Typical and darkened Portland cement concrete pavement: temperature, moisture, and roughness analyses : final report.
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2017-01-01
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Alternative Title:Typical and darkened Portland cement concrete pavement: temperature, moisture, and roughness analyses.
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Abstract:The objectives of this research were to 1) investigate the effects of lower concrete albedo on the thermal behavior of concrete pavement by directly comparing temperatures and moisture contents of typical and darkened concrete pavements and 2) investigate changes in roughness of both typical and darkened concrete pavements as a result of changes in temperature and moisture gradients. The scope of the research included instrumentation, testing, and analysis of typical and darkened concrete pavements constructed in northern Utah. Procedures related to field testing included elevation surveys, albedo measurements, infrared thermography, thermocouple readings, sensor data collection, and roughness surveys. Procedures related to laboratory testing included elastic modulus, compressive strength, rapid chloride permeability, thermal conductivity, and Schmidt rebound hammer testing of cylinders prepared from typical and darkened concrete. The results suggest that darkened concrete pavement is unlikely to melt snow and ice faster than typical concrete pavement or provide significantly greater frost protection to subsurface layers and buried utilities during winter for conditions similar to those in this research. The data also suggest that the roughness of the typical concrete pavement evaluated in this research was 1.4 and 2.1 times more sensitive to changes in temperature and moisture gradient, respectively, than the darkened concrete pavement.
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