Produced by calcining industrial aluminium oxide and fine limestone under strict mineralogical control in rotary kilns into clinker, cooling then grinding in ball mill. The content of alumina is approx. 70% in CA70 aluminate cement.
CA70 include several varieties as follows:
CA70-E
Early strength
Character & uses:
1. Without any additives.
2. Suitable to confect high pure refractory castables, low cement and ultra low cement castables.
3. Suitable for use in winter.
CA70-G
General
1. Without any additives
2. Suitable to confect all kinds of refractory castables, low cement and ultra low cement castables.
3. High strength
CA70-A
Additives
1. Containing a little additives
2. Good fowability
3. Long constructing control time
4. Suitable use in Summer.
Specification:
Chemical composition %
Al2O3 77
SiO2 1.0
Fe2O3 0.7
R2O3 0.4
S (0.1)
Cl (0.1)
Physical properties
Fineness
0.045 Residue % (20max)
Blaine m2/kg 600min
Setting time
Initial min 30
Final h 6
CA70-E CA70-G CA70-A
Flexural strength Mpa
6h 3.0 - -
1d 5.5 5.0 5.5
3d 6.5 6.0 6.5
Compressive strength Mpa
6h 15 - -
1d 40 40 40
3d 50 30 50
Note: Data in () is according with the regulations of GB201-2000 (China National Standard).
Data of setting time cannot be provided in case that customer requires additive cement.