PMB mixes have been popular for decades and are designed to maintain the integrity of the roadway while enhancing functional performance characteristics. Most virgin bitumen lacks the complete properties needed in quality to build high-performing roadways. Adding polymers to create a PMB can help strengthen and toughen the roadway surface. PGXpand®, a bitumen-friendly polymer additive, is uniquely designed to allow polymer modified bitumen (PMB) producers to boost the high temperature performance of the binder while maintaining low temperature properties. It minimizes SBS content, improves viscosity, supports higher filler loading, and provides better stability.
What is Polymer Modified Bitumen (PMB)?
Bitumen is relied on as the primary binder in asphalt mixes developed for roadway paving, with nearly 90% of the world’s road paved using the material. Despite its widespread use, bitumen as a sole source of binder in a mix has inherent shortcomings. On its own, bitumen can be susceptible to deformations as temperatures change including cracking in extreme [...]
