Understanding the Role of Metakaolin towards Mitigating the Shrinkage Behavior of Alkali-Activated Slag

This research investigates the mechanism of metakaolin for mitigating the autogenous and drying shrinkages of alkali-activated slag with regard to the activator parameters, including concentration and modulus. The results indicate that the incorporation of metakaolin can decrease the initial viscosi...

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Autores principales:	Bo Fu, Zhenyun Cheng, Jingyun Han, Ning Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	alkali-activated slag metakaolin compressive strength autogenous shrinkage drying shrinkage pore structure Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/041de0fd846a417c9ea6cf1224a321f2
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spelling	oai:doaj.org-article:041de0fd846a417c9ea6cf1224a321f22021-11-25T18:15:10ZUnderstanding the Role of Metakaolin towards Mitigating the Shrinkage Behavior of Alkali-Activated Slag10.3390/ma142269621996-1944https://doaj.org/article/041de0fd846a417c9ea6cf1224a321f22021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6962https://doaj.org/toc/1996-1944This research investigates the mechanism of metakaolin for mitigating the autogenous and drying shrinkages of alkali-activated slag with regard to the activator parameters, including concentration and modulus. The results indicate that the incorporation of metakaolin can decrease the initial viscosity and setting time. Increasing activator concentration can promote the reaction process and shorten the setting time. An increase in the metakaolin content induces a decrease in compressive strength due to reduced formation of reaction products. However, increasing activator dosage and modulus can improve the compressive strength of alkali-activated slag containing 30% metakaolin. The inclusion of metakaolin can mitigate the autogenous and drying shrinkage of alkali-activated slag by coarsening the pore structure. On the other hand, increases in activator concentration and modulus result in an increase in magnitude of the autogenous and drying shrinkage of alkali-activated slag containing metakaolin. The influence of the activator modulus on the shrinkage behavior of alkali-activated slag-metakaolin binary system should be further investigated.Bo FuZhenyun ChengJingyun HanNing LiMDPI AGarticlealkali-activated slagmetakaolincompressive strengthautogenous shrinkagedrying shrinkagepore structureTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6962, p 6962 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	alkali-activated slag metakaolin compressive strength autogenous shrinkage drying shrinkage pore structure Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	alkali-activated slag metakaolin compressive strength autogenous shrinkage drying shrinkage pore structure Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Bo Fu Zhenyun Cheng Jingyun Han Ning Li Understanding the Role of Metakaolin towards Mitigating the Shrinkage Behavior of Alkali-Activated Slag
description	This research investigates the mechanism of metakaolin for mitigating the autogenous and drying shrinkages of alkali-activated slag with regard to the activator parameters, including concentration and modulus. The results indicate that the incorporation of metakaolin can decrease the initial viscosity and setting time. Increasing activator concentration can promote the reaction process and shorten the setting time. An increase in the metakaolin content induces a decrease in compressive strength due to reduced formation of reaction products. However, increasing activator dosage and modulus can improve the compressive strength of alkali-activated slag containing 30% metakaolin. The inclusion of metakaolin can mitigate the autogenous and drying shrinkage of alkali-activated slag by coarsening the pore structure. On the other hand, increases in activator concentration and modulus result in an increase in magnitude of the autogenous and drying shrinkage of alkali-activated slag containing metakaolin. The influence of the activator modulus on the shrinkage behavior of alkali-activated slag-metakaolin binary system should be further investigated.
format	article
author	Bo Fu Zhenyun Cheng Jingyun Han Ning Li
author_facet	Bo Fu Zhenyun Cheng Jingyun Han Ning Li
author_sort	Bo Fu
title	Understanding the Role of Metakaolin towards Mitigating the Shrinkage Behavior of Alkali-Activated Slag
title_short	Understanding the Role of Metakaolin towards Mitigating the Shrinkage Behavior of Alkali-Activated Slag
title_full	Understanding the Role of Metakaolin towards Mitigating the Shrinkage Behavior of Alkali-Activated Slag
title_fullStr	Understanding the Role of Metakaolin towards Mitigating the Shrinkage Behavior of Alkali-Activated Slag
title_full_unstemmed	Understanding the Role of Metakaolin towards Mitigating the Shrinkage Behavior of Alkali-Activated Slag
title_sort	understanding the role of metakaolin towards mitigating the shrinkage behavior of alkali-activated slag
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/041de0fd846a417c9ea6cf1224a321f2
work_keys_str_mv	AT bofu understandingtheroleofmetakaolintowardsmitigatingtheshrinkagebehaviorofalkaliactivatedslag AT zhenyuncheng understandingtheroleofmetakaolintowardsmitigatingtheshrinkagebehaviorofalkaliactivatedslag AT jingyunhan understandingtheroleofmetakaolintowardsmitigatingtheshrinkagebehaviorofalkaliactivatedslag AT ningli understandingtheroleofmetakaolintowardsmitigatingtheshrinkagebehaviorofalkaliactivatedslag
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Understanding the Role of Metakaolin towards Mitigating the Shrinkage Behavior of Alkali-Activated Slag

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