|
Portland cement
|
42.5
|
42.5R
|
||||||
|
Items
|
Units
|
National
|
Internal
|
National
|
Internal
|
|||
|
Sample size
|
Kg
|
/
|
6.0
|
/
|
6.0
|
|||
|
SO3
|
%
|
≤3.5
|
2.44
|
≤3.5
|
2.8
|
|||
|
MgO
|
%
|
≤6.0
|
1.32
|
≤6.0
|
1.4
|
|||
|
Cl
|
%
|
≤0.06
|
0.021
|
≤0.06
|
0.02
|
|||
|
Loss
|
%
|
≤5.0
|
3.74
|
≤5.0
|
4.0
|
|||
|
Fineness
(specific surface)
|
㎡/kg
|
≥300
|
358
|
≥300
|
385
|
|||
|
Standard consistency water
|
%
|
/
|
28.0
|
/
|
28.0
|
|||
|
Time
|
Initial
|
H:Min
|
≥0:45
|
4:50
|
≥45
|
228
|
||
|
Final
|
H:Min
|
≤10:00
|
5:45
|
≤600
|
368
|
|||
|
Soundness pat test
|
/
|
past
|
/
|
past
|
||||
|
Bending strength
|
3d
|
MPa
|
≥3.5
|
5.1
|
≥4.0
|
6.2
|
||
|
28d
|
MPa
|
≥6.5
|
8.6
|
≥6.5
|
9.2
|
|||
|
Compressive
strength
|
3d
|
MPa
|
≥17.0
|
26.6
|
≥22.0
|
30
|
||
|
28d
|
MPa
|
≥42.5
|
50.9
|
≥42.5
|
52.6
|
|||
