High Alumina Cement Introduce
High Alumina Cement (previously called bauxite cement) is a kind of grinding hydraulic cementing
materials with clinker about 50% alumina content and has calcium aluminate as the main material,
which is also called refractory cement, which can be made to low cement high alumina castable to build
or repair all kinds of furnace and kilns for thermal insulation or acid erosion resistance with high strength.
High alumina cement is mainly used in urgent project schedules, such as pressure defense, road and special
repair projects
|
Item
|
CA-50
|
CA-60
|
CA-70
|
CA-80
|
|
Chemical component
|
Al2O3 /%
|
50-60
|
60-68
|
68-77
|
≥77
|
|
|
SiO2 /%
|
≤8.0
|
≤5.0
|
≤1.0
|
≤0.5
|
|
|
Fe2O3 /%
|
≤2.5
|
≤2.0
|
≤0.7
|
0.5
|
|
|
R2O
(Na2O+0.658K2O) /%
|
≤0.4
|
≤0.4
|
≤0.4
|
≤0.4
|
|
Rupture strength MPa
|
1day
|
5.5
|
2.5
|
5.0
|
4.0
|
|
|
3days
|
6.5
|
5.0
|
6.0
|
5.0
|
|
|
28days
|
/
|
10.0
|
/
|
/
|
|
Compressive strength MPa
|
1day
|
40
|
20
|
30
|
25
|
|
|
3days
|
50
|
45
|
40
|
30
|
|
|
28days
|
/
|
80
|
/
|
/
|
|
Setting time Min
|
Initial time
|
≥30
|
≥60
|
≥30
|
≥30
|
|
|
Final time
|
≤360
|
≤1080
|
≤360
|
≤360
|
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