Carbonation of Concrete Incorporating Fly Ash or a Chemical Admixture

Abstract

Straight portland cement concrete and other concretes containing fly ash or a chemical water reducing agent were investigated for the rate of carbonation. Results have indicated that concretes having the same strength and water/ cement ratio do not necessarily show the same rate of carbonation. For a strength level of 25 mpa, concrete containing fly ash carbonated 50 per cent faster than the straight portland cement concrete (a).