الفهرس 
ABSTRACTOnly 14 pages are availabe for public view
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Abstract
Water can lead to moisture damage, modulus reduction, and loss of strength in the pavement system. In Egypt, the influence of moisture on pavement performance can be seen in the areas that experience large seasonal fluctuations in moisture conditions such as the Nile-Delta region. This study aims at developing a rational design methodology for flexible pavements considering the effect of water existence in the pavement system as a part of the design procedure.
For experimental work, five comprehensive testing programs were conducted on three different typical subgrade materials mostly subsisted in Nile-Delta region beside one type of aggregate base material and two typical HMA types to cover the materials investigational and performance process. These programs are participating in a comprehensive practice including laboratory and semi-field testing along with field monitoring programs. a laboratory-scale test-pit test facility was manufactured. It constructs and simulates pavement profile and vehicle dynamic impact on the pavement layers of a flexible pavement system on a laboratory-scale basis.
To gain a better practical understanding of the waterways effect on the pavement’s performance, three roads with different adjacent waterway conditions in Nile-Delta region were selected and studied in terms of visual inspection, materials characterization, and monitoring of ground water table fluctuation monthly along one year. The results obtained were analyzed and compared with those achieved experimentally and found to be consistent.
For investigating the most concession parameters that should be considered in the design and analysis of pavement considering the effect of water existence.