GRIN Verlag Performance evaluation of rigid and flexible pavement in Addis Ababa City Road Authority Projects

Academic Paper from the year 2022 in the subject Engineering - Civil Engineering, Ambo University (Technology), course: Construction Engineering and Management, language: English, abstract: Transportation plays a vital role in facilitating economic development of a country. In particular, road transport acts as a means for the movement of people and agricultural products. Addis Ababa City Roads Authority executed both, constructing new roads as well as rehabilitate and maintain the existing road pavement. Therefore, a good pavement performance is essential for economic prosperity and industrial development. In recent days, Addis Ababa City Roads Authority is working on increasing the city roads coverage, but the biggest issue is the loss of performance and becoming a problem for the users in various aspects. The purpose of this study is to assess purposely-selected road stretches that are rigid and flexible pavement type work on defect type extent and severity of the defects in detail and to perform Pavement condition Index calculations. According to ASTM D 6433 - 07, the results from this study show, that the pavement condition rating is considered as a serious case. The study shows, that flexible pavement has lots of potholes and alligator cracking with different severity, but the majority of the area is having active construction of multipurpose mixed-use buildings and the waste of the structure including concrete and other materials is disposed to the main road. Because of this, the manhole inlets cause stagnant water on the pavement and lead to deterioration of the pavement. The side roads are used as business areas, the plots don't have parking area and almost all the drainages are blocked by the shop owners for the case of bad smell. For the case of the rigid pavement, only cracking and patching small parts is seen on site and comparatively the rigid pavement does not have that much defect. Addis Ababa city roads Authority practiced pavement making from flexible to rigid and has already become better to minimize pavement deterioration as well as pavement maintenance cost. In addition, the city roads authority road asset departments should have followed and made continuous road evaluations and let the maintenance department take immediate action on the pavement before the deterioration got worse.