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Title |
Effect of Ferronickel Slag Powder Content on the Compressive Strength Development of Aerated Filler Concrete
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Authors |
윤현섭(Hyun-Sub Yoon) ; 양근혁(Keun-Hyeok Yang) ; 김도범(Do-Bum Kim) ; 이동섭(Dong-Seop Lee) |
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DOI |
https://doi.org/10.4334/JKCI.2023.35.4.379 |
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Keywords |
페로니켈슬래그; 기포 콘크리트; 유동성 채움재; 데크 파일; 양생온도 ferronickel slag; aerated concrete; high-flow filler; deque pile; curing temperature |
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Abstract |
This study examined the effect of ferronickel slag powder content on the development of compressive strength in high-flow aerated filler concrete, cured at different temperatures of 4 °C, 20 °C, and 35 °C. The study replaced 10 % of ordinary Portland cement with ground granulated blast furnace slag and ferronickel slag powder, ranging from 0 % to 50 % of the unit binder content. The pore size distribution of the aerated concrete was analyzed using mercury intrusion porosimetry. The effect of ferronickel slag powder on the hydration products of cement was traced by X-ray diffraction analysis and thermogravimetric analysis. The test results showed that the compressive strength of aerated concrete decreased as the ferronickel slag powder content increased. This was attributed to the retardation of hydration and an increase in unhydration, despite a slight decrease in total porosity. However, all concrete specimens met the minimum strength requirements for high-flow filler materials applicable for underground excavation, even when using 50 % ferronickel slag powder as a replacement for cement.
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