Blast furnace slag cement(SC) is produced by blending Portland Cement and granulated blast furnace slag. It has remarkable long-term strength and superior concrete crack prevention thanks to low hydration heat. In addition, the product shows excellent watertightness, seawater and acid resistance. By recycling blast furnace slag, which is by-product of steel industry, it contributes to environmental conservation.
Mainly used for mass and marine concrete such as dams, bridges, and harbors, water supply and drainage facilities, tunnels, retaining walls, road pavement
| Classification | Percentage of furnace slag (Mass) |
|---|---|
| Type 1 | Over 5 and Below 30 |
| Type 2 | Over 30 and Below 60 |
| Type 3 | Over 60 and Below 70 |
| Chemical Component | Type 1 | Type 2 | Type 3 |
|---|---|---|---|
| Anhydrous sulfuric acid (SO3) % | Below 3.5 | Below 4.0 | Below 4.5 |
| Magnesium oxide (MgO) % | Below 5.0 | Below 6.0 | Below 6.0 |
| Heat reduction % | Below 3.0 | Below 3.0 | Below 3.0 |
| Classification | Type 1 | Type 2 | Type 3 | ||
|---|---|---|---|---|---|
| Fineness | Specific surface area (Blaine) cm2/g | Over 3000 | Over 3000 | Over 3300 | |
| Soundness | Autoclave Expansion % | Below 0.2 | Below 0.2 | Below 0.2 | |
| Lechatelier mm | Below 10 | Below 10 | Below 10 | ||
| Setting Time | Vicat test | Initial Set (Min.) | Over 45 | Over 60 | Over 60 |
| Termination set (Hour) | Below 7 | Below 10 | Below 10 | ||
| Compressive strength (N/mm2) |
3 Days | Over 12.5 | Over 10.0 | Over 7.5 | |
| 7 Days | Over 22.5 | Over 17.5 | Over 15.0 | ||
| 28 Days | Over 42.5 | Over 42.5 | Over 40.0 | ||
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