There are many different types and brands of tyres, which typically
also have different rubber compositions. Once tyres reach
their end-of-life they will be, if intended for recycling, accumulated
irrespective of their particular rubber composition. At present the
main selection criterion is tyre type, separating mainly between
truck tyres (TT) and passenger car tyres (PCT). In order to effi-
ciently use these mixtures of waste tyres for recycling purposes,
their actual rubber composition is an inconvenient unknown.