碱对硅酸盐水泥水化硬化性能的影响  

EFFECT OF ALKALI ON HYDRATION PROCESS AND PROPERTIES OF CEMENT

作　　者：陈旭峰[1] 陆纯煊[2] 

机构地区：[1]中国建筑材料科学研究院耐火材料研究所,北京100024 [2]中国建筑材料科学研究院

出　　处：《硅酸盐学报》1993年第4期301-308,共8页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金;建材行业科技发展基金资助

摘　　要：系统地研究了以碱含量不同、存在形式各异的熟料所制水泥的水化液相成分、水化程度、水化产物和硬化浆体微观结构,揭示了碱对硅酸盐水泥水化硬化性能影响的机理。水泥水化时,熟料中的碱迅速溶入水化液相,使液相中[OH-]升高、[Ca^(2+)]降低。由此促进水泥早期水化,并阻滞了后期水化的发展。所以,高碱水泥凝结快,1～3d硬化浆体的孔隙少、强度高;7～28d硬化浆体的孔隙多、强度低。The degree of hydration, hydrates and microstructure of hardened cement, as well as composition of liquid phase in hydration of cements produced from different kinds of clinker and with different contents of alkali, were studied, and the mechanism of the effect of alkali on hydration process and properties of cement were revealed. It is concluded that during hydration, alkali in clinker quickly solves into the liquid phase, which subsequently increases the concentration of OH-and decreases that of Ca^(2+). As a result, hydration of cement in the early age is accelerated but in the later age, hydration is retarded. So the high alkali cements are of quick setting, higher early strength, and lower porosity at 1 to 3 days, but of higher porosity and lower strength at 7 to 28 days.

关 键 词：碱 水泥 水化硬化 硅酸盐水泥 

分 类 号：TQ172.13[化学工程—水泥工业]