| Project/Area Number |
06304020
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| Research Category |
Grant-in-Aid for Co-operative Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | OSAKA PREFECTURE UNIVERSITY |
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Principal Investigator |
KUWABARA Takao OSAKA PREFECTURE UNIVERSITY,FACULTY OF AGRICULTURE,PROFESSOR, 農学部, 教授 (70081528)
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| Co-Investigator(Kenkyū-buntansha) |
KUNITAKE Masato MIYAZAKI UNIVERSITY FACULTY OF AGRICULTURE,PROFESSOR, 農学部, 教授 (10039323)
NONAKA Tsuguhiro SHIMANE UNIVERSITY,FACULTY OF AGRICULTURE,PROFESSOR, 農学部, 教授 (60093655)
HATTORI Kunio TOTTORI UNIVERSITY,FACULTY OF AGRICULTURE,ASSISTANT PROFESSOR, 農学部, 助教授 (00032300)
ASAI Kiyoharu MIE UNIVERSITY,FACULTY OF BIORESOURCES,PROFESSOR, 生物資源学部, 教授 (10035975)
HUJII Kouichi UNIVERSITY OF IWATE,FACULTY OF AGRICULTURE,ASSISTANT PROFESSOR, 農学部, 助教授 (00032574)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥22,300,000 (Direct Cost: ¥22,300,000)
Fiscal Year 1995: ¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 1994: ¥14,300,000 (Direct Cost: ¥14,300,000)
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| Keywords | Concrete / Flozen and Melting / Acid proof / Weakning / Admixture / Alkali-aggregate Reaction / Injury from salt / Errosion / 鉄筋腐蝕 / 腐蝕モデル / 混和材 |
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| Research Abstract |
This research is concerned with the investigation of weakened concrete materials which are in japan and with the qualitry impluvement methods of these materials. There are many facters in the problem of weakened phenomena for concrete materials, which are generally said as samely as Alkali-Silika reaction to gravels, flozen and melting of concrete, salt deseases for concrete and so on. Research results sre as following as :
(1) Rice husk ash which is pulverized by burning is effective for the restraint of Alkali-Silika reaction and water bleeding in fresh concrete and making concrete strengthened at long ages. (from Aai, tukioka, Kuwabara, Isiguro)
(2) Flozen and melting of condrete is affected by the permiability of concrete and so the permiability of concrete is the important index for flozen and melting phenomenon. (from Huji)
(3) Chemical indexes for evaluation of the depth in weakened area are proposal, (from Nonaka) these are pH in a section, contents of S03, the strength of X-ray.
(4) Utility of admixture (SF) is effective for acid proof and quality impluvement of concrete. (from Hattori, Morii) And so on.
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