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    Evaluation of Various Modification Methods for Enhancing the Performance of Recycled Concrete Aggregate

    Xiaoyan Liu1,*, Li Liu1, Junqing Zuo2, Pingzhong Zhao1, Xian Xie1, Shijie Li1, Kai Lyu3,*, Chunying Wu4, Surendra P. Shah5

    Journal of Renewable Materials, Vol.10, No.10, pp. 2685-2698, 2022, DOI:10.32604/jrm.2022.019527

    Abstract Due to the existence of the attached mortar, the performance of the recycled concrete aggregate (RCA) is inferior to the natural aggregate, which significantly limits its wide application in industry. In this study, five kinds of modified solutions were used to modify the surface of RCA, and the modification effects were compared. The results showed that sodium silicate, nano-silica (NS), Bacillus pasteurii and soybean powder had relatively good modification effects on RCA, which could reduce the crushing value and water absorption, and increase apparent density. The composite solution (15% sodium silicate and 2% NS) and soybean powder solution had better… More >

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