Assistant Researcher
University of California Pavement Research Center
Sacramento, California, United States
Dr. Stephanus Louw has over 10 years of academia and research experience with full‐depth recycling
(FDR), partial‐depth recycling (PDR) and cold central plant recycling (CCPR), collectively termed cold
recycling. He has extensive experience in pavement design, mix design, construction, forensic
investigation, modeling, instrumentation, field testing, laboratory testing, and acceleration pavement
testing (APT) of in‐place recycled materials. Dr. Louw has served as the project engineer on multiple
projects for local and state departments, which includes different APT projects where cold recycled layers
were tested, laboratory testing of cold recycled materials, and field evaluations of projects with cold
recycled layers. He led a project to investigate microcracking in FDR stabilized with cement and has been
involved in projects to update the mechanistic‐empirical design software used in California (CalME) with
cold recycled material parameters. As a graduate student, Dr. Louw managed the falling weight
deflectometer operations for cold recycled material testing at the UCPRC, including the associated field
investigations and evaluations. He has published on APT and laboratory testing methods of cold recycled
materials, and was involved in writing the guidelines for in‐place and cold central plant recycling for the
California Department of Transportation (Caltrans). Dr. Louw is a member of the expert task group in
California that prepares and updates mix design procedures and specifications for cold recycled materials.
He was involved in the NCHRP 9‐62 project tasked with the development of the tool for rapid quality
Disclosure information not submitted.
Life Cycle Cost and Environmental Assessment of the Consequences of the Recycling Depth Restrictions
Tuesday, June 10, 2025
4:45 PM – 6:00 PM MT