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Cutback Bitumen

Cutbacks are bitumen preparations in which the viscosity of the binder has been reduced by the addition of a volatile solvent, normally derived from petroleum.

Cutback products are typically used for spraying and some mixing applications. The advantage of cutbacks over emulsions is much higher residual bitumen content, typically over 80% compared with over 40-65% for Bitumen emulsions. The result is more Bitumen left on the roadway after curing, for the same volume of binder applied.

GRADES BITUMEN STANDARD
PROPERTY UNIT MC30 MC70 MC250 MC3000 STANDARD
Penetration @ 250C, for 5 Sec CST 30/60 70/140 250/500 3000/6000 D2170
Flash Point, Min 0C 38 38 66 66 D1310
Residue from Distillation to @ 360 (0C) min %VOL 50 55 67 80 D402
Test on Residue from Distillation
Retained penetration after thin film oven test CM 120/250 120/250 120/250 120/250 D5
Ductility @ 25 (0C) -cm/min after thin oven test CM 100.0 100.0 100.0 100.0 D113
Solubility in Trichloroethylene, Min % 99.0 99.0 99.0 99.0 D2042
Water, Max %VOL 0.2 0.2 0.2 0.2 D95

GRADES BITUMEN STANDARD
PROPERTY UNIT RC70 RC250 RC3000 STANDARD
Kinematic viscosity @ 600C, CST 70/140 250/500 3000/6000 D2170
Flash Point, Min 0C - 27 27 D1310
Residue from Distillation to @ 360 (0C) min %VOL 55 65 80 D402
Test on Residue from Distillation          
Penetration at 250C, 100g, 5 sec CM 80/120 120/250 120/250 D5
Ductility @ 25 (0C) min CM 100.0 100.0 100.0 D113
Solubility in Trichloroethylene, Min % 99.0 99.0 99.0 D2042
Water, Max %VOL 0.2 0.2 0.2 D95