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QIANG Calcium Aluminate Cement-Calcium Aluminate Cement CA50-G7
Calcium Aluminate cement CA50-G7 is produced by preparing raw meal consisting of applicable bauxite and limestone,calcining the raw meal in rotary kiln and grinding the clinker, which contains Al2O3 50-59%. It was called bauxite cement for a time and also called "refractory cement" based on its main usage. The name "Calcium aluminate cement" is specified by the national standard now.
The main minerals in aluminate are monocalcium aluminate (CA), monocalcium dialuminate (CA2), "12:7" calcium aluminate (C12A7), gehlenite (C2AS), minor perovskite (CT) and dicalcium ferrite (C2F). Among these minerals, CA hydrates rapidly and sets normally with characters of rapid hardening and early strengthening; CA2 hydrates slowly and contributes to late strength. The compressive strength at 3d for the cement reaches about 90% of the maximum strength, thus in the national standard, the compressive and flexural strengths at 1d, 3d are specified to determine cement grades.
The calcium aluminate cement can resist a high temperature at which a relative high strength still remains. Its refractoriness increases with the content of CA2. Therefore it is suitable to make refractory concrete as a binder. Depending on the refractory aggregates (firecaly,high alumina) used, the refractory concrete made of the cement can be used below 1400℃.
Chemical Composition
Item |
Unit |
CA50-G7 |
Al2O3 |
% |
51 Min |
SiO2 |
% |
8.0 Max |
Fe2O3 |
% |
2.5 Max |
CaO |
% |
33 Min |
Physical Property
Item |
Unit |
CA50-G7 |
|
Fineness(0.045mm sieve residue) |
% |
＜20 |
|
Blaine specific surface area |
m2/kg |
≥300 |
|
Time of setting |
Initial setting time |
minute |
≥0:30 |
Final setting time |
minute |
≤6:00 |
|
Compression strength |
24 hour |
Mpa |
50 |
72 hour |
Mpa |
60 |
|
Flexural strength |
24 hour |
Mpa |
6.5 |
72 hour |
Mpa |
7.5 |
|
This series of products contains no additives, assuring the applicability and stability of products.
Packing:in 25kg paper bags
Stock:Keep in dry conditions and prevent humidity during storage and transportation. Don’t mix with other variety of cements.
Online order High quality High temp Calcium Aluminate Cement A600,CA50-G7 and High Pure Calcium Aluminate Cement CA70 and CA80 now.
Site:http://www.calciumaluminate-cement.com
E-mail:duan@aluminacement.com
MSN:calciumaluminatecement@hotmail.com
SKYPE:calciumaluminatecement
Fax:+86-371-87527863,Tel:+86-371-68083078