We are buying the following product:GREY ORDINARY PORTLAND CEMENT CONSTRUCTION GRADE 42.5 ACCORDING TO: BRITISH STANDARDS BS 12/1997Euro Standard EN 197-1/2000 AMERICAN ASTM C-150SABS approvedSPECIFICATIONS: CHEMICAL COMPOSITION:Silicon Dioxide(SiO2): 20.8 21.5Aluminium Oxide(Al2O3): 5.30Ferric Oxide(Fe2O3): 3.25 3.5Calcium Oxide(CaO): 65.60Magnesium Oxide(MgO%): 1.7 3.0Sulphur Trioxide(SO3): 2.7 3.0Loss Of Ignition(LOI): 1.8 3.0Insoluble Residue(%): 0.1 0.7Tricalcium Silicate(C3S%): 50.0 54.4Dicalcium Silicate(C2S%): 14.2 18.2Tricalcium Aluminate(C3A%): 6.0 6.8Tricalcium Alumino Ferrice(C4AF%): 11.6Chromium(Cr%): 2.0 Max.PHYSICAL AND MECHANICAL PROPERTIES:Blain(CM2/GR): 3.250Autoclave Expantion: 0.02Normal Consistency(%): 27.5Initial Setting Time(Hours:Mins): 3.25 4.50Hard Set(Hours:Mins): 4.54 6.00Fitnes Index(CM2/GM): 2800 3040COMPRESSIVE STRENGTH ISO/EN 197-1/2000 BS 4550 MORTAR:@ 03 DAYS 2.65 34.2 KG/CM2@ 07 DAYS 37.3 42.5 KG/CM2@ 28 DAYS 52.8 54.6 KG/CM2We are alway in need of OPC,and looking for long term business only with real and direct suppliers,brokers and intermediates please dont waste your time and our,only with seriuos buyers.please quote us full detals about the product origin minimum qauntity terms and conditions of payment and delivery certificates if available.At the moment we are in urgent need of 25000 MT CIF UAE.Awaiting your quotation.