Refractory cement
Alumina and high alumina cement are used to make fast hardening buildings and heat-resistant mortar and concrete (GB 969-91).
Category：
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 | ||||||
Keywords:
refractory
10
30
300
45
15
vgc
25
0
than
1670
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