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| Moderate heat portland cement 42.5 | ||||||||||||
| Index of control quality | ||||||||||||
| Item Test | GB | YF | ||||||||||
| Fineness | (m2/kg) | ≥250 | ≥250 | |||||||||
| Setting Time(min) | Initial | ≥60 | ≥60 | |||||||||
| Final | ≤720 | ≤400 | ||||||||||
| Soundness | pass | pass | ||||||||||
| MgO% | ≤5.0 | ≤5.0 | ||||||||||
| SO3% | ≤3.5 | ≤3.2 | ||||||||||
| LOSS% | ≤3.0 | ≤3.0 | ||||||||||
| Na2Oequ% | / | ≤0.6 | ||||||||||
| C3A% | ≤6.0 | ≤5.0 | ||||||||||
| C3S% | ≤55 | ≤55 | ||||||||||
| f-CaO% | ≤1.0 | ≤1.0 | ||||||||||
| kj/kg heat of hydration | 3 Days | ≤251 | ≤243 | |||||||||
| 7Days | ≤293 | ≤285 | ||||||||||
| Bending Strength(MPa) | 3 Days | ≥3.0 | ≥4.0 | |||||||||
| 7Days | ≥4.5 | ≥5.0 | ||||||||||
| 28Days | ≥6.5 | ≥7.5 | ||||||||||
| Compression Strength(MPa) | 3Days | ≥12.0 | ≥13.0 | |||||||||
| 7Days | ≥22.0 | ≥23.0 | ||||||||||
| 28Days | ≥42.5 | ≥43.5 | ||||||||||
| Performance: The hydration heat is low, the air shrinkage is small, the corrosion resistance ability is strong, anti- frozen, the rate of strength development is stable. | ||||||||||||
| Applicable scope: The cement is widely suitable for the request hydration heat low dam and the mass concrete project. Also may replace the Portland cement to apply in the industry and the civil construction. | ||||||||||||
42.5R Cement