Bitumen Degradation Factor
![bdffull bitumen degradation factor charts](https://www.qros.co.uk/wp-content/uploads/2021/03/bdffull.png)
Results
Column 6 on the results page shows the Bitumen Degradation Factor ranging from light (Samples 3, 4 and 5 with BDFs of 1 and 2, showing that the bitumen is fresh,) to heavily degraded (Sample 6, with a BDF of 682.)
NA is shown if coal tar is present as the material is not suitable for recycling.