Polymer modified asphalt binder – an approach for enhancing temperature sensitivity for emergency pavement repair

Conventional hot mix plants operate to support large paving projects, making production more economic with high volume output. When repairs and maintenance are needed, it can be challenging maintain small quantities of bituminous mixtures at a sufficient temperature, especially in the case winter maintenance. Consequently, repair materials cannot compacted desired level on some occasions. This research aimed develop polymer modified asphalt binder reduced temperature sensitivity for hand-laid low-volume applications. The results showed that highest penetration index has been achieved by modifying bitumen 20% rubber 2% wax. FTIR XRD analysis indicated bitumen, wax react chemically build 3D networks have an interlocked structure matrix resulting binder. Furthermore, indirect tensile stiffness, permanent deformation, creep test fatigue life test, water freeze-thaw cycle demonstrated improvement mixture properties terms mechanical durability perspectives. Overall, based this investigation, resulted stronger durable comparison traditional asphalt.