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- W659394313 abstract "In many road construction and maintenance applications, asphalt mix recycling is justified. In general, cost saving can be achieved when adopting such an approach. Also energy can be conserved by reusing a respectable fraction of the old aggregate and by reducing the required amount of asphalt. The transportation fuel for moving virgin materials is, therefore, reduced. Among others, two major questions are normally raised regarding the economic feasibility of asphalt mix recycling. These questions are: 1) What is the required recycled layer thickness in a rehabilitated pavement system? and 2) What is the fatigue life of such a recycled layer? The purpose of this research has been to evaluate structurally two different types of hot recycled asphalt mixes, commonly produced in Egypt. These two recycled mixes were previously investigated from a mix design point of view. Approximate fatigue life were determined in lab employing a static type testing procedure. Number of load repetitions to failure at different levels of stresses and strains has been computed using regression models developed for asphalt concrete. For any given pavement system the thickness equivalency factors for different recycled materials has been determined using the Asphalt Institute thickness design computer program. These values have been estimated at different levels of traffic intensities, subgrade support and layer position. It has been found that the fatigue life of a hot asphalt recycled mix is dependent mainly on type of old aggregate, percent of virgin aggregate and the presence of an asphalt softener. The thickness equivalency factor of an asphalt recycled mix depends not only on mix properties but also on other factors relevant to pavement design. (A) For the covering abstract see IRRD 862636." @default.
- W659394313 created "2016-06-24" @default.
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- W659394313 date "1993-01-01" @default.
- W659394313 modified "2023-09-27" @default.
- W659394313 title "STRUCTURAL EVALUATION OF HOT RECYCLED ASPHALT MIXES" @default.
- W659394313 hasPublicationYear "1993" @default.
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