United States Department of Transportation
i
Compaction of asphaltic concrete pavement with high intensity pneumatic roller : part II : densification due to traffic.
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1965-10-01
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By Shah, S. C.
[PDF-817.41 KB]
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Abstract:In the early of 1961 a research project was undertaken by the Louisiana Department of Highways in cooperation with the Bureau of Public Roads to study the effect of high intensity pneumatic rollers on the density of asphaltic concrete pavement using different compactive efforts and number of passes. This had resulted from a traffic survey conducted during the summer of 1959 which had indicated axle loads of up to 24,000 lb or wheel loads of 6, 000 lb and tire inflation pressure of up to 115 psi at service temperatures. This results in contact pressures of 120 psi for maximum conditions and 75 to 85 psi for average conventional loaded truck conditions. The pneumatic tired rollers hitherto in use in Louisiana with 2000 lb wheel load and 55 psi inflation pressure exert anywhere from 37 to 55 psi of contact pressure, a range well below that imposed by the present day heavy track traffic. In order to equalize the rolling pressures with those being obtained under truck traffic, this study was conducted with a view to eliminate or at least minimize rutting of asphaltic concrete surfacing.
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