In view of the poor water-holding capacity of recycled aggregate concrete,which makes it difficult for plants to grow,the study applied recycled aggregate and brick slag produced by a company to design various mix schemes,including the water-binder ratio,to prepare recycled concrete that utilized the high water retention properties of brick slag.The effects of brick slag content on the compressive strength,pH,porosity,and water retention of concrete were demonstrated in this study.The results indicate that:① the compressive strength of 7 d and 28 d drops by 9％～55.7％and 15％～58.7％when the content of brick slag is increased from 10％to 20％.② Three failure modes of concrete appeared in the experiment are complete failure,local failure,and crack failure.③ When the porosity drops by 3％,the strength increment of the concrete reaches 20.7％to 147.4％.④ The incorporation of brick slag with a content ranging from 10％to 20％can increase the moisture content of recycled aggregate concrete by 18.9％to 41.9％,and can preferably improve the water retention performance of the concrete.⑤ The pH of the concrete ranges from 10 to 11,and the pH slightly rises as the content of brick slag increases from 10％to 20％.
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