Long-term monitoring of reinforcement corrosion in concrete using ground penetrating radar

Hong, Shuxian; Wiggenhauser, Herbert; Helmerich, Rosemarie; Dong, Biqin; Peng, Dongdong; Xing, Feng

doi:10.1016/j.corsci.2016.11.003

Cited by 82 publications

(29 citation statements)

References 11 publications

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“…These pathologies have a direct effect on the durability and sustentation of a structure, while the knowledge of their existence might be useful for engineers engaged in the design of maintenance works.3 of 23 superficial defects such as rust when they are in thermal equilibrium with the surroundings because of their different emissivity value. This technique is able to detect corrosion because corroded areas have thermal properties (thermal conductivity and diffusivity) different from that of noncorroded steel rebars [16], in such way that the temperature footprint in the surface where the rebars are located could be different. In the case of cracking, the presence of air in the cracks makes the thermal behavior of the area different from that of the concrete [17].…”

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confidence: 99%

Assessing Rebar Corrosion through the Combination of Nondestructive GPR and IRT Methodologies

Solla

Lagüela

Fernández³

et al. 2019

Remote Sensing

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Corrosion is one of the pathologies that most affects the resistance of reinforced concrete. There are numerous ancient structures still in use affected by corrosion that need proper evaluation and remedial treatment for their maintenance. In this sense, there has been an increasing tendency to use nondestructive testing techniques that do not alter the reinforcement elements of such vulnerable structures. This work presents a combined methodology by using ground penetrating radar (GPR) and infrared thermography (IRT) techniques for the detection and evaluation of corrosion. The methodology was applied to the case study of an old construction that belongs to the abandoned military battery of Cabo Udra (Galicia, Spain). The combination of these complementary techniques allowed for the identification of areas with different dielectric and thermal conductivity, as well as different reflection patterns and intensity of the GPR waves. Thus, from the analysis of the GPR signals and IRT images acquired, it was possible to interpret corroded areas and moisture, along with inner damages such as cracking and debonding. These pathologies have a direct effect on the durability and sustentation of a structure, while the knowledge of their existence might be useful for engineers engaged in the design of maintenance works.

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confidence: 99%

Assessing Rebar Corrosion through the Combination of Nondestructive GPR and IRT Methodologies

Solla

Lagüela

Fernández³

et al. 2019

Remote Sensing

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“…This non-destructive testing (NDT) technique is highly efficient in the detection of metallic objects embedded in concrete or other non-conductive materials because of the high reflectivity of metals and the contrast between the electromagnetic properties of metals and concrete [12][13][14]. In the last decade, several tests using qualitative and comparative analyses have demonstrated clear changes in the radar signal associated with corroded elements [15][16][17][18][19][20]. Those qualitative results confirm this method as a useful tool in corrosion detection, as it presents several advantages over other methods: non-invasive testing, fast data acquisition, and the possibility of survey large areas.…”

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confidence: 99%

Lab Non Destructive Test to Analyze the Effect of Corrosion on Ground Penetrating Radar Scans

et al. 2019

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Corrosion is a significant damage in many reinforced concrete structures, mainly in coastal areas. The oxidation of embedded iron or steel elements degrades rebar, producing a porous layer not adhered to the metallic surface. This process could completely destroy rebar. In addition, the concrete around the metallic targets is also damaged, and a dense grid of fissures appears around the oxidized elements. The evaluation of corrosion is difficult in early stages, because damage is usually hidden. Non-destructive testing measurements, based on non-destructive testing (NDT) electric and magnetic surveys, could detect damage as consequence of corrosion. The work presented in this paper is based in several laboratory tests, which are centered in defining the effect of different corrosion stage on ground penetrating radar (GPR) signals. The analysis focuses on the evaluation of the reflected wave amplitude and its behavior. The results indicated that an accurate analysis of amplitude decay and intensity could most likely reveal an approach to the state of degradation of the embedded metallic targets because GPR images exhibit characteristics that depend on the effects of the oxidized rebar and the damaged concrete. These characteristics could be detected and measured in some cases. One important feature is referred to as the reflected wave amplitude. In the case of corroded targets, this amplitude is lower than in the case of reflection on non-oxidized surfaces. Additionally, in some cases, a blurred image appears related to high corrosion. The results of the tests highlight the higher amplitude decay of the cases of specimens with corroded elements.

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“…On the other hand, ground penetrating radar (GPR), an alternative nondestructive testing (NDT) method, has become a valuable tool for inspection of concrete structures over the past few years [5]. GPR is capable of early detection of reinforcement corrosion in concrete structures [6][7][8][9][10][11]. Based on the capability of the GPR method to investigate corrosion, this paper proposes an assessment of rebar corrosion using GPR on a concrete slab with embedded corroded steel bars.…”

Section: Introductionmentioning

confidence: 99%

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

Zaki

Johari

Hussin

et al. 2018

International Journal of Corrosion

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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.

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Long-term monitoring of reinforcement corrosion in concrete using ground penetrating radar

Cited by 82 publications

References 11 publications

Assessing Rebar Corrosion through the Combination of Nondestructive GPR and IRT Methodologies

Assessing Rebar Corrosion through the Combination of Nondestructive GPR and IRT Methodologies

Lab Non Destructive Test to Analyze the Effect of Corrosion on Ground Penetrating Radar Scans

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

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