Calcium Sulfoaluminate Binder
(CSA Binder)
Summary
● Calcium Sulphoaluminate Powder, also simply named CSA Binder, is one of hydrulic binding materials.
● CSA Binder is a kind of semi-product for making various cements. It is main composition of rapid-setting cement, expansion cement, self-stressing cement.
● CSA Binder is also used as accelerating admixture, rapid setting admixture and expansion admixture of Portland Cement.
● Type: 1(ordinary type), 2(high-strength type)
Technical Data
Index |
Standard Value |
Type 1 |
Type 2 |
Chemical Composition |
|
|
SiO2 |
%, |
10.0 Max |
8.0 Max |
Al2O3 |
% |
About 30.0 |
36.0 Min |
Fe2O3 |
% |
1.5 - 3.0 |
1.5 - 3.0 |
CaO |
% |
40.0- 50.0 |
38.0 - 45.0 |
MgO |
% |
1.0 - 2.5 |
1.0 - 2.5 |
SO3 |
% |
7.0 - 10.0 |
7.0-10.0 |
Physical Performance |
|
|
Blaine Surface |
Cm2/g |
4000-5500 |
4500-5500 |
Initial Setting |
Minute |
about 10- 90 |
about 10 - 90 |
Final Setting |
Minute |
about 15 - 180 |
about 15 - 180 |
Compressive Strength |
1d, Mpa |
40.0 Min |
50.0 Min |
3d, Mpa |
60.0 Min |
80.0 Min |
Breaking Strength |
1d, Mpa |
6.0 Min |
7.0 Min |
3d, Mpa |
7.0 Min |
9.0 Min |
Mineral Composition |
|
Yeelimite(C4A3S) |
% |
50.0-75.0 |
Belite(C2S) |
% |
0-22.0 |
Brownmillerite(C4AF) |
% |
0-8.0 |
Perovskite(CT) |
% |
0-10.0 |
Characteristics
● Appearance: powder with light dusty grey color
● High early strength
● Rapid setting
● Micro expansion
● Low degree of shrinkage
● Feeble rust to steel
● Resistance to freezing and thawing
● Impermeability
● Resistance to sulfate attack
● Specific gravity: about 2.6-2.8g/cm³