Ecological and economic aspects of the impact of the type of coarse aggregate on strength properties of concrete

Abstract

Solution proposed by authors of this paper is to change the type of coarse aggregate into the aggregate of higher quality in order to achieve better strength for a given concrete with a specifi c quantitative composition. Concrete classifi ed in 3 groups was subjected to test: ordinary concrete of w/c = 0,70 and w/c = 0,58, and also high strength concrete of w/c = 0,28. In each group concrete was made using four different types of coarse aggregate. Comparing test results of strength properties it should be stressed that there is a signifi cant effect of coarse aggregate on the values obtained, as confi rmed by a statistical analysis. One can look for “concrete strength” in other sources than those consisting in a unit increase of cement content, through as shown, an appropriate choice of the type of coarse aggregate.