Size Dependency of Intact Rocks with High Brittleness: A Potential Solution to Eliminate Secondary Fractures in Brazilian Test

Masoumi, Hossein, Serati, Mehdi, Williams, David J. and Alehossein, Habib (2017). Size Dependency of Intact Rocks with High Brittleness: A Potential Solution to Eliminate Secondary Fractures in Brazilian Test. In: ARMA 2017: 51st U.S. Rock Mechanics/Geomechanics Symposium, San Francisco, USA, (). 25-28 June 2017.

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Name Description MIMEType Size Downloads
Author Masoumi, Hossein
Serati, Mehdi
Williams, David J.
Alehossein, Habib
Title of paper Size Dependency of Intact Rocks with High Brittleness: A Potential Solution to Eliminate Secondary Fractures in Brazilian Test
Conference name ARMA 2017: 51st U.S. Rock Mechanics/Geomechanics Symposium
Conference location San Francisco, USA
Conference dates 25-28 June 2017
Publisher ARMA
Publication Year 2017
Sub-type Fully published paper
Open Access Status Not yet assessed
Total pages 4
Language eng
Abstract/Summary The Brazilian test is one of the most established techniques used for indirect measurement of rock tensile strength. When the test is applied to soft to medium strength rocks, the rupture mechanism is always through the formation of a single diametrical crack initiated at the centre of the disc, where the induced tensile stress is the maximum. However, when applied to disc specimens of harder, stiffer and brittle rocks, secondary shear fractures often interfere adversely with the diametrical (characteristic) tensile crack in the Brazilian test. To prevent such undesirable shear cracking, a series of Brazilian tests on specimens of different sizes was carried out with four different brittle rocks, including granite, basalt and two types of monzonite. From the results, it is concluded that the problem associated with the undesirable shear failure developed in the vicinity of the contact points can be effectively eliminated through a change in the size of the disc in the Brazilian test.
Keyword Brazilian indirect tensile strength
High speed camera
Shear failure
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Civil Engineering Publications
Not Yet Publicly Available
 
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Created: Wed, 28 Jun 2017, 13:36:46 EST by Mehdi Serati on behalf of School of Civil Engineering