Turn PFAS-Impacted Asphalt & Concrete into a Valuable Resource
RemRAP™ is a patented treatment process designed to help organizations manage PFAS-impacted Recycled Asphalt Pavement (RAP) and other granular materials while supporting beneficial reuse opportunities. Instead of stockpiling or disposing of impacted material, RemRAP helps immobilize PFAS within the recycled material so it can be incorporated into new infrastructure projects.
RemRAP combines specialized sorbent technology with foamed bitumen construction methods to reduce PFAS leaching potential, support circular material use, and minimize reliance on virgin aggregate resources.
PFAS and Recycled Asphalt Challenges
Across the world, PFAS-impacted asphalt and construction materials are frequently stockpiled while organizations evaluate management options. Materials that were once considered highly recyclable can become difficult and expensive to manage when PFAS concerns enter the equation.
Traditional approaches often lead to long-term stockpiling, transportation, disposal costs, and increased demand for virgin materials. RemRAP was developed to provide an alternative approach focused on immobilizing PFAS within recycled asphalt materials while supporting continued beneficial use.
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What Is RemRAP™?
RemRAP is a patented treatment process developed through a collaboration between RemBind and Fulton Hogan that combines PFAS immobilization technology with asphalt construction practices. The process is designed for use with recycled asphalt pavement and other granular materials impacted by PFAS contamination.
The technology uses specialized sorbent blends and foamed bitumen processes to help manage PFAS risks while maximizing the reuse potential of recycled materials.
Rather than treating PFAS as a disposal problem, RemRAP is intended to support a circular approach where materials remain in productive use.
How RemRAP™ Works
Step 1: Treat PFAS-Impacted RAP
PFAS-impacted recycled asphalt pavement is combined with RemRAP treatment materials designed to immobilize contaminants.
Step 2: Encapsulate Within Foamed Bitumen
The treated material is incorporated into a foamed bitumen process. The bitumen helps retain the treatment system within the recycled material while providing additional water resistance and PFAS management benefits.
Step 3: Incorporate into Pavement Construction
The resulting foamed bitumen base is installed beneath a low-permeability wearing course that further protects the treated material and limits environmental exposure.
Step 4: Support Long-Term Material Reuse
The treated material remains part of an active infrastructure asset rather than becoming a disposal liability. At the end of service life, material may be recovered and incorporated into future projects.
Key Benefits
Reduce PFAS Leaching Potential
The patented treatment process is designed to immobilize PFAS and support management of potential leaching risks.
Support Beneficial Reuse
Enables reuse of PFAS-impacted RAP and other construction materials that might otherwise require disposal or long-term storage.
Reduce Demand for Virgin Materials
Supports incorporation of recycled materials into new infrastructure projects.
Advance Sustainability Objectives
Supports lower-carbon construction strategies and circular economy principles through material reuse.
Minimize Disposal Costs
Can reduce stockpiling requirements and long-term disposal expenses associated with PFAS-impacted materials.
Weather-Tolerant Delivery
The cold-process approach supports efficient installation and project delivery.
Applications
Airport Runways and Taxiways
Manage PFAS-impacted recycled asphalt generated during airport maintenance and reconstruction activities.
Military Installations
Support reuse of construction materials at facilities affected by PFAS contamination concerns.
Roads and Highways
Incorporate treated RAP into transportation infrastructure projects while supporting reuse objectives.
Municipal Infrastructure
Assist municipalities in managing PFAS-impacted construction materials and redevelopment projects.
Industrial Redevelopment
Support beneficial reuse strategies during reconstruction and site redevelopment programs.
PFAS-Impacted RAP Can Be Reused, Recovered and Reapplied
Research and Development
Bench-scale testing conducted in collaboration with RemBind and Fulton Hogan evaluated RemRAP as a PFAS immobilization system for recycled asphalt pavement. The research demonstrated substantial reductions in PFAS leachability while maintaining the functional characteristics necessary for infrastructure applications.
Laboratory testing reported PFAS removal efficiencies ranging from approximately 97% to greater than 99% during various testing phases, while candidate formulations demonstrated immobilization performance exceeding binder-only controls.
Why Carus
Carus helps customers address complex environmental and infrastructure challenges through practical, science-based solutions.
Through our relationship with RemBind, organizations in the United States gain access to innovative technologies designed to support PFAS management, beneficial reuse, and sustainable infrastructure development.
Whether evaluating PFAS-impacted recycled asphalt pavement, planning material reuse strategies, or exploring alternatives to disposal, Carus can help.
Resources
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Ready to Discuss Your Project?
Whether you are evaluating PFAS-impacted recycled asphalt pavement, planning material reuse strategies, or exploring alternatives to disposal, Carus can help. Contact Carus to learn more about RemRAP™ and discuss your project requirements.