RECONSTRUCTION SOLUTION FOR REMOVING COATINGS OF CARCINOGENIC FIBERS USING AN ORGANIC OR INORGANIC CONTRAST AGENT FOR VISUALIZING THE PENETRATION OF HYDROCHLORIC ACID INTO CARCINOGENIC FIBERS
The removal of carcinogenic compounds is regulated in a detailed manner in the Hazardous Substances Ordinance, TRGS 519 "Asbestos: Demolition, reconstruction and maintenance work" and TRGS 521 "Demolition, reconstruction and maintenance work with biopersistent mineral wools", and the Asbestos Directive. The removal is carried out mechanically and is associated with a large time expenditure. The spray compositions can be removed from the substrates without residue only with difficulty. For this purpose, expensive protective measures and cleaning techniques are used. The cleaning process is carried out using dry-ice blasting processes, time-consuming mechanical cleaning processes using brushes, etc. In the case of components with complicated geometries, the carcinogenic fibers cannot be removed without residue. Until now, high fiber expositions have been produced when removing carcinogenic spray compositions. The task consists of finding a pH-stable dye which allows the penetration of hydrochloric acid into amo
