Evaluation of Pavement Condition : A Case Study of Elgaili – Shendi Highway

Abstract

This research provided a procedure to evaluate ( Elgaili–Shendi Highway ) pavement condition in relative to surface distresses condition. The procedure consist of a methodology to evaluate pavement distresses in terms of types, severity levels and amounts of different distresses and combined these informations to develop a standard pavement condition index (PCI).The pavement condition index is a numerical index between 0 and 100 and was used to indicate the condition of the highway. The highway was divided into sample units for field data collection. Based on the number of sample units in the total section, a certain number of these sample units were selected to be tested. The type and severity levels of pavement distresses in each sample units were recorded. The PCI of each tested sample unit were calculated. The calculations were involved the distress quantities and the distress densities for each tested sample unit. Deduct values were determined and subtracted from 100 to give the PCI value. The PCI of the total section was determined based on the sample units values. To make effective decisions about the type of treatment needed, the structural evaluation of a pavement should be taken into consideration. The structural evaluation included Dynamic Cone Penetrometer (DCP) test. Determination of pavement condition index and pavement layers strength lead to the perfect maintenance.