Application of Coal Gangue as a Coarse Aggregate in Green Concrete Production: A Review

Among the techniques for converting stacked coal gangue to reusable material, one of the most effective ways is to use coal gangue as a coarse aggregate in green concrete productions. The physical and chemical properties of rock and spontaneous-combustion coal gangue are generally suitable for being...

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Autores principales:	Shan Gao, Sumei Zhang, Lanhui Guo
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	coal gangue green concrete coarse aggregate structural member eco-friendly production 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/931b24c9dca24e1b848c782e6023e1ae
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spelling	oai:doaj.org-article:931b24c9dca24e1b848c782e6023e1ae2021-11-25T18:13:43ZApplication of Coal Gangue as a Coarse Aggregate in Green Concrete Production: A Review10.3390/ma142268031996-1944https://doaj.org/article/931b24c9dca24e1b848c782e6023e1ae2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6803https://doaj.org/toc/1996-1944Among the techniques for converting stacked coal gangue to reusable material, one of the most effective ways is to use coal gangue as a coarse aggregate in green concrete productions. The physical and chemical properties of rock and spontaneous-combustion coal gangue are generally suitable for being used as a coarse aggregate in green concrete. Coal gangue concrete is not recommended to be used in subsurface structures, as its water absorption law would be changed under a large replacement ratio. The mechanical performance of coal gangue concrete is degraded by raising the replacement ratio. Over-low and -high concrete grades are not suggested to be used as coal gangue aggregate, unless extra admixtures or specific methods are used. The influence of coal gangue on the durability of coal gangue concrete is remarkable, resulting from the porous structure of coal gangue that provides more transmission channels for air and liquid in concrete, but is beneficial for thermal insulation. The usage of coal gangue in structural concrete members is still limited. The mechanical behavior of some structural members using coal gangue concrete has been reported. Among them, concrete filled steel tubes are a preferable configuration for using coal gangue concrete, regarding both the mechanical and durability performance.Shan GaoSumei ZhangLanhui GuoMDPI AGarticlecoal ganguegreen concretecoarse aggregatestructural membereco-friendly productionTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6803, p 6803 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	coal gangue green concrete coarse aggregate structural member eco-friendly production 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	coal gangue green concrete coarse aggregate structural member eco-friendly production 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 Shan Gao Sumei Zhang Lanhui Guo Application of Coal Gangue as a Coarse Aggregate in Green Concrete Production: A Review
description	Among the techniques for converting stacked coal gangue to reusable material, one of the most effective ways is to use coal gangue as a coarse aggregate in green concrete productions. The physical and chemical properties of rock and spontaneous-combustion coal gangue are generally suitable for being used as a coarse aggregate in green concrete. Coal gangue concrete is not recommended to be used in subsurface structures, as its water absorption law would be changed under a large replacement ratio. The mechanical performance of coal gangue concrete is degraded by raising the replacement ratio. Over-low and -high concrete grades are not suggested to be used as coal gangue aggregate, unless extra admixtures or specific methods are used. The influence of coal gangue on the durability of coal gangue concrete is remarkable, resulting from the porous structure of coal gangue that provides more transmission channels for air and liquid in concrete, but is beneficial for thermal insulation. The usage of coal gangue in structural concrete members is still limited. The mechanical behavior of some structural members using coal gangue concrete has been reported. Among them, concrete filled steel tubes are a preferable configuration for using coal gangue concrete, regarding both the mechanical and durability performance.
format	article
author	Shan Gao Sumei Zhang Lanhui Guo
author_facet	Shan Gao Sumei Zhang Lanhui Guo
author_sort	Shan Gao
title	Application of Coal Gangue as a Coarse Aggregate in Green Concrete Production: A Review
title_short	Application of Coal Gangue as a Coarse Aggregate in Green Concrete Production: A Review
title_full	Application of Coal Gangue as a Coarse Aggregate in Green Concrete Production: A Review
title_fullStr	Application of Coal Gangue as a Coarse Aggregate in Green Concrete Production: A Review
title_full_unstemmed	Application of Coal Gangue as a Coarse Aggregate in Green Concrete Production: A Review
title_sort	application of coal gangue as a coarse aggregate in green concrete production: a review
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/931b24c9dca24e1b848c782e6023e1ae
work_keys_str_mv	AT shangao applicationofcoalgangueasacoarseaggregateingreenconcreteproductionareview AT sumeizhang applicationofcoalgangueasacoarseaggregateingreenconcreteproductionareview AT lanhuiguo applicationofcoalgangueasacoarseaggregateingreenconcreteproductionareview
_version_	1718411451955150848

Application of Coal Gangue as a Coarse Aggregate in Green Concrete Production: A Review

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