Mechanism of Calcined Phosphogypsum for the Volume Change of Blended Cement

作     者：杨志明 YANG Zhiming, BAI Jianfei, GUAN Shaobo, LI Xiangguo ( Guangxi Building Materials Scientific Research and Design Institute, Nanning 530022, China;Development of Real Estate of Group of Steel Wuhan Co. Ltd, Wuhan 430080, China;Key Laboratory for Silicate Materials Science and Engineering (Ministry of Education), Wuhan University of Technology, Wuhan 430070, China)

作者机构：Guangxi Building Materials Scientific Research and Design Institute Nanning 530022 China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2006年第21卷第Z1期

页      面：147-151页

学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 

基　　金：Funded by the National Hi-Tech Research and Development Program ("863" Project) of China (No. 2005AA332010) 

主　　题：calcined phosphogypsum steel slag high calcium fly ash volume change 

摘      要：The paper describes an investigation into the volume change of cement mortar specimen at the three kinds of different curing schedules including 20℃and 5% Na2SO4 solution curing, tap water standard curing, 50% RH curing for 90 days. The testing results of hydration heat, chemical shrinking and XRD prove that calcined phosphogypsum has evident excitation effect on the activity of high calcium ash and steel slag. Simultaneously, calcined phosphogypsum has the function of decreasing volume shrinkage to blended cement possessing steel slag and high calcium ash. In sulfate curing, calcined phosphogypsum can avoid the phenomenon of protrude apex of the blended cement.