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Ordinary Portland CementP.O.42.5R
Items | åÂ??Â??ä½Â?? | GB175-2007 åÂ??½å®¶æ Â??åÂ??Â?? | Control Parameter åÂ??Â??æÂ??§æ Â??åÂ??Â?? | ||
MgO (Max, %) | % | ≤5.0 | ≤4.5 | ||
SO3 (Max, %) | % | ≤3.5 | ≤3.0 | ||
LOI (Max, %) | % | ≤5.0 | ≤4.5 | ||
Fineness (Max, %) | % | ≤10.0 | ≤2.0 | ||
The content ofalkali (åÂ??«ç¢±éÂ??Â??) | % |
| ≤0.75 | ||
Time of Setting (åÂ??Â??ç»Â??æÂ??¶éÂ??´) | Initial set (min, not lessthan) åÂ??Â??åÂ??Â?? | min | ≥45 | ≥120 | |
Final set (min, not lessthan) ç»Â??åÂ??Â?? | min | ≤600 | ≤270 | ||
Soundness å®Â??å®Â??æÂ??§ | Pat test è¯Â??饼æ³Â?? |
| Passed | Passed | |
Le Chatclier éÂ??·æ°Â??夹æ³Â?? | mm | ≤5.0 | ≤4.0 | ||
Bending strength æÂ??Â??æÂ??Â??强度 | 3天 | MPa | ≥4.0 | ≥4.0 | |
28天 | ≥6.5 | ≥7.0 | |||
CompressiveStrength æÂ??Â??åÂ??Â??强度 | 3天 | MPa | ≥22.0 | ≥22.0 | |
28天 | ≥42.5 | ≥47.0 | |||
