Mapping Asphalt Density with GPR Arrays

Several technical innovations in asphalt pavement density mapping have been combined in a way that may significantly extend road life. Owners and contractors will now have the data necessary to accurately and immediately control their asphalt placement process. Field trial results show that more stable antenna performance, more accurate calibration methods and high-resolution mapping combine to give contractors the real-time information they have long needed to fix density problems that inevitably occur during placement. Being able to fix the problem immediately avoids the cost and future maintenance needed to rip up and replace deficient sections.