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Effect of surface preparation techniques on the cohesion of superficial concrete: comparison between jack-hammering and water-jetting
Courard, Luc; Bissonnette, Benoît; Belair, Normand
2006In Beushausen, H.; Dehn, F.; Alexander, M. G. (Eds.) Concrete Repair, Rehabilitation and Retrofitting
Peer reviewed
 

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Keywords :
concrete; surface preparation; microcracking
Abstract :
[en] The aim of concrete surface preparation is to obtain a surface with properties similar to those of the bulk concrete. Superficial concrete must be sound, dry, cohesive and contaminant-free. Particularly, the preparation must be performed in such a way that sound and homogeneous concrete is reached. The most widespread surface preparation techniques are sandblasting, jack-hammering, milling and other water hydro-jetting. Evaluation of the effect of surface preparation is often based upon surface roughness or specific sur-face. It is necessary however to investigate further within the first few centimetres from the surface to verify the concrete homogeneity and soundness. Pull-off test is a destructive method that can be useful for such evaluation, but it only gives an indication; the observation of the failure mode is more instructive. This paper summarizes the results of a microscopy investigation performed to quantify the number and length of cracks. The analysis leads to the comparison of jack-hammering and water-jetting techniques in terms of their poten-tial effect on superficial cohesion of concrete.
Disciplines :
Civil engineering
Author, co-author :
Courard, Luc  ;  Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil
Bissonnette, Benoît;  Université Laval, Québec, Canada
Belair, Normand
Language :
English
Title :
Effect of surface preparation techniques on the cohesion of superficial concrete: comparison between jack-hammering and water-jetting
Publication date :
2006
Event name :
International Conference on Concrete Repair, Rehabilitation and Retrofitting
Event place :
Cape Town, South Africa
Event date :
21 - 23 November, 2005
Audience :
International
Main work title :
Concrete Repair, Rehabilitation and Retrofitting
Editor :
Beushausen, H.
Dehn, F.
Alexander, M. G.
Publisher :
Taylor & Francis Group, London, United Kingdom
Pages :
1027-1031
Peer reviewed :
Peer reviewed
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