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Sustainable recycling technology for rejuvenating aged bitumen by hydrothermal decomposition

Research Project

Project/Area Number 19H02219
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 22010:Civil engineering material, execution and construction management-related
Research InstitutionNihon University

Principal Investigator

KANOU Yousuke  日本大学, 生産工学部, 教授 (50451315)

Co-Investigator(Kenkyū-buntansha) 新田 弘之  国立研究開発法人土木研究所, 土木研究所(つくば中央研究所), 研究グループ長 (00355869)
秋葉 正一  日本大学, 生産工学部, 教授 (10267031)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥15,730,000 (Direct Cost: ¥12,100,000、Indirect Cost: ¥3,630,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Keywords舗装材料 / リサイクル / アスファルト / 亜臨界水 / 水熱分解 / 持続的利用 / アスファルト混合物 / 舗装発生材 / 高温高圧水 / 舗装用素材 / 持続可能 / 性状回復
Outline of Research at the Start

本研究は,老化したアスファルトの性状を水(水熱分解)によって回復し,“舗装用資材の持続的な再資源化技術の開発”を目的とする.また、本研究計画では「老化したアスファルトの性状を水熱分解により若返らせ,持続的利用を実現できるか?」を核心的問いとし,問1 老化したアスファルトの性状回復に適した反応条件は?,問2 老化と回復を繰り返したアスファルトの性状は?を具体的問いとして,それを段階的に解明する.

Outline of Final Research Achievements

Through this research, we have worked on developing an asphalt rejuvenation technology using water (high-temperature, high-pressure water). As a result, we have found that when subcritical water near the critical point is used as a solvent, the asphalt becomes lighter as the reaction temperature and reaction time increase, and that reaction conditions of 350°C and 15 minutes are appropriate for reusing asphalt as a paving material. Furthermore, we have confirmed that asphalt that has been repeatedly recycled and has aged and deteriorated can be rejuvenated to a quality comparable to that of new asphalt by hydrothermal decomposition under the same conditions.

Academic Significance and Societal Importance of the Research Achievements

本技術は、道路舗装の維持修繕工事に伴い年間約2,000万トン発生する再生資材の持続的利用ならびに高品質化を目指したものであり、「水と油」の関係性に着目した新たなアプローチによる研究要素を含む。よって、本研究の成果は、水熱分解における反応条件が重質油の化学的・物理的性状に及ぼす影響を明らかにするとともに、高温高圧水を応用した新たなマテリアルリサイクルの可能性、社会インフラの維持・更新に伴う資源の持続的利用、環境負荷低減の可能性を広げる一助となることを期待する。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (9 results)

All 2023 2022 2021 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (4 results) (of which Invited: 1 results) Book (2 results)

  • [Journal Article] ADAPTABILITY OF HYDROTHERMAL DECOMPOSITION METHOD FWOR REPEATED RECYCLING OF RECLAIMED ASPHALT PAVEMENT2023

    • Author(s)
      赤津憲吾,加納孝志,八木正輝,加納陽輔,秋葉正一
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering)

      Volume: 78 Issue: 2 Pages: I_18-I_24

    • DOI

      10.2208/jscejpe.78.2_I_18

    • ISSN
      2185-6559
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Technical Approaches to the Recycling of Reclaimed Asphalt Pavement into Aggregate and Binder2022

    • Author(s)
      Kengo Akatsu, Yousuke Kanou, and Shouichi Akiba
    • Journal Title

      Construction Materials

      Volume: -

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Recovering Effect of Hydrothermal Decomposition on Aged Bitumen2020

    • Author(s)
      赤津 憲吾, 加納 陽輔, 秋葉 正一
    • Journal Title

      Journal of the Japan Petroleum Institute

      Volume: 63 Issue: 2 Pages: 79-88

    • DOI

      10.1627/jpi.63.79

    • NAID

      130007804570

    • ISSN
      1346-8804, 1349-273X
    • Year and Date
      2020-03-01
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] アスファルトの繰返し再生に対する水熱分解法の適応性2022

    • Author(s)
      赤津憲吾,加納孝志,八木正輝,加納陽輔,秋葉正一
    • Organizer
      土木学会舗装工学講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] スファルト舗装用素材の永続リサイクルに向けた取り組み2021

    • Author(s)
      加納陽輔
    • Organizer
      第34回日本道路会議
    • Related Report
      2021 Annual Research Report
  • [Presentation] アスファルト混合物の持続可能な分別再資源化技術の確立に向けて2021

    • Author(s)
      赤津憲吾、加納陽輔、秋葉正一
    • Organizer
      石油学会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 酸素濃度がアスファルトの劣化に及ぼす影響について2020

    • Author(s)
      楊 晨輝,加納陽輔,赤津憲吾,新田弘之,川島陽子
    • Organizer
      土木学会全国大会第75回年次学術講演会
    • Related Report
      2020 Annual Research Report
  • [Book] 道路建設2021

    • Author(s)
      加納陽輔
    • Total Pages
      6
    • Publisher
      日本道路建設業協会
    • Related Report
      2021 Annual Research Report
  • [Book] PETROTECH2021

    • Author(s)
      赤津憲吾、加納陽輔、秋葉正一
    • Total Pages
      1
    • Publisher
      石油学会
    • Related Report
      2021 Annual Research Report

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Published: 2019-04-18   Modified: 2025-01-30  

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