Journal
CEMENT & CONCRETE COMPOSITES
Volume 68, Issue -, Pages 88-95Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2016.02.013
Keywords
Sewer; Concrete; Corrosion control; Sulfide; Washing
Funding
- Australia Research Council
- Australian water industry [LP0882016]
- University of Queensland
- Chinese Research Council
- Living Allowance Scholarship
- Queensland State Government's Early Career Accelerate Fellowship
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This study systematically investigated the potential of mitigating sulfide induced sewer concrete corrosion by surface washing. Washing interrupted the corrosion activity of concrete coupons by increasing the surface pH and decreasing the H2S uptake rates (SUR). The SUR recovered to the level prior to washing within 60-140 days. The slowest recovery rate was from the most severely corroded coupon. However, no significant difference was observed for concrete mass loss of the washed and unwashed coupons after 54 months. The results suggest that frequent washing at short intervals of a few months might be needed to control corrosion over a long term. (C) 2016 Elsevier Ltd. All rights reserved.
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