Research Article | OPEN ACCESS
Concrete Deterioration under Alternate Action of Carbonation and Sulfate Attack
Fenglan Li, Changyong Li, Shunbo Zhao and Changcheng Shi
School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou, P.R. China
Research Journal of Applied Sciences, Engineering and Technology 2013 20:3736-3740
Received: December 31, 2012 | Accepted: January 31, 2013 | Published: November 10, 2013
Abstract
By micro- and macro-observations, the study reveals the deterioration mechanisms of concrete under alternate action of carbonation and sodium sulfate solution attack (C-SA) comparied with the single sodium sulfate solution attack (SA). The studies indicate that in both cases, the main attack product is ettringite, some gypsum is checked only in the first layer of case SA, the thaumasite form of sulfate attack is not initiated in case C-SA. Compared with the single sodium sulfate solution attack, although the carbonation layer mitigates the extent of sulfate attack in limited exposure period, the alternate action of carbonation and sulfate attack still leads to strength degradation to some extent. The effect of carbonation on sulfate attack for longer exposure period deserves further research.
Keywords:
Attack product, concrete, carbonation, strength, sulfate, sulfate-ion content,
Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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