Air Solutions
White Portland cement or white ordinary Portland cement (WOPC) is similar to ordinary, gray Portland cement in all aspects except for its high degree of whiteness. Obtaining this color requires substantial modification to the method of manufacture, and because of this, it is somewhat more expensive than the gray product.
|
Parameter |
|
Typical Value |
Range |
Unit |
|
Silicon Dioxide |
SiO2 |
21.5-22.5 |
|
% |
|
Aluminium Oxide |
Al2O3 |
5.1-5.7 |
|
% |
|
Ferric Oxide |
Fe2O3 |
0.45-0.55 |
|
% |
|
Calcium Oxide |
CaO |
64-65.5 |
|
% |
|
Magnesium Oxide |
MgO |
1.6-2.5 |
Max 5 |
% |
|
Sulphur Trioxide |
SO3 |
2.5-3 |
Max 3.5 |
% |
|
Potassium Oxide |
K2O |
0.2-0.3 |
|
% |
|
Sodium Oxide |
Na2O |
0.08-0.15 |
|
% |
|
Loss On Ignition |
L.O.I |
2.0-3.0 |
Max 3 |
% |
|
Insoluble Residue |
I.R. |
0.2-0.5 |
Max 0.75 |
% |
|
Free Lime |
Fca |
1.8-2.5 |
|
% |
|
Lime Saturation Factor |
LSF |
89.9-92 |
|
% |
|
Silica Module |
SIM |
3.5-4.0 |
|
% |
|
Alumina Module |
ALM |
11.0-14.0 |
|
% |
|
Tricalcium Silicate |
C3S |
51-55 |
|
% |
|
Dicalcium Silicate |
C2S |
22-27 |
|
% |
|
Tricalcium Aluminate |
C3A |
13-15 |
|
% |
|
Tetracalcium Alumino Ferrit |
C4AF |
1.3-1.8 |
|
% |
|
Whiteness |
Hunter scale |
88-90 |
|
% |
|
Whiteness |
Y value |
76-78 |
|
% |
|
Physical and Mechanical Analysis |
Autoclave Expansion |
0.02-0.1 |
|
% |
|
Specific Surface |
3600-4000 |
Min 3000 |
cm2/gr |
|
|
Initial Setting Time |
60-80 |
Min 45 |
minute |
|
|
Final Setting Time |
110-150 |
Max 480 |
minute |
|
|
Compresive Strength |
3 days |
18.0-22.0 |
Min 11.0 |
Mpa |
|
7 days |
28.0-32.0 |
Min 17.5 |
Mpa |
|
|
28 days |
40.0-45.0 |
Min 31.5 |
Mpa |
