Search Results - "Derobert, X."

Electromagnetic non-destructive evaluation techniques for the monitoring of water and chloride ingress into concrete: a comparative study by du Plooy, R., Villain, G., Palma Lopes, S., Ihamouten, A., Dérobert, X., Thauvin, B.

“…One of the principal causes of deterioration in reinforced concrete structures is steel corrosion caused by the penetration of aggressive agents into the…”
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Comparative measurements of ground penetrating radars used for road and bridge diagnostics in the Czech Republic and France by Stryk, J., Matula, R., Pospíšil, K., Dérobert, X., Simonin, J.M., Alani, A.M.

“…•In-situ comparative measurements of GPR systems.•Accuracy of measurements: pavement layer thickness and reinforcement position.•Recommendations for…”
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Description of the general outlines of the French project SENSO – Quality assessment and limits of different NDT methods by Balayssac, J.-P., Laurens, S., Arliguie, G., Breysse, D., Garnier, V., Dérobert, X., Piwakowski, B.

“…► This paper describes a French project aiming to propose a methodology for combining NDT methods for the evaluation of concrete. ► The sensitivity of…”
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Use of electromagnetic non‐destructive techniques for monitoring water and chloride ingress into concrete by Villain, G., Ihamouten, A., du Plooy, R., Lopes, S. Palma, Dérobert, X.

“…ABSTRACT This paper deals with the use of three electromagnetic non‐destructive in situ techniques to assess concrete conditions: electrical resistivity,…”
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Development of a multi-ring resistivity cell and multi-electrode resistivity probe for investigation of cover concrete condition by du Plooy, R., Palma Lopes, S., Villain, G., Dérobert, X.

“…Direct Current (DC) electrical resistivity is a material property well known to be sensitive to various aspects of concrete condition related to corrosion…”
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Electromagnetical and ultrasonic characterizations of concretes subjected to internal swelling reactions by Dérobert, X., Villain, G., Palma-Lopes, S., Bouvard-Coconet, V., Decitre, J.M., Jabbour, J., Qu, S., Geffard, J.L., Durand, O., Gugole, G., Abraham, O.

“…Among pathologies of reinforced concrete structures, internal swelling reactions (ISR), including alkali-aggregate reaction and delayed ettringite formation,…”
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Development of a calibration methodology to improve the on-site non-destructive evaluation of concrete durability indicators by Villain, G., Garnier, V., Sbartaï, Z. M., Dérobert, X., Balayssac, J.-P.

“…This paper addresses the use of non-destructive testing (NDT) methods to assess indicators for both the concrete durability (porosity, degree of saturation)…”
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How to combine several non-destructive techniques for a better assessment of concrete structures by Breysse, D., Klysz, G., Dérobert, X., Sirieix, C., Lataste, J.F.

“…Non-destructive techniques are often seen as a practical and efficient way to assess the structural state of existing reinforced concrete structures. However,…”
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EM characterization of concretes focused on water and chloride contents in the frame of multi-linear experimental designs by Derobert, X., Villain, G.

“…This study is devoted to the electromagnetic (EM) characterization of concrete mixes within the ground penetrating radar frequency band. Defining two specific…”
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The use of impulse and stepped‐frequency radar to characterize the hydric behaviour of a porous pavement structure by Dérobert, X., Ihamouten, A., Guilbert, D., Bosc, F., Bernardin, F.

“…ABSTRACT This study focusses on examining the behaviour of an innovative asphalt pavement which is created as a solar energy collector, using non‐destructive…”
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Case study of detection of artificial defects in an experimental pavement structure using 3D GPR systems by Simonin, J.-M, Baltazart, V., Hornych, P., Derobert, X., Thibaut, E., Sala, J., Utsi, V.

“…Over the past years, radar systems have emerged as a powerful non-destructive testing (NDT) technique for pavement surveys. Radar systems have several major…”
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Roadway Interface Analysis with A Support Vector Regression Based Linear Prediction Method Using Stepped-Frequency Radar by Bastard, C. Le, Pan, J., Wang, Y., Todkar, S. S., Ihamouten, A., Derobert, X., Guilbert, D., Sun, M.

“…Ground Penetrating Radar (GPR) is a widely used tool in the management and monitoring of pavement structures. In this paper, we focus on the detection of thin…”
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Assessment of statistical-based clutter reduction techniques on ground-coupled GPR data for the detection of buried objects in soils by Tebchrany, E., Sagnard, F., Baltazart, V., Tarel, J.-P, Derobert, X.

“…A bi-static Ground Penetrating Radar (GPR) has been developed for the detection of cracks and buried pipes in urban grounds. It is made of two shielded Ultra…”
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Recent developments of EM non-destructive testing in the radar frequency-band for the evaluation of cover concretes by Derobert, X., Villain, G., Ihamouten, A.

“…This paper deals with the recent developments in France on the use of electromagnetic (EM) non-destructive techniques (NDT) to assess indicators of concrete…”
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Characterization of random fields from NDT measurements: A two stages procedure by Schoefs, F., Bastidas-Arteaga, E., Tran, T.V., Villain, G., Derobert, X.

“…•We propose a two stages methodology for characterization of random fields.•It aims at optimizing the number and location of measures under quality…”
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Parametric study on processing GPR signals to get a dispersion curve by Xiao, X., Ihamouten, A., Villain, G., Derobert, X.

“…The knowledge of moisture content in surface concrete structure is a major subject of interest frequently studied by ground-penetrating radar (GPR) techniques…”
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GPR performances for thickness calibration on road test sites by Fauchard, C, Dérobert, X, Cariou, J, Côte, Ph

“…This paper presents ground penetrating radar (GPR) experiments conducted on a number of road test sites. In its capacity as a State civil engineering research…”
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Use of electromagnetic waves propagating in multilayer waveguide to characterize water transfer in concrete by Xiao, X., Derobert, X., Villain, G., Ihamouten, A.

“…Water content, known as one of the most important durability monitoring parameters of concrete, has been widely studied by GPR under homogeneous conditions. In…”
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Comparison of NDT techniques on a post-tensioned beam before its autopsy by Dérobert, X, Aubagnac, C, Abraham, O

“…Following the complete demolition of a prestressed concrete bridge in southern France, a suspected weak post-tensioned beam was retained for non-destructive…”
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On Variants of the Frequency Power Law for the Electromagnetic Characterization of Hydraulic Concrete by Ihamouten, A., Chahine, K., Baltazart, V., Villain, G., Derobert, X.

“…The objective of this paper is threefold: First, dielectric permittivity measurements on concrete specimens are compared among the different variants of…”
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