Grey Portland cement clinker conforming to Vietnam standards TCVN 7024: 2002, suitable for producing Ordinary Portland Cement conforming to ASTM C 150 Type 1 NoItemsUnitSpecification 1. Compressive strength(Mpa) * After 3 daysN/nm2> 25 * After 28 daysN/nm2> 50 2. Particle size * 50 3. Moisture%< 1 4. CaO%58-67 5. SiO2%18-26 6. Al2O3%3-8 7. Fe2O3%2-5 8. MgO%< 5 9. Free Lime%< 1.5 10. Insoluble residue%< 0.75 11. Loss on ignition (LOI)%< 1 12. Color Grey, dark grey. In bulk.
