Nowadays, construction and demolition waste is increasingly recycled. If it has originated from the demolition of buildings constructed up to 1995, it must be assumed that it is contaminated with asbestos or artificial mineral fibres (KMF). If this construction and demolition waste is not handled properly, these carcinogenic substances can be released. Sampling for asbestos and artificial mineral fibres is therefore required. When planning the disposal of demolition waste, the possible contamination must also be assessed.
According to the standard VDI 3876, construction and demolition waste can be analysed for asbestos with a detection limit (LOD) of < 0.005 mass percent. However, the same method can also be used to determine artificial mineral fibres. The sampling required for this must be carried out in accordance with LAGA PN 98.
The samples are divided into individual fractions in the laboratory by means of sieving. Coarse fractions are subjected to a visual inspection by an experienced employee using a reflected light microscope. Suspicious particles are examined for asbestos according to VDI 3866 guidelines. Particles containing asbestos determined in this way are weighed and converted to the total mass of the sample. Finer fractions are examined in detail according to IFA 7487.