Specification

S. No. Characteristics As Per 33 Grade
(NS: 49:2053)
As Per 43 Grade
(IS: 8112:1989)
As Per 53 Grade
(IS: 12269:1987)
Maruti Cement  Grade OPC
A Chemical Analysis        
1. LSF (Lime Saturation Factor) Not greater than 1.02 Not less than 0.66 Not greater than 1.02 Not less than 0.66 Not greater than 1.02 Not less than 0.66 0.92
2. AM (Alumina Modulus) Not less than 0.66 Not less than 0.66 Not less than 0.66 1.37
3. Insoluble Residue (% Mass) Not more than 2% Not more than 2% Not more than 2% 1.69
4. Magnesia (% Mass) Maximum 5% Maximum 5% Maximum 5% 2.25
5. Sulphuric Anhydride (SO3) Maximum 3% Maximum 3% Maximum 3% 2.01
6. Total Loss on Ignition % Maximum 4% Maximum 4% Maximum 4% 1.7
B Physical Requirement        
1. Specific surface (CM2/g) Minimum 2250CM2/g Minimum 2250CM2/g Minimum 2250CM2/g 3000 CM2/g
2. Setting time (minutes)        
  a. Initial setting time Not less than 45minutes Not less than 45minutes Not less than 45minutes 90
  b. Final setting time Not less than 600minutes Not less than 600minutes Not less than 600minutes 215
3. Soundness        
  a. By le-chataller (MM) Not more than 10MM Not more than 10MM Not more than 10MM 1
  b. By Auto clave (%) Not more than 0.8% Not more than 0.8% Not more than 0.8% 0.04
4. Compressive Strength (Kg/Cm2)        
  a. 072+-1hour le; 3 days Minimum 160Kg/Cm2 Minimum 160Kg/Cm2 Minimum 160Kg/Cm2 280Kg/Cm2
  b. 168+-1hours le; 7 days Minimum 220Kg/Cm2 Minimum 330Kg/Cm2 Minimum 370Kg/Cm2 390Kg/Cm2
  c. 672+-4hours le; 28days Minimum 330Kg/Cm2 Minimum 430Kg/Cm2 Minimum 530Kg/Cm2 550Kg/Cm2