Experimental study on mechanical properties and microstructures of steel fiber-reinforced fly ash-metakaolin geopolymer-recycled concrete

Geopolymer cementitious materials and recycled aggregate are typical representatives of material innovation research in the engineering field. In this study, we experimentally investigated a method to improve the performance of geopolymer-recycled aggregate concrete (GRAC). The recycled concrete agg...

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Autores principales:	Xu Zhong, Huang Zhenpu, Liu Changjiang, Deng Xiaowei, Hui David, Deng Yuting, Zhao Min, Qin Libing
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	sf geopolymer recycled concrete orthogonal test microstructure Technology T Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/3319e7eb10224aea9662d59c00d516b2
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spelling	oai:doaj.org-article:3319e7eb10224aea9662d59c00d516b22021-12-05T14:11:03ZExperimental study on mechanical properties and microstructures of steel fiber-reinforced fly ash-metakaolin geopolymer-recycled concrete1605-812710.1515/rams-2021-0050https://doaj.org/article/3319e7eb10224aea9662d59c00d516b22021-08-01T00:00:00Zhttps://doi.org/10.1515/rams-2021-0050https://doaj.org/toc/1605-8127Geopolymer cementitious materials and recycled aggregate are typical representatives of material innovation research in the engineering field. In this study, we experimentally investigated a method to improve the performance of geopolymer-recycled aggregate concrete (GRAC). The recycled concrete aggregates and steel fiber (SF), fly ash (FA), metakaolin (MK), and sodium silicate solution were used as the main raw materials to prepare fiber-reinforced geopolymer-recycled aggregate concrete (FRGRAC). First, the orthogonal test was carried out to study the GRAC, and the optimal mix proportion was found. Second, building on the optimal mix proportion, the effects of the SF content on the slump, 7 and 28 days compressive strength, tensile strength, and flexural strength of FRGRAC were further studied. Finally, the microscopic mechanism of FRGRAC was studied by scanning electron microscopy (SEM). The study results indicate that the slump continues to decrease as the fiber content increases, but the compressive strength, tensile strength, and flexural strength increase to a certain extent. Through SEM analysis, it is found that SF restrains the development of cracks and improves the strength of concrete.Xu ZhongHuang ZhenpuLiu ChangjiangDeng XiaoweiHui DavidDeng YutingZhao MinQin LibingDe Gruyterarticlesfgeopolymerrecycled concreteorthogonal testmicrostructureTechnologyTChemical technologyTP1-1185ENReviews on Advanced Materials Science, Vol 60, Iss 1, Pp 578-590 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	sf geopolymer recycled concrete orthogonal test microstructure Technology T Chemical technology TP1-1185
spellingShingle	sf geopolymer recycled concrete orthogonal test microstructure Technology T Chemical technology TP1-1185 Xu Zhong Huang Zhenpu Liu Changjiang Deng Xiaowei Hui David Deng Yuting Zhao Min Qin Libing Experimental study on mechanical properties and microstructures of steel fiber-reinforced fly ash-metakaolin geopolymer-recycled concrete
description	Geopolymer cementitious materials and recycled aggregate are typical representatives of material innovation research in the engineering field. In this study, we experimentally investigated a method to improve the performance of geopolymer-recycled aggregate concrete (GRAC). The recycled concrete aggregates and steel fiber (SF), fly ash (FA), metakaolin (MK), and sodium silicate solution were used as the main raw materials to prepare fiber-reinforced geopolymer-recycled aggregate concrete (FRGRAC). First, the orthogonal test was carried out to study the GRAC, and the optimal mix proportion was found. Second, building on the optimal mix proportion, the effects of the SF content on the slump, 7 and 28 days compressive strength, tensile strength, and flexural strength of FRGRAC were further studied. Finally, the microscopic mechanism of FRGRAC was studied by scanning electron microscopy (SEM). The study results indicate that the slump continues to decrease as the fiber content increases, but the compressive strength, tensile strength, and flexural strength increase to a certain extent. Through SEM analysis, it is found that SF restrains the development of cracks and improves the strength of concrete.
format	article
author	Xu Zhong Huang Zhenpu Liu Changjiang Deng Xiaowei Hui David Deng Yuting Zhao Min Qin Libing
author_facet	Xu Zhong Huang Zhenpu Liu Changjiang Deng Xiaowei Hui David Deng Yuting Zhao Min Qin Libing
author_sort	Xu Zhong
title	Experimental study on mechanical properties and microstructures of steel fiber-reinforced fly ash-metakaolin geopolymer-recycled concrete
title_short	Experimental study on mechanical properties and microstructures of steel fiber-reinforced fly ash-metakaolin geopolymer-recycled concrete
title_full	Experimental study on mechanical properties and microstructures of steel fiber-reinforced fly ash-metakaolin geopolymer-recycled concrete
title_fullStr	Experimental study on mechanical properties and microstructures of steel fiber-reinforced fly ash-metakaolin geopolymer-recycled concrete
title_full_unstemmed	Experimental study on mechanical properties and microstructures of steel fiber-reinforced fly ash-metakaolin geopolymer-recycled concrete
title_sort	experimental study on mechanical properties and microstructures of steel fiber-reinforced fly ash-metakaolin geopolymer-recycled concrete
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/3319e7eb10224aea9662d59c00d516b2
work_keys_str_mv	AT xuzhong experimentalstudyonmechanicalpropertiesandmicrostructuresofsteelfiberreinforcedflyashmetakaolingeopolymerrecycledconcrete AT huangzhenpu experimentalstudyonmechanicalpropertiesandmicrostructuresofsteelfiberreinforcedflyashmetakaolingeopolymerrecycledconcrete AT liuchangjiang experimentalstudyonmechanicalpropertiesandmicrostructuresofsteelfiberreinforcedflyashmetakaolingeopolymerrecycledconcrete AT dengxiaowei experimentalstudyonmechanicalpropertiesandmicrostructuresofsteelfiberreinforcedflyashmetakaolingeopolymerrecycledconcrete AT huidavid experimentalstudyonmechanicalpropertiesandmicrostructuresofsteelfiberreinforcedflyashmetakaolingeopolymerrecycledconcrete AT dengyuting experimentalstudyonmechanicalpropertiesandmicrostructuresofsteelfiberreinforcedflyashmetakaolingeopolymerrecycledconcrete AT zhaomin experimentalstudyonmechanicalpropertiesandmicrostructuresofsteelfiberreinforcedflyashmetakaolingeopolymerrecycledconcrete AT qinlibing experimentalstudyonmechanicalpropertiesandmicrostructuresofsteelfiberreinforcedflyashmetakaolingeopolymerrecycledconcrete
_version_	1718371412810399744

Experimental study on mechanical properties and microstructures of steel fiber-reinforced fly ash-metakaolin geopolymer-recycled concrete

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