Characterization of ultrasonic properties of concrete

Kim, Byeongchan; Kim, Jin‐Yeon

doi:10.1016/j.mechrescom.2008.07.003

Cited by 34 publications

(11 citation statements)

References 27 publications

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“…Teniendo en cuenta que la velocidad ultrasónica depende de las propiedades elásticas y la densidad del medio en el cual se propague la onda (Malhotra y Carino, 2004), la señal ultrasónica gasta menos tiempo en propagarse en sólidos (concreto y productos de hidratación) y líquidos (agua contenida en los poros y espacios capilares) que en gases (poros llenos de aire o fisuras) (Kim y Kim, 2009). La onda al pasar de un medio sólido a gas se dispersa, causando un aumento en el tiempo de recorrido y por lo tanto afecta los valores de VPU.…”

Section: Vpu=3551570+91027*ln(t)unclassified

“…Este material puede desarrollar gran variedad de propiedades con un campo de aplicación muy amplio. Por ello la importancia de estudiar su comportamiento y desarrollar nuevas tecnologías de monitoreo e inspección que sean confiables y permitan ejercer un control rápido y efectivo sobre estas propiedades, sin alterarlas (Kim, 2009;Shah y Ribakov, 2009). …”

Section: Introductionunclassified

“…Generalmente se emplean palpadores con frecuencias entre 25 y 100 kHz para medir la velocidad de pulso en el concreto (Kraub y Hariri, 2006;Icontec, 2006;Malhotra y Carino, 2004). investigación La velocidad de una onda de compresión a través de un material sólido depende de las propiedades elásticas y de la densidad del medio en que se propague (Qasrawi, 2000;Kim y Kim, 2009;Carcaño y Moreno, 2008). Para la realización de este ensayo no destructivo (END) se puede emplear el método de transmisión directa, en el cual un palpador transmite una onda de compresión dentro del concreto, mientras otro palpador ubicado a una distancia L en la cara opuesta recibe la señal transmitida.…”

Section: Introductionunclassified

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Efecto del contenido de agua sobre la resistencia y la velocidad de pulso ultrasónico del concreto

Ortiz

Hernández

Santos³

2015

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El objetivo del presente trabajo es determinar correlaciones entre el contenido de agua del concreto, la resistencia a la compresión y la velocidad de pulso ultrasónico (VPU). Se estudiaron probetas cilíndricas de concreto de 200 mm de largo x 100 mm de diámetro, elaboradas a partir de una mezcla de cemento Portland tipo I y una relación agua/cemento (a/c) de 0,5. El curado de las muestras se realizó en condiciones estándar y en condiciones ambientales bajo techo, determinando el contenido de agua en cada probeta por diferencia de pesos y sometiendo las muestras a ensayos ultrasónicos y de resistencia a la compresión durante los primeros 28 días después del fraguado. A partir de los resultados obtenidos, se encontró que un modelo de tipo logarítmico puede describir adecuadamente el comportamiento del contenido de agua, la VPU y la resistencia a la compresión en función del tiempo de curado, para cada condición estudiada. Adicionalmente, se verificó que las condiciones de curado investigadas afectan significativamente el contenido de agua del concreto y los valores de resistencia a la compresión y VPU alcanzados.

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Section: Vpu=3551570+91027*ln(t)unclassified

Section: Introductionunclassified

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Efecto del contenido de agua sobre la resistencia y la velocidad de pulso ultrasónico del concreto

Ortiz

Hernández

Santos³

2015

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“…The experimental validation phase of the models not only demonstrates the potential and limitations of this type of model, but also highlights the work which still remains to be accomplished. 3,5,6 The prediction of propagation in a multi-scattering particle medium can be made using the exact calculation of the field scattered by all of the obstacles. However, the large number of scattering particles and the need to know the position, type, size, and shape of each of them rapidly leads this technique to become costly in terms of computation time, and very difficult to implement whenever some of the parameters are random, such as the exact positions and shapes of the scatterers.…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5][6] In the stochastic domain, many dynamic models provide a good description of propagation. The integration of multiple scattering effects combined with the application of a statistical mean to the positions of isotropic scattering particles was initiated by Foldy.…”

Section: Introductionmentioning

confidence: 99%

An experimental evaluation of two effective medium theories for ultrasonic wave propagation in concrete

Chaix¹,

Rossat²,

Garnier³

et al. 2012

The Journal of the Acoustical Society of America

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This study compares ultrasonic wave propagation modeling and experimental data in concrete. As a consequence of its composition and manufacturing process, this material has a high elastic scattering (sand and aggregates) and air (microcracks and porosities) content. The behavior of the "Waterman-Truell" and "Generalized Self Consistent Method" dynamic homogenization models are analyzed in the context of an application for strong heterogeneous solid materials, in which the scatterers are of various concentrations and types. The experimental validations of results predicted by the models are carried out by making use of the phase velocity and the attenuation of longitudinal waves, as measured by an immersed transmission setup. The test specimen material has a cement-like matrix containing spherical inclusions of air or glass, with radius close to the ultrasonic wavelength. The models are adapted to the case of materials presenting several types of scattering particle, and allow the propagation of longitudinal waves to be described at the scale of materials such as concrete. The validity limits for frequency and for particle volume ratio can be approached through a comparison with experimental data. The potential of these homogenization models for the prediction of phase velocity and attenuation in strongly heterogeneous solids is demonstrated.

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Fluidic Ultrasound Generation for Non‐Destructive Testing

Bühling,

Maack,

Strangfeld

2024

Advanced Materials

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Air‐coupled ultrasonic testing (ACU) is a pioneering technique in non‐destructive testing (NDT). While contact testing and fluid immersion testing are standard methods in many applications, the adoption of ACU is progressing slowly, especially in the low ultrasonic frequency range. A main reason for this development is the difficulty of generating high amplitude ultrasonic bursts with equipment that is robust enough to be applied outside a laboratory environment. This paper presents the fluidic ultrasonic transducer as a solution to this challenge. This novel aeroacoustic source uses the flow instability of a sonic jet in a bistable fluidic switch to generate ultrasonic bursts up to 60 kHz with a mean peak pressure of 320 Pa. The robust design allows operation in adverse environments, independent of the operating fluid. Non‐contact through‐transmission experiments are conducted on four materials and compared with the results of conventional transducers. For the first time, it is shown that the novel fluidic ultrasonic transducer provides a suitable acoustic signal for NDT tasks and has potential of furthering the implementation of ACU in industrial applications.This article is protected by copyright. All rights reserved

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Characterization of ultrasonic properties of concrete

Cited by 34 publications

References 27 publications

Efecto del contenido de agua sobre la resistencia y la velocidad de pulso ultrasónico del concreto

Efecto del contenido de agua sobre la resistencia y la velocidad de pulso ultrasónico del concreto

An experimental evaluation of two effective medium theories for ultrasonic wave propagation in concrete

Fluidic Ultrasound Generation for Non‐Destructive Testing

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