Coal slag is a recycled by-product generated from coal combustion at thermal power plants and industrial boiler facilities — including textile, protein, paper, and drying industries.
Coal slag includes two types:
- Raw coal slag: used in construction works.
- Fine coal slag: used effectively as an additive in cement production, as well as in concrete mixing or brick production.
SELECTED QUALITY SPECIFICATIONS OF S95 GROUND GRANULATED BLAST FURNACE SLAG (GGBFS):
|
QUALITY PARAMETER
|
S95 PRODUCT
|
| HÒA PHÁT |
TCVN 11586:2016 |
|
|
2,8 |
>= 2,8 |
2. Specific surface area, cm²/g
|
4500 |
>= 4000 |
3. Strength activity index, %
7 days
28 days
|
83
96
|
>= 75
>= 95
|
|
|
92 |
>= 90 |
|
|
0,8 |
<= 1,0 |
6. Magnesium oxide (MgO) content, %
|
8,0 |
<= 10,0 |
7. Sulfur trioxide (SO₃) content, %
|
1,0 |
<= 4,0 |
8. Chloride ion (Cl⁻) content, %
|
0,001 |
<= 0.02 |
9. Loss on ignition (LOI), %
|
1,0 |
<= 3,0 |
