| abstract |
Residues from asbestos decomposition have so far been deposited. The invention proposes to add residues from the decomposition of asbestos with fluorine-containing inorganic acids, in particular hydrofluoric acid or hexafluorosilicic acid, in the production of building materials. For example, asbestos cement that has been decontaminated in this way can be used to produce setting cement by partially or completely replacing the raw materials (limestone, clay, marl, clay marl and others) with the decontaminated asbestos cement and burning the mixture. The residues can also be used together with hydraulic or non-hydraulic binders to produce unburned building materials. In this way, the landfill of the decomposed asbestos residue is unnecessary. |