MODIFICATION OF ASPHALT AND BITUMEN IN ROAD CONSTRUCTION
Throughout the world, both local and national authorities know that it is good business to use modified asphalt in new road projects. It is cost-efficient both medium- and long-term, because roads are less exposed to rutting and cracking. This reduces maintenance, which is not only a financial problem, but also a traffic-related problem, as roads must be partly closed during maintenance work.
The most common way to modify bitumen in modern road construction is to use the synthetic rubber SBS (styrene-butadiene-styrene). SBS is made from scarce virgin resources and is thus not only costly from an economical point of view – but also environmentally. However, SBS as a bitumen modifier may be substituted by recycled rubber powder (GENAN FINE POWDER, 0.2-0.8 mm); and this has now become standard technology with years of practical experience throughout the world.