The lumps or nodules of clinker are usually of diameter 3-25 mm and dark grey in color.
Clinker cement is one of the most important components of ordinary Portland cement (OPC).
Ordinary Portland cement is made by grinding clinker with several other minerals.
Other types of cement, such as calcareous cement, pozzolanic cement, blast furnace slag cement (BFS), and masonry cement, contain significant amounts of other minerals and a wider range of compositions.
Clinker is made in an energetic chemical process.
Clinker is produced between one and two billion tons per year worldwide.
Due to its extensive construction in developed and developing countries, this material has a very high consumption rate.
There is currently no alternative compound or material in the manufacture of cement-like materials.
| Component | Value |
|---|---|
| SIO2 | >21 |
| AI2O3 | >5.3 |
| Fe2O3 | <3.8 |
| CaO | >=65 |
| MgO | <2.1 |
| SO3 | <=1 |
| K2O | <0.9 |
| Na2O | <0.2 |
| CL | <0.01 |
| L.O.I | <0.5 |
| I.R | <0.5 |
| LSF | >95 |
| SIM | 2.2-2.4 |
| ALM | 1.4-1.6 |
| C3S | >56 |
| C2S | <20 |
| C3A | >=8 |
| C4AF | <11 |
| Free CaO | <1 |
| Total Alkali | <0.80 |
| Size(mm) | Unit(percent) | Actual | Cumulative |
|---|---|---|---|
| Retain on/25mm | % | 10.0 | 10.0 |
| Retain on /10mm | % | 47.0 | 57.0 |
| Retain on/5mm | % | 21.0 | 78.0 |
| Retain on /1mm | % | 19.0 | 97.0 |
| Passing/1mm | % | 10.0 | 100 |
| Component | Value |
|---|---|
| LOI | Max 0.8 |
| SiO2 | 22.1 |
| Al203 | 4.5 |
| Fe203 | 5.1 |
| CaO | 65.1 |
| MgO | Max 2.5 |
| SO3 | 0.4 |
| Na2O | 0.21 |
| K2O | 0.61 |
| Equivalent Alkalies | Max 0.65 |
| IR | 0.3 +- 0.1 |
| F.CaO | 1 +- 0.5 |
| LSF | 92 +- 2 |
| SIM | 2.4 +- 0.2 |
| ALM | 1.2 +-0.2 |
| C3S | Min 58.0 |
| C2S | 20 +- 3 |
| C3A | 3.3 |
| C4AF | 13 +- 2 |
