2010 Fiscal Year Final Research Report
Substantial study on use of Prefoam-type Air-entraining Admixture for Fly Ash Concrete
| Project/Area Number |
20580266
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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 |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | Miyagi University |
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Principal Investigator |
KITATSUJI Masafumi Miyagi University, 食産業学部, 教授 (30195268)
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| Project Period (FY) |
2008 – 2010
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| Keywords | プレフォーム型AE剤 / エントレインドエア / コンクリート / フライアッシュ / 凍結融解抵抗性 |
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| Research Abstract |
Increased use of fly ash is expected from the standpoint of the effective use of natural resources and measures against alkali-silica reaction. However, it is difficult to adequately control the air content of fly ash concrete, as unburnt carbon contained in fly ash adsorbs the air-entraining admixture, posing a risk of reducing the resistance of concrete to frost damage. In this study, a prefoam-type air-entraining admixture of a whipped cream consistency, which is less prone to the effect of unburnt carbon, was used to entrain fine air bubbles into concrete, in an attempt to enhance its resistance to frost damage. The prefoam-type air-entraining admixture was found to be capable of reducing the spacing factor of fly ash concrete and thus effective against freezing and thawing action.
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Research Products
(7 results)
