|
GB175-2007 42.5R equivalent to according to BS-12:1996
|
Chemical analysis
|
Unit
|
Control Range
|
Typical
|
|
SiO 2
|
%
|
23.5-25.5
|
24
|
|
Al 2 O 3
|
%
|
8.0-9.0
|
8.65
|
|
Fe 2 O 3
|
%
|
3.0-4.0
|
3.44
|
|
MgO
|
%
|
2.5-4.5
|
3.44
|
|
SO 3
|
%
|
2.1-3.0
|
2.62
|
|
F-CaO
|
%
|
<1.50
|
1.0
|
|
Loss on lgnition(LOI)
|
%
|
<5.0
|
3.12
|
|
Equivalent alkalies
|
%
|
<0.75
|
0.70
|
|
Physical analysis
|
|
|
|
|
Blaine Fineness
|
m 2 /kg
|
350-410
|
380
|
|
Time of Set(Vicat)
|
|
|
|
|
Initial Set
|
min
|
>90
|
120
|
|
Final Set
|
min
|
<300
|
280
|
|
Compressive Strength
|
|
|
|
|
3Days
|
Mpa
|
>25
|
27.9
|
|
28Days
|
Mpa
|
>46
|
48.1
|
|
|
English
Chinese
Cement BS-12:1996 Cement
