Influence of air-entraining admixture on strength development of cement composites containing fly ash addition

Abstract

The results of laboratory investigation concerning the influence of the air-entraining admixturecontent [i]d[/i]/[i]C[/i], the [i]W[/i]/[i]C[/i] ratio, and the time of curing[i] τ[/i] on the compressive strength [i]f[sub]c[/sub][/i] of cement mortarssamples are presented in the paper. On the basis of the results, a mathematical model was elaborated.The character and the influence grade of each factor were analyzed. It was determined that with increasein the content of air-entraining admixture, the compressive strength of cement mortars containingfly ash decreases. However, there is a limiting dosage of the admixture above which the increase in itscontent does not cause the decrease in the strength.[b]Keywords[/b]: civil engineering, cement composites, air-entraining admixture, fly ash, mathematicalmodel

Keywords

• budownictwo
• kompozyty cementowe
• napowietrzanie
• popiół lotny
• model matematyczny