Improving thermo-rheological behavior and compatibility of SBR modified asphalt by addition of polyphosphoric acid (PPA)

被引：100
|
作者：
Liang, Peng [1 ]
Liang, Ming [1 ]
Fan, Weiyu [1 ]
Zhang, Yuzhen [1 ]
Qian, Chengduo [1 ]
Ren, Shisong [1 ]
机构：
[1] China Univ Petr, State Key Lab Heavy Oil Proc, Qingdao 266580, Shandong, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2017年 / 139卷
关键词：
Modified asphalt; SBR; Polyphosphoric acid (PPA); Rheological property; Compatibility; TEMPERATURE PERFORMANCE; STORAGE STABILITY; COMMERCIAL WAXES; BITUMEN; 160/220; MSCR TEST; BINDERS; MICROSTRUCTURE; MECHANISMS;
D O I：
10.1016/j.conbuildmat.2017.02.065
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
With the aim of improving the compatibility, high and low temperature properties of SBR modified asphalt, polyphosphoric acid (PPA) was added to achieve a further modification in this study. The effects of PPA and asphalt composition on physical properties, viscoelastic behavior, creep and recovery behavior, cracking resistance, compatibility and morphology of PPA/SBR modified asphalt were characterized, respectively. It was demonstrated that PPA dramatically enhanced the adhesion ability, high temperature elasticity and anti-rutting ability of SBR modified asphalt through deflocculation effect. The resistance against low temperature cracking of PPA/SBR modified asphalt underwent a degradation after first improvement as PPA increased. PPA also improved the compatibility between SBR and asphalt and decreased the dispersed polymer phase size, thus a more desirable microstructure was formed. Furthermore, relatively high asphaltene content of base asphalt was beneficial to achieve desired Theological properties of PPA/SBR modified asphalt. As a consequence, chemical reaction with PPA is an effective way to comprehensively improve the compatibility and thermo-rheological behavior of SBR modified asphalt. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：183 / 192
页数：10
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