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Improvement of durability and long-term cyclic fatigue deformation characteristics of cement granulated soils

Research Project

Project/Area Number 16K06488
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

HAYANO Kimitoshi  横浜国立大学, 大学院都市イノベーション研究院, 教授 (40302632)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords土質改良 / リサイクル / 有効利用 / 建設資源 / 地盤工学
Outline of Final Research Achievements

Mud generated by construction work cannot be effectively used as it is because it has fine particles and contains much water. Therefore, in this study granulation is focused as one of the effective utilization technologies. In this research, a water-absorbent material (paper sludge ash improver) was used for mud to efficiently mix the solidified material, and attempts were made to improve the durability of the granulated soil with minimal water addition. Specifically, the water absorbing material was first added to the liquid mud and the properties were instantly improved, and the results showed that the strength could be dramatically improved by adding a cement-based solidifying material several hours to one day later. It became clear that the required strength as an embankment material could be secured by this method, and particle crushing by repeated loading could be suppressed.

Academic Significance and Societal Importance of the Research Achievements

建設工事で発生する泥土の有効利用技術の一つとして造粒による固化技術に着目する場合,改良土の高耐久性化を図るうえで,泥土に吸水性材料を少量添加することが有益であることを示した.特にペーパースラッジ灰系改良材を泥土に添加すると,吸水性能は経時変化しないにも関わらず,養生にともない改良土がゆるやかに硬化するため,泥土のほぐれやすい状態を長時間保っていることが明らかとなり,ペーパースラッジ灰系改良材が吸水性材料として好適であった.製紙工場の廃棄物であるペーパースラッジ灰の有効利用促進にもつながり,異種産業間のゼロエミッションを通して持続的社会の発展に貢献できると考えられる.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (11 results)

All 2019 2018 2017 2016

All Journal Article (3 results) (of which Peer Reviewed: 1 results) Presentation (8 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] FUNDAMENTAL STUDY ON CURING EFFECT AND ITS MECHANISM ON THE STRENGTH CHARACTERISTICS OF PS ASH-BASED IMPROVED SOIL2018

    • Author(s)
      川合彩加, 早野公敏, 山内裕元
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering)

      Volume: 74 Issue: 3 Pages: 306-317

    • DOI

      10.2208/jscejge.74.306

    • NAID

      130007401943

    • ISSN
      2185-6516
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 低温乾燥による PS 灰系改良材混合土の物理特性経時変化の評価2017

    • Author(s)
      川合彩加,山内裕元,早野公敏
    • Journal Title

      第 52 回地盤工学研究発表会講演集

      Volume: 1 Pages: 475-476

    • Related Report
      2017 Research-status Report
  • [Journal Article] 養生効果を考慮したPS灰系改良土の強度予測方法に関する基礎的検討2017

    • Author(s)
      川合彩加,山内裕元,早野公敏
    • Journal Title

      第14回地盤工学会関東支部発表会講演集

      Volume: 1 Pages: 178-181

    • Related Report
      2017 Research-status Report
  • [Presentation] PS 灰系改質材を利用した発生土の盛土材への適用性に関する基礎的検討2019

    • Author(s)
      渡邊悠樹,早野公敏,山内裕元,藤原斉郁
    • Organizer
      第 54 回地盤工学研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] PS灰系改良材の添加が中性化速度に及ぼす影響に関する基礎的検討2019

    • Author(s)
      今井健太朗,早野公敏,山内裕元
    • Organizer
      第74回土木学会年次学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] アルカリ建設汚泥の中性化に関する基礎研究2018

    • Author(s)
      佐伯拓哉,早野公敏,山内裕元
    • Organizer
      第 53 回地盤工学研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 低温乾燥による PS 灰系改良材混合土の物理特性経時変化の評価2017

    • Author(s)
      川合彩加
    • Organizer
      第 52 回地盤工学研究発表会
    • Related Report
      2017 Research-status Report
  • [Presentation] 養生効果を考慮したPS灰系改良土の強度予測方法に関する基礎的検討2017

    • Author(s)
      川合彩加
    • Organizer
      第14回地盤工学会関東支部発表会
    • Related Report
      2017 Research-status Report
  • [Presentation] Recent Issues of Construction Generated Soil Treatment using Waste Paper Sludge Ash2017

    • Author(s)
      Sayaka Kawai
    • Organizer
      NUCE-YNU Seminar on Reuse of Waste Soil from Civil Engineering View
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Granulation Technique in Recycling of Construction Waste Soils and Sludge2017

    • Author(s)
      Kimitoshi Hayano
    • Organizer
      NUCE-YNU Seminar on Reuse of Waste Soil from Civil Engineering View
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] A New Granulation Method with the Process of Crumbling Partially-Cemented Liquid Muds and its Application to a Motocross Track2016

    • Author(s)
      Kimitoshi Hayano, Hiromoto Yamauchi, Naruki Wakuri and Shunsuke Tomiyoshi
    • Organizer
      International Conference on Transportation Geotechnics
    • Place of Presentation
      ポルトガル
    • Year and Date
      2016-09-04
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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