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Predication Model for Rut Depth of Superpave Asphaltic Concrete Mixtures from Wheel Track Test

Author : Hasan H. Joni and Hasan A. Albayati

Pages : 1063-1068
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In Iraq as similar in other countries, rutting is one of major distresses in asphalt concrete pavement as a result of increased in axle loads, and hot summer temperature. This type of distress lead to decreasing the level of serviceability during the pavement design life and creates serious hazards for highway users. Accordingly, evaluating the asphalt concrete rut depth is one of the major aim objective of this study. To investigate the rut depth in asphalt concrete under repeated loadings, Wheel-Tracking device has been used in a factorial testing program according to study parameters. Based on wheel-tracking test results, when temperature duplicated from 30 to 60 ºC the rut depth increases 7 folds. Also, the rut depth is increased about 35 percent when the asphalt content changes from 4.25 to 4.75 percent, whereas it increased about 45 percent when the asphalt content increased from 4.75 to 5.25 percent. Finally, SPSS version 22 software was applied to develop model with = 0.96 to correlate the criterion variable of wheel track rut depth with the predicated variables considered in this study.

Keywords: Rutting, Wheel track test, Flexible pavement distresses, HMA, Superpave, Permanent deformation

Article published in International Journal of Current Engineering and Technology, Vol.7, No.3 (June-2017)

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