Study of Properties of Modified Aqueous Epoxy Mortar Used in Rehabilitation of Tunnel Concrete Cracks

doi:10.3973.j/issn.1672-741X.2016.04.005

Tunnel Construction ›› 2016, Vol. 36 ›› Issue (4): 398-402.DOI: 10.3973.j/issn.1672-741X.2016.04.005

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Study of Properties of Modified Aqueous Epoxy Mortar Used in Rehabilitation of Tunnel Concrete Cracks

JU Xiangwei¹, PENG Hailong², GAO Peiwei^1，*, YAO Yingzheng³, MA Aiqun¹, ZHANG Jun¹

(1. Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China; 2. Shanxi Provincial Transportation Planning, Survey and Design Institute, Taiyuan 030012, Shanxi, China; 3. Wuxi Metro Group Co., Ltd., Wuxi 214000, Jiangsu, China)

Received:2015-06-29 Revised:2016-01-20 Online:2016-04-20 Published:2016-04-27

Abstract

Abstract:

A kind of modified aqueous epoxy mortar with high performance and high bond strength for rehabilitation of tunnel segment cracks is developed. The properties of the mortar, including flexural strength, compressive strength and bond strength, are studied; then the microstructure of the mortar is analyzed by means of scanning electron microscope (SEM) method. The testing results show that: 1) The flexural strength and compressive strength increase with the polymercement ratio increases; and then they decrease at a peak. 2) The bond strength decreases with the polymercement ratio increases. 3) Compared to the traditional mortar, the bond strength of modified mortar increases by 20%-40%.

Key words: segment rehabilitation, modified mortar, bond strength, microcosmic analysis, tunnel crack

CLC Number:

U 45

JU Xiangwei, PENG Hailong, GAO Peiwei, YAO Yingzheng, MA Aiqun, ZHANG Jun. Study of Properties of Modified Aqueous Epoxy Mortar Used in Rehabilitation of Tunnel Concrete Cracks[J]. Tunnel Construction, 2016, 36(4): 398-402.

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Study of Properties of Modified Aqueous Epoxy Mortar Used in Rehabilitation of Tunnel Concrete Cracks

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