| Project/Area Number |
60550335
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
コンクリート工学・土木材料・施工
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| Research Institution | Tottori University |
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Principal Investigator |
YOSHINO Akira (1986) Tottori University, Research Associate, 工学部, 助手 (40135835)
矢村 潔 (1985) 鳥取大学, 工学部, 助教授
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| Co-Investigator(Kenkyū-buntansha) |
YAMURA Kiyoshi Tottori University, Associate Proffesor, 工学部, 助教授 (30026257)
INOUE Shoichi Tottori University, Associate Proffesor, 工学部, 助教授 (10032286)
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| Project Period (FY) |
1985 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1986: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1985: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | Low quality aggregate / Durability / reinforced concrete / Alkali aggregate reaction / Weathered granite / 耐震特性 / 鉄筋コンクリート |
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| Research Abstract |
Recentry, there is the shortage of high quality aggregate such as river sand, and there are some attempts to utilize some kinds of biproducts to the aggregate of concrete. So the cases that the low quality aggregates are used for concrete will increase.
In this study, experimental investigations on the properties of concrete which containes low quality aggregates such as fine aggregate made from the crushed weathered granite , recycled coarse aggregate prepared by crushing old concrete and reactive aggregate, are performed.
Mechanical properties and durability of concrete contained these aggregate were studied and at the same time, dynamic behaviours of reinforced concrete contained these aggregates were investigated.
Mechanical properties of these concrete were almost the same as these of normal concrete made of high quality aggregate. But as for durability, some kinds of these concrete contained low quality aggregate showed quite low resistance to the repeats of freezing and thawing actions and this can not be improved by air entrainment.Dynamic behaviors of reinforced concrte beams made of low quality aggregate were not inferior to those of normal reinfored concrete beams, and there found the cases that the capacity of shear failure of reinforced concrete beam contained reactive aggregate were improved by the expansion of concrete caused by alkali-aggregate reaction. But to conform these phenomena in the actual circumstance, it is necessary to investigate for more long term test.
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