THE USE OF WASTE ROCK FOR ROADS AND BUILDINGS AS AN ...

Building Construction Exposure Scenarios
• FEL Driver at the concrete mixer
– Exposed to the load of gravel aggregate to be mixed with cement.
– Exposure similar to FEL driver at mine but for reduced time of 500 h/a.
• Driver of the mixed concrete truck
– Exposed only to external gamma radiation from the concrete mix.
– Exposure similar to Tarmac Applier in the road construction scenario.
• Builders
– Exposed to the concrete during the pouring of the slabs and subsequently
during building construction.
– Exposure conditions are similar to those of the Tarmac Applier Attendants in
the road construction scenario.
– Concrete is, however, assumed to be 10 cm thick and diluted with sand and
cement to contain 60 % waste rock in the concrete mixture.