Cutback Bitumen

Cutback Bitumen

Cut-back is simply a combination of asphalt cement and petroleum solvent. Like emulsions, Cut back Bitumen use because they reduce asphalt viscosity for lower temperature uses. (tack coats, fog seals, slurry seals, stabilization material).

Meanwhile Similar to emulsions asphalts, after apply cutback Bitumen . The petroleum solvent evaporates leaving behind asphalt cement residue on the surface to which apply it. However Cutback asphalt is said to “cure” as the petroleum solvent evaporates away.

As a result, The use of cutback Bitumen is decreasing because of:

•Environmental regulations. Cutback asphalts contain volatile chemicals that evaporate into the atmosphere. Emulsions asphalts evaporate water into the atmosphere.
•Loss of high energy products. However The petroleum solvents use require higher amounts of energy to manufacture and are expensive compare to the water and emulsifying agents use in emulsiions asphalts.

Furthermore In many places, cutback asphalt use is restricted to patching materials for use in cold weather

MC-30

It is medium curing (MC) cut-back asphalt consisting of penetration grade asphalt cement. And diluent or ‘cutter’ of medium volatility.The diluent temporarily reduces the viscosity of the asphalt cement for ease of handling and application. After application the diluent evaporates, leaving asphalt cement to perform its function.

Meanwhile Petrochemical Trade Cut-back MC-30 conforms to the specifications of ASTM D2127 (Medium-Curing Asphalt) or AASHTO M82. The major use for Petrochemical Trade. Cutback MC-30 is in the road maintenance industry where it use as a prime coat of the base course prior to placing of the bituminous surface course. Meanwhile Its purpose is to bind the granular material of the base course to the asphalt layer. Usual application is by spray using a distributor.

MC-70

is medium curing (MC) cut-back asphalt consisting of penetration grade asphalt cement and diluent or ‘cutter’ of medium volatility. The diluent temporarily reduces the viscosity of the asphalt cement for ease of handling and application. After application the diluent evaporates, leaving asphalt cement to perform its function.

Meanwhile Petrochemical Trade Cutback MC-70 conforms to the specifications of ASTM D2127 (Medium-Curing Asphalt) or AASHTO M82a) Roofing – As a waterproofing membrane and as an adhesive to stick chippings onto a flat, horizontal roof to minimize the effects of weathering from the sun.
b) Damp-Proof Courses – Use as damp-proof membranes in concrete floors particularly for small repairs or where extensions are keyed-in to existing structures.

MC-250

 After application the diluent evaporates, leaving asphalt cement to perform its function.

Meanwhile Petrochemical Trade Cutback MC-250 conforms to the specifications of ASTM D2127 (Medium-Curing Asphalt) or AASHTO M82a) Roofing – As a waterproofing membrane and as an adhesive to stick chippings onto a flat, horizontal roof to minimize the effects of weathering from the sun.
b) Damp-Proof Courses – Use as damp-proof membranes in concrete floors particularly for small repairs or where extensions are keyed-in to existing structures.

MC-800

It is a medium curing (MC) cut-back asphalt consisting of penetration grade asphalt cement and diluent or ‘cutter’ of medium volatility.
However The diluent temporarily reduces the viscosity of the asphalt cement for ease of handling and application. Meanwhile After application the diluent evaporates, leaving asphalt cement to perform its function.
Petrochemical Trade Cutback

MC-800

conforms to the specifications of ASTM D2127. (Medium-Curing Asphalt) or AASHTO M82a) Roofing.  As a waterproofing membrane and as an adhesive to stick chippings onto a flat, horizontal roof to minimize the effects of weathering from the sun.
b) Damp-Proof Courses – Used as damp-proof membranes in concrete floors particularly for small repairs or where extensions are keyed-in to existing structures.

MC-3000 

It is a medium curing cut-back asphalt consisting of penetration  asphalt cement and diluent or ‘cutter’ of medium volatility.
The diluent temporarily reduces the viscosity of the asphalt cement for ease of handling and application. furthermore After application the diluent evaporates, leaving asphalt cement to perform its function.
Meanwhile Petrochemical Trade Cutback MC-3000 conforms to the specifications of ASTM D2127 (Medium-Curing Asphalt) or AASHTO M82a) Roofing – As a waterproofing membrane and as an adhesive to stick chippings onto a flat, horizontal roof to minimize the effects of weathering from the sun.
b) Damp-Proof Courses – Used as damp-proof membranes in concrete floors particularly for small repairs or where extensions are keyed-in to existing structures.

RC GRADES

In conclusion The specification for Rapid Curing (RC) Cut back Asphalts applies to liquid asphaltic materials in the form of asphalt cement combined with a petroleum solvent of a gasoline type. Meanwhile RC Cutback Asphalts are specified by the following grades: RC-70, RC-250, and RC-800. Also Rapid Curing Cutback Asphalt shall consist of asphalt cement which has been liquefied by blending with a gasoline type of petroleum solvent.