Target Completion Date: January 31, 2014 Structures
Some highway maintenance spending has shifted from traditional-thickness, plant-produced asphalt concrete to thin surface treatments, such as slurry seals, chip seals and plant produced thin asphalt concrete overlays. This reflects the current focus on preserving existing roads to get a longer life from the surface mixes This study will assess thin asphalt concrete wearing courses using a model mobile load simulator. It is part of a broader VDOT program to compare and catalog the expected performance of thin wearing course alternatives The load simulator – a scaled accelerated trafficking machine – will apply realistic rolling-wheel contact stresses to several thin pavement preservation treatments. Testing will focus on preservation treatments that are an inch thick or less. They initially will be limited to experimental fine, dense-graded surface mixes (4.75-millimeter nominal maximum aggregate). Laboratory and field-scaled accelerated pavement testing will provide quantitative performance data. Stability (rutting),fatigue and durability will also be addressed.
Last updated: July 5, 2023
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