PHYSICAL & CHEMICAL PROPERTIES OF OPC OF VARIOUS GRADES
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
|
