Commenced in January 2007
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Calcium Silicate Bricks – Ultrasonic Pulse Method: Effects of Natural Frequency of Transducers on Measurement Results

Authors: Jiri Brozovsky

Abstract:

Modulus of elasticity is one of the important parameters of construction materials, which considerably influence their deformation properties and which can also be determined by means of non-destructive test methods like ultrasonic pulse method. However, measurement results of ultrasonic pulse methods are influenced by various factors, one of which is the natural frequency of the transducers. The paper states knowledge about influence of natural frequency of the transducers (54; 82 and 150kHz) on ultrasonic pulse velocity and dynamic modulus of elasticity (Young's Dynamic modulus of elasticity). Differences between ultrasonic pulse velocity and dynamic modulus of elasticity were found with the same smallest dimension of test specimen in the direction of sounding and density their value decreases as the natural frequency of transducers grew.

Keywords: Calcium silicate brick, ultrasonic pulse method, ultrasonic pulse velocity, dynamic modulus of elasticity.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1096041

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References:


[1] Brozovsky, J. Bricks built in Masonry: Influence of Sounding Techniques and Moisture on Ultrasonic Pulse Velocity During Parameter Determination. Wulfenia, 2013(5), p. 200-209. ISSN 1561- 882X.
[2] Brozovsky, J., Bydzovsky, J. Analysis of relations for determination of parameters of various types of concrete based on ultrasonic pulse method measurement, Advanced Materials Research, 2014(923), p. 99- 107, ISSN 1022-6680.
[3] Brozovsky, J., Dufka, A. To the problems of determination of dynamic elasticity modules of calcium silicate bricks by means of resonance method, Advanced Materials Research, 2014(897), p. 139-143, ISSN 1022-6680.
[4] Brozovsky, J.; Zach, J. Ultrasonic pulse method - the cement strength evaluation tool. Book of 2nd International conference on waste engineering management, Book Series: RILEM Proceedings (73), 2010, p. 314-323. ISBN 978-2-35158-102-5.
[5] Malhotra, V. N.; Carino, N .J. Handbook on nondestructive testing of concrete. 2nd edition, USA: CRC Press, Switzerland, 2004.
[6] Martinček, G.. Nondestructive dynamic testing methods of building materials and structures. Bratiskava:Vydavateľstvo Slovenskejakadémie vied, 1962.
[7] Nichols, J.M., Totoev, Y.Z. Experimental determination of the dynamic modulus of elasticity of masonry units. The 15th Australian Conference on the Mechanics of Structures and Materials, Melbourne 1997, p.1-10
[8] Pande, G.N.,Liang, J.X., Middelton, J. Equivalent elastic moduli for brick masonry. Computers and Geotechnics,1989(01), p.243-265. ISSN 0266-352X.
[9] Salaman, M.M, Al-Amawee, A.H.The ratio between static and dynamic modulus of elasticity in normal and high strength concrete.Journal of Engineering and Development, 2006(2), p.163-174. ISSN 1813-7822
[10] ASTM 597:2009. Standard Test Method for Pulse Velocity ThroughConcrete. USA:American Society for Testing and Materials, 2009.
[11] CSN EN 12504-4:2002. Testing concrete - Part 4: Determination of ultrasonic pulse method. Prague: Czech standards institute, 2002.
[12] ISO 1920-7:2004. Testing of concrete - Part 7: Non-destructive tests on hardened concrete. International Organization for Standardization, 2004.
[13] CSN 731371:2012. Non-destructive testing of concrete - Method of ultrasonic pulse testing of concrete d. Prague: Czech standards institute, 2012.
[14] CSN 731372:2012. Testing Non-destructive testing of concrete - Testing of concrete by resonance method. Prague: Czech standards institute, 2012.