Sustainability, cost efficiency and longevity are key requirements for modern transport infrastructure. In a groundbreaking pilot project with the company Max Bögl, CTS demnonstrates that rubber-modified bitumen — more specifically, the product GRM (Granulate Rubber Modified) by CTS — sets new standards in road construction.
The rubber-modified bitumen used in this project significantly improves the physical properties of asphalt.
The advantages:
Based on over 40 years of experience and more than 19.8 million m² of realized road surfaces, the following performance increases are achieved:
In 2011, a 140,000 m² section of the A6 was paved with PA 8 and GRM-modified binder – all under live traffic. The project was part of a performance-based contract with guaranteed service life and a bonus clause. CTS covered the additional cost of GRM compared to PmB – a strong commitment to the performance of its own product.
Results after 13 years:
Thanks to the significantly extended service life, GRM dramatically reduces the frequency of maintenance compared to polymer-modified bitumen (PmB). Over a 25-year period, PmB typically requires several maintenance interventions, while GRM generally only needs one.
According to the life cycle assessment by Umtec Technologie AG (2021), this project achieved around 11,600 tons of CO₂ savings. The study confirms that GRM is significantly more eco-friendly than PmB at both the binder and asphalt levels – across all asphalt layers.
GRM by CTS not only meets the requirements of TL RMB-STBby, but in many cases exceeds the performance of conventional PmB binders. The technology is:
Interested in GRM for your project?
Get in touch – we’ll be happy to advise you on application, specifications, and technical details!
