This report summarises work carried out by BRANZ investigating the effect of including recycled concrete aggregate in new concrete. It also considers the findings of other testing carried out overseas.
It concludes that concretes made with recycled concrete aggregates may have reduced compressive, tensile splitting and flexural tensile strengths and increased drying shrinkage.
It also concludes that such recycled aggregate concrete, made with good quality, clean recycled concrete aggregates, would be suitable for use in non-structural applications such as driveways and footpaths.