J. Okeniyi, O. Omotosho, O. Ajayi
Jan 15, 2014
Citations
2
Influential Citations
72
Citations
Quality indicators
Journal
Construction and Building Materials
Abstract
Abstract In this paper, effect of potassium-chromate (K 2 CrO 4 ) and sodium-nitrite (NaNO 2 ) 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.