膨胀剂对C_3A水化的影响  

Influence of Expansive Additives on Hydration of C_3A

作　　者：盛冈实 萩原宏俊 坂井悦郎[2] 大门正机[2] 任子明 

机构地区：[1]电化学工业株式会社 [2]东京工业大学

出　　处：《膨胀剂与膨胀混凝土》2006年第3期25-30,共6页 Expansive Agents & Expansive Concrete

摘　　要：本文定量研究了C3A-石膏膨胀剂系统的水化反应。产物的水化量和水化速率通过XRD和TG-DTA进行定量分析。在C3A-石膏膨胀剂系统中,C3A水化缓慢。无水石膏的水化速率高于石膏。因此,C3A-石膏膨胀剂系统中水化产物的SO3/Al203摩尔比高于C3A-石膏系统。水化产物中SO3/Al203摩尔比同C3A相近。We examined the hydration reaction of C3A-gypsum-expansive additive-system by quantitative viewpoint.Amounts of hydrates and hydration rates of compounds in this system were examined by XRD quantitative analysis and TG-DTA.In the C3A-gypsum-expansive additive system,hydration of C3A was retarded.Hydration ratio of anhydrite was higher than that of gypsum.Therefore,SO3/Al203 molar ratio for reacted compounds in the C3A-gypsum expansive additives system were higher than that in the C3A-gypsum system.The SO3/Al2O3 molar ratio for reacted compounds has close to reaction ratio of C3A.

关 键 词：C3A 游离氧化钙 蓝方石 无水石膏 阿立特 水化 定量分析 

分 类 号：TU528.042.4[建筑科学—建筑技术科学]