Sustainable utilization of bauxite residue (Red Mud) as a road material in pavements: A critical review

Sustainable utilization of the bauxite residue (red mud) generated from alumina refining has recently increased due to environmental concerns because its high alkalinity and problematic pollutants when placed in landfills. This paper attempts review recent research findings utilizing red mud as a road material pavement structures literature, including bases asphalt mixtures. Previous laboratory investigations indicated that is feasible be used raw with satisfactory unconfined compressive strength (UCS), frost resistance durability performance, but their during service life still unclear. The incorporation mastics was found able improve stiffness, such softening point, complex modulus, viscosity. In terms mixtures, replacing limestone filler mixtures by resulted some positive effects on mechanical behaviors, bulk density good rutting resistance. However, moisture susceptibility raveling became relatively worse addition mud. Referring this overview, it necessary qualify long-term performance base materials prepared using accelerating evaluation or trials. For mud, how durability, particular resistance, will future focus. addition, influence cracking at low temperature, fatigue properties needed further explored.