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$Refractory cement$ $Refractory cement$

Alumina and high alumina cement are used to make fast hardening buildings and heat-resistant mortar and concrete (GB 969-91).

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Description

Index item	Specification standard
	GC			VGCⅠ	VGCⅡ		VGC Ⅲ
	40	50	60	35	25	35	25
GB code	969-91
Compressive strength，Mpa，＞， age：
1 day	22,5	27,4	32,4	-	-	-	-
3 days	40,0	50,0	60,0	35,0	25,0	35,0	25,0
Fineness of grinding
Screen № 008 residue according to GB 6613，＜	10	10	10	10	10	10	10
Specific surface area,m²/kg,＞	-	-	-	300	300	300	300
Binding period：
Beginning， minute， not early than	45	45	45	30	30	30	30
Ending， hour， not late than	10	10	10	12	15	15	15
Refractoriness，℃，＞	-	-	-	1580	1670	1670	1750
Usage	Used to make fast hardening buildings and heat-resistant mortar and concrete