Nano-Al₂O₃ and crumb rubber hybrid asphalt modification

抄録

Despite their effectiveness, asphalt modifiers have unintended consequences and do not meet all the functional requirements of asphalt binders, such as workability, storage stability, cracking resistance, fatigue performance, and permanent deformation. As a potential remedy for the negative issues associated with asphalt modification, hybrid modification is being studied. This research looked at the effects of a hybrid modification of nano-Al₂O₃ and crumb rubber (CR) on the performance of gap-graded asphalt concrete since gap gradation provided adequate space for CR particles to integrate into the asphalt concrete matrix. The asphalt concrete samples were evaluated for moisture damage, cracking, permanent deformation, and abrasion resistance. The result revealed that asphalt binders made with a mix of nano-Al₂O₃, and CR were much stiffer than those made with CR alone. The hybrid modification of nano-Al₂O₃ and CR improves permanent deformation performance, raveling resistance, cracking tolerance, and moisture damage resistance.