Effect of crumb rubber characteristics on crumb rubber modified (CRM) binder viscosity

Investigating the rheological properties of crumb rubber modified bitumen and its correlation with temperature susceptibility

“…According to a study 13 , the higher the crumb rubber content is, the higher viscosity at 135 °C could improve the rutting properties. It was also observed that the increased crumb rubber amount produced rubberised bitumen with higher viscosity and lower resilience 14,15 . However, for optimum crumb rubber content; crumb rubber size and asphalt binder need to be determined.…”

An investigation on using pre-treated tyre rubber as a replacement of synthetic polymers for bitumen modification

“…FT-wax has the ability to liquefy and significantly reduce the blending viscosity beyond its melting point (Jamshidi et al 2013). Also, research results have indicated that binder modified by cryogenically ground RTR can exhibit lower viscosities than binder modified by ambient ground RTR (Thodesen et al 2009). …”

Rubberised bitumen manufacturing assisted by rheological measurements

“…The viscosity results in Table 3 show would definitely increase due to the polymeric components (<75μm) being released from the CRM and becoming dissolved in the base binder, their relative effect is very small compared to the particulate effect. Support for this conclusion can be found in work undertaken by Thodesen and his co-workers which revealed that the effect of rubber particles on viscosity when considered as inert filler is 12 times greater than the effect of rubber dissolved in the base bitumen (rubber-bitumen interaction) (Thodesen et al 2009). It should be mentioned that the Einstein equation is able to accordingly represent suspensions with low concentrations where the distance between particles is much bigger than the filler radius, while the Frankel equation is able to predict the viscosity behaviour of suspensions with high concentrations (Hesami et al, 2012).…”