Effect of sulfur on the asphalt cement and asphalt concrete mixture: state of the art

This paper provides an investigation of the impact of adding sulfur to asphalt mixtures. After reviewing many research articles, it is determined that adding sulfur to asphalt mixtures increases their Marshall stability, stiffness, ductility of binder at low temperatures, and specific gravity. The flow and permanent deformation have decreased, on the other hand. For conventional sulfur–asphalt-binder testing, increasing sulfur content from 20 to 40% results in an increase in softening point and a decrease in penetration. Water infiltration resistance of modified sulfur pellet-based asphalt mixtures is comparable to that of conventional asphalt mixtures. However, sulfur has a negative impact on the environment, as well as health and safety implications. Because the oxidation of sulfur dioxide produces a hazardous gas, the use of sulfur in asphalt remains highly limited.