Product Quality Standard
Red Rajasri is the Ordinary Portland Cement Type 1. Its specification conforms to the Thai Industrial Standard for Mixed Cement TIS 15 Books 1-2547 TYPE 1 which is equivalent to the standard ASTM C
150-04 TYPE I of the United States.
Application
Red Rajasri Brand cement is used for concrete production by blending it with sand, stones, and water
according to required mixture ratio for construction works. Concrete made from Red Rajasri Brand
cement can be used in high compressive strenght works such as buildings, roads, bridges, and dam.
Besides, Red Rajasri Brand cement is also suitable for precast and prestressed product manufacturing
such as solid planks, reinforce concrete drainage pipes, and concrete tiles.
Ingredient
Requirements |
TIS. 15-2547 Vol.1 |
ASTM. C150-04 |
RAJASRI RED |
Chemical Requirements |
|
|
|
Magnesium oxide (MgO) Percent Max. |
6.0 |
6.0 |
3.0 |
Sulfur trioxide (SO3) |
|
|
|
When 3CaO. Al2O3 ≤ 8.0 Percent Max. |
3.0 |
3.0 |
2.5 |
When 3CaO. Al2O3 > 8.0 Percent Max. |
3.5 |
3.5 |
- |
Loss on ignition Percent Max. |
3.0 |
3.0 |
1.5 |
Insoluble residue Percent Max. |
0.75 |
0.75 |
0.5 |
Mineral Requirements |
|
|
|
Tricalcium silicate (C3S) Percent |
- |
- |
58.0 |
Tricalcium aluminate (C3A) Percent |
- |
- |
7.5 |
Physical Requirements |
|
|
|
Air content of mortar Percent Max. |
12.0 |
12.0 |
7.0 |
Fineness: Specific surface by Blaine air |
|
|
|
permeability |
|
|
|
cm2 per |
|
|
|
Average value gm Min. |
2800 |
2800 |
3400 |
Soundness: Autoclave expansion Percent Max. |
0.8 |
0.8 |
0.1 |
Compressive strenght of mortar cube MPa(kgf/cm2) |
|
|
|
1 Day in moist air, 2 days in water Min. |
12.0 (120) |
12.0 (120) |
20.0 (205) |
1 Day in moist air, 6 days in water Min. |
19.0 (195) |
19.0 (195) |
30.0 (305) |
1 Day in moist air, 27 days in water Min. |
- |
- |
40.0(405) |
Time of setting: Vicat test Minute |
|
|
|
Initial Set Min. |
45 |
45 |
95 |
Final Set Max. |
375 |
375 |
220 |
False set , Final penetration Percent Min. |
50.0 |
50.0 |
85.0 |