Effect of Curing Temperature on the Morphology and Hydration of MgO Expansive Material in Paste

作     者：ENG Tian Zi WANG Fu PENG Hailong YANG Weibo GAO Peiwei 

作者机构：Department of Civil EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China Communication Plan Survey and Design Institute of Shanxi ProvinceTaiyuan 030012P.R.China 

出 版 物：《Transactions of Nanjing University of Aeronautics and Astronautics》 (南京航空航天大学学报（英文版）)

年 卷 期：2019年第36卷第4期

页      面：675-679页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the Research Center on Levee Safety Disaster Prevention, MWR (No. 2019004) High-level Talent Project Funding Scheme of Jiangsu (No. XCL-CXTD-007) China Postdoctoral Science Foundation (No. 2018M630559) the National Natural Science Foundation of China (No. 51908285) the Fundamental Research Nantong Metro Group Co., Ltd the traffic construction science and technology project of Shanxi (No. 16-2-08) for its financial support in this project 

主　　题：MgO expansive material hydration curing temperature morphology expansion 

摘      要：The morphologies and hydration properties of MgO expansive material at different curing temperatures were *** the curing temperature varies from 25℃to 50℃,the conductivity of MgO rises from 40 to 80μs/cm,the hydration product of MgO expansive material curing in water for 28 days is from 1.5—2 mm to 2—2.5μm in length through SEM observation,and the expansion of pastes with 5%of the magnesium oxide is from 0.36%up to 1.01%,it is increased by 2.78 *** the content of cement paste increases to 95%and cured in water for 90 days,the brucite forms as hexaflaggy?shaped crystal,which is less than 0.1μm and tends to *** effect of curing temperature on the hydration of MgO expansive material is obvious.