C-S-H凝胶的水热合成及其性能研究  

Hydrothermal synthesis of C-S-H and its properties

作　　者：石磊[1] 马素花[1,2] 李伟峰[1] 程云川[3] 沈晓冬[1,2] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]材料化学工程国家重点实验室,江苏南京210009 [3]武汉理工大学管理学院,湖北武汉430070

出　　处：《混凝土》2013年第11期101-104,107,共5页Concrete

基　　金：国家"973"计划重点基础研究(2009CB623101);国家自然科学基金(51202109);长江学者和创新团队发展计划资助(IRT1146)

摘　　要：水热合成C-S-H凝胶并将其作为晶种添加到水泥中,研究其对水泥物理性能及水化的影响。研究了不同的钙硅比、反应温度、反应时间对合成过程及产物的影响,并将合成产物作为晶种添加到水泥中,研究其对水泥胶砂强度及水化产物的影响。研究表明:水热合成C-S-H的最佳条件为水热温度80℃,反应7 d,钙硅比控制1.5;将C-S-H凝胶以2%的掺量添加到水泥中,可促进水泥水化,改善水泥石的机械强度尤其是早期强度,并且有效缩短水泥凝结时间。C-S-H was synthesized by hydrothermal method and added to the cement as a seed crystal.Study the impact on the physical properties and hydration of cement.Discuss the influence of different calcium silicon ratio, reaction temperature, reaction time on the syn-thesis process and product.Observe the change of cement mortar strength as well as the changes of the hydration products when added with different amount of C-S-H.Studies have shown that the most suitable calcium silicon ratio is 1.5 ,the reaction time is 7 days and the temper-ature is 80℃.The cement mortar obtained optimal strength, especially early strength by added C-S-H dosage of 2%.The setting time of ce-ment can be shortened effectively and the hydration progress could be promoted under this condition.

关 键 词：晶种 C-S—H凝胶 钙硅比 水泥混凝土 抗压强度 

分 类 号：TU528.041[建筑科学—建筑技术科学]