ASPHALT AND BITUMEN MODIFICATION IN ROAD CONSTRUCTION
Road authorities across the globe know that using modified asphalt in new road projects is good business. It is cost-efficient in the medium and long term because the roads are less prone to rutting and cracking. This reduces maintenance, which is both a financial and 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 SBS (styrene-butadiene-styrene), a synthetic rubber. SBS is made from scarce virgin resources and is not only costly from an economical point of view – but also environmentally. However, SBS as a bitumen modifier can be substituted by coarse, recycled rubber powder (0.2-0.8 mm). This has now become a standard technology with years of practical experience across the globe.