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Recycling
Current Projects and Activities
- Asphalt Pavement Recycling with Reclaimed Asphalt Pavement (RAP)
- Use of Recycled Foundry Sand in the Cleveland Area
- Foundry Sand Facts for Civil Engineers Updated
- Fly Ash Facts for Highway Engineers
- Environmental stewardship practice at state Departments of Transportation (DOTs) has grown exponentially in recent years. NCHRP 25-25(04) presents a compendium of environmental stewardship practices in construction and maintenance, developed from the literature, state transportation agency manuals and procedures, and the contributions of state DOTs and practitioners. The best practices herein serve as a guide to the development of Environmental Management Systems and environmental strategic plans both on the organizational level and in specific functional areas. Practices can also serve as foundational elements for individual environmental guidance resources that DOTs may develop.
- Partnerships for Sustainability A New Approach to Highway Material - A Report on the Houston Workshop. The FHWA invited highway materials and environmental specialists from the individual State DOT's to meet at a workshop. Additionally, we invited state Departments of Environmental Protection specialists along with FHWA, the U.S. EPA, AASHTO, and American State and Territorial Solid Waste Management Officials. We mixed them together with some very important European recycling specialists for a workshop. This report covers that workshop.
- Cold In-place Recycling State of Practice Review. The purpose of this review is to capture information on best practices, good engineering advice, project selection criteria and construction control process for the using Cold In-place Recycling (CIR) to rehabilitation of our highways.
- Executive Summary of Findings
- Review Methodology & Questions
- Survey Output: From our AASHTO assisted survey we compiled the responses onto a spreadsheet to help analyze the responses and try to get an understanding of the technology, level of use, and what some of the states are doing for quality control, materials used, and design process. The spreadsheet is an indicator of what issues the states have, and comments on future use of needs. Caution, any survey has some flaws in the responses. So the information should only be an indicator of the status.
- US Map - Extent of Use
- Review Summaries
- Recycled Concrete Aggregate Federal Highway Administration National Review The purpose of this review is to capture for technical deployment the most advanced uses of recycled concrete aggregate and then transfer the knowledge with all State Transportation Agencies (STA).
- NIOSH Activities
- The User Guidelines for Waste and Byproduct Material in Pavement Construction
- Recycled Materials in European Highway Environments: Uses, Technologies, and Policies (PDF, 1.8 mb)
- NHI Course # 131050A - Asphalt Pavement Recycling Technologies - A joint effort between FHWA Recycling Team, Asphalt Recycling and Reclamation Association (ARRA), and National Center for Asphalt Technology (NCAT) has produced a noteworthy course that provides in-depth technical knowledge of several asphalt recycling technologies (in-place and plant). ARRA's "Basic Asphalt Recycling Manual" is used as a reference in this course. Course is ready for your agency's training program.
- NHI Course #131062/131063 - Portland Cement Concrete Pavement Evaluation and Rehabilitation (131062A) and Hot Mix Asphalt Pavement Evaluation and Rehabilitation (131063A) - Are the replacement for the FHWA's long time taught and highly requested Techniques for Pavement Rehab. That old course was often taught as either a PCC or HMA course, now the new course has been created to be two courses, newly revised technology has been included in the two courses.
- A good source of the extent of use of various recyclable materials is found in the 1994 FHWA report The Use of Recycled Materials in Highway Construction
- University of New Hampshire (UNH) in conjunction with University of Rhode Island (URI) has finished a study on CIR Design guide using the "Superpave Gyratory compactor". The report is titled: Cold In-place Recycling (CIR): Performance Based Mix Design. The study's main objective was to develop a performance based mix design for Cold In-place Recycling (CIR) for use by the SHA and Local Governments using the gyratory compactor.
Research and References
View all Recycling Publications
More recycling articles
Pavement Recycling Team
To facilitate the use of recycled materials in the highway environment, FHWA has created a new recycling team. The team is completing its business plan and developing a White Paper on recycling.
The team's role is to:
- Increase FHWA's and our partners' awareness of the existing recycling knowledge.
- Identify, foster, and promote research to develop or test new technology.
- Foster the review, evaluation, and advancement of emerging technology.
- Identify and help overcome barriers.
- Coordinate recycling activities within FHWA.
- Facilitate coordination and cooperation with State highway agencies, State environmental agencies, the U.S. Environmental Protection Agency, and industry.
For more information or for assistance, contact one of the team members listed below:
AASHTO Subcommittee on Materials Recycling Task Force Membership
Policy
FHWA recognize the need to increase our highway industry's overall use of recycled materials. There are several reasons to be pro-recycle:
- Cost savings potential
- life cycle cost and engineering performance
- Reduction in landfill
- Stewardship of our environment
FHWA's Recycling Policy has several key points:
- Recycling can offer engineering, economic and environmental benefits.
- Recycled materials should get first consideration in overall materials selection.
- Engineering and environmental properties are important.
- Life Cycle Cost benefits assessment is warranted.
- Restrictions prohibiting recycled material that are without technical basis should be removed.
The complete FHWA Recycled Materials Policy is available
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