Study of Pavement Performance of Thin-Coat Waterborne Epoxy Emulsified Asphalt Mixture

被引:14
作者
Cai, Xu [1 ]
Huang, Wenke [1 ]
Liang, Juan [1 ]
Wu, Kuanghuai [1 ]
机构
[1] Guangzhou Univ, Sch Civil Engn, Guangzhou, Peoples R China
来源
FRONTIERS IN MATERIALS | 2020年 / 7卷 / 07期
基金
中国国家自然科学基金;
关键词
waterborne epoxy resin; emulsified asphalt mixture; thin-layer coating; open-graded friction course; road performance; COLD-MIX ASPHALT; BITUMEN EMULSION; CEMENT;
D O I
10.3389/fmats.2020.00088
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Waterborne epoxy emulsified asphalts (WEEA) have high densities, good chemical stabilities, and high viscosities. However, they have problems in terms of overly high stiffness and low-temperature brittleness when applied as thin-coat asphalt mixtures. In this study, testing was conducted to obtain the optimal mixing ratio for WEEA. Anti-sliding, rutting, water stability, Cantabro, and low-temperature bending tests were carried out to evaluate the performance of thin coating layers formed from open graded friction course (OGFC)-5 WEEA mixtures, with the results indicating that the optimal ratio of waterborne epoxy resin emulsion and curing agent was 2:1 and that the dosage of waterborne epoxy resin should be maintained between 15 and 30%. The surface texture depth and British Pendulum Number (BPN) of the OGFC-5 WEEA mixtures were larger than 0.91 mm and 77.4, respectively, and the WEEA mixtures had better water stabilities and spalling resistance performance than a mixture without WEEA. Waterborne epoxy resin dosages of 15 and 30% resulted in WEEA mixture stabilities of up to 4,285 and 8,798 times/mm, respectively, and tensile strengths at -10 degrees C of 2.204 and 4.727 MPa, respectively. The relatively good pavement functional and low-temperature performance of the optimized OGFC-5 WEEA mixture suggest its usefulness as a pavement maintenance material.
引用
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页数:10
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