| Portland cement is the most common type of cement in general use around the world, used as a basic ingredient of concrete, mortar, stucco, and most non-specialty grout. It is commonly used in general concrete construction when there is no exposure to sulphates in the soil or groundwater. OPC usually originates from limestone | ||||
| Major markets of Cement business, which are mainly the African Countries. | ||||
| PORTLAND CEMENT 42.5R (CHINA STANDARD) | ||||
| Items/ Indexes | National Standard | Internal controlled indexes | ||
| Cement MgO (%) | ≤ 5.0 | 3.8 | ||
| Cement SO 3 (%) | ≤ 3.5 | 2.3 | ||
| Cement loss on ignition (%) | ≤ 5.0 | 2.01 | ||
| Cement fineness (%) | ≤ 10.0 | 1 | ||
| Setting time (min) | ≥ 45 | 190 | ||
| Final setting time | ≤ 600 | 245 | ||
| Strength(MPa) | 3-day compressive strength | ≥ 22.0 | 22.3 | |
| 3-day bending strength | ≥ 4.0 | 5.1 | ||
| 28-day bending strength | ≥ 6.5 | 7.2 | ||
| 28-day compressive strength | ≥ 42.5 | 47.5 | ||