Warm mix asphalt technologies allow for 20-55°C reduction in asphalt mix production and placement temperature, enabling reduction in asphalt mixture fume emissions and lower fuel consumption during asphalt mixture production. Often these technologies carry an additional benefit of improving the asphalt mixture compactability. Sometimes a question may arise regarding the compatibility of the warm mix technologies with SBS modified bitumen. The answer to this question is simple: Extensive field experience proves that SBS modified bitumen can be successfully used in conjunction with all three warm mix asphalt technology types: Foaming processes, Wax (organic) additives, Surfactant additives. Click here for examples of specific wma technologies.
Field experience with PmB pavements provides evidence that the polymer network remains highly functional many years after the original construction. Swiss field study shows sustained performance of PmB recovered from the road wearing course 19 years after construction (6). If handled properly, the PmB can be successfully reused in a new pavement.