Plaster-based prefabricated construction element especially a plaster-based slab with increased fire resistance

摘要

A refractory prefabricated building having a relatively thin average thickness, comprising at least one dry admixture of calcium hydrate and at least one mineral additive in the form of a discontinuous clay containing material, said mineral admixture being substantially compatible with the clay material and the clay material And an inert mineral component dispersible in the hardened plaster substrate, wherein the content of crystalline silica in the clay material is less than or equal to about 15% of the mineral additive.