Ground Granulated Blast Furnace Slag Powder

Ggbfs is obtained by quenching molten iron blast furnace slag (a by-product of iron and steel making) in water or stream, to produce a glassy granular product that is then dried and ground into a fine powder. Blast furnace slag powder is widely used in cement and concrete; it can reduce the hydration heat of concrete, increase the later strength, and improve the microstructure of concrete, reinforcement aggregate rate of the bonding interface. It can replace part of the cement in concrete.
Test item
gbt8046 standard
ex-plant test result
physical properties
soundness, boiled expansion (mm)
density, gcm3
≥2.8
2.92
fineness, blaine test, m2kg
≥400
414
activity index, %
7 days
≥75
79
28 days
≥95
110
ratio of fluidity,%
≥95
103
chemical analysis
sulphate(so3), %
≤4.0
0.13
loss on ignition(loi),%
≤3.0
0.2
sum(cao+sio2 ), %
70.41%
aluminum oxide (al2o3) %
14.92%