Umudike Journal of Engineering and Technology

Michael Okpara University of Agriculture, Umudike


EFFECT OF SULPHATE IMPURITIES ON COMPRESSIVE STRENGTH OF CONCRETE

Abarikwu, O. I.
Department of Agricultural and Bioresources Engineering, Michael Okpara University of Agriculture, Umudike

Effiong, A. A.
Department of Agricultural and Bioresources Engineering, Michael Okpara University of Agriculture, Umudike



ABSTRACT

Failure of structures has become very rampant today in Nigeria, and impurities or unsoundness of construction materials, could be a contributory factor. In this study, an attempt is made to determine the effect of different levels of impurities of magnesium sulphate, on the compressive strength of concrete. The major raw material is locally manufactured cement called UNICEM. The study is proactive in nature to prevent structural failure. Magnesium sulphate (impurities), are introduced at four concentration levels in the mix water for concrete, with a zero impurity as the control. A mix design of 0.6:1:2:4 is used, and the concrete cubes are prepared. The compressive strength of the cubes is determined at 3, 7, 14 and 28 days. The results show appreciable decrease in concrete compressive strength of 31% and 37% respectively at impurity levels of 2730mg/l and 3640mg/l from the strength of the control, which could result in structural failure. Recommendations are made for attaining acceptable compressive strength at the levels of impurity to avoid failure in the strength of concrete made with UNICEM cement.



Keywords: Concrete, Impurity, Compressive Strength and Magnesium Sulphate


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Published
Wednesday, December 28, 2016

Issue
Vol. 2 No. 2, DEC 2016

Article Section
GENERAL

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