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Title: Microstructure of amorphous aluminum hydroxide in belite-calcium sulfoaluminate cement

Abstract

Belite-calcium sulfoaluminate (BCSA) cement is a promising low-CO{sub 2} alternative to ordinary Portland cement. Herein, aluminum hydroxide (AH{sub 3}), the main amorphous hydration product of BCSA cement, was investigated in detail. The microstructure of AH{sub 3} with various quantities of gypsum was investigated via scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The AH{sub 3} with various morphologies were observed and confirmed in the resulting pastes. Particular attention was paid to the fact that AH{sub 3} always contained a small amount of Ca according to the results of EDS analysis. The AH{sub 3} was then characterized via high resolution transmission electron microscopy (HRTEM). The results of HRTEM indicated that Ca arose from nanosized tricalcium aluminate hexahydrate which existed in the AH{sub 3}.

Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
22475500
Resource Type:
Journal Article
Journal Name:
Cement and Concrete Research
Additional Journal Information:
Journal Volume: 71; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0008-8846
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINATES; ALUMINIUM HYDROXIDES; CALCIUM COMPOUNDS; CARBON DIOXIDE; GYPSUM; HYDRATION; MICROSTRUCTURE; MORPHOLOGY; NANOSTRUCTURES; PORTLAND CEMENT; SCANNING ELECTRON MICROSCOPY; TRANSMISSION ELECTRON MICROSCOPY; X-RAY SPECTROSCOPY

Citation Formats

Song, Fei, Yu, Zhenglei, Yang, Fengling, Lu, Yinong, E-mail: yinonglu@njtech.edu.cn, and Liu, Yunfei, E-mail: yfliu@njtech.edu.cn. Microstructure of amorphous aluminum hydroxide in belite-calcium sulfoaluminate cement. United States: N. p., 2015. Web. doi:10.1016/J.CEMCONRES.2015.01.013.
Song, Fei, Yu, Zhenglei, Yang, Fengling, Lu, Yinong, E-mail: yinonglu@njtech.edu.cn, & Liu, Yunfei, E-mail: yfliu@njtech.edu.cn. Microstructure of amorphous aluminum hydroxide in belite-calcium sulfoaluminate cement. United States. doi:10.1016/J.CEMCONRES.2015.01.013.
Song, Fei, Yu, Zhenglei, Yang, Fengling, Lu, Yinong, E-mail: yinonglu@njtech.edu.cn, and Liu, Yunfei, E-mail: yfliu@njtech.edu.cn. Fri . "Microstructure of amorphous aluminum hydroxide in belite-calcium sulfoaluminate cement". United States. doi:10.1016/J.CEMCONRES.2015.01.013.
@article{osti_22475500,
title = {Microstructure of amorphous aluminum hydroxide in belite-calcium sulfoaluminate cement},
author = {Song, Fei and Yu, Zhenglei and Yang, Fengling and Lu, Yinong, E-mail: yinonglu@njtech.edu.cn and Liu, Yunfei, E-mail: yfliu@njtech.edu.cn},
abstractNote = {Belite-calcium sulfoaluminate (BCSA) cement is a promising low-CO{sub 2} alternative to ordinary Portland cement. Herein, aluminum hydroxide (AH{sub 3}), the main amorphous hydration product of BCSA cement, was investigated in detail. The microstructure of AH{sub 3} with various quantities of gypsum was investigated via scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The AH{sub 3} with various morphologies were observed and confirmed in the resulting pastes. Particular attention was paid to the fact that AH{sub 3} always contained a small amount of Ca according to the results of EDS analysis. The AH{sub 3} was then characterized via high resolution transmission electron microscopy (HRTEM). The results of HRTEM indicated that Ca arose from nanosized tricalcium aluminate hexahydrate which existed in the AH{sub 3}.},
doi = {10.1016/J.CEMCONRES.2015.01.013},
journal = {Cement and Concrete Research},
issn = {0008-8846},
number = ,
volume = 71,
place = {United States},
year = {2015},
month = {5}
}