Prise en compte des additions minérales dans le calcul des résistances de mortiers

Abstract

In the first part, the definition and the methods for estimating the coefficient of activity of a mineral filler are presented. The calculation relies on predictive laws of strength, here Bolomey's and Feret's laws. In the second part, experimental results concerning the strength of mortars allow us to calculate the coefficient of activity of a fly ash. It is shown that it is not realistic to characterise the activity of the fly ash by a unique coefficient because the strength of mortars is not accordant with a linear law of the substitution ratio. Therefore, it is necessary to evaluate the coefficient of activity as a function of the substitution ratio.