Study Shows Rubber-Modified Asphalt Cuts Emissions Compared to Virgin Modifiers

A life cycle assessment commissioned by US processor Liberty Tire Recycling has demonstrated that incorporating ground tire rubber into asphalt formulations significantly reduces greenhouse gas emissions compared with conventional virgin polymer modifiers.

As infrastructure projects face stricter environmental scrutiny, road builders and material specifiers are increasingly evaluating the embedded carbon of asphalt additives. Standard polymer-modified binders typically rely on virgin synthetic polymers such as styrene-butadiene-styrene (SBS), which carry high upstream carbon footprints due to energy-intensive petrochemical refining. The study highlights that substituting these virgin compounds with recycled elastomeric material delivers substantial carbon savings across the product life cycle.

For UK waste management companies and Turkish recycling operators, the study underscores the strategic necessity of robust, third-party Life Cycle Assessments (LCAs). As regulatory frameworks like the EU Corporate Sustainability Due Diligence Directive and UK sustainability disclosure standards require firms to report Scope 3 supply chain emissions, industrial buyers are seeking verified secondary inputs. Turkish recyclers exporting technical compounds or UK reprocessors refining post-consumer waste streams must increasingly present validated emissions data to compete against virgin polymers in high-value civil engineering and industrial applications.

The practical takeaway for recycling executives is clear: verified environmental metrics are becoming as decisive as technical specifications. Reprocessors should consider commissioning certified carbon footprint analyses for their secondary outputs to capitalise on growing demand from procurement teams targeting lower embodied carbon in infrastructure projects.

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Reported by Recycling Today — original article