paving
As traffic volume grows and extreme weather conditions persist, the need for safer and more sustainable infrastructure solutions becomes increasingly urgent. Kraton is at the forefront of developing innovative bitumen modification technologies that enable the construction of cost-effective, durable roads. Our solutions improve road performance and longevity by enhancing resistance to rutting and cracking and reducing maintenance costs, construction delays, and traffic disruptions.
As a pioneer in bitumen modification, our products and global supply network allow us to consistently deliver superior performance, processability, and reliable supply.
Paving
SUSTAINABILITY BENEFITS
Environmental Protection
Our polymers are fully recyclable, and the pavement constructed with our solutions has a lower carbon footprint due to extended pavement life.
Economic Development
Our pavement solutions are easy to implement and require minimal maintenance, reducing the overall economic burden.
Social Impact
Roads are fundamental to a well-functioning society. Our solutions contribute to making roads better and safer.
Airports
It takes a particular pavement to withstand repeated airplane landings and takeoffs. Kraton technology solutions are used at over 60 airports internationally to make runways and taxiways last longer while maintaining smoothness, preventing traffic disruptions, and saving maintenance budget.
Case Studies
HIMA™ and Conventional PMB
SBS polymer-modified bitumens (PMB) provide asphalt pavements with enhanced mechanical and aging characteristics. When used appropriately, PMBs enhance the pavements’ economic and environmental value. Kraton offers a broad range of SBS polymers designed to work in even the most complex bitumen sources, providing the right balance of material properties.
Asphalt pavements flex under traffic, making it crucial for the bitumen to be strong and resilient. With their unique molecular structure, Kraton polymers enhance durability by adding flexibility, elasticity, and toughness to the bitumen mixture. This reduces sensitivity to extreme temperatures and improves performance properties across a wide temperature range.
HiMA and conventional PMB encompass polymer loading levels of 2-8 wt—% of SBS in bitumen. As the modification level increases, the bitumen resists high-temperature deformation and intermediate-temperature cracking. The effect depends on polymer content, type, and the formulation process.
Emulsions
Emulsions are developed using HiMA™ or PmB and adding water plus emulsifier. SBS is blended into the base asphalt before emulsification, as opposed to modification with water-based, latex polymer dispersions.
Kraton D grades are the most technologically advanced and user-friendly polymer options for manufacturing pre-modified asphalt emulsions.
Benefits
Enhanced Polymer Compatibility
- Improved compatibility in a wide range of base asphalts
- Low shear blending option
- Streamline formulations through a single polymer
Superior Liquid Emulsion Properties
- Excellent initial and long-term emulsion viscosity and storage stability
- Improved resistance to shear and pumping processes
- Optimal balance of break and set properties
- Can tune emulsion viscosity easily as a function of residue content
Lower Modified Asphalt Viscosity
- Leads to smaller particle size and narrower distribution
- Allows for emulsification on ambient pressure equipment
- Potential for improved performance through higher polymer loading
Improved Emulsion Paving Solutions
- Better chip retention
- Extended pavement system durability