Physical and Chemical Properties of Ordinary Portland Cement (OPC) of Various Grades

 

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