Stress Distribution in Microregion of Core–Shell Structure Lightweight Aggregate Concrete

An in-depth understanding of the effect of cordierite/belite core–shell structure lightweight aggregate (CSLWA) on the mechanical performance of LWA concrete (LWAC) is critical for improving the failure resistance of LWAC. In this study, the stress distribution of the microregion in CSLWA was system...

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Autores principales:	Meng Zhu, Lihua Zhang, Weilong Wang, Hongping Zhang, Wenjin Xing
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	concrete core–shell structure lightweight aggregate interfacial transition zone finite element method microregion stress Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/650de3ee671845a59226648760aead62
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spelling	oai:doaj.org-article:650de3ee671845a59226648760aead622021-11-25T17:00:01ZStress Distribution in Microregion of Core–Shell Structure Lightweight Aggregate Concrete10.3390/buildings111105402075-5309https://doaj.org/article/650de3ee671845a59226648760aead622021-11-01T00:00:00Zhttps://www.mdpi.com/2075-5309/11/11/540https://doaj.org/toc/2075-5309An in-depth understanding of the effect of cordierite/belite core–shell structure lightweight aggregate (CSLWA) on the mechanical performance of LWA concrete (LWAC) is critical for improving the failure resistance of LWAC. In this study, the stress distribution of the microregion in CSLWA was systematically investigated via a finite element analysis to explore its effect on the mechanical properties of LWAC. In detail, the material components, core–shell thickness ratio, porosity and width of interfacial transition zone (ITZ), and absence or presence of interfacial bonding zone (IBZ) were considered during the stress distribution analysis of the microregion of LWAC. The results showed that a reduction in the material components, with a high-elastic modulus in the core, a decrease in the core–shell thickness ratio, and the formation of the core–shell IBZ are beneficial for optimizing the stress distribution of the microregion and alleviating the stress concentration phenomenon of LWAC. Moreover, due to the continuous hydration of belite shell, the ITZ of CSLWA becomes increasingly dense, thus the stress distribution is more uniform than that of ordinary LWAC, indicating that CSLWA exhibits the potential to improve the failure resistance of LWAC. This study helps to develop an understanding of the role played by the core–shell structure in improving the toughness of LWAC, and provides a new solution and methodology for improving the brittleness of LWAC.Meng ZhuLihua ZhangWeilong WangHongping ZhangWenjin XingMDPI AGarticleconcretecore–shell structurelightweight aggregateinterfacial transition zonefinite element methodmicroregion stressBuilding constructionTH1-9745ENBuildings, Vol 11, Iss 540, p 540 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	concrete core–shell structure lightweight aggregate interfacial transition zone finite element method microregion stress Building construction TH1-9745
spellingShingle	concrete core–shell structure lightweight aggregate interfacial transition zone finite element method microregion stress Building construction TH1-9745 Meng Zhu Lihua Zhang Weilong Wang Hongping Zhang Wenjin Xing Stress Distribution in Microregion of Core–Shell Structure Lightweight Aggregate Concrete
description	An in-depth understanding of the effect of cordierite/belite core–shell structure lightweight aggregate (CSLWA) on the mechanical performance of LWA concrete (LWAC) is critical for improving the failure resistance of LWAC. In this study, the stress distribution of the microregion in CSLWA was systematically investigated via a finite element analysis to explore its effect on the mechanical properties of LWAC. In detail, the material components, core–shell thickness ratio, porosity and width of interfacial transition zone (ITZ), and absence or presence of interfacial bonding zone (IBZ) were considered during the stress distribution analysis of the microregion of LWAC. The results showed that a reduction in the material components, with a high-elastic modulus in the core, a decrease in the core–shell thickness ratio, and the formation of the core–shell IBZ are beneficial for optimizing the stress distribution of the microregion and alleviating the stress concentration phenomenon of LWAC. Moreover, due to the continuous hydration of belite shell, the ITZ of CSLWA becomes increasingly dense, thus the stress distribution is more uniform than that of ordinary LWAC, indicating that CSLWA exhibits the potential to improve the failure resistance of LWAC. This study helps to develop an understanding of the role played by the core–shell structure in improving the toughness of LWAC, and provides a new solution and methodology for improving the brittleness of LWAC.
format	article
author	Meng Zhu Lihua Zhang Weilong Wang Hongping Zhang Wenjin Xing
author_facet	Meng Zhu Lihua Zhang Weilong Wang Hongping Zhang Wenjin Xing
author_sort	Meng Zhu
title	Stress Distribution in Microregion of Core–Shell Structure Lightweight Aggregate Concrete
title_short	Stress Distribution in Microregion of Core–Shell Structure Lightweight Aggregate Concrete
title_full	Stress Distribution in Microregion of Core–Shell Structure Lightweight Aggregate Concrete
title_fullStr	Stress Distribution in Microregion of Core–Shell Structure Lightweight Aggregate Concrete
title_full_unstemmed	Stress Distribution in Microregion of Core–Shell Structure Lightweight Aggregate Concrete
title_sort	stress distribution in microregion of core–shell structure lightweight aggregate concrete
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/650de3ee671845a59226648760aead62
work_keys_str_mv	AT mengzhu stressdistributioninmicroregionofcoreshellstructurelightweightaggregateconcrete AT lihuazhang stressdistributioninmicroregionofcoreshellstructurelightweightaggregateconcrete AT weilongwang stressdistributioninmicroregionofcoreshellstructurelightweightaggregateconcrete AT hongpingzhang stressdistributioninmicroregionofcoreshellstructurelightweightaggregateconcrete AT wenjinxing stressdistributioninmicroregionofcoreshellstructurelightweightaggregateconcrete
_version_	1718412779296129024

Stress Distribution in Microregion of Core–Shell Structure Lightweight Aggregate Concrete

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