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Title |
Pore Structures and Mechanical Properties of Early Frost Damaged Concrete Using Electric Arc Furnace Slag as Aggregate
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Authors |
이원준(Won-Jun Lee) ; 최소영(So-Yeong Choi) ; 김일순(Il-Sun Kim) ; 양은익(Eun-Ik Yang) |
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DOI |
https://doi.org/10.11112/jksmi.2020.24.2.68 |
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Keywords |
초기동결; 전기로산화 슬래그; 초기동결 시점; 초기동결 기간; 역학적 특성; 공극구조 Early frost damage; Electric arc furnace slag; Frost initiation time; Frost duration; Mechanical properties; Pore structure |
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Abstract |
The purpose of the paper is to evaluate the pore structure and mechanical properties of early frost damaged concrete using electric arc furnace slag as aggregate. From the results, when the concrete is exposed to frost damage at an early age, the peak point of pores 100 to 150 μm in diameter were transferred into larger one. When the freezing duration is not exceeded 24 hours, it is possible that the pore distribution of under the 200 μm is maintained and pore size of over 500 μm is not formed, and, the freezing resistance of concrete using EFG could be improved. When BFS was mixed in concrete using EFG as coarse aggregate, the relative strength is higher than that of natural coarse aggregate. Meanwhile, the elastic modulus and resonance frequency did not change significantly due to the early frost damage as compared with the compressive strength. So, it is necessary to analyze the correlation between the experimental results in order to evaluate the performance degradation due to early frost damage.
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