| 摘要 |
The present invention relates to a composition intended for the preparation of facings by spraying by means of a hose a mixture based on rock wool (A), the composition having an almost instantaneous setting time and a formulation necessarily comprising a combination of (1) at least one powder product (B) containing at least 30% of sodium or potassium bicarbonate, the remainder comprising a compound of acid nature selected from the group comprising calcium chloride, sulfamic acid and sodium bicarbonate, in association with or without association with a solid silicate of sodium or potassium and (2) of at least an aqueous solution (C) of sodium or potassium silicate.
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