Recently published: RAP and RAS in HMA Pilot Project on SBD 215: Material Testing, Observations, and Findings

UCPRC researchers recently published a technical memorandum summarizing a pilot project on State Route 215 in San Bernardino County that tested asphalt mixes with high levels of recycled material to evaluate their performance, durability, and construction quality. The study compared multiple recycled mixes to standard asphalt and documented how well they met key specifications and resisted cracking under real-world conditions. Several test sections were built using different percentages of reclaimed asphalt, while the rest of the roadway used a standard mix for comparison. Laboratory and construction testing showed that only the control mix and one recycled mix met certain performance specifications, although all mixes performed well in cracking resistance tests. The study documented how these recycled asphalt mixes behaved during production and construction, helping assess whether higher levels of recycled material can be safely used in future road projects without compromising quality or durability.

Keywords: reclaimed asphalt pavement (RAP), recycled asphalt shingles (RAS), hot mix asphalt (HMA), pilot project

Click here to read the full tech memo.

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