Effects of a Locally Sourced Water Reducing/Retarding Admixture on Concrete

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Effects of a Locally Sourced Water Reducing/Retarding Admixture on Concrete

Original Article, B30
Oladiran A, Aderinlewo, Tanimola M.
Journal. Civil Eng. Urban. 2(5): 170-175. 2012.

ABSTRACT:The results of experiments to determine the effects of a water reducing/retarding admixture locally sourced from orange tree leaves on concrete are presented in this paper. The admixture was added to the concrete mix in percentages of 1, 2, 5, 10 and 15 by weight of cement. The results showed that the workability of the mix improved while the water cement ratio reduced gradually as the admixture content was increased from 1% to 15%. Cube crushing tests performed showed that the 28th day compressive strengths of the concrete increased considerably as the admixture content increased from 1% to2% up to 5% beyond that of the control. Thereafter, the compressive strengths dropped at 10% and 15% admixture contents. The percentage increase in compressive strengths of the concrete with 1%, 2% and 5% admixture contents were 6.58%, 14.07% and 23.53% respectively above that of the control.
Keywords:water reducing, retarding, admixture, workability, crushing tests, compressive strengths.

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