| Project/Area Number |
14350305
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Building structures/materials
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| Research Institution | Kyushu University |
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Principal Investigator |
MATSUFUJI Yasunori Kyushu University, Faculty of Human-Environment Studies, Professor, 大学院・人間環境学研究院, 教授 (20037922)
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| Co-Investigator(Kenkyū-buntansha) |
KOYAMADA Hidehiro Kyushu University, Faculty of Human-Environment Studies, Research Associate, 大学院・人間環境学研究院, 助手 (80233625)
YAMAGUCHI Kentaro Kyushu University, Faculty of Human-Environment Studies, Assistant Professor, 大学院・人間環境学研究院, 講師 (10274490)
KOYAMA Tomoyuki Kyushu University, Faculty of Human-Environment Studies, Associate Professor, 大学院・人間環境学研究院, 助教授 (50215430)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥13,900,000 (Direct Cost: ¥13,900,000)
Fiscal Year 2003: ¥5,600,000 (Direct Cost: ¥5,600,000)
Fiscal Year 2002: ¥8,300,000 (Direct Cost: ¥8,300,000)
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| Keywords | High-Compactable Concrete / Medium Fluidity Concrete / Thickness of Stuck Mortar / Thickness of Excess Mortar / Thickness of Water / Interstitial Ratio / Segregation / Optimum Sand Percentage |
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| Research Abstract |
In this study, mix design method for High-Compactable Concrete was discussed on the assumption that the coarse aggregates in concrete move with stuck mortar on their surface. The conclusions of the experiments and the discussions were summarized as follows.
1.The thickness of stuck mortar was estimated by the size of coarse aggregate and the amount of high-range water-reducing and air-entraining admixture.
2.Concerning the thickness of stuck mortar and water content that is converted by the amount of high-range water-reducing and air-entraining admixture, the fluidity of High-Compactable Concrete could be estimated by the theory of Thickness of Excess Mortar.
3. As the fluidity of concrete, the fluidity and the segregation of mortar could be estimated by the thickness of water covering the surface of particles such as cement, fly ash and fine aggregate. And, it was found that adding coal ash into mortar was very effective to improve fluidity and to reduce segregation.
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