AOWO® High Efficient Concrete Expansive Agent
Characteristics
Expansive Additive I is powdered material, which made by grinding special mineral together with additives. The fineness is less than 10%; the specific weight is 2.90; Non-toxic, non-odour; No ammonia, no chlorine.
Chemical composition and Alkali content:
Loss |
SiO2 |
Al2O3 |
Fe2O3 |
CaO |
MgO |
SO3 |
K2O |
Na2O |
1.10 |
9.20 |
20.50 |
0.65 |
34.50 |
2.35 |
30.55 |
0.20 |
0.10 |
Physical Index :
Index of cement mortar when adding Expansive Additive I
Numb-er
|
Add-ing
Amount |
Setting
Time |
Limited Expansive Rate(%) |
Compressing
Strength
(Mpa) |
Bending
Strength
(Mpa) |
Alkali
Content
(%) |
MgO
(%) |
CL |
Initial
Time |
Final
Time |
7d
in water |
28d
in
water |
28d
in
air |
7d |
28d |
7d |
28d |
1 |
6% |
3:20 |
4:00 |
0.030 |
0.042 |
-0.012 |
49.8 |
62.9 |
6.7 |
8.1 |
0.30 |
2.31 |
0.001 |
2 |
7% |
3:15 |
4:10 |
0.041 |
0.051 |
-0.010 |
45.1 |
59.2 |
6.4 |
7.9 |
0.30 |
2.31 |
0.001 |
3 |
8% |
3:00 |
3:50 |
0.043 |
0.058 |
-0.008 |
44.5 |
58.5 |
5.9 |
7.5 |
0.30 |
2.31 |
0.001 |
Performance:
- As making shrinkage compensated concrete, if the ratio of reinforcement is 0.2%-1.0%, the limited expansive rate will be in the range of 0.02-0.04%, and a prestress of 0.2-0.7Mpa exists in the concrete.
- Comparing with the concrete without Expansive Additive I, in the condition of defined mixing amount, the free strength of the concrete with Expansive Additive I is roughly equal to that of concrete without Expansive Additive I. The limited strength is 10~15% higher than free strength.
- The impermeability grade of mortar and concrete can reach over S30. The elastic ratio closes to that of common concrete.
- Anti freezing: D150.
- Sulphate resistance of concrete is increased. No pollution to water.
- For structural self-waterproofing construction. Effectively preventing cracking or leakage of concrete.
- To extend the space length of post casting zone of cast-in-place overlength structure.
- To control the crack producing result of temperature difference in large sized structural concrete.
- For rigid roofing.
- Making non-shrinkage cements.
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