| Popis: |
Asphalt rubber mixture is often described as an environmentally friendly mixture due to its usage of recycled rubber gotten from used tires and the subsequent improved service life. It has been established that adding SBS to rubber asphalt can further improve the performance of rubber asphalt mixture. In order to evaluate the performance improvement of the asphalt rubber mixture, several related high temperature performance and mechanical properties tests were conducted. The influence trend was obtained and evaluated based on the analysis of dynamic stability, relative deformation, and shear strength. For both SMA-13 and SMA-16 mixture, CR/SBS composite modified asphalt had better high temperature performances than asphalt rubber, but worse than SBS asphalt. In addition, the CR/SBS composite modified asphalt had larger internal friction angle, which could give better cohesive force for aggregate gradation. Moreover, it provided a wider range of applications for asphalt rubber mixture in road construction, which realized the waste cyclic utilization and environmental protection. |
