Skip Navigation

Mid-America Transportation Center

NDOR Implementation of Warm-Mix Asphalt (WMA) Mixtures in Nebraska Pavements

Final Report
click to download report


Researchers

  • Principal Investigator: Yong Rak Kim (ykim3@unl.edu (402)472-1727)
  • Project Status
    Complete
    Sponsors & Partners
  • Nebraska Department of Roads
  • About this Project
    Brief Project Description & Background
    Warm-mix asphalt (WMA) was introduced in the United States from Europe. WMA has the potential to allow the producers of hot-mix asphalt (HMA) pavement material to lower the temperatures at which the material is mixed and placed on the road. Such drastic reductions would have the obvious benefits of cutting fuel consumption and decreasing the production of greenhouse gases. In addition, researchers have shown that lowering the production temperature can drastically reduce the production of emissions, which leads to better conditions for workers in paving field. The primary objective of this research is to perform various key tests, which are expected to provide essential information of mechanical property-performance of WMA mixtures implemented in Nebraska.
    Research Objective
    The primary objective of this research is to perform various key tests, which are expected to provide essential information of mechanical property-performance of WMA mixtures implemented in Nebraska.
    Potential Benefits
    The results of this research could result in wider implementation of WMA in Nebraska, the use of which cuts fuel consumption and reduces emissions in the field, compared to HMA, creating better conditions for workers and reducing greenhouse gasses.
    Abstract
    The objective of this research is to evaluate the feasibility of several WMA mixtures as potential asphalt paving mixtures for Nebraska pavements. To that end, three well-known WMA additives (i.e., Sasobit, Evotherm, and Advera synthetic zeolite) are evaluated. For a more realistic evaluation of the WMA approaches, trial pavement sections of the WMA mixtures and their HMA counterparts will be implemented in Antelope County, Nebraska. More than one ton of field-mixed loose mixtures will be collected at the time of paving and was transported to the NDOR and UNL laboratories to conduct comprehensive laboratory evaluations and pavement performance predictions of the individual mixtures involved. Various key laboratory tests will be conducted to identify mixture properties and performance characteristics. These laboratory test results will then be incorporated into other available data and the MEPDG software to predict the long-term field performance of the WMA and HMA trial sections. Pavement performance predictions from the MEPDG will bealso compared to two-year actual field performance data that have annually been monitored by the NDOR pavement management team.
    Project Amount
    $ 99398