广泛地应用于我国沥青混凝土路面下面层结构中,随着半刚性基层材料在使用过程中所表现出的与面层粘结性差、易开裂等缺点,将大粒径沥青混合料作为沥青混凝土路面基层材料的趋势越来越得到重视。作为基层材料,大粒径沥青混合料的回弹模量将直接影响到沥青混凝土路面结构的承载能力。沥青混凝土路面承受汽车动态荷载作用,产生相应的动态力学响应,材料的动态模量更具有实际意义。本文在对AC 25、AC 30两种大粒径混合料的动、静态模量进行试验研究的基础上,建立了材料动、静态模量之间的关系,为相应的研究和力学计算提供参考,同时,还对两种沥青混合料的应力依赖性进行了研究。
Due to its excellent mechanical properties, large-size asphalt mixture is widely used in the asphalt concrete pavement under the layer structure, with the semi-rigid base material in the course of its performance with the surface layer of poor adhesion, easy to crack And other shortcomings, the large-size asphalt mixture as asphalt pavement base material more and more attention. As the grass-roots material, the rebound modulus of large-size asphalt mixture will directly affect the bearing capacity of asphalt pavement structure. Asphalt concrete pavement to withstand the dynamic load of vehicles, resulting in the corresponding dynamic mechanical response, the dynamic modulus of the material more practical significance. Based on the experimental study on the dynamic and static moduli of AC 25 and AC 30 large particle size mixes, the relationship between the dynamic and static moduli of the material was established and the corresponding references were provided for the research and mechanical calculation At the same time, the stress dependence of the two asphalt mixtures was also studied.