| 摘要 |
The refractory board for coating steel frames in a structure is composed of 70-80 wt% gypsum, 10-20 wt% xonotlite type calcium silicate of hollow sphere and needle-like crystalline structure, which has good thermal insulating and heat resistance properties, 0.2-5 wt% asbestos, 0.1-1.0 wt% curing agent such as aluminum sulfate, potassium sulfate, etc., 0.1-1.0 wt% thickener such as polyvinyl alcohol, methyl cellulose, etc., and 100-200 wt% water.
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