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CLASS G - TYPE HSR

CLASS G

CLASS G TYPE HSR

It is an oil well cement, class G HSR (High Sulfate Resistant), in accordance with standard 10A API (American Petroleum Institute). This cement, thanks to its special chemical composition, is the ideal solution for the construction of oil wells, pipelines, water wells and consolidation works of the support bases of offshore platforms. Because of the complexity of the application and extreme conditions of temperature and pressure that it is subjected to, the class G cement is characterized by the constancy of important requirements, such as predictable thickening time, high sulfate resistance, high durability, fluid loss control, low viscosity, the tendency not to segregate and mechanical strength.


Constituants principaux: 

Clinker
Gypse comme régulateur de prise


USES

Oil wells construction
Water wells
Gas wells
Pipelines
Consolidation works of the support bases of offshore platforms

Uses

  • Rigid floorings
  • Soil-cement
  • Structural mortars
  • Pre-stressed and post- tensioned concrete elements
  • Concrete blocks
  • Footings, columns, beams and panels requiring quick-setting and high mechanic resistance concretes

Standard requirements

According to API 10A

Chemical requirements Physical requirements
Loss on ignition ≤ 3,0% Free fluid content ≤ 5,9%
Insoluble residue ≤ 0,75% Compressive strengh Atmospheruc pressure:
Magnesium oxide (MgO) ≤ 6,0% - 8h, 38°C ≥ 2,1 Mpa
Sulfur trioxide (SO3) ≤ 3,0% - 8h, 60°C ≥ 10,3 Mpa
Tricalcium silicate (C3S) ≥ 48% and ≤ 65% Thickening time (schedule N° 5) ≥ 90 and ≥ 120 min
Tricalcium aluminate (C3A) ≤ 3% Max consistency (15 to 30 min) ≤ 30,0 Bc
Tetracalcium aluminoferrite plus twice tricalcium aluminate (C4AF + 2*C3A) ≤ 24%
Total alkali content expressed as sodium oxide (Na2O equivalent) ≤ 0,75%

Colacem in the world

Worldwide Italy Spain Albania Tunisia Dominican Republic
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