Abstract: In order to clarify the status quo of polyphosphoric-acid (PPA)-modified asphalt, the modified mechanisms of PPA on the aspects are systematically elucidated. The preparation processes of PPA modified asphalt are summarized, the effect laws of PPA on the pavement performance of asphalt binders are investigated, and the development directions of PPA modified asphalt are discussed. The shortcomings of previous researches on modified mechanism and preparation technology are the two main factors which restrict the application of PPA modified asphalt in China. The addition of PPA to asphalt can effectively improve the high temperature performance and anti-aging ability, while the impact of PPA on the moisture susceptibility of asphalt depends on many factors, for instance, the source of aggregates and asphalts. Nevertheless, the effect of PPA on the low temperature performance and fatigue resistance of asphalt has no final conclusions.
刘祥, 张正伟, 杨小龙, 邹晓龙. 多聚磷酸改性沥青研究现状及展望*[J]. 《材料导报》期刊社, 2017, 31(19): 104-111.
LIU Xiang, ZHANG Zhengwei, YANG Xiaolong, ZOU Xiaolong. Status Quo and Future Prospect of Polyphosphoric-acid-modified Asphalt. Materials Reports, 2017, 31(19): 104-111.
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