碱激发碳酸盐矿-矿渣胶凝-灌浆材料缓凝与流动性能的改善  

RETARDATION OF GELATION AND IMPROVEMENT OF FLOWABILITY FOR ALKALI-ACTIVATED CARBONATITESLAG CEMENTITIOUS-GROUTING MATERIAL

作　　者：余其俊[1] 赵三银[2] 黄家琪[1] 乔飞[1] 郭文瑛[1] 殷素红[1] 文梓芸[1] 古国榜[2] 

机构地区：[1]华南理工大学材料科学与工程学院 [2]华南理工大学化学科学学院

出　　处：《硅酸盐学报》2005年第7期871-875,共5页Journal of The Chinese Ceramic Society

基　　金："863"计划(2002AA335050);华南理工大学高水平大学建设重大(B09224)资助项目。

摘　　要：苹果酸、硝酸锌、硝酸铅、消石灰等对水玻璃矿渣水泥具有良好的缓凝作用,但不能有效地延缓碱激发碳酸盐矿矿渣胶凝灌浆材料浆液的凝胶化时间。研究发现:外加剂氯化钡能很好地改善该灌浆材料浆液工作性能,如凝胶化时间、Marsh流出时间和扩展度等,而且还有利于强度性能的提高。外加剂氯化钡的缓凝作用是由于在矿渣粉的表面形成了良好的包裹层。Malic acid, zinc nitrate, lead nitrate, and lime hydrate, etc can retard the setting of water glass-slag cement, hut have no retarding effect on the gelation time of alkali-activated carbonatite-slag cementitious-grouting materials. The investigation results show that barium chloride additive significantly enhance the workability of slag cementitious materials by improving, such as gelation time, Marsh cone flow time, mini-slump, and the compressive strength of the concrete. The retarding effect of barium chloride is attributed to the formation of a protective layer on the surface of slag grain due to the reaction between barium chloride and water glass.

关 键 词：凝胶化时间 流动性能 碱胶凝材料 水玻璃 缓凝作用 

分 类 号：TU528[建筑科学—建筑技术科学] TQ172[化学工程—水泥工业]