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Geoscientific Instrumentation, Methods and Data Systems An interactive open-access journal of the European Geosciences Union
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Volume 5, issue 2 | Copyright
Geosci. Instrum. Method. Data Syst., 5, 567-574, 2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 15 Dec 2016

Research article | 15 Dec 2016

Application of ground-penetrating radar technique to evaluate the waterfront location in hardened concrete

Isabel Rodríguez-Abad1, Gilles Klysz2, Rosa Martínez-Sala1, Jean Paul Balayssac2, and Jesús Mené-Aparicio1 Isabel Rodríguez-Abad et al.
  • 1Universitat Politècnica de València, Camino de Vera s/n, Valencia, 46022, Spain
  • 2LMDC, Université de Toulouse, INSAT, UPS, Toulouse, France

Abstract. The long-term performance of concrete structures is directly tied to two factors: concrete durability and strength. When assessing the durability of concrete structures, the study of the water penetration is paramount, because almost all reactions like corrosion, alkali–silica, sulfate, etc., which produce their deterioration, require the presence of water. Ground-penetrating radar (GPR) has shown to be very sensitive to water variations. On this basis, the objective of this experimental study is, firstly, to analyze the correlation between the water penetration depth in concrete samples and the GPR wave parameters. To do this, the samples were immersed into water for different time intervals and the wave parameters were obtained from signals registered when the antenna was placed on the immersed surface of the samples. Secondly, a procedure has been developed to be able to determine, from those signals, the reliability in the detection and location of waterfront depths. The results have revealed that GPR may have an enormous potential in this field, because excellent agreements were found between the correlated variables. In addition, when comparing the waterfront depths calculated from GPR measurements and those visually registered after breaking the samples, we observed that they totally agreed when the waterfront was more than 4cm depth.

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Short summary
When assessing concrete structures durability, the study of the water penetration is critical, because almost all deterioration reactions require the presence of water. Due to the nondestructive nature of ground-penetrating radar (GPR) technique, the objective of this study is, firstly, to assess water penetration depths in concrete from GPR wave parameters. Secondly, a procedure was developed to be able to determine, from GPR signals, the location of waterfront depths.
When assessing concrete structures durability, the study of the water penetration is critical,...