Influence of Locally Produced Waterproofing Admixture (Sternson 300) on Concrete Absorption and Strength

ابراهيم, رائد خليل

doi:10.30684/etj.26.2.15

	Influence of Locally Produced Waterproofing Admixture (Sternson 300) on Concrete Absorption and Strength
Engineering and Technology Journal
Article 1, Volume 26, Issue 2, 2008, Pages 49-61 PDF (270.86 K)
DOI: 10.30684/etj.26.2.15
Author
رائد خليل ابراهيم
Abstract
In this work, the influence of waterproofing admixture of stearate type on the water reduction of concrete mix (1:2:4) for a given workability, (50+5)mm slump was investigated. Results indicated that this admixture has a little influence on the water reduction of concrete. Therefore this admixture cannot be considered as a water reducer since it does not conform with the requirements of type (A) admixture in accordance with (ASTM-C494-98 Type A)[1]. The same influence on the compressive strength of concrete (fcu) at various ages (7,28,60 and 90) days was studied. Results showed that the use of this admixture at recommended dose specified by the manufacturer has no significant effect on the compressive strength of concrete. On the other hand, overdoses of this admixture lead to a considerable reduction in the compressive strength. The efficiency of this admixture at different doses in reducing the total water absorption of concrete and the absorption of water by the capillary action was also examined. Results revealed that this admixture is not effective in reducing the water absorption with all doses used in this work and at different ages compared with reference mix without admixture.

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