Pavement Performance Study Of Asphalt Mixture After Aged

This article started with the pavement performance of asphalt mixture after effect of agingand then high temperature performance, low temperature performance and water stability ofasphalt mixture with four grade of SAC1, SAC2, SAC3and AC13will be studied, moreover,rutting test, low-temperature indirect tensile test and freeze-thaw splitting test of specimens withshort-term aging and long-term aging will be conducted and finally relation models between themeasured data and aging times, different aging methods, different contents of coarse aggregatewill be established, from which we can get the following conclusions after analysis:1. Descending order of anti-rutting performance of four grades of asphalt mixture aftereffect of aging is SAC1> SAC2> SAC3> AC13, AC13> SAC3> SAC2>SAC1for performanceof low-temperature crack resistance, SAC1> AC13> SAC2> SAC3for water stability within4hours of aging but AC13> SAC1> SAC2≈SAC3for it within8hours.2. The complex stability index and relative deformation rate are more reasonable for theevaluation of anti-rutting performance of modified asphalt mixture after effect of aging.3. Specimen of SAC1and SAC2appeared the damage after8hours’ aging but10hours forSAC3and AC13and the specimen with longer time of aging will wreck earlier after subjectingto low temperature and freeze-thaw cycle.4. Specimens with more coarse aggregate will not necessarily lose water stability but it canreduce anti-aging properties of them, which indirectly causes performance of resistance of waterdamage weakened rapidly. Thus, the pros and cons of water stability of these specimens willchange after a certain period of aging.