Surface Stabilization of Kanto Loam

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  • 関東ロームの表面処理について
  • カントウ ローム ノ ヒョウメン ショリ ニ ツイテ

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In connection with the stabilization of soil with the use of sodium chloride, the author made a study on the surface stabilization of Kanto loam (volcanic ash) by adding it the solution of acid. Soil samples taken from the Kanto loam were consolidated after they were added sodium chloride and the solution of hydrochloric acid, nitric acid or sulfuric acid. The samples thus stabilized were examined in the points of the unconfined compressive strength, the degree of defacement, and the slaking and infiltration character. The effects of acid solution on the samples were as follows:<BR>1. The unconfined compressive strength was over twice greater than that of the sample containing sodium chloride only.<BR>2. The degree of defacement decreased to less than onethird of that of the sample containing sodium chloride only. The durability against the slaking increased by 20 to 30 times.<BR>3. The rate of infiltration decreased to a half to onethird of that of the sample with sodium chloride only.<BR>4. In general, it was found most effective to add 1.8% hydrochloric acid or 3.7% nitric acid to the sample containing 0.5%-1.5% sodium chloride.

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