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.

Sripath PGXpand® Improves Rutting of Major Highway in India

PGXpand®, a unique polymer specially engineered by Sripath Technologies, was successfully used by PATH India Ltd to improve rutting performance on a 4-lane km stretch of Agra-Gwalior Highway in India. PGXpand enhances the high temperature properties of bitumen without impacting low temperature properties. A mix based on PGXpand® Modified Bitumen delivers outstanding rutting resistance, fatigue properties, long-term durability, [...]

Real Cost Savings: PGXpand Economic Benefits

Use of PGXpand in paving and roofing formulations yields important cost benefits. In paving mixes, PGXpand typically requires less than half the amount of traditional polymers to yield similar properties. In roofing formulas, PGXpand typically replaces SBS elastomers in a 2:1 or better ratio to yield raw materials savings. Lower SBS percentages lead to reductions in viscosity, thereby supporting [...]

Polymer Blending: PGXpand Mixing Guidelines

Sripath’s PGXpand® is a unique, highly bitumen-compatible, specially engineered polymer. Used for bitumen modification in both the roofing and paving industries, its effectiveness and cost-saving benefits have been tested and proven since 2015. Incorporating PGXpand into bitumen is an endothermic process, meaning the mixture needs to be heated during the entire blending process to maintain the temperature. Proper [...]

Why Specially Engineered Polymers Are the Right Choice

Polymer Modified Membranes have a long history in the roofing and building materials industries. In addition to improving high temperature properties, they provide superior crack resistance, particularly in cold conditions, where they have a high strain capability to cope with thermal shrinkage stresses. Additionally, they offer superior fatigue resistance and durability over standard bitumen. More recently, polymers have [...]