Performances of micro-surfacing with waterborne epoxy resin modified emulsified asphalt(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2017年05期
- Page:
- 23-30
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Performances of micro-surfacing with waterborne epoxy resin modified emulsified asphalt
- Author(s):
- JI Jie; LIU Lu-hou; SUO Zhi; XU Ying; YANG Song; XU Shi-fa
- 1. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 2. Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 3. CHECC Highway Maintenance and Test Technology Co., Ltd., Beijing 100089, China
- Keywords:
- road engineering; waterborne epoxy resin; modified emulsified asphalt; micro-surfacing; performance
- PACS:
- U416.217
- DOI:
- -
- Abstract:
- In order to evaluate the performances of micro-surfacing with waterborne epoxy resin modified emulsified asphalt, waterborne epoxy resin modified emulsified asphalt was prepared by the method of emulsification first and then modification. The optimum oil-water ratio, emulsifier content and waterborne epoxy resin content were determined through orthogonal test with three factors and three levels. The 1 h WTAT (wet track abrasion test) and LWT (load wheel test) were conducted on micro-surfacing to measure abrasion values and adhesion sand contents of five groups of different asphalt-aggregate ratios, and the optimum asphalt-aggregate ratio of micro-surfacing was determined by the intersection point which was from curves of abrasion values or adhesion sand contents and the asphalt-aggregate ratios. The 6 h WTAT, the pendulum value test and the seepage test were conducted on micro-surfacing to evaluate the resistance to water damage, skid resistance performance and waterproofness, respectively. Micro-surfacing of water-borne epoxy resin modified emulsified asphalt could be used to fill rutting by the test of wheel rutting deformation, and the rutting resistance of the micro-surfacing was evaluated by the rutting resistance test and overlay rutting test. The results show that the optimum oil-water ratio, emulsifier content and waterborne epoxy resin content of waterborne epoxy resin modified emulsified asphalt are 65:35, 1.4% and 4% (mass fraction, the same below), respectively, and the optimum asphalt aggregate ratio of micro-surfacing is very close to 6.7%. Performance of resistance to water damage of micro-surfacing meets the technical requirements that the abrasion values are not more than 800 g/m2, and the skid resistance performance of micro-surfacing also meets the current technical requirements that the pendulum number is no less than 70 BPN. And it is higher than the technical requirements, which can provide better friction for the traffic. The seepage coefficient of micro-surfacing is zero after rolling, which indicates that waterproof effect is good. Furthermore, the width deformation ratio and rutting depth ratio of micro-surfacing is very small, which can be used for filling the early compaction rutting (can not be used for filling the structural rutting). Micro-surfacing after overlay can significantly improve the high temperature deformation resistance of road and efficiently restore roughness of road.
Last Update: 2017-10-16