Indoor Characterization of Asphalt Pavement Aging and Performance Testing of Surface Reinforcement Materials
In order to solve the problem of difficult indoor characterization of asphalt pavement aging,the lifting effect of ultra-thin wearing layer surface treatment on improving the road performance of old asphalt pavement was studied.An asphalt mixture accelerated aging by oven was developed,whose aging level was characterized by a splitting test;At the same time,a method for surface enhancement treatment of specimens by a Universal Testing Machine(UTM)was proposed.The mechanical properties changes of the specimens before and after treatment were analyzed by the combination of UTM and the splitting test data.The research results show that:1)In the oven accelerated aging test at a temperature of 150 ℃,the performance of the specimen with an aging time of 6 h is close to that of the pavement core sample;2)The ultra-thin wearing layer surface enhancement treatment method effectively improves the deformation ability of the pavement surface layer.The excellent water damage resistance can effectively avoid the occurrence of early cracks;3)The method solves the problems of difficult pavement coring and insufficient core samples to provide a basic and practical test materials for indoor testing;4)The surface enhancement treatment methods further improves the consistency between indoor testing and on-site preventive maintenance construction of pavement.The research are of great significance to the pavement materials research and engineering design.
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