cement 42.5 N/R
. GREY PORTLAND CEMENT FOR CONSTRUCTION GRADE 42.5 N/R
GREY PORTLAND CEMENT CONSTRUCTION GRADE 42.5 ACCORDING TO UNITED
STATES STANDARDS ASTM C 150, AS FOLLOWS:
Silicon Dioxide (SiO2) 20.8–21.5 |
Blain CM2/GR 3.250 |
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Aluminium Oxide (Al2O3) 5.30 |
Autoclave Expansion 0.02 |
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Ferric Oxide (Fe2O3) 3.25–3.5 |
Normal Consistency % 27.5 |
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Calcium Oxide (CaO) 65.60 |
Initial Setting Time (Hours:Mins) 3.25 – 4.50 |
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Magnesium Oxide (MgO%) 1.7–3.0 |
Hard Set (Hours:Mins) 4.54 – 6.00 |
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Sulphur
Trioxide (SO3) 2.7–3.0 |
Fitness Index (CM2/GM) 2800-3040 |
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CHEMICAL COMPOSITION |
PHYSICAL AND MECHANICAL PROPERTIES |
Loss Of Ignition (LOI) 1.8–3.0 |
COMPRESSION STRENGTH |
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Insoluble Residue % 0.1–0.7 |
@ 03 DAYS 2.65 – 34.2 KG/CM2 |
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Tricalcium Silicate (C3S%) 50.0–54.4 |
@ 07 DAYS 37.3 – 42.5 KG/CM2 |
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Dicalcium Silicate (C2S%) 14.2–18.2 |
@ 28 DAYS 52.8 – 54.6 KG/CM2 |
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Tricalcium Aluminate (C3A%) 6.0–6.8 |
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Tricalcium Alumino Ferrice (C4AF%) 11.6 |
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Chromium (Cr%) 2.0Max |
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SPECIFICATION FOR PORTLAND CEMENT TYPE 42.5
N BRITSH
STANDART- BS EN 197 – 1:2000 or BS 12/1996/ASTM C-150
items
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CEM I 42,5N BS EN 197 – 1:2000 BS 1219/96 / ASTM C-150 |
Chemical Properties:
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Loss Of Ignition (L.O.I)
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Maximum 3.0% Maximum 3.0% |
Magnesium Oxide (MGO)
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Maximum 4% Maximum 4% |
Sulphur
Trioxide (SO3)
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Maximum 3.0% Maximum 3.0% |
SILICON DIOXIDE(SIO2)
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Minimum 20 % Minimum 20 % |
ALUMINIUM OXIDE (AL2O3)
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Maximum 6% Maximum 6% |
FERRIC OXIDE (FE2O3):
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Maximum 6% Maximum 6% |
TRiCALCIUM ALUMINATES (C3Al)
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Maximum 8% Maximum 8,05% |
tricalcium silicate (C3S)
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Maximum 50% Maximum 60% |
Alkalies K2O& Na2O
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Maximum 0.6% |
Insoluble residues
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Maximum 0.75% |
Physical Properties: |
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Soundness Autoclave expansion
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Maximum 0.8% Maximum 0.8% |
Surface area cm2/gm (Blaine Method)
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Not less than 2800 Not less than 2800 |
initial Setting Time (Vicat)
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Minimum 45 min |
Final Set Time (Vicat)
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Maximum 375 min |
Compression Resistance N/
Sugar Icumsa 45
SPECIFICATIONS:
Commodity |
White cane Sugar Icumsa 45 |
Polarity at 20 Deg. Centigrade |
99.80Min. |
ASH Content |
0.04 % max |
Moisture |
0.04 % Max |
Solubility |
100.0 % DTR and free flowing |
Granulation |
Fine |
Icumsa |
Max 45 ICUMSA, attenuation Index Units method no:4 –1978 |
Sediments |
None |
Color |
Sparking White |
Crop |
2004/2006 |
Magnetic particles |
mg/k4 |
SO |
mg/kg 20 |
Radiation |
Normal
w/o presence of cesium or iodine: certified |
Smell |
Free of any smell |
Reducing Sugar |
0.05 % Max |
Substance |
Solid, crystal max |
Max AS |
1. p.p.m |
Max OS |
2 p.p.m. MAX CU: 3 p.p.m. |
Max CU |
3 p.p.m. |
HPN STAPH AUREUS |
NIL |
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