Numerical and Experimental Study of Crack Depth Measurement in Concrete Using Diffuse Ultrasound

Seher, Matthias; In, Chi‐Won; Kim, Jin-Yeon; Kurtis, Kimberly E.; Jacobs, Laurence J.

doi:10.1007/s10921-012-0161-9

Cited by 39 publications

(22 citation statements)

References 14 publications

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“…the macroscopic transport of ultrasonic energy) can be well approximated by the dissipative diffusion equation [3]. The ultrasonic energy by multiple scattering in a linear elastic body B is described by the following second order partial differential equation (6), which describes the time evolution of the spectral energy density…”

Section: Diffuse Ultrasonic Techniquementioning

confidence: 99%

“…It is known that diffusivity is very sensitive to small distributed defects such as micro-cracks and the dissipation is sensitive to energy-absorbing properties of the cement paste in concrete. For the experimental procedure to measure these diffuse parameters in concrete, please refer to [3].…”

Section: Diffuse Ultrasonic Techniquementioning

confidence: 99%

“…Therefore, measurements for the attenuation and diffraction correction are conducted and reflected in the calculation for the nonlinearity parameter. Finally, diffuse ultrasonic NDE measurements [3] are examined as an alternative way to assess the carbonation effects in concrete are also conducted and the results from both methods are compared.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nondestructive detection and characterization of carbonation in concrete

Kim¹,

In²,

Kim³

et al. 2014

AIP Conference Proceedings

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Nondestructive technique to detect a crack in a concrete block by precise estimation of the surface wave Nondestructive evaluation methods used to detect and characterize explosives in terrorist devices AIP Conf.Abstract. Exposure of concrete to the environment leads to changes in composition, microstructure, and properties; these effects often start from the surface of a concrete structure. A specific, widespread environmental effect is carbonation, where carbon dioxide penetrates the surface of concrete and reacts with calcium hydroxide that is a product of Portland cement hydration in concrete. Carbonation is of interest not only because it can lead to the initiation of reinforcement corrosion, but also carbon is increasingly used during curing to alter the surface properties of cement-based materials as a method to "sink" carbon in cement-based materials. Nonlinear Rayleigh surface wave measurements are performed on uncarbonated and carbonated concrete samples to assess any mechanical changes induced by carbonation,. In order to minimize the effects of contact conditions, the generated signals are detected by a noncontact air-coupled transducer (100 kHz) of carbonation. To more accurately analyze the data, corrections are made for the effects of attenuation and diffraction. A comparison between the carbonated and uncarbonated samples demonstrates that pores and micro-cracks are affected by the carbonation product and these significantly change the measured nonlinearity parameter.

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Section: Diffuse Ultrasonic Techniquementioning

confidence: 99%

Section: Diffuse Ultrasonic Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nondestructive detection and characterization of carbonation in concrete

Kim¹,

In²,

Kim³

et al. 2014

AIP Conference Proceedings

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“…For CMOD, it is easily measurable. In terms of crack depth, for many kinds of cracks such as 3D cracks and cracks with complex configurations, the crack depth has been successfully measured using ultrasonic techniques (Chang and Wang 1997;Seher et al 2013). Therefore, this method provides a potential non-destructive test and evaluation (NDT & E) approach for structure health monitoring of existing RC structures where the COD profile is unmeasurable.…”

Section: Discussionmentioning

confidence: 99%

Estimation of the Rebar Force in RC Members from the Analysis of the Crack Mouth Opening Displacement Based on Fracture Mechanics

Deng

Mutoh

2017

ACT

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A method for estimating the rebar force crossing a crack under model I loading in RC beams using the crack mouth opening displacement (CMOD) is proposed based on fracture mechanics accounting for bond slip at rebar-concrete interface. In the method, a CMOD is regarded as a consequence of the combined action of applied loads, rebar bridging forces and the bond slip. The CMOD due to these three contributors are estimated through an integral transformation based on fracture mechanics and a bond slip model. Since the CMOD due to bond slip is included, the tension stiffness effect is considered implicitly. Theoretically, the rebar force is estimated through the proposed method and the inverse analysis of COD profile using the same noisy synthetic COD profile. The smaller error of the proposed method in most cases demonstrates its reliability. The proposed method is further investigated through estimating the rebar force of an RC beam subjected to four-point bending load in laboratory, where acceptable accuracy is achieved. Conclusively, as the proposed method is dedicated to rebar force estimation of an RC member using CMOD, it provides a potential NDT&E approach for existing structures where the COD profile cannot be measured.

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“…In time domain, the velocity of the ultrasonic signals (derived out of the “time of flight”) is an important parameter of the signal . Other useful information for the characterization or monitoring of concrete structures, mainly based on coda waves, can be provided by the amplitude or energy of the full signal waveform in terms of coda wave interferometry . A transformation into the frequency domain can give further insight into material properties.…”

Section: Introductionmentioning

confidence: 99%

Validation of Self‐Healing Properties of Construction Materials through Nondestructive and Minimal Invasive Testing

Snoeck

Malm

Cnudde

et al. 2018

Adv Materials Inter

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When studying the self‐healing properties of construction materials, a plethora of destructive and nondestructive testing (NDT) techniques can be used. In this review, the applicability of different nondestructive test methods is discussed in detail. The methods can be categorized whether they are used to study the encapsulation and/or protection mechanism of the healing agent, the sequestered healing agent itself, the distribution of healing agents, the trigger mechanism for healing, the healing efficiency, or healing performance. Based on this categorization, nondestructive techniques found in literature are discussed. In this way, a robust understanding of the different techniques can be used for future research on self‐healing construction materials.

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Numerical and Experimental Study of Crack Depth Measurement in Concrete Using Diffuse Ultrasound

Cited by 39 publications

References 14 publications

Nondestructive detection and characterization of carbonation in concrete

Nondestructive detection and characterization of carbonation in concrete

Estimation of the Rebar Force in RC Members from the Analysis of the Crack Mouth Opening Displacement Based on Fracture Mechanics

Validation of Self‐Healing Properties of Construction Materials through Nondestructive and Minimal Invasive Testing

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