Cutback Bitumen ( Liquid  Bitumen ) is Bitumen that is dissolved in a solvent . Typical solvents include Naptha, gasoline and kerosene, white spirit etc. The type of solvent controls....
Cutback Bitumen ( Liquid  Bitumen ) is Bitumen that is dissolved in a solvent . Typical solvents include Naptha, gasoline and kerosene, white spirit etc. The type of solvent controls the curing time  while the amount determines  the viscosity of the Cutback Bitumen.
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The advantage Cutbacks have over Emulsions is a much higher residual Bitumen percent, typically over 80% compares 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.
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Cutback bitumen can be sprayed at quite lower temperatures compared to the neat bitumen. The solvent will evaporate after application to leave the remaining material similar in hardness to the original bitumen.
Cutback Classification
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Cutbacks are divided into two classifications, Rapid-Curing (RC) and Medium-Curing (MC) depending on the solvent used. They are further defined by a number which indicates the minimum kinematic viscosity (fluidity) of the cutback.Â
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