微波辐射废胶粉改性沥青及混合料性能研究

采用微波辐射的方法对废胶粉表面进行改性活化,用高速剪切工艺在实验室制备了废胶粉改性沥青,基质沥青为泰州中海70号,废胶粉是由南通生产的80目(约0.3 mm),废胶粉掺量为15%。基于包括沥青常规三大指标试验、美国SHRP动态剪切流变试验、弯曲梁流变试验以及热存储稳定性试验等方法,对比分析了微波辐射废胶粉改性沥青和普通废胶粉改性沥青的性能;同时利用沥青混合料常规试验方法,研究了两种改性沥青混合料的路用性能。结果表明,微波辐射废胶粉改性沥青的高温性能、低温性能、抗老化性能和存储稳定性能均好于普通废胶粉改性沥青;微波辐射废胶粉改性沥青混合料的高温稳定性能、水稳定性能均好于普通废胶粉改性沥青混合料。

Research on Performance of Microwave Radiation CRM Asphalt and Its Mixture

Microwave radiation is adopted to activate the surface of the crumb rubber powder.The crumb rubber modified asphalt(CRM asphalt) is made in laboratory by using a high-speed shearing process,the matrix asphalt is Taizhou Zhonghai 70# and the crumb rubber powder with a content of 15% is made in Nantong whose diameter is 80 meshes(about 0.3 mm).On the basis of the asphalt conventional three indexes,DSR test,BBR test,and hot storage stability test etc,analyzing and comparing the performance of the microwave radiation CRM(MRCRM) asphalt and the ordinary CRM asphalt;meanwhile based on the conventional asphalt mixture testing method the pavement performance of the two modified asphalt mixtures is studied.The results show that the MRCRM asphalt is better than the CRM asphalt in terms of the high-temperature stability,low temperature performance,anti-fatigue and hot storage stability.And also the MRCRM mixture is better than the ordinary CRM mixture in terms of the high-temperature stability and water stability.