ASTM D6433-20 PDF Download

ASTM D6433-20 is a standard practice that outlines the procedure for conducting surveys to determine the condition of roads and parking lots using the Pavement Condition Index (PCI) method. The PCI is a numerical indicator that rates the surface condition of the pavement based on the observed distress, which includes both structural integrity and surface operational conditions. It provides an objective and rational basis for determining maintenance and repair needs, as well as priorities.

The PCI is not intended to measure the structural capacity of the pavement or provide direct measurements of skid resistance or roughness. Instead, it serves as a tool for monitoring the rate of pavement deterioration, allowing for early identification of major rehabilitation needs. It also provides feedback on pavement performance, which can be used for validation or improvement of pavement design and maintenance procedures.

The development of the PCI for roads and parking lots was initiated by the U.S. Army Corps of Engineers and later verified and adopted by the Department of Defense (DOD) and the American Public Works Association (APWA). This standard practice provides guidelines for conducting PCI surveys using visual inspection methods to quantify pavement condition. It should be noted that the PCI represents the collective judgment of pavement maintenance engineers and is an indirect measurement of pavement structural integrity and functional condition indicators.