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Sulphate Resisting Portland Cement (SRPC) Concrete Protection Against Sulphate Attack

Concrete made with Sulphate Resisting Cement is less vulnerable to sulphate attacks because its C3A is lower than 5% - thereby reducing the formation of Ettringite (expansive hydrates). Sulphate Resisting Cement is manufactured from a synthesis of different specific standard raw materials of high purity under strict supervision of an expert technical team.

ADVANTAGES

»    Complete assurance against Sulphate Attack.
»    Enhanced life and durability of Structure under aggressive conditions.
»    Progressive high compressive strength.
»    Corrosion resistance of steel by preventing sulphate and chloride attack.

IDEAL APPLICATIONS

»    Ports, Harbors, Docks
»    Dams exposed to saline and polluted water
»    Construction activity in saline land
»    Construction exposed to sea water, e.g. sea walls, break water, tetrapods
»    Construction of sewage and drainage system
»    Effluent treatment plants
»    Chimney, cooling towers
»    Chemicals industries, water storage, underground foundations, etc.

SPECIFICATIONS OF SRC CEMENT AGAINST IS REQUIREMENT

Sr.No.

Description

Unit

Req. as per IS-12330 1988

SDCC Norms

A) CHEMICAL COMPOSITION
1. Insoluble Residues(IR) % 4.5 Max 1.50 Max.
2. Magnesium Oxide(MgO) % 6.0 Max 2.00 Max.
3. Sulphuric Anhydride(SO3) % 2.5 Max 2.50 Max.
4. Loss on Ignition(LOI) % 5.0 Max 3.0 Max.
5. Lime Saturation Factor (LSF) % 0.66-1.02 0.90-0.95Min.
6. Alumina Iron ratio (A/F) % - -
7. Tricalcium Silicate (C3S) % - -
8. Tricalcium Aluminate (C3A) % % 5.0 Max. 4.5 Max.
9. C4AF+C3A % 25.0 Max 24.5 Max.
B) PHYSICAL PROPERTIES
1. Specific Surface m2/kg 225 Min. 280 Min.
2. Soundness (Expansion)  
  a) By Le-Chatelier mm 10.0 Max. 3.0 Max.
b) By Autoclave % 0.8 Max. 0.2 Max
3. Setting Time  
  a) Initial Set Minute 30 Min. 45 Min.
b) Final Set Minute 600 Max. 275Max.
4. Compressive Strength  
  a) 3 days MPa 10 Min. 30Min.
b) 7 days MPa 16 Min. 38 Min.
c) 28 days MPa 33 Min. 52 Min.