• Geotechnical Engineering
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• v.24 no.4
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• pp.59-68
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• 2008

• Proceedings of the Mineralogical Society of Korea Conference
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• 2005.05a
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• pp.117-121
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• 2005

• Economic and Environmental Geology
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• v.20 no.3
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• pp.210-210
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• 1987

• Proceedings of the Mineralogical Society of Korea Conference
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• 2004.05a
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• pp.1-4
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• 2004

• Proceedings of the Mineralogical Society of Korea Conference
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• 2004.05a
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• pp.7-9
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• 2004

• Proceedings of the Petrological Society of Korea Conference
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• 2009.05a
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• pp.78-79
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• 2009

• Journal of the Korean Geosynthetics Society
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• v.14 no.4
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• pp.159-165
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• 2015

In this study, the coefficient of permeability for cement mixtures including the powdered sludge of basalt, sand or fly ash with different mixed ratios was measured in order to reuse the powdered sludge of basalt in Jeju Island as the cut off materials. As the permeability test results, the coefficient of permeability for the cement mixtures with fly ash was increased with increasing the fly ash contents. The amount of fly ash in the cement mixtures should be mixed with less than 8 %. Meanwhile, the coefficient of permeability for the cement mixtures with sand was increased with increasing the sand contents. The amount of sand in the cement mixtures should be mixed with less than 40 %. According to the comparison result of cement mixtures including fly ash or sand, it is more advantageous to put the sand into the cement mixtures, rather than mixing the fly ash.

• Journal of the Korea Institute of Building Construction
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• v.16 no.6
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• pp.545-551
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• 2016

Membrane structures which can be used large spatial structure are being expanded because of various advantages. However, despite the diverse membrane structure buildings and materials, the standard for membrane material performance that considering fire safety is still inadequate. Therefore, this study applied basalt or glass woven fabric with flame resistance on architectural membrane, and report the fire safety for architectural membrane using the strength properties, flammability and incombustibility. From the test result, the architectural membrane using basalt or glass woven fabric showed a low heat release rate and total heat release. Therefore, it was confirmed that the fire safety is relatively high.

• Economic and Environmental Geology
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• v.29 no.3
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• pp.281-291
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• 1996

Samples of Badwater greenstones from the Crystal Falls terrane in northeastern Wisconsin have been analyzed for major, trace and rare earth elements. Geochemical characteristics of the rocks provide clues to the petrologic character and paleotectonic environment of basaltic magma generation. They have chemical composition typical of continental tholeiites. The low Mg values and abundances of Ni and Cr indicate that the lavas were extensively fractionated prior to extrusion. The variations of incompatible elements suggest that the rocks were affected by interaction with crustal rocks. The samples least affected by contamination have trace element compositions similar to those of T-type mid-ocean ridge basalts. The parent was modified by crustal contamination process and this process shifted the rock compositions to that of continental tholeiites as the rock evolved. Interpretations of the chemical characteristics of the rocks, based on modem analogs, favor their emplacement in an extensional tectonic regime.

• The Journal of the Petrological Society of Korea
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• v.10 no.1
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• pp.13-26
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• 2001

Songaksan volcano, which occurs as a monogenetic volcano on the southwestern promontory of Hallasan shield volcano, is composed of tuff ring, cinder cone, lava pond and cinder conelet complex on wide basalt plateau. Except for an influx of external quartz xenocrysts in the tuff ring. Totally the volcano ranges from trachyandesite to trachybasalt in petrography and chemical compositions, which confirm the continuum between the evolved and primitive compositions widely occurring in the Jeju volcanic system. Chemical data for the volcano show quantitative compositional variation from the lower to the upper part of the volcanic sequences. The continuous compositional variations generally define a compositionally zoned magma storage. The chemical data suggest that the compositiona1 donations might have resulted from the fractional crystallization of a parental alkali magma. As result, the Songaksan volcano initially tapped the lop of the zoned magma storage and subsequently erupted successively more primitive magma.