中文摘要：

为了分析沥青混合料剪胀力学行为,阐述了沥青混合料剪胀行为,回顾了剪胀相关试验及剪胀模型的现状和问题,并对其研究方向进行了展望。研究结果表明：沥青混合料剪胀行为在车辙产生中起着关键作用;采用X-ray CT技术、离散元方法等对颗粒空间分布、大小、接触方式、破碎等进行定性及定量地分析沥青混合料变形机理和力学特性;通过建立微观力学模型,联系宏观力学变量与微观力学变量,使得微观测试、力学试验和数值模拟连为一体,预测沥青混合料剪胀行为,可为抗车辙沥青路面设计提供指导,开拓沥青混合料设计新思路。

英文摘要：

This paper elaborated the dilation behavior of asphalt mixtures.The research developing and existing problems of dilatancy tests and models were reviewed.Moreover,the future work of dilatancy tests and models were discussed.The research results show that the asphalt mixture dilation behavior plays a key role in the process of rutting;the deformation mechanism and mechanics characteristics of asphalt mixtures can be qualitatively and quantitatively analyzed by using X-ray CT technology and discrete element method to obtain the distribution,size,contact,and crush of particles;the microscopic testing,mechanics testing,and numerical modeling can be used to predict the dilation behavior of asphalt mixtures as a system through building microscopic mechanics model and connecting macroscopic mechanics variable to microscopic mechanics variable,which can be used to guide the design of anti-rutting asphalt pavement;the new prospect for asphalt mixture designing will be developed.