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http://dx.doi.org/10.7474/TUS.2012.22.4.284

Determination of Rock Abrasiveness using Cerchar Abrasiveness Test  

Lee, Su-Deuk (Seoul National University)
Jung, Ho-Young (Seoul National University)
Jeon, Seok-Won (Seoul National University)
Publication Information
Tunnel and Underground Space / v.22, no.4, 2012 , pp. 284-295 More about this Journal
Abstract
Abrasiveness of rock plays an important role on the wear of rock cutting tools. In this study, Cerchar abrasiveness tests were carried out to assess the abrasiveness of 19 different Korean rocks. Cerchar abrasiveness test is widely used to assess the abrasiveness of rock because of its simplicity and inexpensive cost. This study examines the relationship between Cerchar Abrasiveness Index (CAI) and mechanical properties (uniaxial compressive strength, Brazilian tensile strength, Young's modulus, Poisson's ratio, porosity, shore hardness of rock), and the effect of quartz content, equivalent quartz content, which was obtained from XRD analysis. As a result of test, CAI was more influenced by petrographical properties than by the bonding strength of the matrix material of rock. CAI prediction model which consisted of UCS and EQC was proposed. CAI decreased linearly with the hardness of the steel pin. Numerical analysis was performed using Autodyn-3D for simulating the Cerchar abrasiveness test. In the simulations, most of pin wear occurred during the initial scratching distance, and CAI increased with the increase of normal loading.
Keywords
Cerchar abrasiveness test; CAI; Abrasiveness; Equivalent quartz content;
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Times Cited By KSCI : 1  (Citation Analysis)
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