Experimental Study on Mechanical Properties of Steel-Polyvinyl Alcohol Fibre-Reinforced Recycled Concrete

Research on the utilization of recycled concrete in civil engineering applications is gaining popularity world-wide due to the increased efforts to promote preservation of the environment and sustainable development. Recycled concrete is, however, presently still limited to nonstructural application...

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Autores principales:	Haicheng Niu, Lei Wang, Jianhua Li, Jiakun Ji
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	recycled concrete steel fibre polyvinyl alcohol fibre fibre characteristic value mechanical properties stress–strain curve Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/a388afa95c5243c4a17c2aad9ff7ab30
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spelling	oai:doaj.org-article:a388afa95c5243c4a17c2aad9ff7ab302021-11-25T16:31:18ZExperimental Study on Mechanical Properties of Steel-Polyvinyl Alcohol Fibre-Reinforced Recycled Concrete10.3390/app1122105502076-3417https://doaj.org/article/a388afa95c5243c4a17c2aad9ff7ab302021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10550https://doaj.org/toc/2076-3417Research on the utilization of recycled concrete in civil engineering applications is gaining popularity world-wide due to the increased efforts to promote preservation of the environment and sustainable development. Recycled concrete is, however, presently still limited to nonstructural applications. This is due to the poor mechanical properties of recycled concrete, which make it difficult to cope with complex mechanical environments. Therefore, an experimental work is presented to investigate the mechanical behaviour of recycled concrete, focusing on the cube, flexural, and uniaxial compressive mechanical properties of steel-polyvinyl alcohol fibre-doped specimens. The test results showed that the compressive strength and the flexural strength of the recycled concrete increased by 6.0% and 55.2%, respectively, when steel fibre was single-incorporated. The cubic compressive strength of the recycled concrete decreased by 14.1% when polyvinyl alcohol fibre was single-incorporated, but there was a 47.9% increase in the flexural strength of recycled concrete. Based on these tests, the elastic modulus, the Poisson’s ratio, and the uniaxial compression toughness were digitised to derive mathematical expressions that provided a theoretical understanding of the mechanical properties of steel-polyvinyl alcohol fibre-reinforced recycled concrete. Moreover, combining the characteristics of the uniaxial compressive stress–strain curve of fibre-reinforced recycled concrete, an equation for the uniaxial compressive stress–strain curve of recycled concrete associated with the fibre characteristic value was established, which agreed well with the test results.Haicheng NiuLei WangJianhua LiJiakun JiMDPI AGarticlerecycled concretesteel fibrepolyvinyl alcohol fibrefibre characteristic valuemechanical propertiesstress–strain curveTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10550, p 10550 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	recycled concrete steel fibre polyvinyl alcohol fibre fibre characteristic value mechanical properties stress–strain curve Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	recycled concrete steel fibre polyvinyl alcohol fibre fibre characteristic value mechanical properties stress–strain curve Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Haicheng Niu Lei Wang Jianhua Li Jiakun Ji Experimental Study on Mechanical Properties of Steel-Polyvinyl Alcohol Fibre-Reinforced Recycled Concrete
description	Research on the utilization of recycled concrete in civil engineering applications is gaining popularity world-wide due to the increased efforts to promote preservation of the environment and sustainable development. Recycled concrete is, however, presently still limited to nonstructural applications. This is due to the poor mechanical properties of recycled concrete, which make it difficult to cope with complex mechanical environments. Therefore, an experimental work is presented to investigate the mechanical behaviour of recycled concrete, focusing on the cube, flexural, and uniaxial compressive mechanical properties of steel-polyvinyl alcohol fibre-doped specimens. The test results showed that the compressive strength and the flexural strength of the recycled concrete increased by 6.0% and 55.2%, respectively, when steel fibre was single-incorporated. The cubic compressive strength of the recycled concrete decreased by 14.1% when polyvinyl alcohol fibre was single-incorporated, but there was a 47.9% increase in the flexural strength of recycled concrete. Based on these tests, the elastic modulus, the Poisson’s ratio, and the uniaxial compression toughness were digitised to derive mathematical expressions that provided a theoretical understanding of the mechanical properties of steel-polyvinyl alcohol fibre-reinforced recycled concrete. Moreover, combining the characteristics of the uniaxial compressive stress–strain curve of fibre-reinforced recycled concrete, an equation for the uniaxial compressive stress–strain curve of recycled concrete associated with the fibre characteristic value was established, which agreed well with the test results.
format	article
author	Haicheng Niu Lei Wang Jianhua Li Jiakun Ji
author_facet	Haicheng Niu Lei Wang Jianhua Li Jiakun Ji
author_sort	Haicheng Niu
title	Experimental Study on Mechanical Properties of Steel-Polyvinyl Alcohol Fibre-Reinforced Recycled Concrete
title_short	Experimental Study on Mechanical Properties of Steel-Polyvinyl Alcohol Fibre-Reinforced Recycled Concrete
title_full	Experimental Study on Mechanical Properties of Steel-Polyvinyl Alcohol Fibre-Reinforced Recycled Concrete
title_fullStr	Experimental Study on Mechanical Properties of Steel-Polyvinyl Alcohol Fibre-Reinforced Recycled Concrete
title_full_unstemmed	Experimental Study on Mechanical Properties of Steel-Polyvinyl Alcohol Fibre-Reinforced Recycled Concrete
title_sort	experimental study on mechanical properties of steel-polyvinyl alcohol fibre-reinforced recycled concrete
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a388afa95c5243c4a17c2aad9ff7ab30
work_keys_str_mv	AT haichengniu experimentalstudyonmechanicalpropertiesofsteelpolyvinylalcoholfibrereinforcedrecycledconcrete AT leiwang experimentalstudyonmechanicalpropertiesofsteelpolyvinylalcoholfibrereinforcedrecycledconcrete AT jianhuali experimentalstudyonmechanicalpropertiesofsteelpolyvinylalcoholfibrereinforcedrecycledconcrete AT jiakunji experimentalstudyonmechanicalpropertiesofsteelpolyvinylalcoholfibrereinforcedrecycledconcrete
_version_	1718413155869130752

Experimental Study on Mechanical Properties of Steel-Polyvinyl Alcohol Fibre-Reinforced Recycled Concrete

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