The paper examines the effect of ball (drum) grinding and jet milling on the particle size distribution and specific surface area of the powders produced from blast-furnace slag. The effectiveness of jet milling, providing relatively equal powder particles (more than 85% of the fractions is 0–10 μm in size), is shown. Decrease in the average particle size leads to greater specific surface area of the powder and to a sharp increase in activity (strength of the samples prepared with use of blastfurnace slag). Hydraulic activity σ ≥ 30 MPa can be reached by the powder produced from slag with an average particle size to 12 μm and specific surface area S = 0.6–0.8 m2/g, which increases the sample strength. The strength of cemented compositions based on blast-furnace slag can be improved to 40–43 MPa by adding 15–20% Portland cement to the starting mixture.
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Translated from Poroshkovaya Metallurgiya, Vol. 55, Nos. 11–12 (512), pp. 137–144, 2016.
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Kravchenko, V.P., Baglyuk, G.A. & Trotsan, A.I. Effectiveness of Jet Milling for Producing Superfine Powders from Blast-Furnace Slag. Powder Metall Met Ceram 55, 745–750 (2017). https://doi.org/10.1007/s11106-017-9863-y
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DOI: https://doi.org/10.1007/s11106-017-9863-y