海水環境下における石灰処理土の性状変化に関する基礎的検討  [in Japanese] STUDY ON THE PROPERTY CHANGES OF LIME-TREATED SOIL UNDER SEA WATER  [in Japanese]

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Abstract

本研究では,海水環境下における石灰処理土の性状の変化を明らかにすることを目的にして,石灰処理した有明粘土および濃度を変化させた人工海水を使用して,溶出試験と浸漬試験を実施した.その結果,石灰処理土と接触する人工海水の濃度が高いときほど,生石灰の主成分であるCaの溶出量が多くなることを明らかにした.また,人工海水に浸漬した石灰処理土は,浸漬水との接触面から深部に向かい,徐々に軟化することを示した.軟化がみられる範囲では石灰処理土中のCa濃度が著しく低下する.

  In order to investigate the influence of seawater on the properties change of lime-treated soil, laboratory experiments were performed. leaching tests, small cone penetration tests and chemical component analyses were conducted by using different concentration of artificial seawater. It was observed that Ca leaching enhanced in the higher concentration of artificial seawater. In the case of cone penetration test, it was found that the cone penetration resistance decreased with increasing concentration of artificial seawater. The depth of decreasing cone penetration resistance was increased with increasing the duration of immersion under artificial sea water. Ca content of lime-treated soil reduces with increasing concentration of seawater. Reduction of Ca content is remarkable at the surface of specimen.

Journal

  • Doboku Gakkai Ronbunshuu C

    Doboku Gakkai Ronbunshuu C 66(1), 21-30, 2010

    Japan Society of Civil Engineers

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