Comparative study of ideal and inadequate coarse aggregate on the mechanical properties of concrete

Abstract

The purpose of this study was to produce concrete with ideal coarse aggregate and compare it to concrete made with inadequate aggregate.Assess the influence of inappropriate aggregate on concrete properties.The concretes produced with Blade aggregate presented an elasticity module superior to the concrete with cubic aggregate, demonstrating greater elasticity in the concrete and, in the tensile strength, they presented better performance in the first ages. For fresh concrete and compressive strength, the cubic shape performed better.The cubical shape, considered ideal, has length/thickness <18 mm and width/thickness <18 mm; the blade shape, considered inadequate, has length/thickness >30 mm and width/thickness >30 mm. The physical properties of ideal coarse aggregate and inadequate aggregate were compared after separation and classification for concrete production and subsequent analysis of workability, compressive strength, tensile strength and modulus of elasticity of the resulting concrete. The goal was to assess the influence of ideal and inadequate coarse aggregate in different situations: dry material content, binder content, w/c ratio and concrete strength.