CEM IV/A (V) 42,5 R – SR

Sulphate resistant Pozzolanic cement, consist of clinker with C3A ≤ 9 % and fly ash. Concrete with a low heat of hydration. Recommended for moderate to high strength concrete, (classes C30/37 to C35/45) exposed to aggressive environments, specifically for those containing chlorides and/or sulphates. Suitable for mass concrete.

65% ≤ Clinker ≤ 79%;
21% ≤ Siliceous fly ash ≤ 35%;
Additional minor constituents ≤ 5%;
Calcium sulfate as setting regulator.

• Chemical
  • Sulfate content (SO₃) ≤ 3,5%;
  • Chloride content (Cl^-) ≤ 0,10%;
  • Clinker C₃A ≤ 9%;
  • Pozzolanicity: Satisfies the test at 8 days.
• Physical
  • Initial setting time (min) ≥ 60;
  • Soundness (mm) ≤ 10.
• Mechanical
  • Compressive strength
  • Minimum values
  • 2 days: 20,0 MPa;
  • 28 days: 42,5 MPa.

• Reinforced concrete:
  • Particularly indicated for classes in the range of C20/25 to C35/45;
  • Works with very long comissioning;
• Road pavements:
  • Road foundations;
  • Bound granular base layers;
  • Concrete surface layers.
• Mass concrete;
• Concrete in aggressive environments;
• Seawater works;

Minimum growth curve

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• Moderate heat of hydration with slow development;
• Gradual progression of strength even after 28 days;
• Good performance in aggressive environments, even when exposed to sulfates;
• High compactness and resistance to water penetration at late ages.

• Attend the standard minimum cement content and maximum water/cement ratio;
• Provide adequate protection and cure according to corresponding standards;
• Keep framework and scaolding in place until required strength is obtained;
• When in aggressive environments, strictly follow standard recommendations and technical guidance on the subject.

• Concrete requiring fast strength development;
• Pre-stressed concrete;
• Concreting under low temperatures;

• Wear proper protective clothing, gloves and eye/face protection equipment;
• The production of this cement represents a decrease of CO₂ emissions;
• For further information, check the Safety Data Sheet, available at www.cimpor.com