Compression and shear wave propagation in cemented-sand specimens

• Type: Article in International Scientific Journal
• Date: 2011

Authors

M. F. Amaral (Author) Other; A. Viana da Fonseca (Author) FEUP; M. Arroyo (Author) Other; G. Cascante (Author) Other; Jorge Manuel C. Machado de Carvalho (Author) FEUP

Journal

Title: Geotechnique Letters

Vol. 1

Pages: 79-84

ISSN: 2049-825X

Publisher: ICE Publishing

Indexing

ISI Web of Knowledge - 13 Citations

ISI Web of Science

Scopus - 15 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Environmental engineering

CORDIS: Technological sciences > Engineering > Civil engineering > Geotechnics

Other information

Authenticus ID: P-005-X5B

DOI: 10.1680/geolett.11.00032

Abstract (EN): Ultrasonic and bender element tests in the laboratory are typically used to measure elastic modulus and damping ratio. However, interpretation of the results is challenging for a variety of reasons, including the influence of experimental details, geometrical effects and the analytical techniques used for data processing. It is therefore convenient to cross-check results by performing several independent measurements. Three different types of measurements were performed on cemented-sand specimens. Longitudinal waves or constrained compressional waves in a cylindrical specimen were generated in a high-frequency range (20-70 kHz) using a newly designed transducer interface. Full dynamic characterisation was made possible by independent measurement of the transducer response. Pure unconstrained compressional waves or simply compression waves were measured in the same specimens with high-frequency transducers. The shear modulus was computed and used to predict the arrival of shear waves on independent bender element measurements. The predicted arrival was close to first-break estimates, and bender measurements were therefore confidently employed to track cement curing effects on a different set of specimens. The specimen frequency response function obtained from the longitudinal wave measurements was examined in detail and damping ratios were estimated for the compression vibration modes in a rod.

Language: English

Type (Professor's evaluation): Scientific

Notes: http://www.icevirtuallibrary.com/content/article/10.1680/geolett.11.00032

No. of pages: 6