Influencing Factor Research on High-temperature Performance of Asphalt Rubber Mixture

Abstract:

Based on single-factor analysis,rutting test and immersion rutting test were made to study the influencing factors on high-temperature performance of asphalt rubber(AR) mixture.Test results show that crumb rubber modifier (CRM) source,CRM content,asphalt content and air voids have great influence on high-temperature performance of AR mixture,while the effect of base asphalt and CRM size/gradation on high-temperature performance is not so obvious.Though the rutting test results under different aggregate gradations do not show much variation,the gap gradation with less mineral filler and less fine aggregate performs better in immersion rutting test,thus the gap gradation with less mineral filler is suitable for application in asphalt rubber mixture.