Research on the Fatigue Behavior of Cement Asphalt Mortar Exposed to Water

Author:

Wang Fa Zhou1,Yang Jin1,Hu Shu Guang1,Zhang Yun Hua1,Liu Yun Peng1

Affiliation:

1. Wuhan University of Technology

Abstract

Water erosion is one of the major factors for performance degradation of cement asphalt mortar (abbreviated to CA mortar, or CAM). In this paper, the influence of gap depth, coupling effect of water and pressure on the fatigue behavior of CA mortar was investigated. Results indicated that the damage of bonding surface became more seriously with the increase of gap depth, and when the gap depth was 19 to 38% of the structure size, the destruction exacerbated. Results also indicated that CA mortar was damaged more seriously under the coupling effect of water and pressure; the destruction first occurred on the surface between slab track and CA mortar rather than that between concrete roadbed and CA mortar. Timely repair with epoxy resin prevented the further water erosion well, and improved the service life of CA mortar.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Reference6 articles.

1. Yutaka Harada, Seiichi Tottori, and Noriyuki Itai: Quart. Rep. RTRI (Railway Technical Research Institute) (Japan) Vol. 15 (1983), p.62.

2. Harada Y. Development of ultrarapid-hardening cement-asphalt mortar for grouted-ballast track structure. Quarterly Report of the RTRI (Railway Technical Research Institute), 1976, 17, No. 1, 6-11.

3. Zuo J., Jiang Q. and Fu D. Research on CA mortar in slab track. Railway Construction, 2005, No. 9, 96–98 (in Chinese).

4. WANG Fa-zhou, LIU Zhi-chao. Research on the fatigue behavior of CA mortar used in ballastless slab track of high-speed railway. Journal of Wuhan University of Technology, 2008, NO. 11, 79-81 (in Chinese).

5. ZHAO Ping-rui, LIU Xue-yi. Dynamic performance analysis and parametric studies of the slab track. Railway Construction, 2004, NO. 5, 48-50 (in Chinese).

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