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Title |
The Development of a 100 Mpa Class Ultra-high Strength Centrifugal Molded Square Beam Design and Manufacturing Technology
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Authors |
이두성(Doo-Sung Lee) ; 김성진(Sung-Jin Kim) ; 김정회(Jeong-Hoi Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2023.27.4.11 |
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Keywords |
원심성형; 초고강도; 각형보; 재하시험; 피암터널 Centrifugal molding; Ultra high strength; Prismatic beam; Standard loading test; Avalanche tunnel |
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Abstract |
In this study, a structural concrete square beam was developed using the centrifugal molding technique. In order to secure the bending stiffness of the cross section, the hollow rate of the cross section was set to 10% or less. Instead of using the current poor mixture of concrete, a special formwork for producing a centrifugal square beam was manufactured, and a concrete mixing ratio with a high slump (150?200) and a design strength of 100 MPa or more was developed and applied. The produced centrifugally formed rectangular beams were subjected to performance tests according to the standard bending and shear test standards for centrifugally formed members. The static load test results for the four specimens exceeded both the nominal bending strength and nominal shear strength, which are design values through structural design, proving the structural reliability of the ultra-high-strength centrifugally formed square beam.
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