PGXpand®: A Specially-Engineered Innovative Polymer

Sripath Technologies LLC develops, manufactures and markets a wide range of innovative additives, such as, rejuvenators, oils, anti-strip agents, and polymers to enhance the performance of bitumen for both paving and roofing applications. Sripath Technologies, located in New Jersey USA since 2006, has affiliates around the world: Sripath Innovations Ltd in London UK, Bitpath Pvt. Ltd. in Mumbai India and Sripath Asia-Pac Pty. Ltd. in Melbourne Australia.
March 7, 2022 Read time: 2 mins

 

A key product offered by Sripath is PGXpand – a specially-engineered innovative polymer used to enhance the high temperature properties of bitumen without impacting the low temperature properties.  PGXpand is a highly bitumen-compatible plastomeric polymer.  It has been specifically designed to interact with bitumen in a very unique and innovative manner, allowing the product to deliver outstanding roadway performance, even though it does not confer any significant elastic recovery properties to the bitumen.

PGXpand polymer easily melts into bitumen, mixes into bitumen using low shear mixers, lowers mixing temperatures and shortens mixing times.  It is easy to incorporate into a mix plant and exhibits excellent storage stability.  PGXpand is highly dosage efficient, it lowers the viscosity of bitumen and aids in lowering the paving temperature.  It helps lower energy consumption and reduces overall costs.

This polymer interacts with bitumen in a unique fashion and tends to provide exceptional properties to the PGXpand Modified Bitumen hot mixes.  PGXpand improves the key performance qualities of Bitumen, such as, softening point, penetration, and true high grade.  It lowers viscosity of the PMB mix, improves its workability and makes the mix easier to compact.  PGXpand delivers roadways with outstanding rutting resistance, fatigue properties and long-term durability.

For Hybrid PMB systems, PGXpand is highly compatible with elastomeric polymers.  It allows engineers to design mixes with lower levels of elastomeric polymers while delivery better or equivalent roadway properties.  Hybrid PMB mixes made using PGXpand have lower viscosity, better workability, and are significantly easier to manufacture and pave.  At the same time, they deliver excellent rutting properties, fatigue performance, and roadway durability.

Bitumen modified with PGXpand can also be used in hot spray seal applications on roadways, allowing for improved workability and better performance.  PGXpand Modified Emulsions are used for repair and maintenance applications in the paving industry to deliver long-term durability and reduce frequency of road repairs.

Sripath’s PGXpand has been tested, evaluated, and vetted by leading experts in academia, industry and transportation agencies from around the world. It has been trusted and effectively used on roadways across the globe since 2015.

For further information on PGXpand or other Sripath products, please visit www.Sripath.com.

Content produced in association with Sripath

For more information on companies in this article

Related Content

  • Choosing the right modified bitumen made easier
    February 10, 2012
    Choosing the correct high performance binder material for use in asphalt applications has been made easier following a product rebranding exercise by one company. Awareness among highway maintenance contractors of the benefits of selecting polymer modified bitumens when specifying road surfacing materials has risen markedly in the last few years.
    Read More
  • Innovative advances in warm Mix Asphalts
    February 1, 2013
    Rising energy costs and increased awareness of safety and environmental issues have encouraged the development of Warm Mix Asphalts (WMA), which are typically produced at temperatures of between 130°C and 145°C, compared with around 175°C for traditional Hot Mix Asphalt (HMA). WMAs are regularly used in many European countries, as well as both North and South America. The three most common ways to lower the working temperature of asphalt are: a) foaming technologies; b) wax additives; and c) chemical (surfa
    Read More
  • Asphalt plant innovations from key firms
    June 12, 2017
    Asphalt plant builders continue to develop new technologies to meet different demands from clients. Marini says that in addition to developing new and more sophisticated asphalt plants, the firm is also meeting demands from customers looking to upgrade existing asphalt plants with the addition of new systems. These can be used to boost output and material quality, while also delivering new grades of mixes. At the same time, plant upgrades can reduce the environmental profile of a plant, while improving its
    Read More
  • Durability is crucial while warm mix technology can help disaster recovery
    February 21, 2013
    Why durability is crucial for both emerging and developed economies, and how warm mix technology can help disaster recovery - Kristina Smith reports. When CORE Construction, a 100% owned Ghanaian company, started working on road construction projects five years ago, it was difficult to source the right bituminous mixes. “In the past, most construction firms had a number of challenges when it came to bituminous works, since the local capacity was not well-developed,” said CORE CEO Frank Lartey. CORE’s soluti
    Read More

Highlighted Content