半水/无水磷石膏复相胶凝材料水化硬化特性研究  

Study on Hydration and Hardening of Duplex Gypsum Binder of Hemihydrite Phosphogypsum and Anhydrite Phosphogypsum

作　　者：杨成军[1] 杨敏[1] 曹建新[1] 

机构地区：[1]贵州大学化学与化工学院,贵州省矿产资源高效利用与绿化化工技术重点实验室,贵州贵阳550025

出　　处：《非金属矿》2014年第6期22-25,共4页Non-Metallic Mines

基　　金：国家自然科学基金(50802019);贵州大学研究生创新基金(研理工2014051);贵州省科技计划课题(黔科合SY字[2013]3088);贵阳市科技计划项目(筑科合同[2012101]2-19)

摘　　要：采用半水磷石膏与无水磷石膏复配制备复相磷石膏胶凝材料,通过测试复相磷石膏的凝结时间、强度性能和水化温升,结合X射线衍射(XRD)和扫描电镜(SEM)技术研究复相磷石膏水化硬化特性。结果表明,半水磷石膏激发无水磷石膏水化,使其水化放热加快,凝结时间缩短;无水磷石膏延缓半水磷石膏凝结硬化,凝结时间延长,水化放热减缓;与纯半水、无水磷石膏相比,复相磷石膏晶体形貌致密程度高,孔隙率低,硬化体强度较好。The hydration and hardening characteristics of duplex phosphogypsum（DPG） prepared by hemihydrate phosphogypsum（HPG） and anhydrite phosphogypsum（APG） were studied through investigating the setting time, strength properties and temperature rise of hydration and by analyzing the XRD spectrum and SEM graphs of the prepared DPG. The results show that APG was activated by HPG, and the heat evolution was accelerated. And the hydration of HPG was retarded by APG, leading to retardation of the heat evolution. Comparing with pure hemihydrates or anhydrite phosphogypsum, the duplex phosphogypsum binder has higher compactness of crystal morphology, lower porosity and better strength of hardened paste.

关 键 词：半水磷石膏 无水磷石膏 复配 水化硬化 

分 类 号：TQ177.375[化学工程—硅酸盐工业]