Experimental and analytical study of bio-based epoxy composite materials for strengthening reinforced concrete structures

This paper presents a new approach to strengthen reinforced concrete structures using natural fiber composites. Natural fibers are often used in civil engineering for thermal or acoustic insulation, but rarely are they employed to strengthen structures. Natural fiber composites are constituted of a...

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Autores principales:	Assih Jules, Ivanova Ivelina
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	composite biomaterials reinforced concrete strengthening mechanical behavior Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/2d6be0331e444d01a63d2ec5dbef4207
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spelling	oai:doaj.org-article:2d6be0331e444d01a63d2ec5dbef42072021-12-05T14:11:03ZExperimental and analytical study of bio-based epoxy composite materials for strengthening reinforced concrete structures2191-035910.1515/secm-2021-0024https://doaj.org/article/2d6be0331e444d01a63d2ec5dbef42072021-07-01T00:00:00Zhttps://doi.org/10.1515/secm-2021-0024https://doaj.org/toc/2191-0359This paper presents a new approach to strengthen reinforced concrete structures using natural fiber composites. Natural fibers are often used in civil engineering for thermal or acoustic insulation, but rarely are they employed to strengthen structures. Natural fiber composites are constituted of a matrix based on epoxy adhesive and aligned continuous fiber reinforcements. In this study, we investigate several fibers (carbon, hemp, fiberglass, and linen) in tensile and bending tests. The bending results show twice the magnification of the ultimate bending load in a strengthened specimen. The study also evaluates the stress distribution in the structure. In the case of a beam strengthened by a bonded carbon plate, the functioning of an assembly single lap and the optimal anchor length was determined by analogy. The analytical study describes the shear and peel stresses in the adhesive, composite, and concrete joints, revealing the optimum values of shear stress near the ends of the adhesive joint. The same was observed in concrete. The tests showed the influence of strengthening on the ultimate load and stiffness as well as the concentration of shear stresses at the ends of the adhesive joint.Assih JulesIvanova IvelinaDe Gruyterarticlecompositebiomaterialsreinforced concretestrengtheningmechanical behaviorMaterials of engineering and construction. Mechanics of materialsTA401-492ENScience and Engineering of Composite Materials, Vol 28, Iss 1, Pp 335-342 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	composite biomaterials reinforced concrete strengthening mechanical behavior Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	composite biomaterials reinforced concrete strengthening mechanical behavior Materials of engineering and construction. Mechanics of materials TA401-492 Assih Jules Ivanova Ivelina Experimental and analytical study of bio-based epoxy composite materials for strengthening reinforced concrete structures
description	This paper presents a new approach to strengthen reinforced concrete structures using natural fiber composites. Natural fibers are often used in civil engineering for thermal or acoustic insulation, but rarely are they employed to strengthen structures. Natural fiber composites are constituted of a matrix based on epoxy adhesive and aligned continuous fiber reinforcements. In this study, we investigate several fibers (carbon, hemp, fiberglass, and linen) in tensile and bending tests. The bending results show twice the magnification of the ultimate bending load in a strengthened specimen. The study also evaluates the stress distribution in the structure. In the case of a beam strengthened by a bonded carbon plate, the functioning of an assembly single lap and the optimal anchor length was determined by analogy. The analytical study describes the shear and peel stresses in the adhesive, composite, and concrete joints, revealing the optimum values of shear stress near the ends of the adhesive joint. The same was observed in concrete. The tests showed the influence of strengthening on the ultimate load and stiffness as well as the concentration of shear stresses at the ends of the adhesive joint.
format	article
author	Assih Jules Ivanova Ivelina
author_facet	Assih Jules Ivanova Ivelina
author_sort	Assih Jules
title	Experimental and analytical study of bio-based epoxy composite materials for strengthening reinforced concrete structures
title_short	Experimental and analytical study of bio-based epoxy composite materials for strengthening reinforced concrete structures
title_full	Experimental and analytical study of bio-based epoxy composite materials for strengthening reinforced concrete structures
title_fullStr	Experimental and analytical study of bio-based epoxy composite materials for strengthening reinforced concrete structures
title_full_unstemmed	Experimental and analytical study of bio-based epoxy composite materials for strengthening reinforced concrete structures
title_sort	experimental and analytical study of bio-based epoxy composite materials for strengthening reinforced concrete structures
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/2d6be0331e444d01a63d2ec5dbef4207
work_keys_str_mv	AT assihjules experimentalandanalyticalstudyofbiobasedepoxycompositematerialsforstrengtheningreinforcedconcretestructures AT ivanovaivelina experimentalandanalyticalstudyofbiobasedepoxycompositematerialsforstrengtheningreinforcedconcretestructures
_version_	1718371411102269440

Experimental and analytical study of bio-based epoxy composite materials for strengthening reinforced concrete structures

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