Current ICT Project
Investigators:
  Prof. Samuel H. Carpenter (Primary), Prof. Imad Al-Qadi
Project Title:
  Impact of High RAP Content on Pavement Structural Performance
Start Date: 7/1/2008
End Date: 6/30/2010
Summary of Project:
  The performance properties of high RAP mixtures need to be investigated for their impact on pavement performance characteristics (McDaniel NCHRP 9-21 Report). The structural and durability properties will be determined for varying RAP percentages to illustrate any detrimental effect of high RAP percentages and/or varied binder grades. The test results will be used to re-evaluate current recommendations on limited percentages of RAP and binder grade recommendations.
Objective of Project:
  Agencies in Illinois are attempting to use up to 50% RAP in HMA to realize an economic savings. Any structural behavior and durability differences from a standard IDOT HMA resulting from the recycling operation have not been addressed. This project will examine the effect of high RAP contents on mixture structural and durability properties.
Expected Outcome:
  Literature review, final report with recommendations on RAP percentages and performance changes, and level of blending.
Click here to check the status of this project.
Last Updated: 11/18/2009