Specification
| S. No. | Characteristics |
As Per 33 Grade (NS: 49:2053) |
As Per 43 Grade (IS: 8112:1989) |
As Per 53 Grade (IS: 12269:1987) |
Maruti Cement Grade OPC |
|---|---|---|---|---|---|
| A | Chemical Analysis | ||||
| 1. | LSF (Lime Saturation Factor) | Not greater than 1.02 Not less than 0.66 | Not greater than 1.02 Not less than 0.66 | Not greater than 1.02 Not less than 0.66 | 0.92 |
| 2. | AM (Alumina Modulus) | Not less than 0.66 | Not less than 0.66 | Not less than 0.66 | 1.37 |
| 3. | Insoluble Residue (% Mass) | Not more than 2% | Not more than 2% | Not more than 2% | 1.69 |
| 4. | Magnesia (% Mass) | Maximum 5% | Maximum 5% | Maximum 5% | 2.25 |
| 5. | Sulphuric Anhydride (SO3) | Maximum 3% | Maximum 3% | Maximum 3% | 2.01 |
| 6. | Total Loss on Ignition % | Maximum 4% | Maximum 4% | Maximum 4% | 1.7 |
| B | Physical Requirement | ||||
| 1. | Specific surface (CM2/g) | Minimum 2250CM2/g | Minimum 2250CM2/g | Minimum 2250CM2/g | 3000 CM2/g |
| 2. | Setting time (minutes) | ||||
| a. Initial setting time | Not less than 30minutes | Not less than 30minutes | Not less than 30minutes | 90 | |
| b. Final setting time | Not More than 600 min. | Not More than 600 min. | Not More than 600 min. | 215 | |
| 3. | Soundness | ||||
| a. By le-chataller (MM) | Not more than 10MM | Not more than 10MM | Not more than 10MM | 1 | |
| b. By Auto clave (%) | Not more than 0.8% | Not more than 0.8% | Not more than 0.8% | 0.04 | |
| 4. | Compressive Strength (Kg/Cm2) | ||||
| a. 072+-1hour le; 3 days | Minimum 160Kg/Cm2 | Minimum 160Kg/Cm2 | Minimum 160Kg/Cm2 | 280Kg/Cm2 | |
| b. 168+-1hours le; 7 days | Minimum 220Kg/Cm2 | Minimum 330Kg/Cm2 | Minimum 370Kg/Cm2 | 390Kg/Cm2 | |
| c. 672+-4hours le; 28days | Minimum 330Kg/Cm2 | Minimum 430Kg/Cm2 | Minimum 530Kg/Cm2 | 550Kg/Cm2 |
