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Mid-America Transportation Center

Sustainable Asphalt Pavements Using Bio-Binders from Bio-Fuel Waste

Final Report
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Researchers

  • Principal Investigator: Ken Klabunde (kenjk@k-state.edu 785-532-6668)
  • Co-Principal Investigator: Chris Williams (rwilliam@iastate.edu (515) 294-4419)
  • Project Status
    Complete
    About this Project
    Brief Project Description & Background
    Asphaltic binders that are used for asphalt pavements have been traditionally obtained either from fossil fuels or from natural sources. However, due to growing interest in sustainability, search has been initiated for a non-petroleum binder that could be used for asphalt pavements.This study will consist of three parts: (1) Identification of potential bio-fuel wastes; (2) Binder and mixture testing in the laboratory to find compatibility with paving asphalt and mixture performance; and (3) Accelerated Pavement Testing of pavements using potential bio-asphalts. The parts (1) and (2) will be addressed in this study. The third part will be done in a project that will be submitted to the Kansas Bio-Science Authority for funding.
    Research Objective
    The primary objective of this study is to develop a modified asphalt binder from the bio-refinery by-products and wastes that can be used as a replacement of the bituminous adhesives/binders derived from fossil fuels for asphalt pavements. The secondary objective is to develop a better binder that will have enhanced wetability and coating (adhesion) and resistance to aging (loss of volatiles) properties.
    Potential Benefits
    The study would result in a bio-binder for the paving industry. The research has the potential to develop a bio-based asphalt binder industry in Kansas. Since the binder will be from the bio-materials, these would qualify as "green" materials. Also, the project will have the solution or use for the wastes from the bio-fuel industry in Iowa, Kansas and elsewhere.
    Abstract
    Asphaltic binders that are used for asphalt pavements have been traditionally obtained either from fossil fuels or from natural sources. However, due to growing interest in sustainability, search has been initiated for a non-petroleum binder that could be used for asphalt pavements. The objective of this study is to develop a modified asphalt binder from bio-refinery by-products and wastes that can be used as a replacement of bituminous adhesives/binders derived from fossil fuels for asphalt pavements. The internal chemical structures of the residue from fossil fuel processing and biofuel processing are similar. Thus, necessary chemical changes would be minimal to produce the appropriate viscosity and aging index for use in asphalt mixtures. The bio binder properties will be modified using bio-polymers resulting in a better binder that will have enhanced wetability and coating (adhesion) and resistance to aging (loss of volatiles) properties.
    Project Amount
    $ 60,000