United States Department of Transportation
i
Optimizing the Performance of Item 404-Low Volume Traffic Mixes [Fact Sheet]
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2023-03-01
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[PDF-263.00 KB]
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Abstract:This research project involved the following: • Online survey: An online survey was conducted in this study to document the current state-of-the-practice by Ohio LPAs regarding the use of 404LVT asphalt mix design specifications. • Laboratory study: A laboratory testing plan was designed and implemented in this study to examine the effects of various mix design factors – such as asphalt binder type, asphalt binder content, reclaimed asphalt pavement (RAP) content, coarse aggregate type, fine aggregate type, and aggregate source – on the performance and durability of 404LVT mixes. Balanced mix design concepts were utilized in evaluating the effect of different modifications to the 404LVT mix design. Several laboratory tests were used for this purpose, including the indirect tension asphalt cracking test, the modified Lottman test (AASHTO T 283), the Hamburg wheel tracking device, and the asphalt concrete cracking device. • Field condition evaluation: The research team evaluated the field condition of different pavement sections constructed using 404LVT mixes in Fayette County, Darke County, and Miami County in order to identify the most common types of distresses encountered for 404LVT mixes in the field. The pavement condition evaluations were supplemented with information about the 404LVT mix designs used in construction and traffic information for the different pavement sections.
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