Physical and chemical properties of OPC of different grades


Physical and Chemical Properties of Ordinary Portland Cement (OPC) of different grades:

Type of Cement 33 Grade

(IS: 269-1989)

43 Grade

(IS:8112-1989)

53 Grade

(IS: 12269-1987)

Physical Properties
Minimum Compressive Strength, N/mm2
3 day 16 23 27
7 day 22 33 37
28 day 33 43 53
Fineness
Minimum specific surface (Blaine’s air permeability) m2/kg 225 225 225
Setting times (minutes)
Initial, minimum 30 30 30
Final, maximum 600 600 600
Type of Cement 33 Grade

(IS: 269-1989)

43 Grade

(IS:8112-1989)

53 Grade

(IS: 12269-1987)

PHYSICAL PROPERITES
Minimum Compressive Strength, N/mm2
3 day 16 23 27
7 day 22 33 37
28 day 33 43 53
Fineness
Minimum specific surface (Blaine’s air permeability) m2/kg 225 225 225
Setting times (minutes)
Initial, minimum 30 30 30
Final, maximum 600 600 600
Soundness, expansion (Le Chatelier Test, mm), maximum 10.0 10.0 10.0
Autoclave test for MgO, percent, maximum 0.8 0.8 0.8
CHEMICAL PROPERTIES
Loss on ignition, percent, maximum 5 5 4
Insoluble residue, percent, maximum 4 2 2
Magnesia Mgo, percent maximum 6 6 6
SO3 , percent, maximum for:
C3A>5 percent 2.5 2.5 2.5
C3A<5 percent 3 3 3
 
Lime saturation factor (LSF) 0.66 to 1.02 0.66 to 1.02 0.8 to 1.02