Preparation and properties of pre-treated nano-bentonite incorporated styrene-butadiene-styrene (SBS) modified asphalt

被引：5
作者：
Chen, Shun [1 ,2 ]
Pan, Yingyuan [1 ]
Zhang, Bo [1 ]
He, Xingyang [1 ,2 ]
Su, Ying [1 ,2 ]
Liu, Qiao [1 ]
Wang, Yingjie [1 ]
Wang, Wentian [1 ]
Chen, Jizhan [1 ]
Zhu, Yan [1 ]
Li, Songwei [3 ]
机构：
[1] Hubei Univ Technol, Sch Civil Engn Architecture & Environm, Wuhan 430068, Peoples R China
[2] Bldg Waterproof Engn & Technol Res Ctr Hubei, Wuhan, Peoples R China
[3] China Construct Third Bur First Engn Co LTD, Wuhan, Peoples R China
来源：
CASE STUDIES IN CONSTRUCTION MATERIALS | 2023年 / 19卷
关键词：
Modified asphalt; Grinding; Bentonite; SBS; Mechanical; RHEOLOGICAL PROPERTIES; TENSILE-STRENGTH; CRUMB RUBBER; PERFORMANCE; RESISTANCE; MECHANISM; BINDER; CLAY;
D O I：
10.1016/j.cscm.2023.e02505
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The composite modification method helped improve the viscoelastic properties, aging resistance, and high and low-temperature resistance of asphalt. In this paper, organic modified bentonite (OBT) was successfully prepared by means of liquid phase grinding. The pre-treated OBT was incorporated with styrene-butadiene-styrene (SBS) to prepare modified asphalt (OBTS-MA). It aims at enhancing the properties of composited modified asphalt with new method. After characterizations, the data of three basic indices indicated that the ductility value of OBTS-MA was significantly increased by 210% compared with the asphalt. ATR-FTIR data showed that the carbonyl content of OBTS-MA was markedly lower than that of the asphalt after aging. Nano-indentation and fluorescence microscopy tests revealed that OBT and SBS formed stable structure in OBTS-MA, which significantly optimized the apparent mechanical properties of modified asphalt. This study provided a new idea for optimizing asphalt modification with potential cost-saving and environmentally friendly characteristics. It also performed good prospects and ecological benefits in the future.
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页数：12
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