缓凝剂对石膏作用效果的影响  

Factors Influencing the Effect of Retarder for Building Gypsum

作　　者：李先友[1] 陈明凤[1] 彭家惠[1] 吴莉[1] 

机构地区：[1]重庆大学建材系

出　　处：《重庆建筑大学学报》2004年第4期92-95,共4页Journal of Chongqing Jianzhu University

基　　金：国家自然科学基金资助项目(50078055)

摘　　要：缓凝剂在石膏中作用效果如何,取决于石膏pH值、石膏细度、石膏品种、石膏水灰比及水化温度等诸多因素,主要考察了石膏pH值、石膏细度和石膏品种对缓凝剂作用效果的影响。结果表明:石膏pH值、石膏细度和石膏品种不同,缓凝剂对石膏凝结时间和强度的作用效果不同。The retarding effect of retardants in building gypsum depend on many factors such as pH value.Fineness of gypsum particles,gypsum type,water/gypsum ratio and hydration temperature.In this paper, the influence of pH value, fineness and sort of gypsum on the effect of retarders are studied. Results show that for the gypsum with different pH value, fineness and of different sort, the effects of retarders on its setting time and strength are different.

关 键 词：石膏 缓凝剂 凝结时间 强度 

分 类 号：TU502[建筑科学—建筑技术科学]