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Evaluation of the mechanical integrity of a concrete surface by means of combined destructive methods
Courard, Luc; Bissonnette, Benoît; Garbacz, Andrzej et al.
2014In Grantham, Michael; Basheer, Muhammed; Magee, Bryan et al. (Eds.) Proceedings of Concrete Solutions
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Keywords :
concrete; surface; pull-off test; rebound hammer
Abstract :
[en] As a tight bond between the repair and the old concrete is required, the soundness of the prepared surface has to be carefully assessed. This paper presents the results of an investigation intended to assess and compare quantitatively different test methods, namely the Schmidt rebound hammer, the pull-out test and the pull-off test, to evaluate superficial mechanical integrity of a substrate after concrete removal operations. Although it does not yield a precise evaluation of compressive strength, the Schmidt rebound hammer test is recognized as a useful tool for performing quick surveys to assess concrete uniformity. The pull-off test is very well correlated with the splitting-tensile test, but it is not suited for vertical and overhead surfaces. The Capo pull-out test has limited interest for surface preparation, as it is applicable to flat surfaces only. Conversely, the accelerated pull-out test showed interesting potential as a simple and relatively rapid means for assessing the mechanical integrity of a concrete surface prior to repair for any type of concrete surface. It appears from the results generated in this study that the combination Schmidt hammer / pull-off test could fill the needs for the evaluation of horizontal surfaces after concrete removal, while the combination Schmidt hammer / accelerated pull-out test could be used effectively on vertical and overhead surfaces.
Disciplines :
Civil engineering
Author, co-author :
Courard, Luc  ;  Université de Liège - ULiège > Département ArGEnCo > Matériaux de construction non métalliques du génie civil
Bissonnette, Benoît;  Université Laval > Génie civil
Garbacz, Andrzej;  Warsaw university of Technology
Vaysburd, Alex;  Vaycon Consulting, Baltimore (U.S.A.)
Language :
English
Title :
Evaluation of the mechanical integrity of a concrete surface by means of combined destructive methods
Publication date :
2014
Event name :
Concrete Solutions - 5th International Conference on Concrete Repair
Event organizer :
Queen's University Belfast
Event place :
Belfast, United Kingdom
Event date :
1 - 3 Deptember 2014
Audience :
International
Main work title :
Proceedings of Concrete Solutions
Editor :
Grantham, Michael
Basheer, Muhammed
Magee, Bryan
Soustsos, Marios
Publisher :
Taylor&Francis Group, London, United Kingdom
ISBN/EAN :
978-1-138-02708-4
Pages :
787-790
Peer reviewed :
Peer reviewed
Available on ORBi :
since 14 June 2014

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