ABSTRACT
In order to study the influence of different artificial sand replacement rates on the compressive strength of RACAS (recycled aggregate concrete with artificial sand), 36 standard test blocks were designed in the experiment. Two strength grades of concrete (C35 and C45) and different replacement rates of artificial sand (0%, 30%, 50%, 70%, and 100%) were considered. The results show that the cubic compressive strength of RACAS is higher than that of natural concrete with the same strength grade, and the increase range is between 7% and 20%. Replacement rates of artificial sand had an effect on the compressive strength. When the replacement rate of artificial sand is about 70%, its cubic compressive strength is lower than those of other replacement rates. Like natural concrete, the compressive strength of RACAS decreases with the increase of water cement ratio.
