الفهرس | Only 14 pages are availabe for public view |
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. |