Evaluation of potential applicability of modified solvent deasphalted residue as an asphalt crack sealant

Solvent deasphalted (SDA) residue is produced from the solvent deasphalting process, one of the heavy oil refining processes, and is considered to be more difficult to form or process because more oil is removed than asphalt used as a bituminous material for road pavement. In this study, to evaluate the applicability of the SDA residue as a crack sealant, it was modified with oil, crumb rubber, and SBS copolymer, investigated cone penetration, softening point, resilience, asphalt compatibility, and bond test at low-temperature. The various tests conclude that SBS copolymer and crumb rubber improved the elasticity of the SDA residue, and the addition of oil caused ductile behaviour. By adjusting the proportions of the additives, SDA residue-based sealant has been produced that meets the requirements, indicating that the SDA residue could be used as a crack sealant.