Impact-Echo

A technique for determining the mechanical properties of rocks

Moe Momayez, A. Sadri, E. E. Hassani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

This paper presents the first application of the Impact-Echo (IE) technique for detenmning the elastic properties of rocks in the laboratory. The technique was developed at the United States National Institute of Standards and Technology for measuring the thickness and detecting flaws in concrete. It is based on transient stress wave propagation where the stress pulses generated by a mechanical impact at the surface undergo multiple reflections between the top and bottom of a slab. Knowing the thickness of the slab, the P and S wave velocities can be calculated with great accuracy. The dynamic elastic moduli can then be calculated from the measured P and S wave velocities using standard equations. Comparing the results of the Impact-Echo tests with standard static tests and accepted dynamic tests such as ultrasonic and resonance frequency, it is shown that Impact-Echo is the only dynamic testing method that produces the most consistent set of values for elastic properties such as Young's modulus, bulk modulus, shear modulus and Poisson's ratio. In addition, Impact-Echo data are obtained in a fraction of time compared to other testing methods because of minimal sample preparation requirements and data processing techniques. The authors provide a detailed description of the Impact-Echo method along with the results of experiments carried out on five different rock types using static and dynamic testing techniques. Rock Mechanics, Daemen & Schultz (eds).

Original languageEnglish (US)
Title of host publication35th U.S. Symposium on Rock Mechanics, USRMS 1995
Editors Daemen, Schultz
PublisherAmerican Rock Mechanics Association (ARMA)
Pages843-848
Number of pages6
ISBN (Print)9054105526, 9789054105527
StatePublished - Jan 1 1995
Externally publishedYes
Event35th U.S. Symposium on Rock Mechanics, USRMS 1995 - Reno, United States
Duration: Jun 5 1995Jun 7 1995

Other

Other35th U.S. Symposium on Rock Mechanics, USRMS 1995
CountryUnited States
CityReno
Period6/5/956/7/95

Fingerprint

mechanical property
echoes
Elastic moduli
testing method
Rocks
elastic property
mechanical properties
rocks
Mechanical properties
P-wave
wave velocity
S-wave
slab
rock
Testing
bulk modulus
Young modulus
rock mechanics
Poisson ratio
shear modulus

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

Cite this

Momayez, M., Sadri, A., & Hassani, E. E. (1995). Impact-Echo: A technique for determining the mechanical properties of rocks. In Daemen, & Schultz (Eds.), 35th U.S. Symposium on Rock Mechanics, USRMS 1995 (pp. 843-848). American Rock Mechanics Association (ARMA).

Impact-Echo : A technique for determining the mechanical properties of rocks. / Momayez, Moe; Sadri, A.; Hassani, E. E.

35th U.S. Symposium on Rock Mechanics, USRMS 1995. ed. / Daemen; Schultz. American Rock Mechanics Association (ARMA), 1995. p. 843-848.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Momayez, M, Sadri, A & Hassani, EE 1995, Impact-Echo: A technique for determining the mechanical properties of rocks. in Daemen & Schultz (eds), 35th U.S. Symposium on Rock Mechanics, USRMS 1995. American Rock Mechanics Association (ARMA), pp. 843-848, 35th U.S. Symposium on Rock Mechanics, USRMS 1995, Reno, United States, 6/5/95.
Momayez M, Sadri A, Hassani EE. Impact-Echo: A technique for determining the mechanical properties of rocks. In Daemen, Schultz, editors, 35th U.S. Symposium on Rock Mechanics, USRMS 1995. American Rock Mechanics Association (ARMA). 1995. p. 843-848
Momayez, Moe ; Sadri, A. ; Hassani, E. E. / Impact-Echo : A technique for determining the mechanical properties of rocks. 35th U.S. Symposium on Rock Mechanics, USRMS 1995. editor / Daemen ; Schultz. American Rock Mechanics Association (ARMA), 1995. pp. 843-848
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