Effects of density and strength on dynamic modulus of elasticity for self-compacting rubberized concrete containing recycled brick aggregate

Abstract

The aim of this study is to evaluate the mechanical properties of self-compacting concrete (SCC) containing two types of brick aggregate (discarded and demolition brick aggregate) with a 100% replacement of both fine and coarse natural aggregates, besides incorporation of 10% tire crumb rubber as a replacement by volume of fine aggregate. Slump flow was evaluated for fresh state. Density, ultrasonic velocity (UPV), compressive strength, and dynamic modulus of elasticity were measured at 28, 56 and 90 days. The results showed significantly reductions in densities and UPV depending on the aggregate type and presence of rubber. Likewise, the dynamic modulus of elasticity decreased up to 63.2% at 90 days by inclusion of brick aggregate and by 22% with the rubber incorporation. A proposed equation to estimate dynamic modulus of elasticity at late ages was introduced with reasonable error and comparable values with experimental data obtained in this study.