Title: NEW DESIGN METHODOLOGY FOR FLEXIBLE PAVEMENTS
Abstract: A new pavement design methodology was initially developed for the needs of Egnatia road, since there was no up to date Greek pavement design methodology. The new methodology is analytical and is based on approved mathematical equations developed by various established institutions. It uses the elastic multilayer theory and the following design criteria: a) the bituminous layers should not crack under the developed tensile strain, b) the subgrade should not deform extensively under developed compressive strain and c) the thickness of the unbound layers must be sufficient so as the construction traffic does not overstress the subgrade. The typical bituminous mixtures used in the analysis were dense asphalt concrete, porous asphalt, SMA and the gap graded mixture for thin surfacing. The methodology uses three design parameters: a) the cumulative number of standard axle over the design period, b) the bearing strength of the subgrade expressed in CBR and c) the mean annual air temperature (MAAT). Having determined the need and thickness of the capping layer from subgrade's CBR value, the thickness of the subbase/base layer is chosen using the recommendations tabulated. For the covering abstract see ITRD E118499.
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: article
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