Evaluation of freeze–thaw damage in concrete by ultrasonic imaging

Molero, M.; Aparicio, S.; Al‐Assadi, Ghaida; Casati, M. J.; Hernández, Melchor G.; Anaya, J.J.

doi:10.1016/j.ndteint.2012.05.004

Cited by 87 publications

(44 citation statements)

References 15 publications

(20 reference statements)

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“…Concrete resistance to F-T damage has been evaluated and classified (Molero et al 2012). The causes and mechanisms of F-T external deterioration have been investigated in some research.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Damage in Concrete Suffered Freeze-Thaw Cycles by CT Technique

Tian

Han

2016

ACT

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The evolution and spatial distribution of internal random pore structure are key factors in damage mechanism and macro-mechanical properties of concrete material under freeze-thaw (F-T) environment. This paper was presented to discover the deterioration mechanism of concrete under F-T actions. Through the experiment, visual examination was employed to evaluate the surface damage; the degradation considering the mass loss and uniaxial compressive strength of concrete was statistically analyzed under F-T environment. Moreover, X-ray tomography was adopted to characterize the concrete internal structure subjected to F-T cycles. The specimens exposed to F-T environment were scanned at regular intervals. Coupled with CT test, the pore space was characterized in terms of porosity and pore distribution by image analysis. And the relationship between the pore structure and the F-T cycles was described quantitatively by the fractal theory. The results indicated that the fractal dimension of the pore structure presented "down-up" trend with the number of F-T cycles increasing. The pore structure evolution changed from chaos to order and then to a process of disorder. The results demonstrated that F-T cycles accelerated the generation of meso-damage in concrete, which leads to more severe damage under F-T cycles.

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“…Concrete resistance to F-T damage has been evaluated and classified (Molero et al 2012). The causes and mechanisms of F-T external deterioration have been investigated in some research.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Damage in Concrete Suffered Freeze-Thaw Cycles by CT Technique

Tian

Han

2016

ACT

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“…Existing literature contains a variety of these segmentation methods applied in the domain of NDT. Many of these methods are designed for a particular application, such as the detection of weld defects (Alaknanda et al, ; Vilar et al., ; Yazid et al., ; Kasban et al., ) or pipe deterioration (Peska, ; Liu et al., ), and/or for particular image sources, such as optical (Yazid et al., ), thermal (Abdel‐Qader et al., ; Liu et al., ; Yishuo and Jer‐Wei, ; Heriansyah and Abu‐Bakar, ), ultrasonic (Molero et al., ; D'Orazio et al., ), and radiography (Alaknanda et al, ; Vilar et al., ; Yazid et al., ; Kasban et al., ). As such, while these techniques may be effective for their designated purposes, they are understandably unlikely to perform well when applied to richly detailed, high‐resolution optical images of a broad range of surface types and damage forms in complex natural scenes.…”

Section: Introductionmentioning

confidence: 99%

Regionally Enhanced Multiphase Segmentation Technique for Damaged Surfaces

O’Byrne

Ghosh

Schoefs

et al. 2014

Computer aided Civil Eng

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Imaging‐based damage detection techniques are increasingly being utilized alongside traditional visual inspection methods to provide owners/operators of infrastructure with an efficient source of quantitative information for ensuring their continued safe and economic operation. However, there exists scope for significant development of improved damage detection algorithms that can characterize features of interest in challenging scenes with credibility. This article presents a new regionally enhanced multiphase segmentation (REMPS) technique that is designed to detect a broad range of damage forms on the surface of civil infrastructure. The technique is successfully applied to a corroding infrastructure component in a harbour facility. REMPS integrates spatial and pixel relationships to identify, classify, and quantify the area of damaged regions to a high degree of accuracy. The image of interest is preprocessed through a contrast enhancement and color reduction scheme. Features in the image are then identified using a Sobel edge detector, followed by subsequent classification using a clustering‐based filtering technique. Finally, support vector machines are used to classify pixels which are locally supplemented onto damaged regions to improve their size and shape characteristics. The performance of REMPS in different color spaces is investigated for best detection on the basis of receiver operating characteristics curves. The superiority of REMPS over existing segmentation approaches is demonstrated, in particular when considering high dynamic range imagery. It is shown that REMPS easily extends beyond the application presented and may be considered an effective and versatile standalone segmentation technique.

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“…Many methods have been developed for nondestructive evaluation, e.g. acoustic emission [1,2], infrared thermography [3] or ultrasonic testing [4][5][6][7]. Of particular interest are impact-echo techniques [8,9] and methods based on propagation of elastic waves [10,11].…”

mentioning

confidence: 99%

Experimental Study on Ultrasonic Monitoring of Splitting Failure in Reinforced Concrete

Rucka

Wilde

2013

J Nondestruct Eval

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This paper investigates inspection of reinforced concrete elements sensitive to the splitting failure. The behaviour of a reinforced concrete specimen subjected to a tensile stress is considered. The damage detection procedure is based on the ultrasonic wave propagation technique. The piezoelectric transducers are located on both ends of the specimen and the measurements are taken periodically during the incrementally increased loading. The features of measured signals in time and frequency domains as well as wavelet transforms before and after the splitting failure are studied. The experimental results show that proposed method can be used for monitoring of damage evolution in concrete elements. The method makes possible detection of the moment just before the splitting failure occurs.

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Evaluation of freeze–thaw damage in concrete by ultrasonic imaging

Cited by 87 publications

References 15 publications

Evaluation of Damage in Concrete Suffered Freeze-Thaw Cycles by CT Technique

Evaluation of Damage in Concrete Suffered Freeze-Thaw Cycles by CT Technique

Regionally Enhanced Multiphase Segmentation Technique for Damaged Surfaces

Experimental Study on Ultrasonic Monitoring of Splitting Failure in Reinforced Concrete

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