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http://dx.doi.org/10.12652/Ksce.2014.34.4.1215

Mechanical Characteristics of Basalt in Jeju Island with Relation to Porosity  

Moon, Kyoungtae (Jeju National University)
Park, Sangyeol (Jeju National University)
Kim, Youngchan (Hanyang General Construction Co., Ltd.)
Yang, Soonbo (Hanyang General Construction Co., Ltd.)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.34, no.4, 2014 , pp. 1215-1225 More about this Journal
Abstract
Volcanic rocks formed from magma near the earth surface commonly show vesicular structures due to exsolution of gaseous phases in magma. The distinction and the amount of vesicles are greatly various, but there are few researches on the effect of volume percentage of vesicles on the mechanical properties. In this study, mechanical characteristics of volcanic rocks in relation to the porosity are investigated through experimental tests with Jeju basalt. Two methods (the buoyancy method and the caliper method) are adopted for measuring porosity. And unconfined compressive strength, elastic modulus, tensile strength, and elastic wave velocity are plotted against porosity in order to propose the empirical relations after the regression analysis. Also, unconfined compressive strength and the elastic modulus in relation to the elastic wave velocity are proposed with the analysis. In the case of vesicular rocks with more than 5% porosity, it is found that the buoyancy method provides more accurate estimation of porosity than the caliper method. The unconfined compressive strength, the elastic modulus, and the elastic wave velocity decrease curvilinearly with increasing in porosity. Also, the unconfined compressive strength and the elastic modulus increase linearly with increasing in elastic wave velocity.
Keywords
Basalt; Porosity; Unconfined compressive strength; Elastic modulus; Elastic wave velocity;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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