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A platform for research: civil engineering, architecture and urbanism
Interest of coupling several non destructive techniques for diagnosis of concrete structures
Combining several non destructive techniques (NDT) can have an interest since they are sensitive in a different way to the parameters which can possibly influence the concrete state (microcracking, water content, porosity of the plain concrete...). When several parameters (for instance water content and microcracking) are possibly varying in the structure, the inverse analysis is not possible, except if a second technique is used, which enables to uncouple the effects of the different parameters. It is discussed, both from a theoretical point of view and from a practical point of view (on full size structures) what can be the added value combining several techniques. A wide experimental program has been designed, combining on laboratory specimens and on full-size site structures, the use of several non destructive techniques, such as electromagnetic techniques, acoustical techniques or resistivity measurements. Each of these techniques is sensitive to various parameters (porosity, water content, chloride content, microcracking...), thus the interpretation of NDT results in terms of material assessment is not straightforward. The influence of several material parameters (which are varied independently on laboratory specimens) on the global response is analyzed and modelled, focussing mainly on resistivity measurements. The sensitivity to porosity and water content is quantified using empirical modelling and practical applications for a better assessment of structures are discussed.
Interest of coupling several non destructive techniques for diagnosis of concrete structures
Combining several non destructive techniques (NDT) can have an interest since they are sensitive in a different way to the parameters which can possibly influence the concrete state (microcracking, water content, porosity of the plain concrete...). When several parameters (for instance water content and microcracking) are possibly varying in the structure, the inverse analysis is not possible, except if a second technique is used, which enables to uncouple the effects of the different parameters. It is discussed, both from a theoretical point of view and from a practical point of view (on full size structures) what can be the added value combining several techniques. A wide experimental program has been designed, combining on laboratory specimens and on full-size site structures, the use of several non destructive techniques, such as electromagnetic techniques, acoustical techniques or resistivity measurements. Each of these techniques is sensitive to various parameters (porosity, water content, chloride content, microcracking...), thus the interpretation of NDT results in terms of material assessment is not straightforward. The influence of several material parameters (which are varied independently on laboratory specimens) on the global response is analyzed and modelled, focussing mainly on resistivity measurements. The sensitivity to porosity and water content is quantified using empirical modelling and practical applications for a better assessment of structures are discussed.
Interest of coupling several non destructive techniques for diagnosis of concrete structures
Interesse an der Kopplung einiger ZfP-Verfahren zur Diagnose von Betonbauteilen
Breysse, D. (author) / Sirieix, C. (author) / Lataste, J.F. (author) / Balayssac, J.P. (author)
2006
14 Seiten, 13 Bilder, 3 Tabellen, 22 Quellen
Conference paper
Storage medium
English
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