| 摘要 |
<p>Fire-resistant prefabricated structural element having a relatively small average thickness, comprising a substrate based on cured plaster, said substrate being able to be obtained by hydration, for example mixing, of dry matter comprising mostly at least a hydratable calcium sulfate, and a mineral additive in discrete form, comprising a clayey material, characterized in that the mineral additive essentially comprises a clayey material, the quantity of crystalline silica of which is at most equal to approximately 15% by weight of said mineral additive, and an inert mineral supplement compatible with the clayey material and dispersible in the cured-plaster substrate.</p> |
