Asphalt shingle recyclers can generate revenue in the form of tippage fees to accept old shingles (typically less than at landfills), as well as through marketing activities to sell processed material. Markets for recycled asphalt shingles include existing early stage markets such as hot-mix asphalt and cold patch, as well as other emerging and potential markets.
Studies indicate that the use of a small percentage of recycled asphalt shingles in hot-mix asphalt helps improve the performance of pavement by reducing rutting and cracking. Because RAS substitutes for more expensive virgin asphalt cement and aggregate, it lowers the overall cost of hot-mix asphalt.
The growth of this application is anticipated as recycled content continues to be accepted by more states. Recycled asphalt shingles are currently authorized for hot-mix asphalt pavement in Minnesota, Wisconsin, Iowa, Texas, Missouri, Alabama, Georgia, South Carolina, Virginia, and New Hampshire. Many additional states allow the use of manufacturer’s scrap in hot-mix.
Recycled asphalt materials can also be used to fill potholes in road surfaces, where it is packed down by the weight of passing vehicles. This is a well established practice in Chicago, as well as New Jersey, Washington and California.
- Road Aggregate for Unpaved Roadways
Recycled asphalt shingles are also successfully used on unpaved roadways when ground and mixed with gravel before application. Tests indicate that this approach increases road durability, while reducing dust emissions, road noise and displacement of gravel from the roadway.
- Temporary Driveways or Roads
In such application, ground material is spread and then compacted to create temporary surfaces.
Studies have indicated that new shingles can be manufactured with up to 20% recycled content without impacting production, and while providing significant energy savings.
While the use of recycled shingles to create heat is an established market in Europe, concerns about pollution make this a less likely market in the U.S.
Source: Construction Materials Recycling Association