Characterization and Classification of Rocks with Lamb Modes

Abassi, Dris El; Faiz, Bouazza; Ibhi, Abderahmane; Aboudaoud, Idris

doi:10.4236/ijg.2012.33057

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…The Poisson coefficient ν and the Young's modulus E are related to the propagation of ultrasonic waves in contact with the gypsum sample, in particular to the longitudinal and transverse velocities of the ultrasonic waves C L and C T , respectively [19]. The Poisson coefficient is linked to the ratio of longitudinal and transverse velocities as [21]:…”

Section: Ultrasonic Waves and Mechanical Propertiesmentioning

confidence: 99%

Characterization of Natural Gypsum Materials and Their Composites for Building Applications

et al. 2019

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Building retrofitting plays a key-role in energy saving and a growing interest is focused on insulating materials that allow a reduction in heat loss from envelopes with low thickness, by a process of reducing heating and cooling demand. In this context, a complete characterization of the physical properties of Moroccan natural gypsum materials was carried out. Basic information on the mineralogical, microstructure, thermal, mechanical, and acoustic characteristics of the rocks sampled from two Moroccan regions is provided. It was found that mineralogy, porosity, and water content are the main factors governing the development of the structure and the strength of the samples. The measured values of the porosity were 8.94%, the water content varied between 2.5–3.0% for the two studied typologies, coming from Agadir and Safi, respectively. Gypsum powder was used for fabricating samples, which were investigated in terms of thermal and acoustic performance. Thermal properties were measured by means of a hot disk apparatus and values of conductivity of 0.18 W/mK and 0.13 W/mK were obtained for Agadir and Safi Gypsum, respectively. The acoustic performance was evaluated in terms of absorption coefficient and sound insulation, measured by means of a Kundt’s Tube (ISO 10534-2). The absorption coefficients were slightly higher than the ones of conventional plasters with similar thickness. A good sound insulation performance was confirmed, especially for Safi Gypsum, with a transmission loss-value up to about 50 dB at high frequency.

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Section: Ultrasonic Waves and Mechanical Propertiesmentioning

confidence: 99%

Characterization of Natural Gypsum Materials and Their Composites for Building Applications

et al. 2019

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“…This allows to easily characterizing the degree of anisotropy of the material and to identify the axes of material symmetry (this is the so-called classification problem). Once evaluated the kind of anisotropy, it is possible to determine the elastic moduli starting from the measurement of the speed of ultrasonic waves propagating in suitable directions (cf., e.g., [1], [3], [4], [7], [8], [14]).…”

Section: Introductionmentioning

confidence: 99%

Mechanical Characterization of Apricena Marble by Ultrasonic Immersion Tests

Castellano

Foti

Fraddosio

et al. 2014

KEM

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We characterize the elastic response of Apricena marble by using advanced ultrasonic nondestructive techniques. An innovative experimental device for ultrasonic immersion tests is employed for the determination of ultrasonic velocities of waves travelling into the sample for any angle of propagation. The interpretation of the experimental results within the theoretical framework of wave propagation in elastic materials allows for both the classification of the anisotropy and the determination of the elastic moduli.

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