GREY PORTLAND CEMENT 42,5 R/N AND 52,5 / 32,5 (AS EQUAL AMOUNT) R/N BRITISH STANDAR 12/1996, AMRICAN ASTM C 150 OR EUROPEAN UNE 197 1/2000. DEATAILS OF PRODUCTS CHEMICAL COMPOSITION, PHYSICAL AND MECHANICAL PROPERTIES AND COMPRESSIVE STRENGTH IS AS FOLLOWS:
CHEMICAL COMPOSITION (+/-5%)
- Silicon Dioxide (sio2) 20.8 – 21.5
- Aluminum Oxide (Al2O3) 5.30
- Ferric Oxide (Fe2O3) 3.30
- Calcium Oxide (cao) 65.60
- Magnesium Oxide (mgo%) 1.7 – 3.0
- Sulphur Trioxide (SO3) 2.7 – 3.0
- Loss Of Ignition (LOI) 1.8 – 3.0
- Insoluble Residue % 0.1 – 0.7
- Tricalcium Silicate (C3S%) 50.0 – 54.4
- Dicalcium Silicate (C2S%) 14.2 – 18.2
- Tricalcium Aluminate (C3A%) 6.0 – 6.8
- Tricalcium Alumino Ferrice (C4AF%) 11.6
- Chromium (Cr%) 2.0 Max.
PHYSICAL AND MECHANICAL PROPERTIES (+/-5%)
- Blain CM2/GR 3.250
- Autoclave Expansion 0.02
- Normal Consistency % 27.5
- Initial Setting Time (Hours:Mins) 3.25 – 4.50
- Hard Set (Hours:Mins) 4.54 – 6.00
- Fitness Index (CM2/GM) 2800-3040
COMPRESSIVE STRENGTH (+/-5%)
- @ 02 DAYS MINIMUM 12OKG/CM2 MAXIMUM 230 KG/CM2
- @ 28 DAYS MINIMUM 420 KG/CM2 MAXIMUM 640 KG/CM2
QUALITY: BSS12/1996, ASTM C150 0R UNE 197 1/2000-06 OR SUCH SPECIFICATIONS THAT MAY BE REQUIRED.