The purpose of this investigation was to compare the effect of the F-4 and the F-15 aircraft on rutting performance of standard airfield bituminous mixtures during hot weather conditions. The comparisons and conclusions herein were drawn from trafficking new 4 inch asphalt concrete overlying 12 inches of Portland cement concrete. The asphalt concrete was produced from Ac-30 asphalt cement and 100 percent crushed limestone of 3/4 inch maximum size. Pavement surface temperatures ranged from 80 deg F to 122 deg F during traffic. Both test strips were trafficked simultaneously, back and forth, in a channelized manner 6,000 times by loadcarts that simulated the heaviest designs of F-4 and F-15 aircraft. In one strip, the F-4 loadcart test wheel was loaded to 27.1 kips with cold tire inflation pressures of 265 psi. In the other strip, the F-15 loadcart test wheel was loaded to 30.5 kips with cold tire inflation pressure of 355 psi. It was learned that it takes 5,000 passes of the F-4 to produce a 0.4 inch rut depth in this particular mix, but only 1,000 passes of the F-15. This rut depth of 0.4 inch was far from failure of the layer and was the maximum reached in the F-4 test strip. The dominant mode of rutting was densification with plastic flow of the mixture estimated to have caused about 12 percent of the rutting.
Comparison of Rutting Behavior of Asphalt Concrete under the F-4C/G and F-15C/D Aircraft
1988
145 pages
Report
No indication
English
Civil Engineering , Ceramics, Refractories, & Glass , Asphalt , Concrete , Landing fields , Bituminous coatings , Cements , Density , Failure , Hot weather , Layers , Pavements , Plastic flow , Sizes(Dimensions) , Surface temperature , Test and evaluation , Wheels , Runways , F-4 C/G aircraft , F-15 C/D aircraft
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