2022 Fiscal Year Final Research Report
Development of construction materials that eliminates the burning process to contribute to building a decarbonized society
| Project/Area Number |
20K21014
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 22:Civil engineering and related fields
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2020-07-30 – 2023-03-31
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| Keywords | アルカリ活性材料 / 収縮低減 / 副産物利用 |
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| Outline of Final Research Achievements |
In this study, the fresh properties, compressive strength and shrinkage stability of alkali activate material with cement clinker (CL) fine aggregate (CG hardened product) was investigated. The results showed that the Liquidity and material separation resistance of the fresh properties could be controlled by adjusting the particle size distribution of the CL fine aggregate and the fine aggregate-binder ratio. The compressive strength of the CG hardened product was higher than that of the reference mortar after 28 days of age, although the compressive strength of the CG hardened product was lower than that of the reference mortar used for the strength test in the early stage of age. In addition, the CG hardened product was also affected by shrinkage, but it was shown that the addition of gypsum and limestone powder to CG hardened product reduced the shrinkage of it.
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| Free Research Field |
コンクリート工学
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| Academic Significance and Societal Importance of the Research Achievements |
従来のアルカリ活性材料は寸法安定性に問題があり，さらには可使時間が短く実用化するためには解決する必要がある課題を有していた．本研究で開発した材料はアルカリ活性材料と同様に高炉スラグ微粉末を主結合材として使用しているにもかかわらず，一般的なモルタルと同程度の可使時間を有しており，さらにはアルカリ溶液を使用しないという点において安全に使用することができるものである．さらには，混合材としてgypsumと石灰石微粉末を使用することで寸法安定性を向上させることができたことから，アルカリ活性材料の実用化の一助となると考えている．
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