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Title |
Experimental Study to Evaluate the Durability of 100 MPa Class Ultra-high Strength Centrifugal Molding Concrete
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Authors |
김정회(Jeong-Hoi Kim) ; 김성진(Sung-Jin Kim) ; 이두성(Doo-Sung Lee) |
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DOI |
https://doi.org/10.11112/jksmi.2024.28.1.12 |
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Keywords |
내구성; 실험연구; 원심성형; 초고강도 콘크리트; 동결융해시험 Durability; Experimental research; Centrifugal molding; Ultra high strength concrete; Freeze-thaw test |
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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 and a concrete mixing ratio with a high slump (150?200) and a design strength of 100 MPa or more was developed and applied. In order to investigate the durability of centrifugally formed PSC square beams to be used as the superstructure of the avalanch tunnel or ramen bridge, the durability performance of ultra-high-strength centrifugally formed concrete with a compressive strength of 100 MPa was evaluated in terms of deterioration and chemical resistance properties.Concrete durability tests, including chloride penetration resistance, accelerated carbonation, sulfate erosion resistance, freeze-thaw resistance, and scaling resistance, were performed on centrifugally formed square beam test specimens produced in 2022 and 2023. Considering the information verified in this study, the durability of centrifugally molded concrete, which has increased watertightness in the later manufacturing stage, was found to be superior to that of general concrete.
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