Ground Granulated Blast-Furnace Slags--Grinding Methods, Particle Size Distribution, and Properties

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Title: Ground Granulated Blast-Furnace Slags--Grinding Methods, Particle Size Distribution, and Properties

Author(s): B. Osrbaeck

Publication: Special Publication

Volume: 114

Issue:

Appears on pages(s): 1239-1264

Keywords: blast furnace slag; bulk density; fineness; water content; grinding (comminution); particle size distribution; strength; Materials Research

Date: 5/1/1989

Abstract:
Two granulated blast furnace slags were ground to different finenesses in a laboratory ball mill and in a vertical roller mill to produce products that differed in fineness level and shape of particle size distributions. The cementitious properties of the products were evaluated by the ASTM C 989 Slag Activity Index Test and the results correlated with the different fineness parameters. The narrower particle size distribution of the roller-mill products resulted in a slight reduction of the packing capacity of the pure slag powder and a slight increase in mortar water requirement with portland cement. The strength-contribution capacity was found to be highly correlated with the specific surface of the slag, irrespective of the way of grinding. Simultaneous drying during grinding did not influence the cementitious properties.