Use of Radio Frequency Identification (RFID) Tags in Hot Mix Asphalt
Inexpensive expendable radio frequency identification (RFID) technology will be used to spatially locate shipments of hot mix asphalt concrete during pavement construction. Compact RFID sensors no larger than the largest aggregate size in the asphalt mixture will be hardened to survive the high temperatures and stresses of asphalt production and placement. These expendable tags will be placed in a truckload of asphalt as it leaves the production plant and then pass through the paver and be compacted into the finished mat. Cross-referencing these tags with GPS latitude and longitude coordinates after construction will enable material property data measured at the production plant to be spatially referenced and linked to other spatially referenced in-place test results and pavement performance data. This leveraging of large data sets already collected by highway agencies will permit more robust analyses and insights into the relationships between asphalt material properties and actual pavement performance.