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http://dx.doi.org/10.7843/kgs.2020.36.2.17

Cohesion and Internal Friction Angle Estimated from Brazilian Tensile Strength and Unconfined Compressive Strength of Volcanic Rocks in Jeju Island  

Moon, Kyoungtae (Dept. of Civil Eng., Jeju National Univ.)
Yang, Soon-Bo (Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology)
Publication Information
Journal of the Korean Geotechnical Society / v.36, no.2, 2020 , pp. 17-28 More about this Journal
Abstract
With respect to the tensile strength of volcanic rocks in Jeju Island, a comparative study was conducted using the existing research results and the test results performed in this study. In addition, the characteristics and effectiveness of the cohesion and internal friction angle estimated from the Brazilian tensile strength and unconfined compressive strength of Jeju volcanic rocks were investigated. As results, the Brazilian tensile strength of Jeju volcanic rocks was closely related to absorption, and decreased exponentially as the absorption increased. It was confirmed that the internal friction angle was closely related to the ratio of unconfined compressive strength to Brazilian tensile strength (σc / σt), and increased logarithmically as the ratio of σc / σt increased. In addition, the ratios of σc / σt of Jeju volcanic rocks were in the range of 5~20 depending on the magnitude of internal friction angle. In the case of cohesion, it was closely related to the absorption and Brazilian tensile strength. The cohesion exponentially decreased as the absorption increased, such as the relation between the Brazilian tensile strength and absorption. It was confirmed that there was a linear relation between the cohesion and Brazilian tensile strength.
Keywords
Absorption; Brazilian tensile strength; Bulk specific gravity; Cohesion; Internal friction angle; Jeju Island; Unconfined compressive strength; Volcanic rocks;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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