College - Author 1
College of Architecture and Environmental Design
Department - Author 1
Construction Management Department
Degree Name - Author 1
BS in Construction Management
Date
3-2026
Primary Advisor/Subject Matter Expert (SME)
Mark Montoya, College of Architecture and Environmental Design, Construction Management Department
Abstract/Summary
California’s highway infrastructure faces increasing material costs, limited aggregate availability, and aggressive greenhouse gas reduction mandates. Reclaimed Asphalt Pavement (RAP) offers a practical solution to reduce virgin binder demand and improve sustainability. However, Caltrans maintains conservative RAP limits due to concerns regarding stiffness related cracking and long term durability. This research evaluates the feasibility of increasing RAP content to approximately 40% when combined with Warm Mix Asphalt (WMA) technologies under California performance standards. A performance based framework was developed by reviewing federal guidance, peer-reviewed fatigue studies, life cycle cost analysis, and environmental assessment literature. Findings indicate that high RAP mixtures can achieve equivalent cracking resistance when softer binders or rejuvenators are used, and that WMA reduces short term aging and improves compaction. Economic modeling suggests potential material cost reductions of 12–20%, while environmental studies indicate measurable reductions in energy consumption and greenhouse gas emissions. Results support the conclusion that 40% RAP combined with WMA is technically feasible under a performance based specification framework aligned with Caltrans durability requirements.
URL: https://digitalcommons.calpoly.edu/cmsp/992
Poster Board