EVALUATION OF THE MATERIAL EMBEDDED IN CONCRETE BY ULTRASONIC AND GPR IMAGES

Author(s): Sofia Aparicio (1), José Vicente Fuente (2), Dalmay Lluveras (1), Miguel A.G. Izquierdo (3), Margarita Gonzáles Hernández (1), José Javier Anaya Velayos (1)
Paper category: Proceedings
Book title: SynerCrete’18 International Conference on Interdisciplinary Approaches for Cement-based Materials and Structural Concrete
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 869-874
Total Pages: 6
Language : English

Abstract: The evaluation of cementitious materials by images from non-destructive techniques has gained prominence during the last years. Ultrasonic Tomography and Ground Penetrating Radar are two non-destructive techniques that are particularly well suited for the inspection of cementitious structures and materials using ultrasonic and electromagnetic waves, respectively. In this paper, these two techniques were used to generate images for the identification of embedded objects in concrete specimens.
A set of concrete specimens were manufactured in which cylindrical bars and pipes of different materials have been embedded, covering a wide range of acoustic and electromagnetic impedances representative of the most common materials found in concrete.
For that purpose, three different types of inclusions were inserted in the concrete specimens: PVC tubes, and aluminium and steel tendons.
The experimental ultrasonic images have been obtained using a portable tomographic inspection system, which has the advantage of needing only two ultrasonic transducers to carry out the inspections. The same mechanical system was used with a commercial GPR using a 2 GHz antenna to generate the GPR images. The positions and diameters of the inclusions have been visualized using tomographic images and the results are discussed.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00