December 9, 2025
Shingle Recycling Committee, chaired by Dan Horton of Asphalt Shingle Recycling Systems. The meeting focused on advancing asphalt shingle recycling practices, engaging state DOTs, and sharing research on innovative applications of recycled asphalt shingles (RAS).
The first presenter Eshan Dave, PhD (University of New Hampshire) and Fausto Bisanti (University of Parma/New Hampshire), presented on the Use of Recycled Asphalt Shingles in Full-Depth Reclamation (FDR). The goal of the project was to assess the feasibility of using RAS as a mechanical stabilizer in FDR processes, recommend dosages, and evaluate performance impacts.
- Methodology:
- Tested Vermont projects (US-2 Marshfield/Danville and VT-15 Cambridge/Johnson).
- Compared processed vs. minimally processed RAS at 5% and 10% dosages.
- Conducted mechanical tests (Indirect Tensile Strength, moisture sensitivity, shear strength) and environmental assessments.
- Findings:
- Optimal dosage: 5% RAS.
- Increased density improved mechanical properties.
- Minimally processed RAS performed better than fully processed RAS.
- Pavement life impact was minimal; moisture resistance improved.
- Lifecycle cost and environmental impact analysis underway; final report expected early spring. RAS can be effectively used in FDR applications at 5% dosage with minimal processing, offering cost and sustainability benefits. Industry collaboration is critical for developing best practices and LCA standards. Significant interest from DOTs and recyclers in pilot projects and knowledge sharing.
The second presentation was on our Lifecycle Assessment (LCA) Initiative Presented by: Vicki Rybl, WAP Sustainability
- Objective: Develop an industry-average LCA for recycled asphalt shingles to quantify carbon footprint and environmental impacts.
- Importance: Supports DOT sustainability goals, EPD generation, and market positioning for recyclers.
- Timeline: Data collection begins early 2026; results expected by October 2026.