火山灰活性评价方法及其影响因素  

Evaluation Methods and Influence Factors of Pozzolanic Activity

作　　者：张思宇[1] 黄少文[1] 

机构地区：[1]南昌大学材料科学与工程学院,南昌330031

出　　处：《材料导报》2011年第15期104-106,113,共4页Materials Reports

摘　　要：介绍了国内外水泥混凝土中使用的火山灰质材料活性评价方法的分类和研究现状,并分析了影响火山灰活性的因素,如细度、化学成分、矿物成分和热处理温度等。火山灰活性评价方法主要有酸碱溶出法、石灰吸收法、热分析法等直接测量火山灰活性的方法和强度指数法、电导率法、水化热反应热法等间接测量火山灰活性的方法。通过分析各种影响火山灰活性的因素,得出以下结论:火山灰质材料越细或比表面积越大,火山灰活性越高;火山灰质材料中非晶态硅酸盐和铝酸盐含量越高,则火山灰活性越高;适当的热处理温度将有效提高一些火山灰质材料的火山灰活性。Advances and classification of evaluation methods of pozzolanic activity of pozzolanic materials in cement or concrete are presented. And influence factors of pozzolanic activity are also analyzed at the same time. Evaluation methods of pozzolanic activity can be categorized as either direct or indirect methods. Direct methods include acidbase dissolution, lime absorption, thermal analysis, and indirect methods include pozzolanie activity index, electrical conductivity, hydration reaction heat. Through analysis of influence factors of pozzolanic activity, it is obtained that pozzolanic materials with smaller particles or with high contents of noncrystalline silicate and aluminate have high pozzolanic activity, and appropriate temperature of heat treatment is in favor of improving pozzolanic activity of some materials.

关 键 词：水泥 火山灰活性 评价方法 影响因素 

分 类 号：TQ172.44[化学工程—水泥工业]