was slightly larger than that of natural aggregate concrete
depending on transport distances and types. In addition, Marie and
Quiasrawi (2012) reported that the use of up to 20% replacement of
natural aggregate with recycled concrete aggregate allowed the
production of acceptable quality concretes while maintaining the
sustainability of natural resources and environment. Ping and
Yidong (2011) thus suggest that the recycled aggregate concrete
is a good eco-material.