United States Department of Transportation
i
Evaluating the Structural Properties and Cost-Effectiveness of Graphene-Modified Asphalt
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2024-05-01
[PDF-881.29 KB]
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Edition:Final Report
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Abstract:Graphene oxide (GO) is a nanoscale material created from graphite. GO has the potential to increase the service life of asphalt binders and asphalt mixtures, but there are concerns about the high cost of GO. The objective of this study is to provide the cost benefit of using GO in neat and SBS modified asphalt binders for a simulated asphalt pavement construction project with estimated long-term engineering performance in Colorado. To accomplish this objective, the asphalt binders with different GO dosages were subjected to a series of laboratory tests to determine the material properties. The results of the lab tests were input into the AASHTOWare Pavement ME software with representative pavement sections to determine pavement design life. The design life, rehabilitation schedule, and cost for the control and the GO binder were evaluated through a life cycle cost analysis. When considering the rutting performance of the pavement, the LCCA results indicated that the current costs of using GO in a neat binder are competitive with a conventional neat binder, while the current costs of using GO in a SBS modified binder are much higher than a conventional SBS modified binder.
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