CALCIUM ALUMINATE CEMENT


 

Calcium Aluminate Cement is produced as following: first preparing raw material which consist of applicable bauxite and limestone, and burning it into clinker in rotary kiln, then grinding. It was called bauxite cement for a time and also called “refractory cement” based on its main usage. The name “Aluminate Cement” is specified by Chinese national standard.


Character & uses:


The main minerals in Aluminate Cement 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, characteristic of rapid hardening and early strengthening, CA2 hydrates slowly and contributes to late strength, the compressive strength at 3 d for the cement reaches about 90% of the maximum strength, thus in the national standard the compressive and flexural strength at 1, 3d are specified to determine cement grades.


Sunteks Aluminte Cement enjoys the following advantages :


 Control of setting time

 Rapid hardening 

 Fast drying

 Size variation control 

 Resistance to corrosion 

 Resistance to abrasion 

 High mechanical strength. 

 

Building grade:


CA50-G5

CA50-G6

CA50-G7

CA50-G8

CA50-G9

component

CA

CA2, C12A7, CT, C2AS

BET (m2/g)

300 min

400 min

Setting time minute

initial

30 min

90 min

120 min

final

360 max

480 max

Flexural strength MPa

24h

5.5

6

6.5

8

10

72h

6.5

7

7.5

10

11

Compressive strength MPa

24h

40

45

50

70

75

72h

50

55

60

80

80



Refractory garde:


CA-65

CA-70

CA-75

CA-80

Chemical

Al2O3

63% min

68% min

73% min

78% min

CaO

35% max

30% max

25% max

20% max

SiO2

1% max

1% max

1% max

0.5% max

Fe2O3

1% max

0.7% max

0.7% max

0.5% max

component

CA

CA2

CA2, a-Al2O3

BET (m2/g)

450 min

600 min

650 min

Setting time minute

initial

30 min

final

360 max

Flexural strength MPa

24h

5.5

5

5

4

72h

6

6

6

5

Compressive strength MPa

24h

40

30

30

25

72h

50

40

40

30

If you have any question, please contact us