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Advances in Civil Engineering
Volume 2018 (2018), Article ID 8907363, 7 pages
https://doi.org/10.1155/2018/8907363
Research Article

Mechanical Properties and Service Life Prediction of Modified Concrete Attacked by Sulfate Corrosion

1School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450001, China
2China Construction Seventh Engineering Division Corp. Ltd., Zhengzhou 450004, China

Correspondence should be addressed to Jin-Jun Guo; nc.ude.uzz@nujnijoug

Received 31 August 2017; Accepted 17 December 2017; Published 13 February 2018

Academic Editor: Song Han

Copyright © 2018 Min Zhang 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 condition of drying and wetting circulation, ordinary concrete, modified concrete containing fly ash, and double-admixture concrete containing fly ash and polypropylene fiber were corroded in the solution of Na2SO4 and (NH4)2SO4. The sulfate concentration of the solution was designed to be 1000 g/L. The compressive strength and splitting tensile strength of the concrete were tested after different number of drying and wetting cycles (0, 2, 4, 6, 8, and 10). The results indicate that the strength of concrete increases in the early stages of corrosion and decreases gradually later. The admixture significantly improves the resistance to sulfate erosion of the modified concrete, while polypropylene fiber plays a less important role on anticorrosion properties. When suffered 10 times of drying and wetting cycle, the compressive strength and splitting tensile strength of modified concrete increase by 28% and 19%, respectively. Based on the test results, the service life of the modified concrete corroded by sulfate was predicted.