Refractory Cement

Combined with various refractory raw materials and appropriate additives (regulators, water reducing agents) to form various unshaped refractory materials.

CA50

Al2O3: ≥50-53.5%;
Initial Setting Time: ≥45-90min;
Final Setting Time: ≤6min;
72H Compressive Strength: 55-82MPa;

CA70

Al2O3: ≥68.5-71.5%;
Initial Setting Time: ≥120-240min;
Final Setting Time: ≤90-300min;
72H Compressive Strength: 45-65MPa;

CA80

Al2O3: ≥78-81%;
Initial Setting Time: ≥30-150min;
Final Setting Time: ≤90-350min;
72H Compressive Strength: 40-50MPa;

Technical Data

Item/Grade			CA50			CA70				CA80
			A600	A700	A900	CA70	CA70W	CA70S	CA71	CA80	CA80S
Chemical Composition	ω (SiO₂) ≤/%		7.8	7.5	5.5	0.5	0.5	0.5	0.5	0.5	0.5
	ω (Al₂O₃)/%		50.0	51.0	53.5	68.5-70.5	68.5-70.5	68.5-70.5	69.5-71.5	78.0-81.0	78.0-81.0
	ω (Fe₂O₃) ≤/%		2.5	2.5	2.5	0.2	0.2	0.2	0.2	0.2	0.2
	ω (CaO)/%		/	/	/	28.5-30.5	28.5-30.5	28.5-30.5	27.5-29.5	17.5-20.5	17.5-20.5
	ω (MgO) ≤/%		/	/	/	0.4	0.4	0.4	0.4	0.4	0.4
	ω (R₂O) ≤/%		0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4
	ω (S) ≤/%		0.1	0.1	0.1	/	/	/	/	/	/
	ω (Cl) ≤/%		0.1	0.1	0.1	/	/	/	/	/	/
Fineness	d50/μm		/	/	/	11-4	8-11	6-9	10-13	5-8	5-8
Fineness	-45μm ≤/%		/	/	/	8.0	5.0	5.0	8.0	5.0	5.0
Setting Time	Initial Setting Time (min)		≥45	≥60	≥90	120-180	30-90	180-240	150-210	30-90	90-150
Setting Time	Final Setting Time (min)		≤6	≤6	≤6	150-240	90-180	240-330	210-300	90-180	270-360
Strength (ISO)	Flexural Strength/Mpa	24h	6.0	6.5	8.0	7.5-10.0	8.0-10.5	8.0-10.5	8.5-11.0	5.0-7.5	5.0-7.5
	Flexural Strength/Mpa	72h	7.0	7.5	10.0	10.0-12.0	10.5-12.5	10.5-12.5	11.0-12.5	6.0-8.5	6.0-8.5
	Compressive Strength/Mpa	24h	45	55	72	40-50	45-55	45-55	50-60	30-40	30-40
	Compressive Strength/Mpa	72h	55	65	82	45-55	50-60	50-60	55-65	40-50	40-50
325M ≤/%			15	12	8	/	/	/	/	/	/
Specific Surface Areas ≥/ (㎡/kg)			300	320	350	/	/	/	/	/	/

$Refractory Cement$