LONG TERM STRENGTH CHARACTERISTIC OF CEMENT-TREATED AND HIGH-PRESSURE-DEHYDRATED SOIL BLOCK

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  • UENO Kazutaka
    九州大学大学院 工学府 建設システム工学専攻
  • KASAMA Kiyonobu
    東京工業大学 環境・社会理工学院 土木・環境工学系
  • NAKAGAWA Yasuyuki
    九州大学大学院 工学研究院 海域港湾環境防災共同研究部門
  • SEGA Yasuhiro
    国土交通省 九州地方整備局 北九州港湾・空港整備事務所
  • MINAMI Masaharu
    国土交通省 九州地方整備局 北九州港湾・空港整備事務所
  • SUETSUGU Koji
    国土交通省 九州地方整備局 北九州港湾・空港整備事務所
  • KASUGAI Yasuo
    一般財団法人沿岸技術研究センター
  • KATAGIRI Masaaki
    株式会社日建設計シビル

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Other Title
  • 浚渫土砂を用いて作製した大型高強度固化処理ブロックの長期強度特性
  • シュンセツドシャ オ モチイテ サクセイ シタ オオガタ コウキョウドコカ ショリ ブロック ノ チョウキ キョウド トクセイ

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<p> Authors have developed a technique called the cement-treated and mechanical dehydration method (CMD) as one of recycling techniques for dredged soil. Cement-treated soils have been developed in the field geotechnical engineering, and cement-mixing has been widely utilized as a recycling technique. The CMD technique is able to manufacture high-strength soil block. This paper examines the long-term strength of the CMD soil block, which are set different preparing, and curing conditions such as summer/winter season and underwater/air environment. The results obtained from this study are summarized below.</p><p> (1)The water content of CMD soil block decreases about 10 % in 2 years with increasing curing periods.</p><p> (2)Unconfined compressive strength of CMD soil block cured in underwater increases to about 10MPa in 2 years.</p><p> (3) CMD soil block with low water-cement ratio shows high unconfined compressive strength. The block cured in underwater, and manufactured in winter season have the following relationship. qu=14.608×(W/C)-1.592.</p>

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