2011 Fiscal Year Final Research Report
Improvement of relaxation of frost hydraulic pressure and mechanical properties of concrete by water-repellent high strength ceramics
| Project/Area Number |
21360259
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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 | Muroran Institute of Technology |
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Principal Investigator |
HAMA Yukio 室蘭工業大学, 大学院・工学研究科, 教授 (70238054)
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| Co-Investigator(Kenkyū-buntansha) |
ATARASHI Daiki 東京工業大学, 大学院・理工学研究科, 助教 (70431393)
KISHIMOTO Yoshihiko 室蘭工業大学, 大学院・工学研究科, 助教 (30435987)
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| Project Period (FY) |
2009 – 2011
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| Keywords | コンクリート / 凍結水圧 / 力学性状 / 耐凍害性 |
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| Research Abstract |
The aim of this study was to develop the new technology which can reduce the decrease of strength by entrapped air in AE concrete and contribute the improvement of frost resistance of concrete. The concept of this technology is that the high strength and water-repellent ceramic porous powder which have similar pore structure to concrete would be able to relieve the hydraulic pressure during freezing. Because the vacant capillary pore of powder would play a role of air void entrained by AE agent. It was clarified that the porous powder can improve the frost resistance of concrete ; however, it cannot reduce the decrease of strength because it has air entraining property due to water-repellency on the surface. Therefore, it is necessary to develop the high strength porous powder which is hydrophobic in the pore and hydrophilic on the surface in order to improve the problem.
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