Bitumen MC-70

Cutback Bitumen (Liquid Bitumen) is Bitumen that is dissolved in a solvent. This is done to reduce the viscosity of the bitumen temporarily so it can penetrate pavements more effectively or to allow spraying at temperatures that are too cold for successful sprayed sealing with neat bitumen. Typical solvents include Naphtha, gasoline and kerosene, white spirit etc. The type of solvent controls the curing time while the amount determines the viscosity of the Cutback Bitumen. The materials used to cutback bitumen will evaporate after application to leave the remaining material similar in hardness to the original bitumen.

Uses: Major use for Cutback MC-30 is in the road maintenance industry where it is used as a prime coat of the base course prior to placing of the bituminous surface course. Its purpose is to bind the granular material of the base course to the asphalt layer. Usual application is by spray using a distributor. Other uses include the following:

• Roofing: As a waterproofing membrane and as an adhesive to stick chippings onto a flat, horizontal roof to minimise the effects of weathering from the sun.
• Damp-Proof Courses: Used as damp-proof membranes in concrete floors particularly for small repairs or where extensions are keyed-in to existing structures.
• Fish Net Coating: To prolong service life of fish nets.

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