ADVANCEMENT OF EXPERIMENTATION FOR MEASURING HYDRAULIC CONDUCTIVITY OF BENTONITE USING HIGH-PRESSURE CONSOLIDATION TEST APPARATUS

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  • 高圧圧密試験装置を用いたベントナイトの透水係数算出における試験方法の高度化

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In the geological disposal facility of high-level radioactive wastes, it is important to grasp the hydraulic conductivity characteristic of bentonite. The purpose of this study is the advancement of the examination method for the measurement of a more reliable hydraulic conductivity using high-pressure consolidation test apparatus (maximum consolidation pressure 10MPa). Consequently, it succeeded in improving the reliability of data by raising the resolution of displacement used for an examination, increasing to 80 the number of measurement data for 20 minutes after making each consolidation pressure act on the occasion of measurement and adopting the data of a high consolidation pressure (more than 5.88MPa) stage.

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