Data Analysis of Nebraska Pavements Containing RAP

Background For the last about 10 years, Nebraska has used reclaimed asphalt pavement (RAP) materials in mixes at approximately 20-40% to produce asphalt concrete (AC) mixtures for flexible pavements. The expanded use of RAP materials in the production of AC mixtures brought significant economic benefits and environmental advantages through the reduction of material costs and environmental impacts associated with production, transportation, and processing of the conventional asphalt materials. It has been reported that about $30-50 millions were saved annually due to the use of RAP materials. This infers that more use of RAP materials in the mixes is favorable to reducing costs and environmental impacts. Despite the immediate cost saving and environmental benefits attributed to the use of RAP, it has also been reported that using a higher percentage of RAP may reduce the resistance of asphalt mixtures to cracking and durability. This in turn, can result in reduced pavement lifespan and/or earlier needs of maintenance (or rehabilitation) . As a result, to avoid misleading practices in the use of RAP, a more rational approach that can evaluate the true economic benefits of using RAP materials in pavements should be pursued, and the approach needs to take into account not only the initial costs associated with materials and production, but also later-stage costs related to in-service performance of pavements. Objective This project aims to conduct a comprehensive data analysis of Nebraska pavements containing RAP materials. Toward that end, the research team and NDOT engineers will work together to select pavement sections in service for the last 5-10 years. A complete set of data will be collected and used to perform data analyses. If needed, further examination will be conducted through laboratory testing of samples cored from the field sections and numerical simulation of relevant mixtures and pavement structures. The data analysis will include typical statistical evaluation as well as the life cycle cost analysis, so that the practices for the last 10 years with RAP can be reviewed and improved for future projects.

    Language

    • English

    Project

    • Status: Active
    • Funding: $ $52,957.00
    • Sponsor Organizations:

      Nebraska Department of Transportation

      1500 Nebraska 2
      Lincoln, NE  United States  68502
    • Project Managers:

      Halsey, Lieska

    • Performing Organizations:

      University of Nebraska, Lincoln

      1400 R Street
      Lincoln, NE  United States  68588
    • Principal Investigators:

      Kim, Yong-Rak

    • Start Date: 20190701
    • Expected Completion Date: 20201231
    • Actual Completion Date: 0
    • USDOT Program: Transportation, Planning, Research, and Development

    Subject/Index Terms

    Filing Info

    • Accession Number: 01705868
    • Record Type: Research project
    • Source Agency: Nebraska Department of Transportation
    • Files: RiP, STATEDOT
    • Created Date: May 24 2019 2:09PM