Development of a design methodology for asphalt treated mixtures : tech summary.
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2013-12-01
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Abstract:The increase in energy costs has led to a signifi cant rise in the cost of mixtures containing asphalt cement. This resulted
in a need to search for alternatives that reduce the cost of those mixtures without compromising performance. One such
alternative is the use of asphalt treated mixtures. Asphalt treated mixtures are hot mix asphalt (HMA) mixtures consisting
of crushed rock or natural gravel mixed with low percentages (1 percent below standard HMA mixtures) of paving grade
asphalt cement. These mixtures cost less than typical HMA mixtures because they can be produced with less expensive
aggregates and lower percentages of asphalt cement binder and easier compaction eff orts. Asphalt treated mixtures can be
used in the construction of base course layers as well as shoulders of a pavement structure.
This report summarizes the results of a study that was conducted to develop a simplifi ed design methodology for asphalt
treated mixtures through the examination of the performance of mixtures that have a
diff erent aggregate gradation from typically available sources
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