About this program

The Asphalt Materials & Pavements Program is a program of the Institute for Transportation at Iowa State University.

Related links

Program Manager Chris Willliams's research projects

Apply for the AMPP Summer Internship Program


Institute for Transportation

2711 S. Loop Drive, Suite 4700
Ames, IA 50010-8664

Phone: 515-294-8103
FAX: 515-294-0467

Website: www.intrans.iastate.edu/


Sponsored Projects

Several current projects explore environmentally sustainable ways of making asphalt:

  • Evaluating lignin from agricultural co-products as an antioxidant in asphalt
  • Using recycled shingles in asphalt mixes
  • Evaluating warm-mix asphalt made in Iowa
  • Evaluation of Lignin/Phenol Derived from Bio-oil Production for use as an Antioxidant in Asphalt

Other projects involve testing, quality control, and non-destructive evaluation:

  • Early Permeability Test for Asphalt Acceptance
  • Investigation of Electromagnetic Gauges for Determination of In-Place Density of HMA Pavements
  • Evaluation of Hot Mix Asphalt Moisture Sensitivity Using the Nottingham Asphalt Test Equipment
  • Testing Iowa Asphalt Mixtures for the AASHTO Mechanistic-Empirical Pavement Design Procedure
An asphalt trail being placed.

An asphalt trail being placed.

Sharing research results

The group assists the Iowa DOT through forensic evaluation of materials. They attend conferences and have disseminated research results locally, regionally, nationally, and internationally in Canada, France, China, Greece, and the Netherlands.


The asphalt program has partnered with the following agencies, industry, and universities:

  • Center for Sustainable Environmental Technology
  • Bioeconomy Institute
  • Grain Processing Corporation
  • SEM Materials
  • Iowa Highway Research Board
  • Federal Highway Administration
  • Asphalt Paving Association of Iowa
  • National Asphalt Paving Association
  • National Roofing Contract Association
  • Asphalt Roofing Manufacturers Association


Asphalt researchers provided 10 undergraduate scholarships in 2007. They’re working on getting an undergraduate asphalt concentration in the civil engineering curriculum at Iowa State University. Four graduate students are supported on research projects.

“The greatest long-term return is producing high-quality people in asphalt with technical, business, and leadership skills,” says Chris Williams, leader of the program.

Contact us

Chris Williams, program manager, 515-294-4419, rwilliam@iastate.edu