2015
DOI: 10.21275/v4i12.nov152049
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The Effect of Using Commercial Red and Black Iron Oxides as a Concrete Admixtures on its Physiochemical and Mechanical Properties

Abstract: Study discuss the effect of using commercial red and black iron oxides (RIO and BIO) as a concrete admixtures in percentages do not exceeded 2.5% of each oxide from the amount of cement, this study tested the effect of every portion from each oxide at different ages on the compressive strength as well as the workability represented as a values of slump. We conclude that the optimum portion of RIO is 2.5%, but for BIO is 1%, while the proposed uses of RIO in concrete technology are retarder through slump increm… Show more

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“…However, at 90 days, the compressive strength of the MC1 group is closer to that of the RC1 mixture, indicating that the EMD waste material may have some effect on the strength development of concrete in sulfate solution. The latter observation is attributed to the existence of MnO 2 and ferrous oxides that occupy the pores and influence the cement's hydration process [61,62]. Nevertheless, the decrease in compressive strength was affected by the presence of sulfate ions in the additive, which have an adverse effect on the mechanical properties of concrete [63].…”
Section: Resultsmentioning
confidence: 99%
“…However, at 90 days, the compressive strength of the MC1 group is closer to that of the RC1 mixture, indicating that the EMD waste material may have some effect on the strength development of concrete in sulfate solution. The latter observation is attributed to the existence of MnO 2 and ferrous oxides that occupy the pores and influence the cement's hydration process [61,62]. Nevertheless, the decrease in compressive strength was affected by the presence of sulfate ions in the additive, which have an adverse effect on the mechanical properties of concrete [63].…”
Section: Resultsmentioning
confidence: 99%