Grey portland cement
US $40.00
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| Clinker 1-525 (M500) | ||
| Component | ISIRI 389 standard | test result |
| SiO2 | - | 22.50 % |
| Al2O3 | - | 5.50 % |
| Fe2O3 | - | 3.46 % |
| CaO | - | 65.46 % |
| MgO | <5 | 1.10 % |
| SO3 | <3.5 | 0.31 % |
| Insoluble Residue | <0.70 | 0.25 % |
| Loss On Ignation | <3.00 | 0.30 % |
| K2O | - | 0.60 % |
| Na2O | - | 0.35 % |
| Free CaO | - | 1.20 % |
| Liter Weight | - | 1250 g/lit |
| Lime Saturation Factor (LSF) | - | 91.25 % |
| Silica Modulus (SM) | - | 2.51 % |
| Alumina Modulus (AM) | - | 1.59 % |
| C3S | - | 53.55 % |
| C2S | - | 24.11 % |
| C3A | - | 8.72 % |
| C4AF | - | 10.53 % |
| Clinker 1-425 (M400) | ||
| Component | ISIRI 389 standard | test result |
| SiO2 | - | 23.10 % |
| Al2O3 | - | 5.30 % |
| Fe2O3 | - | 3.42 % |
| CaO | - | 65.55 % |
| MgO | <5 | 1.05 % |
| SO3 | <3.5 | 0.25 % |
| Insoluble Residue | <0.70 | 0.14 % |
| Loss On Ignation | <3.00 | 0.25 % |
| K2O | - | 0.65 % |
| Na2O | - | 0.30 % |
| Free CaO | - | 1.00 % |
| Liter Weight | - | 1250 g/lit |
| Lime Saturation Factor (LSF) | - | 89.60 % |
| Silica Modulus (SM) | - | 2.51 % |
| Alumina Modulus (AM) | - | 1.55 % |
| C3S | - | 50.75 % |
| C2S | - | 27.94 % |
| C3A | - | 8.26 % |
| C4AF | - | 10.41 % |




Rejection - C3S MIN 58.5%, CAO MIN 64.5%, FREE CAO MAX 1.35%, TOTAL ALKALI MAX 0.75%.
Compressive Strength, Mpa 3 days of CPC 50 Min: 28N/mm2
Moisture of Clinker, ( %) Max 1%
cement clinker - overview. Portland cement clinker is a dark grey nodular material made by heating ground limestone and clay at a temperature of about 1400 °C - 1500 °C. The nodules are ground up to a fine powder to produce cement, with a small amount of gypsum added to control the setting properties.
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