We are AMT Comunicacion based in Barcelona , Spain. We are member of Tradekey.com since July, 2008. Our business is related to Construction & Real Estate industry and we specifically deal in cement. Please find our product details below: Cement GREY PORTLAND CEMENT CONSTRUCTION GRADE 42.5 N/R CHEMICAL COMPOSITION ⢠Silicon Dioxide (SiO2) 20.8 â21.5 ⢠Aluminum Oxide (Al2O3) 5.30 ⢠Ferric Oxide (Fe2O3) 3.25 â 3.5 ⢠Calcium Oxide (CaO) 65.60 ⢠Magnesium Oxide (MgO%) 1.7 â 3.0 ⢠Sulphur Trioxide (SO3) 2.7 â 3.0 ⢠Loss Of Ignition (LOI) 1.8 â 3.0 ⢠Insoluble Residue % 0.1 â 0.7 ⢠Tricalcium Silicate (C3S%) 50.0 â 54.4 ⢠Dicalcium Silicate (C2S%) 14.2 â 18.2 ⢠Tricalcium Aluminate (C3A%) 6.0 â 6.8 ⢠Tricalcium Alumino Ferrice (C4AF%) 11.6 ⢠Chromium (Cr%) 2.0 Max. PHYSICAL AND MECHANICAL PROPERTIES ⢠Blain CM2/GR 3.250 ⢠Autoclave Expantion 0.02 ⢠Normal Consistency % 27.5 ⢠Initial Setting Time (Hours:Mins) 3.25 â 4.50 ⢠Hard Set (Hours:Mins) 4.54 â 6.00 ⢠Fitnes Index (CM2/GM) 2800-3040/ Thank you for taking the time to go through our business profile. If there are any question, inquiry or comments, please feel free to contact us.