Calcium Aluminate Cement

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.

Suntek’s 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