Thesis Open Access

Assessment of Defects in the Quality of Rural Road Construction Projects: -A Case Study on Fiche-Gerbagurecha Flexible Pavement Road

Gemechu Mechessa

Thesis supervisor(s)

Dr. Melaku Sisay

The main objective of this study is to assess defects in rural flexible pavement road projects in-order to identify appropriate type maintenance needs for the projects. Pavement maintenance work is performed from time to time to keep a pavement under normal conditions of as nearly as possible in its as-constructed condition. The selection of the right maintenance strategy at the right time is the most importance for an effective management of highway pavements. The appropriate maintenance strategy will be influenced by the type, severity, and extent of the pavement surface distresses and the structural and roughness condition of the pavement.
The purpose of pavement maintenance is to correct deficiencies caused by distresses and to protect the pavement from further damage. A condition rating of the pavement will help determine what pavement maintenance technique is necessary. To identify maintenance type and rehabilitation need for the road, Pavement condition assessment is done by collecting condition survey and IRI as input data from Ethiopian Roads Authority. In order to obtain an overall assessment of pavement conditions for a road network, it is often necessary to combine individual distress data to form composite index called pavement condition index (PCI) summarizes the condition of each pavement segment. This pavement condition index is used to recommend the type of maintenance required for the road.
The pavement evaluation results from the manual PCI survey revealed that all sections of road were fair condition. The pavement that has been studied would seem to require maintenance. Thick overlay (sometimes called surface treating) is needed in a whole pavement.

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