Study on the technology of strengthening concrete by impregnation with modified sodium silicate compound strengthening fluidYang Dishan, Yan Tongyu, Huang Xiaoyu, Xiong Ying, Lin Xi, Zhou Hong and Shi JianguangE3S Web Conf., 293 (2021) 02021DOI: https://doi.org/10.1051/e3sconf/202129302021