1. School of Materials Science and EngineeringSouthwest Petroleum University Chengdu Sichuan 610500 China
2. State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum University Chengdu Sichuan 610500 China
3. Engineering Technology Research Center of High Performance Water Reducing Agent for ConcreteChang'An Yucai Building Materials Co. Ltd. Shijiazhuang Hebei 051430 China