Advanced Mix Design (WMA, RAP, RAS)

Milling machine loads recycled asphalt into dump truck while workers overlook process


Click here for current dates, fees, and to register and pay online.


The use of warm mix asphalt (WMA), reclaimed asphalt pavement (RAP), and recycled asphalt shingles (RAS) has significantly increased in recent years as a result of construction costs and environmental issues. This course is designed to provide information useful for designing mixes and making decisions about the use of WMA, RAP, and RAS. Information will be provided on testing, performance, and cost for each of these processes. This course is very useful for individuals involved in the HMA industry, including material producers, contractors, consultants, and various agency personnel.

Goals and Objectives

The purpose of this three-day workshop is to provide a basic understanding of the advantages of using WMA, high RAP, and RAS, and to provide guidance in material testing and mix design.

Program Content

This course consists of three days of intensive lectures, laboratory demonstrations, and hands-on training with these products in the laboratory. There will also be an optional tour of the NCAT Pavement Test Track to observe the performance of test sections using these materials. A brief outline of the course follows.


  • - Overview and discussion of WMA technologies
  • - Sources and control of RAP and RAS
  • - RAP/RAS properties
  • - Mix design procedures
  • - Performance tests: discussion of procedures
  • - Production and placement of WMA/RAP/RAS
  • - Guidance for field quality control/quality assurance
  • - Observed performance of high RAP/RAS mixes
  • - Observed performance of WMA mixes
  • - Class exercise: economics of WMA/RAP/RAS
  • - Proposed guide specifications for high RAP, WMA, etc.
  • - Status of implementation and open discussion

Laboratory and Test Track:

  • - Handling various WMA technologies: foaming, chemical, organic
  • - Performance test: observe performance test equipment and operation in the lab
  • - Material testing and mix design
  • - Tour of test track


Each participant will be provided a binder containing a print-out and electronic copy of the PowerPoint presentations.

Fees, Refunds, & Deadline

The registration fee of $1,200 includes the training program, course materials, and breaks. Costs for housing, food and transportation are the responsibility of each participant. Prepayment and registration can be submitted separately, but both must be received no later than ten days prior to the start date of the course. If payment is not received by that time, the participant will be removed from the registration list. Cancellations received at least ten days prior to the course start date will result in a full refund. No refunds will be provided for course cancellations after that date; however, substitutions will be accepted.

Continuing Education Credits

The course will provide 2.4 CEUs or 24 Professional Development Hours.


This course will be located at NCAT's main research facility in Auburn, Alabama. To obtain more information on this course, please contact Stacie Hunter.