Factory Production Control According to the New prEN 13108-21

The European Standard prEN 13108-21 "Bitumious mixtures - Quality - Part 21: Factory production control" describes how mixing plants shall operate their production control. In this project six mixing plants of different age and conception were investigated to show the effects of a quality management system as described in prEN 13108-21 on the results of mixture control. It is intended that the results of this project help to estimate future quality costs and their effects on the price of bitumious mixtures. On the other hand the results should assure that the frequencies set in prEN 13108-21 are realistic and that mixing plants are able to fulfill the requirements of this FPC system.