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Evaluation of properties of engineered and natural barriers focusing on the alteration of bentonite

Research Project

Project/Area Number 19K15489
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 31020:Earth resource engineering, Energy sciences-related
Research InstitutionTottori University

Principal Investigator

KOHNO Masanori  鳥取大学, 工学研究科, 准教授 (60640901)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords放射性廃棄物地層処分 / 人工バリア材 / 天然バリア材 / ベントナイト / 粘土鉱物 / 変質 / 膨潤圧 / 透水係数 / 地層処分 / 化学的変質 / 隙間充填性 / 巨視き裂を含む岩石 / 透水性 / バリア材
Outline of Research at the Start

地層処分において,人工バリア材の変質による膨潤性能や透水性能の低下は,緩衝材の性能を劣化させる負の効果である反面,変質によるベントナイトの粘性の低下等により,天然バリア材中の亀裂を閉塞させてバリア機能を高めるといった正の効果と捉えることもできる.本研究では,人工バリア材(ベントナイト)の性能劣化に及ぼす変質タイプの影響を明らかにするとともに,変質ベントナイトの亀裂閉塞による岩盤の性能向上の関係性を明らかにする.

Outline of Final Research Achievements

In the geological disposal of radioactive waste, the deterioration of swelling performance and permeability due to the alteration of bentonite adversely affects the performance of the cushioning material. However, it can be regarded as a positive effect as it closes the cracks in the bedrock. Depending on the type of alteration occurring on bentonite, the degree of crack blockage in the bedrock and the composition of the blockage minerals may differ. The permeability of the bedrock is expected to differ accordingly. Boundaries between artificial barrier materials (bentonite-based materials), natural barrier materials (crystalline rocks), and both barrier materials are investigated in this study. Some of the effects of altered types and altered minerals (primarily clay minerals) on the physical properties of artificial and natural barrier materials related to geological disposal are clarified herein.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は,地層処分に関わる人工・天然バリア材のより確実な長期安全性の実現に対して,これまで知り得なかった情報を取得でき,さらに,地下環境の状況に応じた適切なバリア材の選定・管理にも貢献できると考える.一方,近年の地震,津波,火山噴火などの地表での被害を考えると,力学的に安定した地下岩盤利用の可能性を広げることは必須である.地下環境下での透水性などの物性の把握により,地下環境の有効利用やエネルギー資源抽出・掘削の際の安定性評価,さらに,遮水壁や地すべり面粘土に関する研究にも展開できると予想される.このように,地盤工学や地殻工学・資源開発分野のみならず幅広い分野において波及効果が期待できる.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (24 results)

All 2022 2021 2020 2019

All Journal Article (6 results) (of which Peer Reviewed: 5 results,  Open Access: 6 results) Presentation (18 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Evaluation of Hydraulic Conductivity of Intact Rocks Using Constant Head Permeability Apparatus2022

    • Author(s)
      河野勝宣,坂田琴美,浅野匡希,野波将宏,小野祐輔,西村 強
    • Journal Title

      Journal of the Society of Materials Science, Japan

      Volume: 71 Issue: 3 Pages: 221-227

    • DOI

      10.2472/jsms.71.221

    • ISSN
      0514-5163, 1880-7488
    • Year and Date
      2022-03-15
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Swelling-Pressure and Hydraulic Conductivity of Compacted Clays Focusing on the Clay-Mineral Type2021

    • Author(s)
      Masanori KOHNO
    • Journal Title

      MATERIALS TRANSACTIONS

      Volume: 62 Issue: 8 Pages: 1203-1209

    • DOI

      10.2320/matertrans.Z-M2021833

    • NAID

      130008067519

    • ISSN
      1345-9678, 1347-5320
    • Year and Date
      2021-08-01
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Importance of Temperature Control in Surrounding Environment during Permeability Test for Measuring Hydraulic Constants of Rock2021

    • Author(s)
      M. Kato, Y. Nara, D. Fukuda, M. Kohno, Toshinori Sato, Tsutomu Sato, M. Takahashi
    • Journal Title

      Journal of the Society of Materials Science, Japan

      Volume: 70 Issue: 4 Pages: 300-306

    • DOI

      10.2472/jsms.70.300

    • NAID

      130008027602

    • ISSN
      0514-5163, 1880-7488
    • Year and Date
      2021-04-15
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Swelling-Pressure and Hydraulic Conductivity of Compacted Clays Focusing on the Clay-Mineral Type2021

    • Author(s)
      河野勝宣
    • Journal Title

      Journal of the Society of Materials Science, Japan

      Volume: 70 Issue: 3 Pages: 272-278

    • DOI

      10.2472/jsms.70.272

    • NAID

      130008000567

    • ISSN
      0514-5163, 1880-7488
    • Year and Date
      2021-03-15
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of hydraulic gradient and clay type on permeability of clay mineral materials2020

    • Author(s)
      Masanori KOHNO
    • Journal Title

      Minerals

      Volume: 10 Issue: 12 Pages: 1064-1064

    • DOI

      10.3390/min10121064

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of the mechanical properties of rock materials based on clay mineral type2020

    • Author(s)
      Masanori KOHNO, Yoshitaka NARA, Masaji KATO, Tsuyoshi NISHIMURA
    • Journal Title

      International Journal of the JSRM

      Volume: 16 Pages: 7-10

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Presentation] Evaluation of permeability of intact rock under confining pressure condition using a constant-head permeability tester2021

    • Author(s)
      Masanori KOHNO, Masaki ASANO, Yusuke ONO, Tsuyoshi NISHIMURA
    • Organizer
      IOP Conference Series: Earth and Environmental Science (Proceedings of the 11th Asian Rock Mechanics Symposium)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 地下深部の圧力環境を表現可能な岩石の定水位型透水試験装置の開発2021

    • Author(s)
      河野勝宣,坂田琴美,浅野匡希,小野祐輔,西村 強
    • Organizer
      令和3年度土木学会全国大会第76回年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 定水位型透水試験装置を用いたインタクトな岩石の透水性評価2021

    • Author(s)
      浅野匡希,河野勝宣,西村 強
    • Organizer
      第56回地盤工学研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 変質ベントナイトが岩石き裂充填性と透水性に及ぼす影響2021

    • Author(s)
      千光士直人,河野勝宣,西村 強
    • Organizer
      第15回岩の力学国内シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] 乾湿繰り返しによる岩質材料の強度低下に及ぼす含有粘土鉱物の影響2021

    • Author(s)
      吉田智彦,河野勝宣,西村 強
    • Organizer
      第15回岩の力学国内シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] 各種粘土鉱物を充填した巨視き裂を含む岩質材料の透水性2021

    • Author(s)
      浅野匡希,河野勝宣,西村 強,奈良禎太,加藤昌治
    • Organizer
      第15回岩の力学国内シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] 地盤・岩盤材料の物性に及ぼす含有粘土鉱物と変質の影響に関する研究2021

    • Author(s)
      河野勝宣
    • Organizer
      第5回岩の力学に関する若手研究者会議
    • Related Report
      2020 Research-status Report
  • [Presentation] 含有する粘土鉱物の種類と構造に着目した岩質材料の力学特性評価2020

    • Author(s)
      河野勝宣
    • Organizer
      日本材料学会第239回岩石力学部門委員会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 粘土鉱物を充填した巨視き裂を含む岩質材料の透水性2020

    • Author(s)
      浅野匡希,河野勝宣,西村 強
    • Organizer
      第55回地盤工学研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] 粘土鉱物の種類に着目した各種粘性土の膨潤圧と透水係数2020

    • Author(s)
      河野勝宣,羽野稜平
    • Organizer
      第55回地盤工学研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] 巨視き裂を含む岩質材料の透水性に及ぼす充填粘土鉱物種の影響2020

    • Author(s)
      浅野匡希,河野勝宣,西村 強
    • Organizer
      第72回(令和2年度)公益社団法人土木学会中国支部研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] Effect of clay mineral type on the physical and mechanical properties of rock materials2019

    • Author(s)
      Masanori KOHNO and Tsuyoshi NISHIMURA
    • Organizer
      ISRM2019 Specialized Conference the 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future (YSRM2019&REIF2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Permeability measurement for macro-fractured granite using water including clay2019

    • Author(s)
      Yoshitaka NARA, Masaji KATO, Tsutomu SATO, Masanori KOHNO and Toshinori SATO
    • Organizer
      ISRM2019 Specialized Conference the 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future (YSRM2019&REIF2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 粘土鉱物を混合した人工軟岩のモードⅠ破壊に関する研究2019

    • Author(s)
      吉田智彦,河野勝宣,西村 強
    • Organizer
      令和元年度土木学会全国大会第74回年次学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 種々の溶液に浸漬させたベントナイト系材料の透水性に関する研究2019

    • Author(s)
      河野勝宣,内田大貴,西村 強
    • Organizer
      第54回地盤工学研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 変質ベントナイトの岩石き裂充填に関する研究2019

    • Author(s)
      千光士直人,河野勝宣,西村 強
    • Organizer
      第54回地盤工学研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 種々の溶液に浸漬させたベントナイトの岩石き裂充填に関する研究2019

    • Author(s)
      千光士直人,河野勝宣,西村 強
    • Organizer
      2019年度(第71回)土木学会中国支部研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 人工軟岩のき裂進展に及ぼす粘土鉱物混合率の影響2019

    • Author(s)
      吉田智彦,河野勝宣,西村 強
    • Organizer
      2019年度(第71回)土木学会中国支部研究発表会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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