Pilotmessungen zur Asbestbelastung auf Strassenbaustellen : Einbau von ungebundenen mineralischen Erzeugnissen aus Steinbrüchen, die unter den Geltungsbereich der TRGS 954 fallen

Certain rock deposits mined for in Germany may contain asbestos. In accordance with TRGS 954 the material is not subject to any restrictions as to its placing on the market and use. Nevertheless, the emission of asbestos fibres cannot be excluded, even if the mass content limit of 0.1% is observed. Pilot measurements were conducted to describe the exposure conditions occurring during the application of crushed stone in road construction and to develop a suitable measuring strategy. It could be shown that measurements on simulated road construction sites in a quarry are not suited to yield exposure results which are comparable to those from a real road construction site. Asbestos fibre concentrations determined for the latter were sometimes clearly below the detection limit of the measuring procedure. In the majority of cases, individual measurements did not reveal any asbestos fibres at all. Asbestos concentrations determined in the quarry during material loading are therefore unlikely to be exceeded during material application on the construction site.