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Title |
Mechanical Properties of Amorphous Steel Fiber Reinforced High Strength Concrete Exposed to High Temperature
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Authors |
최경철(Gyeong-Cheol Choe) ; 김규용(Gyu-Yong Kim) ; 김홍섭(Hong-Seop Kim) ; 황의철(Eui-Chul Hwang) ; 남정수(Jeong-Soo Nam) |
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DOI |
https://doi.org/10.4334/JKCI.2020.32.1.019 |
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Keywords |
고강도 콘크리트; 비정질 강섬유; 압축강도; 탄성계수; 열팽창변형 high strength concrete; amorphous steel fiber; compressive strength; elastic modulus; thermal expansion strain |
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Abstract |
In this paper, stress-strain, compressive strength, elastic modulus and thermal expansion strain of amorphous steel fiber reinforced high strength concrete exposed to high temperatures of 100, 200, 300, 500 and 700 °C were investigated. The concrete used compressive strength 100 and 120 MPa high strength concrete, 0.0, 0.3 and 0.5 vol% amorphous steel fiber were mixed. As a result, the specimens containing amorphous steel fibers showed small peak strain and thermal expansion strain, and compressive strength and modulus of elasticity were measured relatively higher than 300 °C. Therefore, the cracks of concrete caused by the expansion of the aggregate and the shrinkage of the cement paste are controlled by the thermal expansion strain and the maximum strain due to the incorporation of the amorphous steel fiber, so that the strength and stiffness degradation phenomenon of the high-strength concrete could be improved.
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