Interface shear strength of composite concrete-to-concrete bond

Interface shear strength between two concrete layers cast at different times plays an important role to develop composite action of the floor slabs. Most previous studies when quantifying interface shear strength for interface concrete with projecting steel did not take concrete cohesion into consid...

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Main Author:	Mohamad, Mazizah Ezdiani
Format:	Thesis
Language:	English
Published:	2016
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/78750/1/MazizahEzdianiMohamadPFKA2016.pdf
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id	my-utm-ep.78750
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spelling	my-utm-ep.787502018-08-30T08:06:56Z Interface shear strength of composite concrete-to-concrete bond 2016-08 Mohamad, Mazizah Ezdiani TA Engineering (General). Civil engineering (General) Interface shear strength between two concrete layers cast at different times plays an important role to develop composite action of the floor slabs. Most previous studies when quantifying interface shear strength for interface concrete with projecting steel did not take concrete cohesion into consideration. In contrast, interface concrete without projecting steel depended solely on concrete cohesion in quantifying the interface shear strength. Although there are studies conducted on the action of interface shear strength under variable normal stresses, the findings only considered smooth or left “as-cast” surface. Furthermore, Finite Element Modeling (FEM) of the interface shear behavior for concrete-to-concrete bond is also limited in research. In this study, a total of 72 “push-off” tests were carried out to study the interface shear strength of composite slab with six different surface textures. This included smooth or left “as-cast”, roughened by wire-brushing in the longitudinal and transverse direction, groove, indented and projecting steel crossing the interface. Loading was then applied horizontally on the concrete topping until failure was observed under various normal stresses; ?n = 0 N/mm2, 0.5 N/mm2, 1.0 N/mm2 and 1.5 N/mm2. The relationship between surface texture, interface shear strength and normal stress was then proposed in this study. The roughness profile of the concrete base was measured using a portable stylus roughness instrument. 2016-08 Thesis http://eprints.utm.my/id/eprint/78750/ http://eprints.utm.my/id/eprint/78750/1/MazizahEzdianiMohamadPFKA2016.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:111613 phd doctoral Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Mohamad, Mazizah Ezdiani Interface shear strength of composite concrete-to-concrete bond
description	Interface shear strength between two concrete layers cast at different times plays an important role to develop composite action of the floor slabs. Most previous studies when quantifying interface shear strength for interface concrete with projecting steel did not take concrete cohesion into consideration. In contrast, interface concrete without projecting steel depended solely on concrete cohesion in quantifying the interface shear strength. Although there are studies conducted on the action of interface shear strength under variable normal stresses, the findings only considered smooth or left “as-cast” surface. Furthermore, Finite Element Modeling (FEM) of the interface shear behavior for concrete-to-concrete bond is also limited in research. In this study, a total of 72 “push-off” tests were carried out to study the interface shear strength of composite slab with six different surface textures. This included smooth or left “as-cast”, roughened by wire-brushing in the longitudinal and transverse direction, groove, indented and projecting steel crossing the interface. Loading was then applied horizontally on the concrete topping until failure was observed under various normal stresses; ?n = 0 N/mm2, 0.5 N/mm2, 1.0 N/mm2 and 1.5 N/mm2. The relationship between surface texture, interface shear strength and normal stress was then proposed in this study. The roughness profile of the concrete base was measured using a portable stylus roughness instrument.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Mohamad, Mazizah Ezdiani
author_facet	Mohamad, Mazizah Ezdiani
author_sort	Mohamad, Mazizah Ezdiani
title	Interface shear strength of composite concrete-to-concrete bond
title_short	Interface shear strength of composite concrete-to-concrete bond
title_full	Interface shear strength of composite concrete-to-concrete bond
title_fullStr	Interface shear strength of composite concrete-to-concrete bond
title_full_unstemmed	Interface shear strength of composite concrete-to-concrete bond
title_sort	interface shear strength of composite concrete-to-concrete bond
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2016
url	http://eprints.utm.my/id/eprint/78750/1/MazizahEzdianiMohamadPFKA2016.pdf
_version_	1747818062145388544

Interface shear strength of composite concrete-to-concrete bond

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