湖南大学学报（自然科学版）2017，Vol.44Issue(5)：104-112,9.DOI:10.16339/j.cnki.hdxbzkb.2017.05.013
多聚磷酸改性沥青及其混合料低温性能研究
Study on Low Temperature Performance of Polyphosphoric Acid Modified Asphalt and Asphalt Mixture
摘要
Abstract
Through the conventional low temperature performance test and Superpave low temperature performance test, the structural performance of different polyphosphoric acid(PPA) modified asphalt binder was investigated at low temperature, and the corresponding relationship of its performance evaluation index was analyzed.Further, the anti-cracking performance of asphalt mixture at low temperature was verified by the improved trabecular bending test and TSRST, and the correlation of low temperature performance between the asphalt binder and the mixture was studied.Finally, the rationality and deficiency of the evaluation index of different low temperature performance were analyzed.The results show that PPA reduced the ductility and stiffness modulus of asphalt, and the aging had great influence on the structural performance of PPA modified asphalt at low temperature.The strain energy density index shows that PPA can improve the cracking resistance of asphalt mixture at low temperature, the anti-cracking performance of PPA compound SBR modified asphalt was better than that of SBR modified asphalt, and the freezing temperature and freeze fracture strength can more accurately evaluate the low temperature performance of PPA modified asphalt.关键词
道路工程/多聚磷酸/改性沥青/低温/评价指标Key words
road engineering/polyphosphoric acid/modified asphalt/low temperature/evaluation indexes分类
交通工程引用本文复制引用
刘红瑛,常睿,张铭铭,张振兴,郝培文..多聚磷酸改性沥青及其混合料低温性能研究[J].湖南大学学报（自然科学版）,2017,44(5):104-112,9.基金项目
国家自然科学基金资助项目(51278060),National Natural Science Foundation of China(51278060) （51278060）
