Concept

Indice de l'état de la chaussée

Résumé
The pavement condition index (PCI) is a numerical index between 0 and 100, which is used to indicate the general condition of a pavement section. The PCI is widely used in transportation civil engineering and asset management, and many municipalities use it to measure the performance of their road infrastructure and their levels of service. It is a statistical measure and requires manual survey of the pavement. This index was originally developed by the United States Army Corps of Engineers as an airfield pavement rating system, but later modified for roadway pavements and standardized by the ASTM. The surveying processes and calculation methods have been documented and standardized by ASTM for both roads and airport pavements: ASTM D6433 - 20: Standard Practice for Roads and Parking Lots Pavement Condition Index Surveys ASTM D5340 - 20: Standard Test Method for Airport Pavement Condition Index Surveys The method is based on a visual survey of the number and types of distresses in a pavement. First, the type and extent of existing distresses, their severity level is collected. Next, distress density is calculated for each type of distress. The density values are translated into deduct value (DV) and corrected deduct value (CDV) using a set of curves proposed by the ASTM. The ASTM does not include the formulae of these curves, but they are recalculated by researchers. Finally, the value of the PCI is calculated in an iterative process. The result of the analysis is a numerical value between 0 and 100, with 100 representing the best possible condition and 0 representing the worst possible condition. Pavement distress types for asphalt pavements include: Alligator cracking Bleeding Block cracking Bumps and sags Corrugations Depressions Edge cracking Joint reflections Lane/shoulder drop-off Longitudinal and transverse cracking Low ride quality Patching and utility cut patching Polished aggregate Potholes Rutting Shoving Slippage cracking Swelling Weathering and raveling For relatively small pavement systems, the entire system may be surveyed.
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