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采用颗粒力学的基本理论分析了颗粒相互作用时的运动规律,以沥青混合料堆积形成的休止角建立沥青混合料离析模型,推导出沥青混合料的离析势能指数计算公式,开发了沥青混合料离析测定仪,测定了贝雷设计法公称最大粒径16 mm的离析势能指数,并通过试验提出公称最大粒径16 mm的沥青混合料离析标准。试验结果表明:在CA0.5级配附近,沥青混合料的压实比约为0.40,离析势能指数约为0.200,两者都存在一个最小值,且沥青混合料具有良好的压实性和工作稳定性,在施工过程不易发生离析,依据评价标准将沥青混合料离析划分为无离析、轻微离析、中等离析和严重离析,该评价模型和评价标准可用于沥青混合料离析的现场检测和判别。
Based on the basic theory of particle mechanics, the motion law of particle interaction was analyzed, the asphalt mixture segregation model was established based on the angle of repose formed by the accumulation of asphalt mixture, the formula for calculating the potential energy index of asphalt mixture was deduced, and the asphalt mixture segregation Measuring instrument, the Bailey design method for the determination of the maximum particle size of 16 mm of the analytic potential index, and through the test proposed nominal maximum particle size of 16 mm asphalt segregation standards. The experimental results show that the compaction ratio of asphalt mixture is about 0.40 and the separation potential index is about 0.200 near CA0.5, both have a minimum, and the asphalt mixture has good compaction and work Stability, segregation is not easy to occur during the construction process. According to the evaluation criteria, the segregation of asphalt mixture is divided into no segregation, minor segregation, moderate segregation and serious segregation. The evaluation model and evaluation criteria can be used in on-site detection and discrimination of asphalt mixture segregation.