Development of methods improving storage stability of bitumen modified with ground tire rubber: A review

The following paper presents an overview of methods for improving the storage stability at high temperature of rubber modified bitumen. The storage stability of the rubber modified bitumen can be improved by using a various types of modifiers that form the bonds between the components of these binders. The increase in stability can also be achieved by using crumb rubber surface-activated by furaldehyde or ground tire rubber (GTR) treated by gamma irradiation or modified by devulcanization process. The storage stability of rubber modified bitumen can be also improved by preparing compositions obtained from GTR and other components leading to a reduction in density as compared to unmodified GTR. unmodified GTR. •Modification of bitumen by GTR improves its properties.•Density is an important factor in choosing bitumen modifier.•Industry uses SBS as physical modifier improving properties of rubberized bitumen.•Storage stability of rubberized bitumen can be improved by using chemical modifiers.•Surface treatment of GTR enhances the storage stability of rubber modified bitumen.