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Advances in Materials Science and Engineering
Volume 2018, Article ID 3038685, 12 pages
https://doi.org/10.1155/2018/3038685
Research Article

Service Life Prediction of Shaft Sidewall Exposed to Sulfate Environment

1Department of Civil Engineering, Tsinghua University, Beijing 100084, China
2Architectural Design and Research Institute of Tsinghua University Co., Ltd., Beijing 100084, China
3School of Civil Engineering, Sun Yat-sen University, Guangzhou 510006, China

Correspondence should be addressed to Ji-hui Zhao; moc.361@423iuhijoahz

Received 18 February 2018; Revised 16 May 2018; Accepted 6 June 2018; Published 3 July 2018

Academic Editor: Yuanshi Li

Copyright © 2018 Wei He et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Under the influence of underground water with high concentration of sulfate, several vertical shafts in the Huang-Huai region are seriously corroded but have varying degradation degrees in different parts. Taking the auxiliary shaft of Lin-Huan coal mine as the research subject, the mechanism of this phenomenon was studied. Then, wet-dry alternated and immersion corrosion tests were carried out, and it was found that only the dry-wet alternated accelerate test is representative of the corrosion mechanism that cause the corrosion in the shaft. However, it will cost much time and money for the laboratory test to reach the same degradation depth. To solve this problem, combining with field and laboratory tests, a modified theoretical degradation model was developed to evaluate the residual life of the corroded sidewall. The results indicate that the residual life of the shaft sidewall is 25 years, and the damaged parts have no need for an immediate reinforcement.