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Spotlight on Pavement Uniformity: Texas Department of Transportation – Abilene District Status and Next Steps With the Paver-Mounted Thermal Profiler (PMTP) For Asphalt Uniformity
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2023-08-01
[PDF-664.27 KB]
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Abstract:The Texas Department of Transportation (TxDOT) Abilene District has integrated paver-mounted thermal profiler (PMTP) imaging into its procedures to improve asphalt pavement quality during construction. PMTPs use temperature sensors to continuously read surface temperatures of the newly placed asphalt mat immediately behind a paver during placement operations. These readings can indicate temperature differentials, usually referred to as thermal segregation. This data can be converted into a visual representation of the temperatures on the roadway, via maps or graphs, that can be viewed in real time from the screed of the paver. An effective training program on thermal profiles has been crucial to successful PMTP implementation in the District, says Casey McGee, Abilene District Director of Construction. Training enables everyone to understand not only how to use the equipment, but how to interpret the data. "We're performing thermal scans every day on everything," McGee says. Training "gives field inspectors confidence in temporarily halting a paving operation if they see evidence of cold or inconsistent mat temperatures."
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