个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:武汉理工大学
学位:博士
所在单位:土木工程系
学科:材料学. 结构工程
联系方式:mlchang@dlut.edu.cn
电子邮箱:mlchang@dlut.edu.cn
AH(3) phase in the hydration product system of AFt-AFm-AH(3) in calcium sulfoaluminate cements: A microstructural study
点击次数:
论文类型:期刊论文
发表时间:2018-04-10
发表刊物:CONSTRUCTION AND BUILDING MATERIALS
收录刊物:SCIE、EI
卷号:167
页面范围:587-596
ISSN号:0950-0618
关键字:Calcium sulfoaluminate cement; Hydration; AH(3) phase; Rietveld methodology; Crystallite size
摘要:In calcium sulfoaluminate cements, two hydration product systems, namely the monosulfate (AFm) - aluminum hydroxide (AH(3)) system and the ettringite (AFt) - AH(3) system, were created based on the reactions of ye'elimite with and without gypsum. From chemically synthesized samples, the composition and microstructure of the AH(3) phase in the hydration product system AFt-AFm-AH(3) were characterized using X-ray diffraction, Rietveld method, thermogravimetric analysis, Al-27 magic angle spinning nuclear magnetic resonance spectroscopy, field emission scanning electron microscopy, and inductively coupled plasma optical emission spectroscopy. It was seen that AH(3) phase in both AFm-AH(3) system and AFt-AH(3) system had a gibbsite-like structure presented in a microcrystalline or nanocrystalline structure, while the AH(3) phase in the AFt-AH(3) system had an average crystallite size close to 20 nm. (C) 2018 Elsevier Ltd. All rights reserved.