Effects of Molecular Structure of Polycarboxylate-type Superplasticizer on the Hydration Properties of C_3S

作     者：丁庆军 

作者机构：State Key Laboratory of Silicate Materials for ArchitecturesWuhan University of Technology 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2012年第27卷第4期

页      面：768-772页

核心收录：

学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 0702[理学-物理学] 

基　　金：Funded by the National Basic Research Program of China(973 Program)(No.2009CB623201) 

主　　题：tricalcium silicate polycarboxylate superplasticizer C-S-H gel hydration NMR 

摘      要：Effects of polycarboxylate-type superplasticizer（PC） molecular structure on the hydration heat of tricalcium silicate（C3S） paste and polymerization degree of hydration products（C-S-H gel） were researched by using TAM AIR isothermal microcalorimetry（TA） and 29Si nuclear magnetic resonance（NMR）.Methoxy polyethylene glycol-methacrylates-based polycarboxylate superplasticizers with different side chain lengths and main chain lengths were *** molecules with shorter main chain or longer side chains caused stronger retardation of C3S early hydration and lesser increase of C3S 3 d hydration *** measurement indicated that the incorporation of PC increased the hydration degree of C3S paste and the polymerization degree of silicon-oxygen tetrahedron of C-S-H *** tendency for C3S 7 d hydration degree to improve was more pronounced while PC molecules with longer main chain or shorter side chain were ***,PC molecules with longer main chains or longer side chains increased the 7 d polymerization degree of C-S-H gel.