Effects of Reactive MgO on the Reaction Process of Geopolymer

In order to compensate for the shrinkage of geopolymer pastes uniformly, reactive MgO powders are evenly dispersed in the geopolymer. The deformation performance, mechanical properties, microstructure and components of geopolymer pastes with reactive MgO are characterized. The effects of the content...

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Main Authors:	Zhaoheng Li, Wei Zhang, Ruilan Wang, Fangzhu Chen, Xichun Jia, Peitong Cong
Format:	Article
Language:	English
Published:	MDPI AG 2019-02-01
Series:	Materials
Subjects:	reactive MgO geopolymer shrinkage reaction process
Online Access:	https://www.mdpi.com/1996-1944/12/3/526

id	doaj-3a0d636563e3424686ddba86a7f66e23
record_format	Article
spelling	doaj-3a0d636563e3424686ddba86a7f66e232020-11-24T22:09:56ZengMDPI AGMaterials1996-19442019-02-0112352610.3390/ma12030526ma12030526Effects of Reactive MgO on the Reaction Process of GeopolymerZhaoheng Li0Wei Zhang1Ruilan Wang2Fangzhu Chen3Xichun Jia4Peitong Cong5College of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, ChinaCollege of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, ChinaGuangdong Research Institute of Water Resources and Hydropower, Guangzhou 510635, ChinaCollege of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, ChinaCollege of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, ChinaCollege of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, ChinaIn order to compensate for the shrinkage of geopolymer pastes uniformly, reactive MgO powders are evenly dispersed in the geopolymer. The deformation performance, mechanical properties, microstructure and components of geopolymer pastes with reactive MgO are characterized. The effects of the content and the activity of MgO are discussed. The results indicate that the chemical shrinkage, autogenous shrinkage and drying shrinkage decrease with the addition of reactive MgO. MgO reacted with water, and fine Mg(OH)<sub>2</sub> crystals forms as a geopolymer paste. Mg(OH)<sub>2</sub> produces uniform expansion, which refines the pore size of pastes and the compressive strength increases. The shrinkage of the geopolymer pastes is thus effectively compensated.https://www.mdpi.com/1996-1944/12/3/526reactive MgOgeopolymershrinkagereaction process
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Zhaoheng Li Wei Zhang Ruilan Wang Fangzhu Chen Xichun Jia Peitong Cong
spellingShingle	Zhaoheng Li Wei Zhang Ruilan Wang Fangzhu Chen Xichun Jia Peitong Cong Effects of Reactive MgO on the Reaction Process of Geopolymer Materials reactive MgO geopolymer shrinkage reaction process
author_facet	Zhaoheng Li Wei Zhang Ruilan Wang Fangzhu Chen Xichun Jia Peitong Cong
author_sort	Zhaoheng Li
title	Effects of Reactive MgO on the Reaction Process of Geopolymer
title_short	Effects of Reactive MgO on the Reaction Process of Geopolymer
title_full	Effects of Reactive MgO on the Reaction Process of Geopolymer
title_fullStr	Effects of Reactive MgO on the Reaction Process of Geopolymer
title_full_unstemmed	Effects of Reactive MgO on the Reaction Process of Geopolymer
title_sort	effects of reactive mgo on the reaction process of geopolymer
publisher	MDPI AG
series	Materials
issn	1996-1944
publishDate	2019-02-01
description	In order to compensate for the shrinkage of geopolymer pastes uniformly, reactive MgO powders are evenly dispersed in the geopolymer. The deformation performance, mechanical properties, microstructure and components of geopolymer pastes with reactive MgO are characterized. The effects of the content and the activity of MgO are discussed. The results indicate that the chemical shrinkage, autogenous shrinkage and drying shrinkage decrease with the addition of reactive MgO. MgO reacted with water, and fine Mg(OH)<sub>2</sub> crystals forms as a geopolymer paste. Mg(OH)<sub>2</sub> produces uniform expansion, which refines the pore size of pastes and the compressive strength increases. The shrinkage of the geopolymer pastes is thus effectively compensated.
topic	reactive MgO geopolymer shrinkage reaction process
url	https://www.mdpi.com/1996-1944/12/3/526
work_keys_str_mv	AT zhaohengli effectsofreactivemgoonthereactionprocessofgeopolymer AT weizhang effectsofreactivemgoonthereactionprocessofgeopolymer AT ruilanwang effectsofreactivemgoonthereactionprocessofgeopolymer AT fangzhuchen effectsofreactivemgoonthereactionprocessofgeopolymer AT xichunjia effectsofreactivemgoonthereactionprocessofgeopolymer AT peitongcong effectsofreactivemgoonthereactionprocessofgeopolymer
_version_	1725809946651525120

Effects of Reactive MgO on the Reaction Process of Geopolymer

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