Title of article
Effect of potassium-chromate and sodium-nitrite on concrete steel-rebar degradation in sulphate and saline media
Author/Authors
Okeniyi، نويسنده , , Joshua Olusegun and Omotosho، نويسنده , , Olugbenga Adeshola and Ajayi، نويسنده , , Oluseyi Olanrewaju and Loto، نويسنده , , Cleophas Akintoye، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2014
Pages
9
From page
448
To page
456
Abstract
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.
Keywords
Concrete steel-rebar , Potassium-chromate and sodium-nitrite inhibitors , Microbial/marine-simulating environments , Normal and Weibull distributions , Kolmogorov–Smirnov statistics , Compressive strength of concrete
Journal title
Construction and Building Materials
Serial Year
2014
Journal title
Construction and Building Materials
Record number
1635696
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