High-performance stone mastic asphalt.
SteelFlex™ is designed with steel slag aggregate and high-performance Polymer Modified Binder (PMB) contributing to sustainable, durable, and environmentally friendly road construction.
Proven performance
Steel slag enhances the mechanical properties of asphalt mixtures, and when combined with high-performing PMB, additional performance enhancements are demonstrated in the material's performance.
Performance statistics
High skid resistance, crack and deformation resisting are all proven from the Research & Development stage to performance monitoring.
SteelFlex SAMI
SteelFlex Stress Absorbing Membrane Interlayer (SAMI) is a sustainable solution for crack prevention, waterproofing, stress absorption and enhanced durability.
A versatile solution that can be used in applications such as concrete-based highways, car parks and industrial estates as well as an alternative to geogrid.
SteelPhalt products in action
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Application Opportunity
The A4161, Castle Street, in Cardiff, was originally laid on concrete. Due to high traffic volume, the surface layer needed replacing due to showing signs of fatigue.
Recommended Product
10mm SteelFlex, made with 95% recycled steel slag aggregates, was recommended for this project as it has a high resistance to reflective cracking.
Results and Benefits
In 2022, 1000 tonnes of material was installed and is still performing to high-performance standards. The carbon footprint was reduced by 20 kg CO2e per tonne of asphalt.
