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2013 Fiscal Year Final Research Report

Study on the process of strength development and degradation in chemical ground improvement by lime and cement

Research Project

  • PDF
Project/Area Number 23560592
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geotechnical engineering
Research InstitutionSaga University

Principal Investigator

NEGAMI Takehito  佐賀大学, 工学(系)研究科(研究院), 助教 (30325592)

Project Period (FY) 2011 – 2013
Keywords化学的地盤改良 / 沖積粘土 / ポゾラン反応
Research Abstract

In this study, the effects of soil environment on the improved strength was investigated when the chemical improvement was applied for soft grounds. To prepare a specimen of the unconfined compression test, were immersed distilled water, brine, dilute sulfuric acid. After curing period predetermined, were performed dissolution tests and unconfined tests. From the results of tests, it was found that the strength reduction due to dissolution hardly occurs by changes of surrounding grounds in the high blending ratio of hardening materials. At low blending ratio of hardening materials, decrease in strength is greater than the high blending ratio of hardening material. And, that if the salt water is most pronounced revealed.

  • Research Products

    (9 results)

All 2014 2013 2012

All Presentation (9 results)

  • [Presentation] 深層混合処理工法の適用における軟弱地盤の微視的土構造2014

    • Author(s)
      根上武仁・日野剛徳・加瑞・姫野季之
    • Organizer
      第49回地盤工学研究発表会
    • Place of Presentation
      北九州
    • Year and Date
      20140700
  • [Presentation] 地盤環境の変化の視点に基づく改良柱体および周辺地盤の一軸圧縮特性に関する検討2014

    • Author(s)
      姫野季之・日野剛徳・根上武仁・加瑞
    • Organizer
      第49回地盤工学研究発表会
    • Place of Presentation
      北九州
    • Year and Date
      20140700
  • [Presentation] セメント系改良柱体の打設前後における地盤の微視的土構造と間隙径分布2014

    • Author(s)
      嘉村俊・根上武仁・日野剛徳・加瑞・姫野季之
    • Organizer
      平成25年度土木学会西部支部研究発表会講演概要集
    • Place of Presentation
      福岡大学
    • Year and Date
      20140300
  • [Presentation] セメント系改良柱体の打設前後における自然地盤と改良柱体近傍地盤のpHと一軸圧縮特性2014

    • Author(s)
      鍋内利輝・日野剛徳・加瑞・根上武仁・姫野季之
    • Organizer
      平成25年度土木学会西部支部研究発表会講演概要集
    • Place of Presentation
      福岡大学
    • Year and Date
      20140300
  • [Presentation] Influences of calcium carbonate, sodium silicate and salt on clay structure2013

    • Author(s)
      Usman, F., Hino, T., Jia, R. and Negami, T
    • Organizer
      Proceedings of the 5th Young Geotechnical Engineers'Conference -5th iYGEC 2013 (Qui et al. Edited)
    • Place of Presentation
      Pari
    • Year and Date
      20130800
  • [Presentation] 佐賀平野に堆積する粘性土の物理化学的性質と微視的土構造2013

    • Author(s)
      相賀康介,根上武仁,日野剛徳,柴錦春
    • Organizer
      平成23年度土木学会西部支部研究発表会
    • Place of Presentation
      (CD-ROM)
    • Year and Date
      20130000
  • [Presentation] 粘性土の初期強度発現過程と微視的土構造におけるシリカ・カルシウムの役割に関する基礎的研究2013

    • Author(s)
      海崎大輝,Usman Fakhriyah,日野剛徳,加瑞,根上武仁
    • Organizer
      平成23年度土木学会西部支部研究発表会
    • Place of Presentation
      (CD-ROM)
    • Year and Date
      20130000
  • [Presentation] 生石灰改良による有明粘土・蓮池粘土の地盤内環境を考慮した強度変化2012

    • Author(s)
      松田朋浩,根上武仁,末吉聖次,日野剛徳
    • Organizer
      平成23年度土木学会西部支部研究発表会
    • Place of Presentation
      (CD-ROM)
    • Year and Date
      20120000
  • [Presentation] カオリン改良土に及ぼす溶存シリカ量の影響と初期強度発現過程における強度の変化2012

    • Author(s)
      浪瀬智史,末吉聖次,日野剛徳,加瑞,Tri Harinto,根上武仁
    • Organizer
      平成23年度土木学会西部支部研究発表会
    • Place of Presentation
      (CD-ROM)
    • Year and Date
      20120000

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Published: 2015-07-16  

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