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Industrial Materials Recycling
Industrial materials recycling, also referred to as beneficial use, means reusing or recycling the byproduct materials generated from industrial processes. These materials can be used as substitutions for raw materials in the construction of buildings, transportation, and water infrastructure, as well as used for manufactured soils and soil amendments.
EPA is focusing on promoting and increasing the safe beneficial use of coal combustion products (CCPs), foundry sands, and construction and demolition (C&D) materials, as well as other materials such as scrap tires, slags, and pulp and paper byproducts. Putting these commodities into productive use preserves natural resources, saves energy, conserves landfill space, reduces greenhouse gas emissions and contributes to a sustainable future.
Asphalt Shingle Recycling and Reuse Initiative in Colorado
The Boulder County Resource Conservation Division, Roofs to Roads Colorado, the asphalt industry, state and city transportation officials, and other stakeholders are working on developing an infrastructure for recycled asphalt shingles (RAS) in roadway paving projects to create durable roads, conserve natural resources, reduce solid waste and greenhouse gas emissions, and reduce costs for paving materials.
Environmental Benefits from Recycling Asphalt Shingles in Pavement Mixes
EPA Region 8 has developed a life cycle based assessment to support the ongoing efforts to establish a shingle recycling market infrastructure in Colorado, and more broadly, the region. The goal of the analysis was to compare limited environmental inventory and impacts of seven asphalt mixes with various percentages of reclaimed asphalt and recycled shingles to a baseline of virgin asphalt. The study is an initial, limited life cycle inventory and impact assessment that examines avoided landfill impacts, greenhouse gas emissions/global warming potential, and criteria and other air pollutants on a cradle-to-gate basis. Energy consumption and resource depletion are considered only for select stages in the life cycle. The study was developed, where possible, using regional characterization factors such as mix designs and material and product transport distances.
Colorado Department of Transportation (CDOT) Sustainability Program
CDOT conducted a study and completed a review of roadway projects where alternative materials, such as asphalt, concrete, wood, metal, and scrap tires, have been successfully used in Colorado and nationwide. Results of the study provide a knowledge base for CDOT and other construction engineers, recommend specification changes to accommodate the reuse of solid waste materials, and promote flexibility in materials reuse for roadway projects.
Final Project Report: Materials Recycling and Reuse - Finding Opportunities in Colorado Highways, October 2007
National and Regional Performance Standard Specifications and Guidelines for Industrial Materials
EPA Region 8 has assembled national and regional performance standard specifications and guidelines for industrial materials in roadway applications. Standard specifications provide direction, provisions, and requirements pertaining to performance of construction work. The standard specifications and guidelines can be used as references for the types of industrial materials that are allowed to be reused and recycled in various construction projects or applications in each state.
Summary of Coal Combustion Product (CCP) Regulations and Specifications for Four EPA Region 8 States
Current regulations, standards, and practices related to the use of fly ash for soil stabilization applications were reviewed in Montana, North Dakota, South Dakota and Wyoming by the University of North Dakota's Energy & Environmental Research Center as part of an EPA grant. The report presents existing department of transportation (DOT) engineering specifications as they pertain to the use of CCPs, and the environmental statutes and regulations for each state as they pertain to utilization, handling and disposal of CCPs.
Kendra Morrison (firstname.lastname@example.org)
U.S. EPA, Region 8
Solid & Hazardous Waste Program
1595 Wynkoop Street (8P-HW)
Denver, Colorado 80202
Each Region 8 state evaluates the reuse/recycling of industrial materials on a case-by-case basis. Please contact your respective state solid waste or recycling program for the application process to obtain a determination/approval for your project.
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