Auscultation des gaines de post-tension : méthode non destructive par radar dans le béton précontraint

Authors: Charotte, Lucie
Advisor: Bastien, JoséeBissonnette, Benoît
Abstract: This project focuses on auscultation of post-tensioning ducts in prestressed concrete structures. After some background on prestressing, a literature review was conducted to select a non-destructive assessment method that would be most appropriate for detecting grout voids. Following the review, the auscultation radar method has been selected and examined in detail in order to identify its limitations and to propose and implement an appropriate experimental testing program. The selection of the method was not solely based on the litterature review but was also dictated by the choice to concentrate the study on plastic ducts. Althougth these ducts are relatively new on the market, it is expected that, in a near future, they will become commonly used in high aggressive environment. Seven concrete block samples containing 14 identical prestressing plastic ducts were injected with cimentious grout with different filling degree (no grout to entirely fill duct) and were installed at different locations within the concrete samples. This project is a first step towards improving our detection knowledge of plastic prestressing ducts by the radar method. Nevertheless, the study of the influence of ciment grout (degree of filling) gave good research perspectives to improve the performance of the radar measurement analysis and its use for the detection of grout voids often associated with the degradation of post-tensioning cables by corrosion.
Document Type: Mémoire de maîtrise
Issue Date: 2014
Open Access Date: 20 April 2018
Grantor: Université Laval
Collection:Thèses et mémoires

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