Portland Cement P.I 52.5R

Portland Cement P.I 52.5RPer Chinese Standard GB175-1999 SpecificationsGB175-2007 RequirementTypical Ex-Plant Test ResultChemical AnalysisLoss on Ignition (%)≤3.00.68Insoluble Residue (%)≤0.750.50MgO (%)≤5.0 (NB)1.49SO3 (%)≤3.52.55Chloride (%)≤0.060.026Physical PropertiesSoundnessOKOKBlaine permeability (m2/kg)≥300420Initial Setting Time (min)≥4598Final Setting Time (min)≤390165Compressive Strength 3 Days (Mpa)≥27.031.5Compressive Strength 28 Days (Mpa)≥52.563.5Flexural Strength 3 Days (Mpa)≥5.06.8Flexural Strength 28 Days (Mpa)≥7.010.0NB: When MgO is more than 5% but less than 6%, a pressure steam stability test is required. If the sample passes the pressure steam stability test, the product is still qualified.