ORBi: Perez Fabien - Correlation between the roughness of the substrate surface and the debonding risk

Reference : Correlation between the roughness of the substrate surface and the debonding risk


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Civil engineering
	To cite this reference:	http://hdl.handle.net/2268/17618

Title :	Correlation between the roughness of the substrate surface and the debonding risk
Language :	English
Author, co-author :	Perez, Fabien [ > > ]
	Morency, Maxim [ > > ]
	Bissonnette, Benoît [ > > ]
	Courard, Luc [Université de Liège - ULg > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil >]
Publication date :	2009
Main document title :	Concrete Repair, Rehabilitation and Retrofitting II
Editor :	Alexander, M. G.
	Beushausen, H.-D.
	Dehn, F.
	Moyo, P.
Publisher :	CRC Press/Balkema
Pages :	347-348
Peer reviewed :	Yes
On invitation :	No
Audience :	International
ISBN :	978-0-415-46850-3
City :	Leiden
Country :	The Netherlands
Event name :	2nd International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR)
Event date :	du 24 au 26 novembre 2008
Event organizer :	H. Beushausen, F. Dehn and M.G. Alexander
Event place (city) :	Cape Town
Event country :	South Africa
Abstract :	[en] This paper presents the influence of substrate surface preparation on the adhesion strength of repaired beams system. Bond between new and old concrete has been the subject of a number of investigations, but in most cases, only adhesion strength was addressed. This parameter was used to estimate the durability and/or the debonding risk for repaired structure and it’s a generally accepted auditing standards. Usually, surface preparation of the substrate concrete is considered essential to achieve a durable repair because of its influence on the bond strength. To better understand debonding mechanism, in particular these related to surface preparation, roughness parameters were calculated to quantify the influence of surface preparation on the structural behaviour. Using this approach, repair beams prepared by way of four (4) concrete surface preparations were characterized. Results obtained show that repaired beams presenting a substrate with a rough surface permit to achieve a monolithic behaviour of the repaired system. Opposite structural behaviour, with large debonding, was recorded for those having smooth surface. However, all surface preparations used have promoted the same bond strength regardless the roughness of the substrate. The resulting analysis highlights the relation between roughness parameter αrough and the debonding mechanism of repaired beams. Such results will be useful to better predict the performance of concrete repairs.
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/17618

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