Calcium aluminate refractory cement 70% Alumina
Product Description
CA70 Refractory Cement
Brand | CA70 | CA70W | CA70S | CA71 |
Binding time | medium | short | longer | long |
Cement Properties as per GB201-2000 standard | ||||
SiO2 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 |
Al2O3 | 68.5-70.5 | 68.5-70.5 | 68.5-70.5 | 69.5-71.5 |
Fe2O3 | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 |
CaO | 28.5-30.5 | 28.5-30.5 | 28.5-30.5 | 27.5-29.5 |
MgO | ≤0.4 | ≤0.4 | ≤0.4 | ≤0.4 |
R2O | ≤0.4 | ≤0.4 | ≤0.4 | ≤0.4 |
Fineness | ||||
d50（μm） | 11-14 | 8-11 | 6-9 | 10-13 |
-45μm（%） | ≤8.0 | ≤5.0 | ≤5.0 | ≤8.0 |
Initial setting time minutes | 120-180 | 30-90 | 180-240 | 150-210 |
Final setting time minutes | 150-240 | 90-180 | 240-330 | 210-300 |
1day MOR | 7.5-10.0 | 8.0-10.5 | 8.0-10.5 | 8.5-11.0 |
3 days MOR | 10.0-12.0 | 10.5-12.5 | 10.5-12.5 | 11.0-12.5 |
1day CCS | 40-50 | 45-55 | 45-55 | 50-60 |
3 days CCS | 45-55 | 50-60 | 50-60 | 55-65 |
Castable Properties | ||||
Setting Time（minutes） | ||||
20℃ | 60-90 | 30-60 | 240-300 | 90-120 |
35℃ | 30-50 | 20-40 | 60-120 | 60-90 |
Vibration Flow（mm）（20℃） | ||||
Initial vibration flow | 265-275 | 250-260 | 270-280 | 270-280 |
10 minutes | 255-265 | 245-255 | 260-270 | 260-270 |
30 minutes | 235-245 | 235-245 | 245-255 | 245-255 |
60 minutes | 230-240 | 210-220 | 235-245 | 235-245 |
Flexural Strength（MPa） | ||||
20℃×24hrs | 4.5-5.5 | 4.5-5.5 | 4.5-5.5 | 4.5-5.5 |
110℃×24hrs | 10.0-11.5 | 10.0-11.5 | 10.0-11.5 | 10.0-11.5 |
1100℃×4hrs | 12.0-14.0 | 12.0-14.0 | 12.0-14.0 | 12.0-14.0 |
Compressive Strength（MPa） | ||||
20℃×24hrs | 35-45 | 35-45 | 35-45 | 35-45 |
110℃×24hrs | 85-95 | 85-95 | 85-95 | 85-95 |
1100℃×4hrs | 100-120 | 100-120 | 100-120 | 100-120 |
Linear Change（%） | ||||
1100℃×4h | ≤-0.25 | ≤-0.25 | ≤-0.25 | ≤-0.25 |
CA70 and CA70W do not contain any additives and ɑ-Al2O3. CA70W has a faster setting and hardening speed and higher early strength than CA70, CA70W is suitable for low ambient temperature conditions in winter, and other occasions requiring rapid construction and emergency repairs.
CA70S has good fluidity and long construction time. The prepared castable has ideal construction performance and excellent mechanical strength performance, especially suitable for high temperature environment in summer.
CA71 does not contain any additives and ɑ-Al2O3. With high alumina content, very low water demand, good fluidity and high mechanical strength. It is suitable for the production of low cement, ultra low cement, and low water demand castable.