Crushed sand can be used as fine aggregate only blended with beach sand or river sand because of its angularity. It was ascertained with concrete and mortar that crushed sand with surface configurations improved by the high-quality crushed sand manufacturing system proposed in this study can be used for the entire content of fine aggregate with more or less equal unit water content as when using river sand. It was shown that the amount of bleeding is not increased, and that strength is not decreased with improvement in surface configuration of crushed sand. The high-quality crushed sand manufacturing system for improving the surface configurations of crushed sand consists of a high-quality crushed sand manufacturing machine, crushed sand moisture separation apparatus, and slurry treatment apparatus.
