Hydration evolution of pre-cast concrete with steam and water curing

作     者：巴明芳 钱春香 

作者机构：Faculty of Architectural Civil Engineering and EnvironmentNingbo University School of Materials Science and EngineeringSoutheast University 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2013年第20卷第10期

页      面：2870-2878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] 

基　　金：Project(51308308) supported by the National Natural Science Foundation of China Project(LQ12E08002) supported by the Natural Science Foundation of Zhejiang Province,China Project(2012A610159) supported by the Natural Science Foundation of Ningbo City,China Projects(XKL11D2081,zj1113) Subject Program of Ningbo University,China Project(2010R50034) supported by the Key Science and Technology Innovation Team Program of Zhejiang Province,China Project supported by K.C Wong Magna Fund in Ningbo University 

主　　题：microstructure evolution hydration kinetics effective curing condition pre-cast concrete 

摘      要：The hydration characteristics of pre-cast concrete considering the effects of effective initial steam-curing and water-curing duration were measured and analyzed with XRD, TG, X-ray CT, SEM-BSE and MIP techniques. The results show that the effective initial steam-curing duration for pre-cast concrete with lower water-binder ratio was 10 14 h at 50 °C and the initial water-curing duration was 7 14 d. And the hydration evolution of cement, fly ash and slag in pre-cast concrete was obtained respectively by combining the hydrochlorides and EDTA selecting dissolution methods, based on which the contents of hydrated and anhydrate in concrete were calculated and the corresponding dynamic capillary porosity was also determined. Moreover, the comparison between calculated results and experimental ones indicates that the proposed evolution models of microscopic characteristics corresponding to hydration kinetics of cemented materials could be adopted to predict the developing trend of capillary porosity and hydration-products content in pre-cast concrete with fly ash and slag under certain curing conditions.