2006 Volume 12 Issue 23 Pages 11-14
This paper presents the results of a series of experimental study on the water reducing and quality-improving effects of fly ash on concrete with higher water content. Concrete mixes with slump of 12cm to 21cm, containing ordinary portland cement with and without 25% fly ash replacement, river sand and mixed sand, an air-entraining and water-reducing agent and an air-entraining and high range water-reducing agent, were tested for slump, compressive strength, drying shrinkage and carbonation. The experimental results indicated the remarkable improving effects of fly ash on reducing effects both in water content and drying shrinkage.
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