The recycled concrete aggregate RCA was able to take the place of the vierge &
natural aggregate NA, embankments elected,to implement the base&subbase road layaers
and airports in many country of the world.furthermore, there is almost consensus by
a large
of reshershers and scholars about the possibility of using RCA in mix cement concrete for
non-structural elements .whil,the using of RCA in the hot mix asphalt HMA still under
discussion and debate, due its high porosity , high water absorption, and its heterogeneity
which reflected negatively on the mechanical and physical properties of the HMA
This research discusses stadying the possibility of using the recycled concrete
aggregates in hot mix asphalt HMA, for the implementation of the bas layer bituminous
road , by the application of the marshall tests on hot mixtures asphalts have ben prepared
using different ratios of recycled concrete aggregates.
The results of marshall testes showed that the HMA prepared with amount of
recycled concrete aggregates less than 50%,can be used to implement the base layer
bituminous road,according to the general terms and specifications book for road works and
bridges in the syrien arab republic.
