Study on the compensating calcium ion method for existing concrete based on crystal infiltration waterproof materialsYang Dishan, Yan Tongyu, Lin Yubin, Li Jiyu, Ruan Xiaofei, Zhou Hong and Shi JianguangE3S Web Conf., 293 (2021) 02059DOI: https://doi.org/10.1051/e3sconf/202129302059