Cemer GGBS
USE OF GGBS IN CONCRETE AS SUSTAINABLE GREEN BUILDING MATERIAL
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Chemical Composition of GGBS
- round Granulated Blast fumace Slag consist essentially silicates and alumino silicates of calcium. Portland cement is a good catalyst for activation of slag because it contains the three main chemical components that activate slag: lime, calcium sulphate and alkalies.
- The material has glassy structure and is ground to less than 45 microns. The surface area is about 350 to 450 m2 / kg Blaine. The ground slag in presence of water and an activator which are commonly sulphates and/or alkalies which are supplied by Ordinary Portland Cement react chemically with GGBS and hydrates and sets in a manner similar to Portland Cement.
Typical Chemistry Comparisons
| Parameter | GGBS | AS PER IS: 12089-1987 |
| CaO | 37.34% | - |
| Al2O3 | 14.42% | - |
| Fe203 | 1.11% | - |
| Si02 | 37.34% | - |
| Magnesium Oxide (MgO) | 8.71% | Max. 17.0% |
| Manganese Oxide (MnO) | 0.02% | Max. 5.5% |
| Sulphide Sulphur | 0.39% | Max. 2.0% |
| Loss On Ignition | 1.41% | - |
| Insoluble Residue | 1.59% | Max. 5% |
| Glass Content (%) | 92% | Min. 85% |
|
Chemical Mduli CaO+MgO+1/3A/203 SiO2+2/3A/203 |
1.07 | ≥ 1.0 |
| CaO+MgO+A/203 SiO2 | 1.60 | ≥ 1.0 |
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