Relative Effects of Porosity and Grain Size on Ultrasonic Wave Propagation in Marbles

Özkan, Vildan; Sarpün, İ̇smail Hakkı; Tuncel, Sabri

doi:10.1007/978-94-007-0723-8_54

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2019

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“…The principle of the ultrasonic pulse velocity test is sending ultrasonic pulses into the material and measuring their transit time. The pulses travel through different materials at a different velocity, depending on their properties [3]. In concrete it is generally true that the pulse velocity is lower in poor quality concrete or in damaged areas (including micro-defects) [4].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Influence of Transducer Frequency on the Ultrasonic Measurement of Concrete Homogeneity

Kocáb¹,

Misák²,

Jindrová³

et al. 2019

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The paper analyses the influence of transducer frequency on the determination of concrete homogeneity using the ultrasonic pulse velocity test. Transit time measurements were made on a 590×590mm concrete slab, with 110mm in thickness, in a raster of 5×5 points, which means the slab was tested in 25 places. The tests were made using a Pundit PL-200 ultrasonic tester using transducers set at 54, 82, and 150 kHz. Two types of measurements were performed – spot measurements of the ultrasonic pulse transit time at each point and full area scanning. The paper is concluded by an evaluation of the concrete slab’s homogeneity measured by different transducers and techniques in addition to a statistical analysis of how the results are affected by the transducer frequency.

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Section: Introductionmentioning

confidence: 99%