Durability Investigation of Carbon Fiber Reinforced Concrete under Salt-Freeze Coupling Effect

In order to study the durability behavior of CFRP (carbon fiber reinforced polymer) reinforced concrete, three category specimens (plain, partially reinforced, and fully reinforced) were selected to investigate its performance variation concerning chlorine salt and salt-freeze coupled environment, w...

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Autores principales:	Yongcheng Ji, Wenchao Liu, Yanmin Jia, Wei Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	CFRP reinforced concrete durability salt-freeze coupling effect chloride ion permeation mechanical properties finite element analysis 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/a99cd73045b84a0cb0ad0de9588591eb
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spelling	oai:doaj.org-article:a99cd73045b84a0cb0ad0de9588591eb2021-11-25T18:14:10ZDurability Investigation of Carbon Fiber Reinforced Concrete under Salt-Freeze Coupling Effect10.3390/ma142268561996-1944https://doaj.org/article/a99cd73045b84a0cb0ad0de9588591eb2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6856https://doaj.org/toc/1996-1944In order to study the durability behavior of CFRP (carbon fiber reinforced polymer) reinforced concrete, three category specimens (plain, partially reinforced, and fully reinforced) were selected to investigate its performance variation concerning chlorine salt and salt-freeze coupled environment, which included the microscopic examination, the distribution of chloride ion concentration, and the compressive properties. By observing the microscopic of the specimens, the surface and cross-section corrosion deterioration was examined with increasing exposure time, and the physical behavior of CFRP and core concrete were discussed. The chloride ion diffusion test exerted that the chloride ion concentration in plain specimens is at least 200 times higher than that of fully reinforced specimens. Therefore, the effectiveness of CFRP reinforcement will be proved to effectively hinder the penetration of chloride ions into the core section. The formula of the time-dependent effect of concrete diffusivity with salt-freeze coupling effect was presented and its accuracy verified. A time-varying finite element model of chloride ion distribution was established by using ABAQUS software. It can be seen from the axial compression test that the strength loss rate of three categories of specimens was varied when subjected to the corrosion environment. Therefore, it is proved that CFRP reinforcement can effectively reduce the deterioration of the specimen’s mechanical properties caused by the exposure environment. The research results can provide technical reference for applying the CFRP strengthened concrete in a severe salt-freeze environment.Yongcheng JiWenchao LiuYanmin JiaWei LiMDPI AGarticleCFRP reinforced concretedurabilitysalt-freeze coupling effectchloride ion permeationmechanical propertiesfinite element analysisTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6856, p 6856 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	CFRP reinforced concrete durability salt-freeze coupling effect chloride ion permeation mechanical properties finite element analysis 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	CFRP reinforced concrete durability salt-freeze coupling effect chloride ion permeation mechanical properties finite element analysis 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 Yongcheng Ji Wenchao Liu Yanmin Jia Wei Li Durability Investigation of Carbon Fiber Reinforced Concrete under Salt-Freeze Coupling Effect
description	In order to study the durability behavior of CFRP (carbon fiber reinforced polymer) reinforced concrete, three category specimens (plain, partially reinforced, and fully reinforced) were selected to investigate its performance variation concerning chlorine salt and salt-freeze coupled environment, which included the microscopic examination, the distribution of chloride ion concentration, and the compressive properties. By observing the microscopic of the specimens, the surface and cross-section corrosion deterioration was examined with increasing exposure time, and the physical behavior of CFRP and core concrete were discussed. The chloride ion diffusion test exerted that the chloride ion concentration in plain specimens is at least 200 times higher than that of fully reinforced specimens. Therefore, the effectiveness of CFRP reinforcement will be proved to effectively hinder the penetration of chloride ions into the core section. The formula of the time-dependent effect of concrete diffusivity with salt-freeze coupling effect was presented and its accuracy verified. A time-varying finite element model of chloride ion distribution was established by using ABAQUS software. It can be seen from the axial compression test that the strength loss rate of three categories of specimens was varied when subjected to the corrosion environment. Therefore, it is proved that CFRP reinforcement can effectively reduce the deterioration of the specimen’s mechanical properties caused by the exposure environment. The research results can provide technical reference for applying the CFRP strengthened concrete in a severe salt-freeze environment.
format	article
author	Yongcheng Ji Wenchao Liu Yanmin Jia Wei Li
author_facet	Yongcheng Ji Wenchao Liu Yanmin Jia Wei Li
author_sort	Yongcheng Ji
title	Durability Investigation of Carbon Fiber Reinforced Concrete under Salt-Freeze Coupling Effect
title_short	Durability Investigation of Carbon Fiber Reinforced Concrete under Salt-Freeze Coupling Effect
title_full	Durability Investigation of Carbon Fiber Reinforced Concrete under Salt-Freeze Coupling Effect
title_fullStr	Durability Investigation of Carbon Fiber Reinforced Concrete under Salt-Freeze Coupling Effect
title_full_unstemmed	Durability Investigation of Carbon Fiber Reinforced Concrete under Salt-Freeze Coupling Effect
title_sort	durability investigation of carbon fiber reinforced concrete under salt-freeze coupling effect
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a99cd73045b84a0cb0ad0de9588591eb
work_keys_str_mv	AT yongchengji durabilityinvestigationofcarbonfiberreinforcedconcreteundersaltfreezecouplingeffect AT wenchaoliu durabilityinvestigationofcarbonfiberreinforcedconcreteundersaltfreezecouplingeffect AT yanminjia durabilityinvestigationofcarbonfiberreinforcedconcreteundersaltfreezecouplingeffect AT weili durabilityinvestigationofcarbonfiberreinforcedconcreteundersaltfreezecouplingeffect
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Durability Investigation of Carbon Fiber Reinforced Concrete under Salt-Freeze Coupling Effect

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