古タイヤを用いたゴムチップ混合固化処理土の靭性およびせん断変形に伴う透水性の変化  [in Japanese] THE DUCTILITY OF CEMENT TREATED CLAY WITH ADDED SCRAPE TIRE CHIPS AND THE CHANGE OF ITS PERMEABILITY UNDER SHEAR DEFORMATION  [in Japanese]

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Abstract

筆者らは,これまでの研究で,古タイヤを破砕したゴムチップを固化処理土に混合した材料の一軸および三軸圧縮試験などを行った結果,圧縮せん断に伴うクラックの発生や成長が抑制され,固化処理土の靭性が改善されることを報告している.本研究では,このゴムチップ混合による固化処置土の靭性改善効果と,固化処理土が本来有する難透水性に着目し,ゴムチップ混合固化処理土の変形に伴う透水性の変化についての実験的検証を行った.その結果,固化処理土単体では,供試体のせん断変形に伴い大きなクラックを生じ,その透水性は大きく変化するのに対し,ゴムチップ混合のケースでは,せん断変形に伴う透水性の変化が非常に小さいという結果が得られた.

From our previous studies, it has reported that the brittle behaviors of cement treated clay was improved to ductility by adding some tire chips in unconfined compressive test and tri-axial compressive test. Because tire chips are elastic material, it has been expected that it was prevented from generating and growing cracks by elastic reaction which generated from tire chips during compressive shearing.<br>In this study, it was investigated and experimented that the relation between deformation and changing in permeability of cement treated clay with added tire chips under deformation. Because it was paid attentions to a low permeability of cement treated clay at no-deformation, and the effect of improving ductility by adding tire chips. From these studies, it was obtained that, during deformation, the permeability of cement treated clay without adding tire chips was changed to high, but also, in the case of adding tire chips, the changing permeability was very small.

Journal

  • Doboku Gakkai Ronbunshuu C

    Doboku Gakkai Ronbunshuu C 64(2), 181-196, 2008

    Japan Society of Civil Engineers

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