期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 50, 期 -, 页码 448-456出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2013.09.063
关键词
Concrete steel-rebar; Potassium-chromate and sodium-nitrite inhibitors; Microbial/marine-simulating environments; Normal and Weibull distributions; Kolmogorov-Smirnov statistics; Compressive strength of concrete
In this paper, effect of potassium-chromate (K2CrO4) and sodium-nitrite (NaNO2) on concrete steel-rebar degradation in sulphuric-acid and in sodium-chloride media were studied. Electrochemical monitoring of open circuit potential and compressive strength effect of the different concentrations of these admixtures in steel-reinforced concretes immersed in the acidic/marine-simulating environments were analysed for detailing admixture performance. Results subjected to ASTM C876 interpretations showed that concrete admixed with 0.145 M potassium-chromate exhibited optimum inhibition effectiveness with good compressive strength improvement in the acidic medium. In the saline medium, the concrete admixed with 0.679 M sodium-nitrite exhibited optimal inhibition performance, but with reduction in concrete compressive strength. (C) 2013 Elsevier Ltd. All rights reserved.
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