Influence of MgO-type Expansive Agent Hydration Behaviors on Expansive Properties of Concrete

作     者：卢小琳 LU Xiaolin,GENG Fei,ZHANG Hongbo,CHEN Xiong (College of Materials Science and Technology,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China)

作者机构：College of Materials Science and TechnologyNanjing University of Aeronautics & Astronautics 

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：2011年第26卷第2期

页      面：345-347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：Funded by the National Project of "863" (2009AA03Z508) XiBu Traffic Program (2009ZB01) 

主　　题：concrete expansive agent expansion hydration conductivity 

摘      要：The hydration behaviors and expansive properties of MgO-type expansive agent curing at different temperatures and environment were *** the curing temperatures changed from 25℃ to 50℃,the conductivities of MgO samples increased from 40 to 80 μs/cm,and the hydrations of MgO were quickened up *** SEM observation,the hydration product of MgO cured at 50℃ for 28 day was about 2-3μm in *** expansion of pastes with 5% of the MgO-type expansive agent was from 0.36% to 1.01% when the curing temperature changed from 25oC to 50℃.When 8% of the MgO-type expansive agent was added,the early shrinkage of concrete was *** expansion ratio increased with the curing temperature,and the expansive cracking of concrete with MgO-type expansive agent might be decreased by blending fly ash.