Current ICT Project
Investigators:
  Prof. Imad Al-Qadi (Primary), Prof. Sam Carpenter
Project Title:
  Thin Quiet Long-Lasting High Friction Surface Layer
Start Date: 7/1/2008
End Date: 6/30/2011
Summary of Project:
  Currently the cross section of a typical low volume non-interstate route overlay, in the state of Illinois, is 5/8-3/4in of leveling binder and a 1.25-1.5in surface course. To provide adequate friction, coarse aggregates having high friction are needed; however, such material requires to be hauled over long distances. On the other hand, for interstate highways, using stone mastic asphalt (SMA) becomes widely acceptable. However, while SMA performs well, it is sometimes cost prohibitive. Therefore, the intention of this study is to develop a new surface cross section that utilizes locally available aggregate materials as much as possible. This requires a fresh look at hot-mix asphalt (HMA) cross-section, including the job mix formulae of the composition layers, their engineering characteristics, and cost effectiveness. The surface layer is expected to be efficient and effective as to noise, durability, friction, and life cycle cost.
Objective of Project:
  The primary objective of this project is to develop a cost-effective mix profile for a new generation of surface layers and overlay cross-sections used in Illinois. In addition, this new surface layer is to be designed for better performance regarding to noise, durability, and friction, which provides more engineering benefits in terms of life cycle cost.
Expected Outcome:
  A wearing surface mix design which is durable and provides sufficient friction and possibly low noise.
Click here to check the status of this project.
Last Updated: 11/18/2009