Durability of compound waterborne epoxy emulsified
asphalt microsurfacing
(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2020年1期
- Page:
- 68-76
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Durability of compound waterborne epoxy emulsified
asphalt microsurfacing
- Author(s):
- ZHENG Mulian1; FAN Xianpeng1; LIU Fuqiang1; LI Hongyin2; LIN Xiaoyu1
- 1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Changan University,
Xian 710064, Shaanxi, China; 2. Qilu Transportation Development
Group Co. Ltd., Jinan 250101, Shandong, China
- Keywords:
- road engineering; durability; waterborne epoxy emulsified asphalt; accelerated wear; composite modification; microsurfacing
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to solve the problem of frequent early diseases on the microsurfacing of asphalt pavements, waterborne epoxy resin (WER) and styrene butadiene rubber (SBR) latex were used in the composite modification of emulsified asphalt to prepare a compositemodified waterborne epoxy emulsified asphalt microsurfacing. The asphalt was verified through three main indexes and adhesion properties. The water stability, abrasion resistance, and slip resistance of the mixture were taken as the evaluation criteria. The durability of the microsurfacing mixture under different waterborne epoxy resin contents was evaluated by the longterm immersion wet track abrasion test, multiple freezingthawing cycle wet track abrasion test (WTAT) and fourwheel accelerated abrasion test, respectively, and compared with SBR modified emulsified asphalt microsurfacing. The results show that composite modification significantly improve the highand lowtemperature performance and adhesion performance of the emulsified asphalt. The microsurfacing mixture also has better durability than ordinary SBR modified emulsified asphalt microsurfacing. The WTAT values do not increase significantly under the conditions of long immersion time and multiple freezingthawing cycles, and it has good water stability. The wear resistance can be maintained at a higher level during 15 000 times of accelerated wear, and the rate of decline of antislip performance is lower than that of SBR microsurfacing. When the waterborne epoxy resin content is increased to 8%, the durability of the composite modified microsurfacing continuously improves, the attenuation rate of various properties gradually slow down during the test. When the waterborne epoxy resin content exceed 8%, the improvement of durability at microsurface is no longer obvious, hence, the waterborne epoxy resin content should not exceed 8%.
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Last Update: 2020-01-17