| Popis: |
This report presents maintenance and repair (M&R) guidelines and economic analysis procedures for determining optimum repair strategies for a given airfield pavement. The procedures consist of data collection, condition evaluation, identification of feasible M&R alternatives, performing economic analysis, and selection of the optimum M&R alternative. The primary data to be collected are pavement distress types, severities, and amount. This information is then used to compute a pavement condition index (PCI), which is based on a scale of 0 to 100 and measures the pavement structural integrity and surface operational condition. Pavement evaluation is performed through a stepwise procedure which is largely dependent on the PCI and distress data, since they have been found to correlate highly with M&R needs. Other direct measurements, such as profile roughness, hydroplaning potential, and load-carrying capacity, are also included in the evaluation procedure. Guidelines for rational determination of feasible M&R alternatives are presented, based on the results from the pavement evaluation. Included in the guidelines are acceptable alternatives for the localized repair of different distress types at different severity levels. Economic analysis is performed among feasible M&R alternatives, using the present worth method. The optimum alternative is selected based on the results of the economic analysis, mission, and policy. |
