Using Infrared and High-Speed Ground-Penetrating Radar for Uniformity Measurements on New Hot Mix Asphalt (HMA) Layers
Rapid Technologies to Enhance Quality Control on Asphalt Pavements (R06C)
Obtaining adequate in-place density is vital to achieving pavement durability for HMA pavement. Localized non-uniform zones of mix, termed segregation, often become low-density areas in the mat, having a significant adverse impact on pavement service life.
Infrared (IR) imaging and ground-penetrating radar (GPR) are two real-time technologies that potentially can be used to identify in-place density during construction operations. IR and GPR can test nearly 100 percent of the pavement area and provide immediate feedback to work crews. These nondestructive techniques may result in longer-lived pavements and allow agencies to stretch funding. During construction of an HMA pavement, IR techniques are able to evaluate its temperature which is critical for avoiding areas of asphalt segregation. GPR can potentially be used on the final mat after compaction.
This project is currently transitioning from research to proof of concept via the Round 4 Implementation Assistance Program. A full product page will be available early in 2014.
Additional information about this research project is available on the Transportation Research Board’s website.