| Method of Manufacture (GGBFS) |
 After the molten slag
has been quenched rapidly by passing it through a trough of high
pressure, high volume water sprays the heat energy contained in the
molten slag causing it to explode and instantly form Granulated Blast
Furnace Slag or GBFS.
This solidified slag product GBFS is then further processed or
ground using conventional cement clinker grinding technology to form
Ground Granulated Blast Furnace Slag or GGBF.
On a casual examination GGBFS has an "off white" appearance in
colour and would pass for
fine powed with a typical fineness of between 380m2/kg and
420m2/kg.
When finely ground to form Ground Granulated Blast Furnace Slag or
GGBFS, its applications widen to include
uses in activation of granular pavement materials and as a cementitious
material in the manufacture of concrete, particularly where resistance to aggressive
ground, water and aggressive environmental conditions are present.
Typical uses for GGBFS are:
- As a general cementitious replacement (25 – 65%) for Ordinary Portland Cement in concrete manufacture.
- Activator for stabilizing granular pavement materials as the only stabilizing agent or in conjunction with small quantities of lime.
- As a significant cementitious replacement (min 65%) for Ordinary Portland Cement where long term durability in aggressive ground, water or air environments is required.
- As a high cementitious replacement (>80%) in special grout mixes
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