Current Projects and Activities
- 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
- Asphalt Pavement Recycling with Reclaimed Asphalt Pavement (RAP)
- 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
- 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.
- Fly Ash Facts for Highway Engineers
- Foundry Sand Facts for Civil Engineers Updated
- 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.
- NIOSH Activities
- 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.
- 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).
- Recycled Materials in European Highway Environments: Uses, Technologies, and Policies (PDF, 1.8 mb)
- 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.
- Use of Recycled Foundry Sand in the Cleveland Area
- User Guidelines for Byproduct and Secondary Use Materials in Pavement Construction - Guidance document to help reader in using or increasing their understanding of the types of byproducts and secondary use materials that can be recovered and used in pavement construction applications