Attenuation of Ground Penetrating Radar Signal Amplitude in Monitoring Reinforced Steel Corrosion

2013 ◽  
Vol 65 (2) ◽  
Author(s):  
Azfaratul Hani Abd. Ghani ◽  
Syahrul Fithry Senin ◽  
R. Hamid
Keyword(s):  
Ground Penetrating Radar ◽  
Steel Corrosion ◽  
Signal Amplitude ◽  
Radar Signal ◽  
Reinforced Steel ◽  
Ground Penetrating

scholarly journals Influence of Concrete Carbonation on Electromagnetic Permittivity Measured by GPR and Capacitive Techniques

2018 ◽  
Vol 23 (4) ◽  
pp. 443-456
Author(s):  
Xavier Dérobert ◽  
Géraldine Villain ◽  
Jean-Paul Balayssac
Keyword(s):  
Complex Permittivity ◽  
Ground Penetrating Radar ◽  
Low Frequency ◽  
Signal Amplitude ◽  
Radar Signal ◽  
Reinforced Concrete Structures ◽  
Concrete Carbonation ◽  
Ground Penetrating ◽  
Non Destructive ◽  
Non Destructive Techniques

This paper addresses the effect of concrete carbonation on the propagation and dispersion of electromagnetic (EM) waves and the capability of two EM, non-destructive techniques to detect this pathology. A capacitive technique operating at low frequency (around 33 MHz) and a ground penetrating radar (GPR) with a 1.5 GHz antenna were tested for the monitoring of reinforced concrete structures. To better understand the phenomena involved in concrete carbonation, the results of two complementary experimental campaigns were analyzed for saturated concretes. First, the dispersion curves of complex permittivity were measured for both carbonated and non-carbonated samples by a cylindrical coaxial EM cell. Due to carbonation, the permittivity decreased and the level of dispersion reduced slightly. Second, using GPR (coupled at approximately 900 MHz) and capacitive measurements conducted on controlled slabs, it was confirmed that the real part of the relative permittivity decreased within a range of 2 at 33 MHz and a range of 1 to 900 MHz, while the radar signal amplitude increased.

scholarly journals Experimental Assessment of Rebar Corrosion in Concrete Slab Using Ground Penetrating Radar (GPR)

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Ahmad Zaki ◽  
Megat Azmi Megat Johari ◽  
Wan Muhd Aminuddin Wan Hussin ◽  
Yessi Jusman
Keyword(s):  
Ground Penetrating Radar ◽  
Structural Damage ◽  
Concrete Slab ◽  
Steel Corrosion ◽  
Steel Reinforcement ◽  
Reinforcement Corrosion ◽  
Dc Power ◽  
Reinforcement Bar ◽  
Ground Penetrating ◽  
Corrosion Of Steel

Corrosion of steel reinforcement is a major cause of structural damage that requires repair or replacement. Early detection of steel corrosion can limit the extent of necessary repairs or replacements and costs associated with the rehabilitation works. The ground penetrating radar (GPR) method has been found to be a useful method for evaluating reinforcement corrosion in existing concrete structures. In this paper, GPR was utilized to assess corrosion of steel reinforcement in a concrete slab. A technique for accelerating reinforcement bar corrosion using direct current (DC) power supply with 5% sodium chloride (NaCl) solution was used to induce corrosion to embedded reinforcement bars (rebars) in this concrete slab. A 2 GHz GPR was used to assess the corrosion of the rebars. The analysis of the results of the GPR data obtained shows that corrosion of the rebars could be effectively localized and assessed.

Buried target signature extraction from ground-penetrating radar signal: measurements and simulations

2005 ◽  
Vol 4 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Idesbald van den Bosch ◽  
Sébastien Lambot ◽  
Pascal Druyts ◽  
Isabelle Huynen ◽  
Marc Acheroy
Keyword(s):  
Ground Penetrating Radar ◽  
Radar Signal ◽  
Signature Extraction ◽  
Ground Penetrating

Study on Ground Penetrating Radar Signal Denoising Method Based on Surfacelet Transform and 3D Context Model

2014 ◽  
Vol 1010-1012 ◽  
pp. 1272-1275
Author(s):  
Dan Dan Liu ◽  
Zhi Qiu Yang ◽  
Chun Rui Tang
Keyword(s):  
Ground Penetrating Radar ◽  
Three Dimensional ◽  
Radar Signal ◽  
Signal Denoising ◽  
Context Model ◽  
Denoising Method ◽  
Subsurface Environment ◽  
Surface Singularities ◽  
Surfacelet Transform ◽  
Ground Penetrating

The ground penetrating radar and radar wave propagation in the subsurface environment is very complex. All kinds of noise and clutter interference is very serious, and detection echo data is a variety of with clutter. Therefore, the key techniques of data processing is to suppress clutter processing of ground penetrating radar record data. Surfacelet transform can efficiently capture and represent local surface singularities with different sizes. In order to improve the reliability of 3D ground penetrating radar detection results and accuracy, this paper presents a three-dimensional ground penetrating radar signal denoising method based on Surfacelet transform. Using Surfacelet transform and 3D context model for ground penetrating radar (GPR) analog signal to denoising, the noise in the case of low signal noise ratio (SNR) still can obtain a better result, and the simulations prove the effectiveness of the method.

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