矿渣超细粉作用机理的探讨.pdfVIP

第 5 卷第 1 期 建 　筑 　材 　料 　学 　报 Vol . 5 , No . 1 2002 年 3 月 J OU RNAL OF BU ILD IN G MA TER IAL S 　 Mar . ,2002 　　文章编号 (2002) 0 1008406 矿渣超细粉作用机理的探讨 牛全林 , 　冯乃谦 , 　杨 　静 (清华大学 土木工程系 , 北京 100084) 摘要 : 根据 Hor sfield 模型 ,讨论了超细粉的填充效应. 利用水化程度与颗粒粒径 、水化深 度的理论关系 ,结合矿渣粉体实测的粒径分布 ,计算了超细粉的水化程度. 用压汞法测量 了超细粉比表面积 ,并讨论了其对水化水泥浆体孔结构的影响. 研究了水泥胶砂强度随矿 渣比表面积的变化规律. 结果表明 ,据 Hor sfield 模型确定的超细填充粉 ,具有良好的填充 效应 ,能有效地改善硬化水泥浆体的孔径分布 ,计算所得的矿渣水化程度与矿渣水泥强度 具有很好的相关性. 关键词 :矿渣 ; 粒径分布 ; 填充效应 ; 诱增活性 ; 水化程度 中图分类号 : TU 528 . 04 　　　文献标识码 :A Mechanism of Superf ine Slag Powder N I U Q uanl i n , 　FEN G N aiqian , 　YA N G J i ng (Department of Civil Engineering , Tsinghua Univer sity , Beijing 100084 , China) Abstract : The p acking effect and pozzolanic effect of superfine slag pow der were analyzed to illust rate t he p acking mechanism of superfine slag pow der . In t he p acking effect , Hor sfield model was employed to define t he app rop riate fineness of slag pow der , and t he Andrensen equation was int roduced to com p are t he p article size dist ribution to reveal t he cont ribution of t he superfines to t he clo se p acking . In pozzolanic effect , t he degree of hydration was calculated accor ding to t he hydration model and t he mea sured p article size dist ribution of slag . A s an examination of t he analysis , t he har dened slag cement p astes were tested for st rengt h and mercury int rusion . The result s show t hat t he p acking effect of t he selected pow der s is po sitive and obvious ; t he pozzolanic effect is beneficial to t he st rengt h of t he p aste t hat is clo sely related to t he degree of hydrat