42.5R Цемент

Moderate heat portland cement 42.5Index of control qualityItem TestGBYFFineness(m2/kg)≥250≥250Setting Time(min)Initial≥60≥60Final≤720≤400SoundnesspasspassMgO%≤5.0≤5.0SO3%≤3.5≤3.2LOSS%≤3.0≤3.0Na2Oequ%/≤0.6C3A%≤6.0≤5.0C3S%≤55≤55f-CaO%≤1.0≤1.0kj/kg heat of hydration3 Days≤251≤2437Days≤293≤285Bending Strength(MPa)3 Days≥3.0≥4.07Days≥4.5≥5.028Days≥6.5≥7.5Compression Strength(MPa)3Days≥12.0≥13.07Days≥22.0≥23.028Days≥42.5≥43.5Performance: 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.