Results 71 to 80 of about 1,131 (107)
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Acoustic emission and ultrasonic pulse velocity of concrete
International Journal of Cement Composites and Lightweight Concrete, 1982Abstract Both acoustic emission and ultrasonic pulse velocity measurements were used to try to monitor the structural integrity of concrete. Specimens in the form of 150 mm cubes were loaded monotonically to failure, and acoustic emission and ultrasonic pulse velocity were measured simultaneously.
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Measurement of velocity of propagation from ultrasonic pulse-echo data
Ultrasound in Medicine & Biology, 1982A method is proposed for determining velocity of propagation of ultrasound in tissue by processing the pulse-echo data obtained from a compound scan. Individual sectors from different transducer positions are reconstructed and a suitable area common to the two sectors is selected.
D E, Robinson, F, Chen, L S, Wilson
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Modifications to Standard Pulse Techniques for Ultrasonic Velocity Measurements
The Journal of the Acoustical Society of America, 1959A description is given of modifications to the “sing-around” and coincidence techniques for velocity measurement. In the case of the “sing-around” method a gate is incorporated which effectively lengthens the ultrasonic path by allowing retriggering on multiply reflected pulses. This allows the use of short solid specimens having low attenuation.
A. Myers, L. Mackinnon, F. E. Hoare
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Studies in ultrasonic pulse velocity of concrete containing GGBFS
Construction and Building Materials, 2013Abstract This paper presents the results of experimental investigations into the time-dependent ultrasonic pulse velocity (UPV) of concrete containing GGBFS. The UPV was determined at the age of 3, 7, 28, 56, 90, 150 and 180 days for twelve concrete mixes using the prism specimens of plain and GGBFS concrete.
Mohd Shariq +2 more
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Concrete Quality Designation based on Ultrasonic Pulse Velocity
Construction and Building Materials, 2016Evaluating the condition of the original concrete of large structures built in the early twentieth century is an important part of safety review programs. However, in most large concrete structures, rehabilitation works have been carried out over the years, and only a limited number of cases have been well documented with regards to what has been done.
Saint-Pierre, François +3 more
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Measurement of the Velocity and Attenuation of Ultrasonic Pulses in the Presence of Noise
Review of Scientific Instruments, 1969The well developed techniques of coherent detection and signal averaging may be used to extend the range and accuracy of measurements of ultrasonic velocity and attenuation. Significant improvements in signal-to-noise ratio are obtained by averaging a coherently detected echo train in a signal averager such as a multichannel analyzer or boxcar ...
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The Ultrasonic Pulse Velocity Method
2003Tarun Naik, V Malhotra, John Popovics
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Concrete Compressive Strength by Means of Ultrasonic Pulse Velocity and Moduli of Elasticity
Materials, 2021Sorin Dan +2 more
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