Mechanical properties of recycled aggregate concrete with deformed steel re-bar

Abstract

This study investigates fundamental properties of the recycled aggregate which was produced through recent hi-technique of recycling. In addition, the mechanical properties of the concrete that was made by the recycled aggregate were compared to the concrete made of natural aggregate. The primary objective of this study was to characterize the concrete-rebar bonding properties of the recycled aggregate concrete.The recycled aggregate concrete showed about 18% decreased bond strength as compared to the natural aggregate concrete. The current prediction equation of bond strength suggested by the design specification does not consider this decreased bond strength by the use of the recycled aggregate. Therefore, this study suggests an equation for predicting the bond strength for the recycled aggregate concrete considering the recycled aggregate replacement ratio and consequent compressive strength reduction.