Article (Scientific journals)
Near-to-Surface properties affecting bond strength in concrete repair
Courard, Luc; Piotrowski, Tomasz; Garbacz, Andrzej
2014In Cement and Concrete Composites, 46, p. 73-80
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Keywords :
Concrete; Mechanical interlocking; Repair; Roughness; Microcracking; Pull-off test; Adhesion; Surface treatment
Abstract :
[en] One of the main processes for repairing concrete structures is patch repair. Efficiency and durability of a repaired system depends on the bond between concrete substrate and repair material. By increasing the surface roughness, the surface treatment of concrete substrate can promote mechanical interlocking that is one of the basic mechanisms of adhesion. Nevertheless, some problems may arise from “co-lateral” effects of the treatment, especially due to the development of microcracks inside the substrate. In the presented paper, the effect of concrete substrate surface preparation has been characterized by roughness measurement, description of microcracking in the near-to-surface layer and a pull-off cohesion test. After repair, pull-off bond strength has been evaluated. It is concluded that selection of a suitable surface treatment technique should be preceded by the analysis of its aggressiveness in relation to the concrete substrate strength. A procedure for bond strength estimation using multiple regression approach, based on parameters describing surface quality really generated from various roughening techniques, is then proposed.
Disciplines :
Civil engineering
Author, co-author :
Courard, Luc  ;  Université de Liège - ULiège > Département ArGEnCo > Matériaux de construction non métalliques du génie civil
Piotrowski, Tomasz;  Warsaw University of Technology
Garbacz, Andrzej;  Warsaw University of Technology
Language :
English
Title :
Near-to-Surface properties affecting bond strength in concrete repair
Publication date :
2014
Journal title :
Cement and Concrete Composites
ISSN :
0958-9465
eISSN :
1873-393X
Publisher :
Elsevier
Volume :
46
Pages :
73-80
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
WBI - Wallonie-Bruxelles International [BE]
Funding text :
WBI International, Government of Poland
Available on ORBi :
since 04 December 2013

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