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PORTLAND CEMENT CEMI 42.5R

PORTLAND CEMENT CEMI 42.5R

BS EN 197-1 CEM I 42.5R

Cement is a hydraulic binder, i.e. a finely ground inorganic material which, when mixed with water, forms a past which sets and hardens by means of hydration reactions processes and which, after hardening, retains its strength and stability even under water. Cement when appropriately batched and mixed with aggregate and water, be capable of producing concrete or mortar which retains its workability for a sufficient time and shall after defined periods attain specified strength levels and also possess long-term volume stability. Cement is the basic and the most widely used building material. Twice as much Cement/Concrete is used worldwide than all other Building Materials.

Application:

  • General purpose construction works
  • In buildings requiring high early strength,
  • Concrete poured in cold weather
  • Prefabricated buildings
  • Tunnel-mould applications
  • Construction chemicals production
  • Foundation applications
  • Bridges, highways and airstrips
  • Tunnels and underground railroads
  • Water storages
  • And many others

PROTLAND CEMENT – CEM I 42.5R

Constituent Typical % Limit values
Silicon Oxide, % SiO2 19,37
Aluminium Oxide, % Al2O3 4,68
Iron Oxide, % Fe2O3 3,35
Calcium Oxide, % CaO 63,08
Magnesium Oxide, % MgO 1,42
Sulphur Oxide, % SO3 2,71 ≤ 4,0%
Sodium Oxide, % Na2O 0,29
Potassium Oxide, % K2O 0,63
CI 0,0089 ≤ 0,10%
Loss on Ignition ,% ( L.O.I) 3,28 ≤ 5,0%
Insoluble Residue, % (I.R) 0,33 ≤ 5,0%
Free lime 0,73
Physical analysis Results Limit values
Initial Setting Time (minutes) 155 ≥ 60
Final Setting Time (minutes) 250
Soundness/Expansion (mm) 1,0 ≤ 10
Specific Surface Area Blaine (cm2/g) 3275
2 days – Compressive Strength (MPa) 24,0 ≥ 20
7 days – Compressive Strength (MPa) 39,2
28 days – Compressive Strength (MPa) 52,6 ≥ 42,5 ; ≤ 62,5