2021 Fiscal Year Final Research Report
Development of ceramics using recycled aggregate by spark plasma sintering
| Project/Area Number |
19K05100
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 26050:Material processing and microstructure control-related
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| Research Institution | University of the Ryukyus |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 廃コンクリート / リサイクル / セラミックス / 放電プラズマ焼結法 / 機械的性質 |
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| Outline of Final Research Achievements |
This study investigated the fabrication of ceramics using recycled aggregate powder from milled Okinawan waste concrete, which is a new recycling method for waste concrete. To fabricate high-strength ceramics, we employed a spark plasma sintering method. Three types of ceramics were prepared using 1) recycled fine aggregate powder, 2) recycled coarse aggregate powder, and 3) recycled fine aggregate powder and fly ash. The flexural strength of the three ceramics was higher than 35 MPa, which met the requirements of ISO 13006 standards. In addition, it was determined that fly ash plays a major role as reinforcement particles in ceramics that use recycled fine aggregate powder.
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| Free Research Field |
粉末成形
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では，廃コンクリートを砕いた再生骨材は粉末化することで，セラミックス原料としてリサイクル可能であることを示した．この結果は，循環型社会の構築や最終処分場の延命に資するため，社会的意義は高いといえる．また，再生骨材の粉末をセラミックス原料として利用した環境調和型材料の成形加工例を示したことは，材料加工学分野における学術的意義があると考えられる．
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