Continuous surface wave and impact methods of measuring the stiffness and density of railway ballast.

Zagyapan, M and Fairfield, Charles A (2002) Continuous surface wave and impact methods of measuring the stiffness and density of railway ballast. NDT & E International, 35 (2). pp. 75-81. ISSN 0963 8695

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Continuous surface wave and transient impact excitation tests were performed on strips of ballast to monitor their compaction. The ballast's shear wave velocity, hence the ratio of its shear modulus and density, increased with depth. Two types of transient excitation tests were carried out: firstly an impact load was applied to the ballast and the resulting transient acceleration measured at various positions. Secondly, two accelerometers at different distances from the impact excitation were used to study the effects of compaction on the transient output signal amplitude and its attenuation. Measured shear wave velocities showed good correlation between amount of compactive effort and ballast stiffness.

Item Type: Article
Print ISSN: 0963 8695
Electronic ISSN: 1879-1174
Uncontrolled Keywords: Railway ballast; Compaction; Density; Measurements; Field inspection; Effects; Shear waves; Impacts; Pulse echoes; Railway engineering;
University Divisions/Research Centres: Faculty of Engineering, Computing and Creative Industries > School of Engineering and the Built Environment
Dewey Decimal Subjects: 600 Technology > 620 Engineering > 625 Engineering of railroads & roads
600 Technology > 620 Engineering > 624 Civil engineering
Library of Congress Subjects: T Technology > TF Railroad engineering and operation
T Technology > TA Engineering (General). Civil engineering (General)
Item ID: 1939
Depositing User: RAE Import
Date Deposited: 20 Feb 2008 17:09
Last Modified: 27 Jan 2015 08:51

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