Author(s): ZHANG Zheng-qi, LI Pei-long, SHI Xiao-ge, LI Yu-xin, Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Shandong Expressway Co., Ltd.
Pages: 13-20
Year: 2014 Issue:  10
Journal: Journal of Highway and Transportation Research and Development
Keyword:  road engineering; asphalt mixture; slip and shear test; high temperature stability; slip and shear energy; mineral aggregate;
Abstract: In order to study the relationship between high temperature stability of asphalt mixture and slip and shear behavior on mineral aggregate interface,based on the contact and slip behavior of mineral aggregate of asphalt mixture,the slip and shear test specifically for evaluating the slip and shear performance of asphalt mixture aggregate is put forward,and the effect of test condition,gradation and asphalt,etc.on the slip and shear energy is analyzed.The research shows that as the evaluation indicator of the test,slip and shear energy EI has the best correlation with rut dynamic stability DS at the temperature of 60℃ and the loading rate of 20 mm/min,and the slip and shear test condition is recommended accordingly.The slip and shear test of the mineral aggregate shows that the gradation of asphalt mixture and the species and dosage of asphalt have significant effect on EI,the high temperature stability of asphalt pavement can be enhanced significantly by increasing the maximum nominal size appropriately,using modified asphalt and choosing the optimum asphalt-aggregate ratio,etc.