GGBFS

General informaton:

Ground Granulated Blast Furnace Slag

SiO2 about 33.42%

CaO about 34.6%

MGO about 7.21%

Al2O3 about 15.23%

SO3 about 0.06%

Moisture about 0.1%

LOI about 0.01%

Ground granulated blast furnace slag powder is a byproduct from iron production in blast furnace. The blast furnace naturally separates from the iron, then collected and cooled with large amount of cold water. This quenching process leads to transformation of liquid into small sized particles having amorphous particles structure. The major use of GGBFS powder applies to ready-mixed concrete. During the production of ready-mixed concrete, GGBFS powder replaces about 50% of normal Portland cement content, generally about 50%, but sometimes up to 70%. The higher the proportion, the better is the durability. The disadvantage of the higher replacement level is that early-age strength development is somewhat slower. GGBFS powder is also used in other forms of concrete, including site-batched and precast.