摘要
Abstract
To explore the influence of polyphosphate(PPA)on SBS composite modified asphalt and mixture properties,this study was based on DSR and BBR experiments to analyze the high and low temperature rheological properties of PPA/SBS composite modified asphalt.Then,the high temperature performance,low temperature performance,and water stability performance of PPA/SBS composite modified asphalt mixture were systematically evaluated through rutting test,small beam bending test,immersion Marshall test,and freeze-thaw splitting test.The results indicate that an appropriate amount of PPA can significantly enhance the high-temperature rheological properties of modified asphalt binder,but weaken its low-temperature rheological properties;Suitable PPA content can enhance the high-temperature anti rutting performance of asphalt mixtures,but it will have a certain impact on their low-temperature crack resistance and water stability.The PPA content should be selected as 1.6%.关键词
改性沥青/PPA/SBS/流变性能/路用性能Key words
modified asphalt/PPA/SBS/rheological properties/pavement performance分类
交通运输
