Static and dynamic mechanical properties of warm mixed asphalt mixture before and after aging
[摘要] In order to study the effect of warm mix agent on the mechanical properties of warm mix asphalt mixture before and after aging, this article uses the uniaxial compression test and the uniaxial dynamic modulus test which were carried out on the unaged, short-term aging and long-term aging conditions of the matrix and SBS modified asphalt mixture mixed with RH and Evotherm warm mix agent respectively. The results show: the performance of each asphalt mixture at low temperature and high frequency is equivalent, indicating that dynamic mechanics is not suitable for evaluating the low temperature performance of asphalt mixture; high temperature and low frequency can be used as an evaluation index for high temperature anti-rutting of asphalt mixture. By analyzing the rebound modulus, uniaxial dynamic modulus and other results, it shows that the addition of the warm mix agent improves the low temperature performance of the asphalt mixture, alleviates the aging of the asphalt mixture, and the aging of the aging also brings about a decrease in high temperature stability. The beneficial effect of the Evotherm is weak, and the low temperature performance of the asphalt mixture after aging and the high temperature stability of the warm asphalt mixture after long-term aging are improved. From the comprehensive analysis of static and dynamic mechanical properties, the elastic modulus and dynamic modulus of asphalt mixture are not much different, and the dynamic static modulus of the mixture after aging is quite different, which provides a theoretical basis for the dynamic and static modulus transformation.
[发布日期] [发布机构] Civil Engineering College, Inner Mongolia University of Technology, Hohhot; 010051, China^1;Inner Mongolia Communication Engineering Quality Supervision Bureau, Hohhot; 010051, China^2;Inner Mongolia Key Laboratory of Roa. Structure and Material, Hohhot; 010051, China^3
[效力级别] 无线电电子学 [学科分类]
[关键词] Beneficial effects;Comprehensive analysis;Dynamic modulus tests;High temperature stability;Low temperature performance;SBS-modified asphalt;Static and dynamic mechanical properties;Uni-axial compression tests [时效性]
