This is designed to render high early compressive strength. It is manufactured in accordance with the Thai Industrial Standards Institute's specification for portland cement TIS 15 - 2547 Type 3 and the American ASTM C-150 Type III.
Property : Suitable for the use in concrete work which requires support strength and quick setting as well as for the manufacturing of all prestressed concrete products, e.g. concrete piles, floor slabs, beams, and pylons.
|
According to the American Standard Specification for |
Guarantee Specification |
||
|
ASTM C 114 |
|
|
| Silicon dioxide |
(SiO2) |
% |
- |
|
Aluminium oxide |
(AI2O3) |
% |
- |
|
Ferric oxide |
(Fe2O3) |
% |
- |
|
Calcium oxide |
(CaO) |
% |
- |
|
Magnesium oxide |
(MgO) |
% |
max 6.0 |
|
Sulfur trioxide |
(SO3) |
% |
max 3.5 |
|
Loss of ignition |
(LOI) |
% |
max 3.0 |
|
Insoluble residue |
(IR) |
% |
max 0.75 |
|
Tricalcium silicate |
(C3S) |
% |
- |
|
Tricalcium aluminate |
(C3A) |
% |
max 15 |
| Total Alkalies (Na2O + 0.658 K2O) |
max 0.6 |
||
|
|
||
|
Fineness ; Specific surface Air permeability test |
ASTM C 204 |
m2/kg |
- |
|
Soundness : Autoclave expansion |
ASTM C 151 |
% |
max 0.8 |
|
Time of setting ; Vicat test; |
ASTM C 191 |
||
|
initial set |
mins |
min 45 |
|
|
final set |
mins |
max 375 |
|
|
Air content of mortar volume |
ASTM C 185 |
% |
max 12 |
|
*False set |
ASTM C 451 |
% |
min 50 |
|
Compressive Strength ; Mortar cubes; |
ASTM C 109 |
psi (MPa)[ksc] |
|
|
1 day |
min 1740 (12.0)[122] |
||
|
3 days |
min 3480 (24.0)[245] |
||
|
7 days |
- |
||
|
28 days |
- |
||
Remark : * Means Optional Requirements