In this study, the main properties of concrete using recycled coarse aggregate and reclaimed coarse aggregate were examined in laboratory experiments. Two types of binder were evaluated which comprised either an equivalent to portland blast-furnace slag cement Type C or Type B. As a result, it was indicated that while reclaimed coarse aggregate exerted a negligible effect on concrete characteristics, the impact of recycled coarse aggregate was more significant, increasing with its mixing ratio. Additionally, it was confirmed that it is necessary to pre-check the total alkali content and chloride ion content prior to the utilization of these aggregates.
Satoshi Inoue (Thu,) studied this question.