United States Department of Transportation
i
Optimizing the Performance of Item 404-Low Volume Traffic Mixes
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2023-03-01
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[PDF-5.05 MB]
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Edition:Final Report
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Abstract:Most local public agencies (LPAs) in Ohio follow the Ohio Department of Transportation (ODOT) specifications for designing asphalt mixtures placed on low‐volume roads, with the majority of these agencies using Type 1 surface mixes prepared using PG 64‐22 asphalt binders. As an alternative, some LPAs use a mix known as 404LVT, which is a fine-graded recipe mix that is rich in asphalt binder and can be placed at a thickness of 1 inch to correct minor surface distresses. The main goal of this study was to optimize the 2015 404LVT specifications developed by Flexible Pavements of Ohio (FPO) for use by LPAs in Ohio on low-volume local roads. To achieve this objective, information was collected about the current state-of-the-practice for using 404LVT mixes in Ohio. In addition, a laboratory testing plan was designed and executed using materials collected from different asphalt plants across Ohio. This research project also involved evaluating the field condition of pavement sections constructed using 404LVT mixes. Based on the outcome of the laboratory test plan and the pavement condition evaluations, several recommendations were made to improve the performance of 404LVT mixes. In addition, recommendations were made to modify the 404LVT specifications in order to make the mix more cost-effective without compromising its performance.
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