الفهرس 
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Abstract
The supplies of natural materials used III constructing new
pavements are reduced and disposal of the old pavement materials is an
environmental problem. Thus the old materials must be recycled.
This study concerned with studying the possibility of reusing the old
asphaltic surface course from flexible pavement (asphalt granulate) in
constructing untreated base course. To study this possibility, the behavior
of base course materials using asphalt granulate with different percentages
mixed with each crushed limestone and sandy gravel is investigated. The
effect of adding asphalt granulate to the mixture on maximum dry density,
optimum water content, impact, wear, unsoaked and soaked C.B.R at
, erent compaction energies are also studied.
Results indicate that, increasing the percentage of asphalt granulate
in the mixture decreases the maximum dry density, optimum water content,
unsoaked and soaked C,B.R. and abrasion resistance but increases impact
resistance. It can be concluded that the asphalt granulate can be reused in
OODltructin’: g the untreated base course under certain conditions.