Advancing Sustainability and Innovation in Cold In-Place Asphalt Recycling

Abstract: Cold In-Place Asphalt Recycling (CIR) is an often misunderstood and under-utilized pavement rehabilitation technique that offers a sustainable and cost-effective alternative to conventional road reconstruction methods. When correctly applied to projects with suitable pavement conditions, CIR can significantly reduce the environmental impact of road maintenance and extend the lifespan of existing infrastructure. Despite its benefits, CIR remains under-represented in the industry, largely due to misconceptions and a lack of widespread understanding.

The recycling industry is currently advancing the development of an Environmental Product Declaration (EPD) for CIR, which will provide a standardized measure of its environmental benefits. In parallel, efforts are underway to explore the potential for Carbon Credits derived from CIR processes, further enhancing its appeal as a green technology. These developments, along with the broader implications for sustainable infrastructure, will be a key focus of this presentation.

This presentation will also offer a detailed exploration of the CIR process, including project selection criteria, mix design considerations, construction techniques, and quality control measures. Additionally, recent innovations and research findings from the National Center for Asphalt Technology (NCAT) and MnROAD test tracks will be highlighted, demonstrating the improved performance and material properties of cold mixes. The flexibility of the CIR process allows for the integration of alternative binder technologies, with updates on current asphalt binder replacement initiatives to be discussed. Attendees will gain access to valuable resources, both in print and online, for further learning and implementation of CIR in future projects.