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沥青混合料由集料、沥青胶结料和空隙组成。沥青混合料体积90%由集料构成,集料所形成的结构主要取决于集料的粒径分布及其形状。该文提出了基于集料级配理论的沥青混合料骨架结构,并以此来表征沥青混合料的路用性能。研究提出了一个基于球体填充理论的计算方法。参数包括:一级结构下的空隙率、一级结构的破坏因子和沥青胶结料在骨架结构的分布情况,它们可用于评价骨架结构的承载能力。采用骨架结构模型对几种不同级配的沥青混合料高温抗车辙能力和水稳性进行了预测,预测结果和室内外试验结果具有很好的相关性,建立的骨架结构模型可很好地用于判别沥青混合料的抗车辙性能。
Asphalt mixes consist of aggregates, asphalt binder and voids. The volume of asphalt mixture is 90% of aggregate, and the structure of aggregates depends on the particle size distribution and shape of aggregate. In this paper, the asphalt aggregate skeletal structure based on aggregate gradation theory is proposed and used to characterize the road performance of asphalt mixture. The research proposes a calculation method based on the theory of sphere filling. Parameters include: the primary structure of the porosity, the primary structure of the destructive factors and the distribution of asphalt binder in the skeleton structure, they can be used to evaluate the load-bearing capacity of the skeleton structure. The skeleton structure model was used to predict the rutting resistance and water stability of several gradations of asphalt mixtures at high temperature. The prediction results were in good agreement with the experimental results both inside and outside. The established skeleton structure model can be used well in Determine the anti-rutting performance of asphalt mixture.