Date of Award
Program or Major
Master of Science
Jo Sias Daniel
The Use of Reclaimed Asphalt Pavement (RAP) in Hot Mix Asphalt Mixtures (HMA) has become a regular practice in the United States. Nowadays, many State DOTs are comfortable using RAP contents up to 20%. However, the need to include higher percentages of RAP in mixtures is increasing due to the increase of virgin material prices. Concerns about low temperature cracking, fatigue cracking and the potential need to bump binder grades limit the amounts of RAP in HMA mixtures. Moisture damage is an issue in some regions as well. This study presents testing and analysis results of plant produced mixtures with different RAP contents up to 40%. Results showed that including high RAP content as well as using stiffer binders may decrease mixture compliance, increase dynamic and relaxation moduli. It also generally leads to relatively warmer cracking temperature, and better fatigue performance. For moisture damage, all mixtures have relatively acceptable resistance.
Elwardany, Michael D., "Performance of plant produced HMA mixtures with high RAP content in terms of low temperature cracking, fatigue cracking, and moisture induced damage" (2012). Master's Theses and Capstones. 735.