Title:
Concrete Removal Techniques
Author(s):
Benoit Bissonnette, Luc Courard, Alexander M. Vaysburd, and Normand Belair
Publication:
Concrete International
Volume:
28
Issue:
12
Appears on pages(s):
49-55
Keywords:
hand-held breaker; repair; roughness; sandblasting; scarifying; surface preparation; water-jetting
DOI:
Date:
12/1/2006
Abstract:
The results of an investigation to evaluate the mechanical degradation induced by different surface preparation techniques are presented. Observations made using an optical microscope clearly show that more cracking is induced with hand-held breakers than with other techniques and that the cracking density increases with increased breaker weight. These results and the results of bond strength tests indicate that techniques such as sandblasting, scarifying, and water-jetting are preferable, as they clearly leave fewer defects in the substrate.