Study of local Tint Defects on Concrete Surfaces-Influence of Superplasticizers and Other Parameters

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Title: Study of local Tint Defects on Concrete Surfaces-Influence of Superplasticizers and Other Parameters

Author(s): I. Lallemant, P. Rougeau, J. L. Gallias, and R. Cabrillac

Publication: Special Publication

Volume: 195

Issue:

Appears on pages(s): 521-534

Keywords: adsorption; concrete; superplasticizer

Date: 7/1/2000

Abstract:
The results presented and discussed are those of a study aimed at understanding how and why tint heterogeneities occur at the surface of concrete. In particular, the study involved laboratory tests on mortars which were aimed at examining the effect of the following parameters on the phenomenon of tint heterogeneity: W/C, super-plasticizer content, cement alkali content, mould type, and curing conditions. The results appear to show that two of the parameters aforementioned have a major influence on tint homogeneity: the homogeneity of the binder volume fraction distribution resulting from the use of super-plasticizers, and the absorption properties of the mould.