PGXpand Archives

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.

PGXpand® and Asphalt Performance in Extreme Climates

As infrastructure owners and contractors face increasingly volatile weather patterns, the demand for a climate-resilient asphalt binder has never been greater. From freeze-thaw cycles in northern regions to sustained high temperatures in the south and southwest, asphalt pavements are under constant stress. Performance is no longer defined solely by average conditions but rather a consideration of performance at extremes. Polymer modified bitumen (PMB) has long been [...]

PGXpand®: The Road to Better Bitumen Performance

Innovation is often the result of years of asking the right questions, testing assumptions, and refining ideas until chemistry and application finally align. As Sripath Technologies celebrates 20 years of innovation, PGXpand® stands as a clear example of this philosophy in action. PGXpand was not developed to simply replicate what existing polymers already did for bitumen. Instead, its development began with a more fundamental challenge: [...]

Sripath Asphalt Additives and Proven Durability in Roadway and Roofing Applications

In modern asphalt mix design, the use of high-quality asphalt additives has become essential to improve performance, sustainability, and long-term durability. Whether the goal is to incorporate higher amounts of Reclaimed Asphalt Pavement (RAP), reduce production and compaction temperatures, or optimize polymer-modified bitumen (PMB) blends, additives can help producers achieve these objectives without compromising pavement life. Sripath has developed a suite of innovative additives including ReLIXER®, PGXpand®, [...]

How PGXpand is Evolving Polymer Modified Asphalt

Polymer modified asphalt (PMA), or polymer modified bitumen, has long been used to improve pavement durability under increasing traffic loads, climate variability, and performance-based specifications. Traditionally, PMA has relied on elastomeric or plastomeric polymers to enhance specific properties such as rutting resistance and durability. While effective, these approaches often introduce challenges related to storage stability, viscosity control, energy consumption, and cost. As the asphalt industry continues [...]