PAVEMENT MIX DESIGN STUDY FOR VERY HEAVY GEAR LOADS; PILOT TEST SECTION.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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A pilot test section was constructed and subjected to accelerated traffic tests in which traffic simulated B-52 aircraft and heavier loads. Primary objective was to obtain information on the effects of amount and type of asphalt and aggregate graduation on the performance of asphalt pavements subjected to very heavy gear loads and high tire pressures. The test section comprised 19 main test items i.e. portions containing various aggregate graduations, asphalt contents, and types of asphalt. All items were 4 in. thick. Test pits permitted CBR, density, and water-content determinations. Laboratory tests were performed on pavement samples to determine voids data, stability, and flow. Pavement deflections and permanent deformation were measured at the pavement surface and in test trenches, and pictorial evidence of the condition of the test section at various intervals of traffic was obtained. This report describes the design, construction, and testing of the test section, presents conclusions derived therefrom, and makes recommendations for the design of paving mixtures for use in pavements subjected to B-52 traffic. Author
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