FLEXIBLE PAVEMENT DISTRESS RATING OF FORESTRY ROAD IN OREDO LGA, EDO STATE USING PCI

H.A.P. Audu, C.C. Ogiamien

Abstract


This study examines the flexible pavement distress rating of Forestry road in Oredo LGA, Edo State, using Pavement Condition Index (PCI). Pavement distress refers to the condition of a pavement surface in terms of its general appearance. Distress rating method was carried out based upon visual inspection of observable distresses on Forestry flexible road pavement and was computed based on the summation of the deduct points for each observable distress following the procedure for uniformly identifying distresses in terms of severity and extent according to the American Association Of State Highway and Transportation Officials (AASHTO) road test manual, the condition of the pavement was rated using the PCI scale. The PCI of Forestry road network was determined using the American Standard for Testing Material (ASTM) D6433 standard manual for assessing flexible road pavement condition manually. The distresses identified on forestry flexible pavement road are; raveling, bleeding, patching, potholes, debonding, settlement, wheel track cracking, longitudinal joint cracking and random cracking. Deduct Point for all distresses were obtained by multiplying distress weight times the distress severity weight and distress extent weights. Total deduct point was obtained to be 43.8, and the  PCR-56.2% which was rated FAIR TO POOR condition from ASTM D6433 PCI rating scale. The results in this study showed that the distresses on Forestry flexible road pavement were rated and the condition of the pavement evaluated using PCI.

Key words: Deduct Point, Flexible road pavement, Pavement Condition Index (PCI), Pavement Distress and Pavement Condition Rating (PCR)

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