CALCIUM ALUMINATE CEMENT

an aluminate cement wrought material based upon calcium aluminate;used to projects with special requirements.

  

It is a kind of aluminate cement wrought material based upon calcium aluminate, it is called Aluminate cement when it has been finegrinded to hydraulicity cementing material, its code is CA. When the cement has a grinded Al2O3 content of above 68%, it can be added with appropriate amount of α-Al2O3 powder as requirement.

Aluminate cement can be classified into four kinds by Al2O3 content:

CA-50, CA-60, CA-70,CA-80

It can be used to formulate unshape refractory material; expansive cement, self-stressing cement, addition material of chemical construction material and projects with special requirements.

SPECIFICATIONS

                Table 1 Chemical Composition                      %

Item	Al2O3	SiO2	Fe2O3	R2O(Na2O+0.658K2O)	S1) (total sulfur)	Cl1)
CA-50	≥50,<60	≤8.0	≤2.5	≤0.40	≤0.1	≤0.1
CA-60	≥60,<68	≤5.0	≤2.0
CA-70	≥68,<77	≤1.0	≤0.7
CA-80	≥77	≤0.5	≤0.5
1)Manufacturer may provide results and detection methods if the users need.

                                    Table 2 Setting time

Item	Initial setting time is not earlier than,min	Final setting time is not later than,h
CA-50,CA-70,CA-80	30	6
CA-60	60	18

        

                           Table 3 Cement Slurry Strength

 

Item	Cold Crushing Strength,  MPa				Breaking strength, MPa
	6h	1d	3d	28d	6h	1d	3d	28d
CA-50	201)	40	50		3.01)	5.5	6.5
CA-60		20	45	85		2.5	5.0	10.0
CA-70		30	40			5.0	6.0
CA-80		25	30			4.0	5.0
1)Manufacturer may provide results and detection methods if the users need.

CALCIUM ALUMINATE CEMENT