LONG TERM UNCONFINED COMPRESSIVE STRENGTH PROPERTIES OF CEMENT-TREATED SOIL

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  • 高圧脱水固化処理装置で作製した浚渫土砂ブロックの長期強度
  • コウアツ ダッスイコカ ショリ ソウチ デ サクセイ シタ シュンセツドシャ ブロック ノ チョウキ キョウド

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<p> Cement-treated soils have been developed in the field geotechnical engineering, and cement-mixing has been widely utilized as a recycling technique.Authors have developed a technique called the cement-mixing and mechanical dehydration method (CMD) as one of recycling techniques for soft clay slurry and investigated the strength properties and the dehydration properties of CMD soil block.This study investigates long-term strength of CMD soil block in terms of the difference of the manufacture season and curing condition. The results obtained from this study are summarized below.</p><p> (1) The water content of CMD soil block decreases about 15 % decrease with increasing curing days irrespective of the season of manufacture season.</p><p> (2) Unconfined compressive strength of CMD soil block produced in summer seasons does not change from 10 MN/m2. Unconfined compressive strength of those produced in winter season increases about 9 MN/m2 with increasing curing days.</p><p> (3) CMD soil block with low water-cement ratio shows high unconfined compressive strength. There is the following relationship. qu=14.566×(W/C)-1.5316 summer season, qu=6.8697×(W/C)-1.0089 for winter season.</p>

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