Effects of Water-Cement Ratio on Concrete Sulfate Corrosion Rate

Abstract:

Water-cement (w/c) ratio is an important parameter in concrete mix ratio design, which also plays an important influence on concrete sulfate corrosion rate. In this paper, concrete cubic specimens with w/c of ratio as 0.4, 0.5 and 0.6 were fabricated, respectively, and put into 10% Na₂SO₄ solution and tap water for 240 days. During the submerging process, superficial corrosion phenomena were observed and concrete cubic strengths were measured periodically. The results showed that the lower the w/c ratio, the stronger the concrete sulfate corrosion resistance is. At the same time, concrete with lower w/c ratio always correspond smaller corrosion layer thickness. Based on the degradation of cubic compressive strength of corroded concrete specimens, the development models of corrosion thickness of each w/c ratio concrete are established as sulfate corrosion goes on

• Periodical: Key Engineering Materials (Volume 711)
• Pages: 295-301
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.711.295
• Online since: September 2016
• Authors: Jian Min Du*, Xiao Li Han, Zai Ting Li, Guo Li, Yong Sheng Ji
• Keywords: Concrete, Corrosion Thickness, Sulfate Corrosion, Water-Cement Ratio

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