摘要
Carbide slag was used as an activator to improve the activity of anhydrous phosphogypsum.Carbide slag could greatly improve the mechanical strength of anhydrous phosphogypsum than K_(2)SO_(4).The compressive strength of 11 wt%carbide slag and 1 wt%K_(2)SO_(4)activated anhydrous phosphogypsum increased greatly to 8.6 MPa at 3 d,and 11.9 MPa at 7 d,and 16.0 MPa at 28 d,respectively.The rate of hydration heat was accelerated and the total hydration heat was increased,and more calcium sulfate dihydrate was formed and cross-linked with other parts which improved the compressive strength of anhydrous phosphogypsum under the effects of different activators.It was indicated that carbide slag was a highly effective and cost-efficient activator.The result provides a highly effective and low-cost method which results in a novel and high value-added method for the utilization of phosphogypsum in the future.
作者
CHEN Shun
XIONG Guoqing
SU Ying
HE Xingyang
XIE Yunxuan
WANG Yunfeng
GONG Minhua
陈顺;XIONG Guoqing;苏英;HE Xingyang;XIE Yunxuan;WANG Yunfeng;GONG Minhua(School of Civil Engineering,Architecture and Environment,Hubei University of Technology,Wuhan 430068,China;Building Water-proof Engineering and Technology Research Center of Hubei Province,Hubei University of Technology,Wuhan 430070,China;Hubei Jinlu Energy Saving Co.,Ltd,Huangshi 435000,China)
基金
Funded by Innovation Group Fund Project of Hubei Province(No.2020CFA039)
the Key Research and Development Program of Hubei Province(No.2020BCA077)。
