Sustainable roadway construction using recycled aggregates with geosynthetics

Concrete, asphalt pavements, and ballast are removed during the re-construction of existing roads and have been increasingly recycled as aggregates for the construction of roadways. Due to existence of asphalt, cement, and fines, mechanical properties of recycled aggregates may not be sufficient for load support. They may also have long-term durability problems. Geosynthetics have been used to improve mechanical properties and long-term durability of recycled aggregates. This paper reviews recent research work on the use of geosynthetics to stabilize recycled aggregates in roadway construction and summarizes the main findings on permanent deformation, creep deformation, degradation, stress distribution, and/or crack propagation.