Review of Nondestructive Testing Methods for Condition Monitoring of Concrete Structures

Verma, Sanjeev Kumar; Bhadauria, Sarita Singh; Akhtar, Saleem

doi:10.1155/2013/834572

Cited by 129 publications

(75 citation statements)

References 62 publications

(61 reference statements)

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“…The measurement of radiation is achieved by the thermal sensor of an infrared (IR) camera [4], presenting a large number of applications ranging from medical imaging [5] to infrastructure inspections [6]. It is important to note that, depending on the performance required, IRT can be combined with other NDT methods, as this would increase confidence, deepen the analysis and make the validation of the particular study results more robust [2]. For example, Solla et al [7] and Sfarra et al [8] combine the Ground Penetrating Radar (GPR) and optical and ultrasonic techniques with IRT, respectively.…”

Section: Theory Of Infrared Thermographymentioning

confidence: 99%

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Infrared Thermography’s Application to Infrastructure Inspections

2018

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Health monitoring and prediction in different types of structures is essential in order to maintain optimal conditions. Some of the pathologies that affect their structural stability are characterized by distinct thermal properties compared to unaltered areas. Infrared thermography (IRT) is a technique based on the acquisition of the thermal radiation of the bodies using thermal sensors of infrared (IR) cameras, which produce an image of the thermal infrared radiation captured through the conversion of the radiation values to temperature values. Therefore, this technique can be used in different studies to analyse structures with one or more pathologies based on their anomalous thermal behaviour with regard to the unaltered surroundings. As a consequence, this review presents various IRT applications to infrastructure inspections, showing the utility of the technique.

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Section: Theory Of Infrared Thermographymentioning

confidence: 99%

“…For this purpose, it is fundamental to use the best methods of inspection, with continuous updates and improvements [2].…”

Section: Introductionmentioning

confidence: 99%

Infrared Thermography’s Application to Infrastructure Inspections

2018

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“…The drawbacks of AE include its inability to detect preexisting damage and its susceptibility to ambient noise [12].…”

Section: Multifunctional Cement Composites Enhanced With Carbon Nanotmentioning

confidence: 99%

Multifunctional Cement Composites Enhanced With Carbon Nanotube Thin Film Interfaces

2016

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Abstract-Concrete and other cementitious composites used in civil infrastructure are prone to many forms of damage. For example, cracks could occur and propagate to cause catastrophic component or system-level failure. Therefore, the objective of this study was to nano-engineer a self-sensing cementitious composite that could detect and locate damage. Integration of multi-walled carbon nanotubes (MWNT) in the mortar mix design and during casting enhanced the electromechanical or sensing properties of the cementitious composites. Instead of directly dispersing MWNTs in the cement matrix, the cement-particle interface was modified using spray-coated MWNT-latex thin films deposited directly onto dry sand particles prior to mortar casting. This procedure preserved MWNT dispersions within the thin film architecture, used minimal amounts of MWNTs, was scalable, and provided dramatic sensing performance enhancements. The mechanical and electromechanical properties of mortar specimens were characterized using compressive cyclic load tests. Furthermore, an electrical resistance tomography (ERT) algorithm was used for mapping mortar specimens' spatial resistance distributions. Since their resistance was pre-calibrated to strain, localized changes in calculated resistance indicated damage. Spatial damage detection was validated by drilling holes in various locations in cementitious composite plates and then by mapping resistance distributions using ERT.Index Terms-carbon nanotube, cement composite, damage detection, electrical resistance tomography, multifunctional material, thin film, structural health monitoring.

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“…Another application of the NDT technique also can be used in the assessment of water content and concrete quality as reported by Breysse et al [6]. Several available NDT methods developed and used in the last few decades have been reviewed [2,7,8] and they concluded that the NDT methods are known to be better for assessing and evaluating the condition of RC structures in practice. In other words, the NDT method plays an important role in the assessment of existing structures.…”

Section: Introductionmentioning

confidence: 99%

Application of NDT apparatus for possible use as structural health monitoring of concrete building in the field

2018

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Abstract.A condition assessment of reinforced concrete building structures can be conducted accurately when the components of the building structure data are available. Otherwise, data must be developed through testing directly in the field. Non-Destructive Test method (NDT) was considered to avoid disruptions to the existing building structures. This study aims to develop a model for interpreting the residual strength of concrete structures in the field. Nine cylinder specimens with a diameter of 150 mm and a height of 300 mm and 27 cube specimens of 200x200x200 mm were prepared. Nine reinforced concrete beam specimens of 100x150x1100 mm were also prepared to represent a component of the reinforced concrete structure. Hammer and UPV apparatuses were applied to the cylinder and cube specimens considered. Results concluded that the value of the pulse velocity is directly proportional to the load and inversely proportional to the residual strength. The concrete structure with a residual strength of more than 60% is considered healthy or a structural in "good" condition. The concrete structure is also healthy when the v measured gives a value of 3.5 and above. This value is acceptable as it lies within the range v given in the reference of 3.5 to 4.5.

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Review of Nondestructive Testing Methods for Condition Monitoring of Concrete Structures

Cited by 129 publications

References 62 publications

Infrared Thermography’s Application to Infrastructure Inspections

Infrared Thermography’s Application to Infrastructure Inspections

Multifunctional Cement Composites Enhanced With Carbon Nanotube Thin Film Interfaces

Application of NDT apparatus for possible use as structural health monitoring of concrete building in the field

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