碱激发偏高岭土胶凝材料水化硬化机理的研究  

Study on hydration mechanism of alkali-activated meta-kaolin cementitious material

作　　者：段瑜芳[1] 王培铭[1] 杨克锐[2] 

机构地区：[1]同济大学材料科学与工程学院,上海200092 [2]河北理工大学材料科学与工程学院,河北唐山063009

出　　处：《新型建筑材料》2006年第1期22-25,共4页New Building Materials

摘　　要：碱激发偏高岭土胶凝材料的水化同样可以分为初始期、诱导期、加速期、减速期以及稳定期。但是,各水化阶段的反应机理与传统的水泥基材料完全不同。初始期主要是偏高岭土对溶液组分的表面吸附;诱导期主要表现为活性硅铝氧化物的溶解;加速期表现为四面体基团的聚合;减速期水化速度降低的主要原因是扩散阻力加大,同时偏高岭土反应面积减少,液相中的碱含量降低也是重要原因。The hydration process of alkali-activated meta-kaolin cementatious materials can also be divided into initial,induce,accelerate,decelerate and stable stages.But the hydration mechanism of the alkali-activated meta-kaolin cementitious materials is absolutely different from that of traditional cement based material.The component of solution is absorbed by meta-kaolin in the surface at the initial stage;At induce stage,the active silicon and aluminum oxide are dissolved.the silicon-aluminum tetrahedron network structure is formed at the accelerate stage;the main reason of hydration rate reduce at decelerate stage due to increase of diffuse resistance and at the same time the reaction surface of meta-kaolin becomes smaller.The reduce of alkali in the solution is an important reason too.

关 键 词：碱激发 偏高岭土 胶凝材料 水化处理 

分 类 号：TU528[建筑科学—建筑技术科学]