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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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The object of this study was based on putting to practical use for the boring mud with bentonite of Korea bentonite(production of Kalpyong-dong, Ochun-myon, Youngil-kun, Kyungsangbuk-province, Korea), For this study some experimental test were carried to fine out the sample of the swelling degree of 22^(㏄) and 18^(㏄) that achieved from, the treatment of alkaline solution of ore sample. Through the study the results obtained are as follows; 1) The increased width of the viscosity was in the highest state at the time of 24 hours. At the time of 24 hours, the 7％ bentonite of addition of CMC 0.1％ was superior to the same sample at the time of 48 hours. 2) 5％ mud was found that sand layer caused the collapse at the same time the mud cake was not formed. 3) It was disclosed that the specific gravity was coincident with 7% mud of API standard.
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