Abstract
The repetitive traffic loadings that the road experiences during its service life, combined with temperature fluctuations, cause rutting, fatigue and other forms of deteriorations, which ultimately degrade the performance and durability of pavement structures. According to test procedure specified by ASTM D1559 several hot asphalt mixture were prepared, the aggregate blend made by Job mix formula to obtain the percentage of mix material is give Hot-bin one is 26%, Hot-bin two is 23%, and Hot-bin three 51% where hot-bin one is (20-13.2mm), hot-bin two (13.2-5.0mm) and hot-bin three (5.0-0.00mm). The result of Marshall Test on mix design for hot asphalt mixture, for wearing coarse were conclude that the material used for mix design is good, which gives Marshall stability, 12.57 KN with optimum bitumen content of 5.2% (by weight of total aggregate). Hence the quality of aggregate is good but the influence of other factors such as poor drainage courses, level of ground water table, Varity of geological materials along the road rout and poor construction methodology caused the defect. The flow result of the Marshall mix design gives as 3.6 % which is approach of upper limit of specification 4%, So when flow become high in the mix it result long term deterioration of asphalt performance, hence the pavement condition along the study area has been affected by different failure types such as cracks, surface defect and disintegrating from site observation may result of this.
Highlights
The function of highway road pavement is to provide a safe, comfortable, convenient and economical running surface for the passage of fast-moving traffic. [8] A highway pavement is a structure consisting of superimposed layers of processed materials above the natural soil subgrade, whose primary function is to distribute the applied vehicle loads to the sub-grade
The Row material used in this study, the crush stone coarse aggregate and fine aggregate are taken from Ethiopian Road Construction Corporation (ERCC) quarry which the crusher site located in Unkulu of Ana Mana
The properties of aggregates are very important to the performance of Asphalt pavements layer (APL)
Summary
The function of highway road pavement is to provide a safe, comfortable, convenient and economical running surface for the passage of fast-moving traffic. [8] A highway pavement is a structure consisting of superimposed layers of processed materials above the natural soil subgrade, whose primary function is to distribute the applied vehicle loads to the sub-grade. The function of highway road pavement is to provide a safe, comfortable, convenient and economical running surface for the passage of fast-moving traffic. [8] A highway pavement is a structure consisting of superimposed layers of processed materials above the natural soil subgrade, whose primary function is to distribute the applied vehicle loads to the sub-grade. There are roads built on weaker subgrade material and perform worse and cause losses in both serviceability and economy. There have multi problems which are caused by poor quality subgrade or material used for construction. The problem become one of the challenge for the economic activity of the country [7] The function of road pavement is to provide a safe, comfortable, convenient and economical running surface for the passage of fast moving traffic. The problem become one of the challenge for the economic activity of the country [7] The function of road pavement is to provide a safe, comfortable, convenient and economical running surface for the passage of fast moving traffic. [8]
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