ACCESS
Materials resources for road construction are becoming increasingly scarce and expensive. Finding solutions to substitute some of these materials with inexpensive and/or recycled materials is becoming a necessity. Hence the idea of reusing Reclaimed Asphalt Pavement (RAP), a waste from road rehabilitation projects, and dune sand, a cheap and abundant material, both for road construction projects in Tunisia. Different mixes were tested with the addition of several percentages of RAP alone at first and then both RAP and dune sand. The obtained results show the possibility of introducing RAP, at a maximum content of 40%, in the formulation of bituminous concrete. The addition of 10% dune sand makes it possible to considerably improve Marshall stability and flow, water resistance, and compaction behavior of the obtained bituminous mixtures. The results showed that the performance of the designed mixes is similar to that of high-modulus asphaltic concrete.
bituminous concrete, reuse, RAP, dune sand, mechanical properties
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