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Title |
Mechanical Properties of Concrete Containing Magnetic Fine Aggregate under Magnetic Field
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Authors |
최종권(Jongkwon Choi) ; 김이중(Ijung Kim) ; 김민재(Minjae Kim) ; 정상후(Sanghoo Jung) ; 최완규(Wankyu Choi) |
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DOI |
https://doi.org/10.4334/JKCI.2022.34.4.407 |
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Keywords |
자성물질; 급냉 제강슬래그; 유도가열; 압축강도; 탄성계수 magnetic material; rapid-cooled steel slag; induction heating; compressive strength; elastic modulus |
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Abstract |
This paper presents an experimental research to investigate the feasibility of applying induction heating to concrete containing a magnetic fine aggregate. Rapid-cooled steel slag was used as the magnetic material which substituted a portion of fine aggregate contents in the concrete. Volume-replacement rates of 0 % and 40 % were selected and denoted as PS00 and PS40. To evaluate the influence of the induction heating on concrete mechanical properties, compressive strength and elastic modulus were measured. The effects of specimen size and substitution of fine aggregate on the mechanical properties were also investigated to rationalize the evaluation. Induction heating had little influence on the mechanical properties of PS00. Compared to PS00, PS40 without induction heating had approximately 40.0~56.7 % increase in compressive strength and elastic modulus due to the substitution effect. However, after induction heating, the compressive strength of PS40 at 28 days was reduced by 15.3 % and the elastic modulus of PS40 showed reduction in the range of 11.9~21.0 % for all ages (7, 14, 28 days).
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