Study on the rheological properties and mechanism of polyphosphoric acid modified asphalt

被引：0
|
作者：
Liu H. [1 ]
Zhang Z. [1 ]
Chang R. [1 ]
Hao P. [1 ]
机构：
[1] Key Laboratory for Road Structure and Material of MOC, Chang'an University, Xi'an
来源：
Hao, Peiwen (gl02@chd.edu.cn) | 1880年 / Science Press卷 / 44期
关键词：
Modified asphalt; Modified mechanism; Poly phosphoric acid; Rheological properties; Road engineering;
D O I：
10.11908/j.issn.0253-374x.2016.12.011
中图分类号：
学科分类号：
摘要：
Through dynamic shear rheological (DSR), repeated creep and recovery teat (RCRT) and bending beam rheological (BBR) test, the rheological behavior of polyphosphoric acid (PPA) modified asphalt, polymer modified asphalt and polymer mixed PPA modified asphalt at different temperature were comprehensively studied. The results show that the PPA additive can improve performances of matrix asphalt and polymer modified asphalt at the high and low temperature. The modification mechanism had more different performance between PPA and SBS modified asphalt at high temperature, and PPA using can significantly increase the viscosity of asphalt, and PPA has less influence on the elastic deformation recovery ability of asphalt, but SBS can greatly improve the elastic recovery of asphalt. The modification mechanism of PPA modified asphalt was analyzed by nuclear magnetic resonance (NMR) test, and the results show grafting, phosphating and cyclization reactions are happened between asphalt and PPA, which changes the carbon chain structure and chemical structure of asphalt, and asphalt become more viscosity. © 2016, Editorial Department of Journal of Tongji University. All right reserved.
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页码：1880 / 1888
页数：8
相关论文
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