Analysis of Influencing Factors and Evolution Law of Surface Anti-slide Performance of SMA-13 Based on Expressway Physical Engineering

Abstract

Relying on the physical projects of Guangdong Province Chaohui expressway, Wushen expressway Renbo Section and Foqingcong expressway, based on asphalt and asphalt mixture test and on-site SFC test detection, through mathematical statistics, the factors affecting the skid resistance of SMA-13 asphalt mixture are obtained. At the same time, based on the observation of anti-skid performance of SMA-13 asphalt pavement from one year after construction to one year after opening to traffic, the change law of anti-skid performance of SMA-13 asphalt pavement from post-construction, temporary pass, acceptance and opening to traffic is obtained. The research results show that factors such as asphalt binder, mineral aggregate synthesis gradation, different oil-stone ratios and aggregate processing technology are possible factors that affect the anti-skid performance of SMA-13. The early anti-skid performance of SMA-13 asphalt pavement usually cannot meet the acceptance standard of SFC=54. However, the SMA pavement after construction can be spread with 3∼5mm gravel to improve its early anti-skid performance, and the on-site treatment effect is better.