| Project/Area Number |
17560408
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Civil engineering materials/Construction/Construction management
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| Research Institution | The University of Tokushima |
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Principal Investigator |
MIZUGUCHI Hiroyuki The University of Tokushima, Institute of Technology and Science, Professor (00035651)
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| Co-Investigator(Kenkyū-buntansha) |
HASHIMOTO Chikanori The University of Tokushima, Institute of Technology and Science, Professor (10180829)
UEDA Takao The University of Tokushima, Institute of Technology and Science, Associate Professor (20284309)
WATANABE Takeshi The University of Tokushima, Institute of Technology and Science, Assistant Professor (50332812)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2005: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Keywords | Construction Materials / Concrete / Recycling / Recyclic resources / High grade concrete |
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| Research Abstract |
It is investigated that the mechanical properties, the length change and the resistance to freezing and thawing of the self-compacting concrete using whole recycled aggregate and powder from a part of wall of a concrete structure which was build in 1950's in Tokyo.
The recycled materials used were divided into three sizes such as coarse aggregate, fine aggregate large and fine aggregate small. The properties of recycled coarse aggregate are satisfied the standard on recycled coarse aggregate of class H of JIS. The properties of fine aggregate large and fine aggregate small are nearly satisfied the class M of the draft JIS, respectively. A recycling equipment was used an eccentric rotor.
The 10 mixes were selected having 65±55cm in slump flow using the same proportion of three recycled aggregates from the demolished concrete structure.
As the results, it is obtained the self-compacting concretes using whole recycled aggregates. The compressive strength and Young's modulus of recycled concretes are satisfied the required value at the ages of 28 days in JASS 5, respectively. The length change of the recycled concretes with an expansive additive are satisfied the required value at the ages of 28 days in JASS 5. The resistance to freezing and thawing of recycled self-compacting concretes are not satisfied the required level.
It is considered that the recycled self-compacting concretes using whole recycled materials are applicable to normal concrete structure in consideration for using method such as area, part of structure etc.
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