AUTHOR=Chen Kehan , Zhu Zhaoyue , Xue Tao , Zhang Heng , Wang Anyang , He Rui , Yang Hao , Wang Yufei TITLE=Enhancement Treatment of Recycled Concrete Aggregate JOURNAL=Frontiers in Built Environment VOLUME=7 YEAR=2021 URL=https://www.frontiersin.org/journals/built-environment/articles/10.3389/fbuil.2021.739148 DOI=10.3389/fbuil.2021.739148 ISSN=2297-3362