A study on the determination method of the rut deduct value in the calculation of asphalt pavement condition index

According to the domestic and foreign studies on the determination methods of rut deduct value and in combination with the comparative analysis on the measured data and the actual pavement condition in entitative engineering, the thesis analyzed the advantages and disadvantages of the current methods to determine rut deduct value and proposed a continuous type calculating formula to determine rut deduct value: K=0.000064RD3 (RD hereby refers to rut depth, mm). Research showed that the PCI values obtained based on the current methods to calculate rut deduct value were mostly different from the actual pavement condition to a great extent, while the PCI values obtained with the calculating formula of rut deduct value proposed in this thesis were consistent with the actual pavement condition.