Polymer Modified Bitumen (PMB)

Polymer modified bitumen (PMB) are mixtures produced from: bitumen polymers in which the polymers change the visco-elastic behavior of the bitumen and thus make this binder more suitable for different stresses.
The most commonly used polymer for bitumen modification is styrene–butadiene–styrene (SBS) followed by other polymers such as styrene–butadiene–rubber (SBR), ethylene-vinyl-acetate (EVA), and polyethylene. SBS block copolymers are classified as elastomers that increase the elasticity of bitumen. Although polymer modified bitumen costs higher than pure bitumen, they are considered to be more economical because of economic benefits of lower costs of road repairs.