Cutback Bitumen (Medium & Rapid) / MC / RC / SC
Produktbeschreibung
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.
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.
Cutback Classification
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.
Grades & Properties
Grade | Curing Speed | Viscosity | Penetration of Residue |
---|---|---|---|
MC 30 | Medium | 30-60 | 120- 150 |
MC 70 | Medium | 70-140 | 120- 150 |
MC 250 | Medium | 250- 500 | 120- 150 |
MC 800 | Medium | 800- 1600 | 120- 150 |
MC 3000 | Medium | 3000- 6000 | 120- 150 |
RC 70 | Rapid | 70-140 | 80- 120 |
RC 250 | Rapid | 250-500 | 80- 120 |
RC 800 | Rapid | 800- 1600 | 80- 120 |
RC 3000 | Rapid | 3000- 6000 | 80- 120 |
*Kinematic Viscosity at 140 deg F ( 60 deg C), in Centistokes, Penetration of Residue at 77 deg F (25 deg C) , 100 grams, 5 seconds
SPECIFICATION FOR MEDIUM CURING CUT BACK BITUMEN
PROPERTY | RANGE | |||
---|---|---|---|---|
BITUMEN MC 30 | BITUMEN MC 70 | BITUMEN MC 3000 | ||
Kinematic 1 viscosity @ 60°C,e St | 30/60 | 70/140 | 3000/50000 | |
Flash Point ( Tag Open- Cup), ° C | 38 | 38 | 36 | |
Distillation Test°@360 °C | – | – | – | |
Residue from distillation to 360 °C, Percent volume by different | 50% | 55% | 80% | |
Test on residue from distillation | – | – | – | |
Viscosity at 60° C | 300-1200 | 300-1200 | 300-1200 | |
Penetration at 25 ° C, 100g, 5 Sec | 120/150 | 120/150 | 120/150 |
SPECIFICATION FOR RAPID CURING CUTBACK BITUMEN
PROPERTY | GRADE | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
RC-30 | RC-70 | RC-250 | RC-800 | RC-3000 | |||||||
Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | ||
Flash point(open tag)deg C | – | – | – | – | – | 27 | – | 27 | – | 27 | |
Kinematic Viscosity at 60decC (mm 2/3) | 30 | 60 | 70 | 140 | 250 | 500 | 800 | 1600 | 3000 | 6000 | |
Distillate to 360 dec C | |||||||||||
to 190 dec C | 15 | – | 10 | – | – | – | – | – | – | – | |
to 225 dec C | 55 | – | 50 | – | 35 | – | 15 | – | – | – | |
to 260 dec C | 75 | – | 70 | – | 60 | – | 45 | – | 25 | – | |
to 315 dec C | 90 | – | 85 | – | 80 | – | 75 | – | 70 | – | |
Residue from Distillation | 50 | – | 55 | – | 65 | – | 75 | – | 80 | – | |
to360dec C, Volume % by diffrence test on residue from distillation | – | – | – | – | – | – | – | – | – | – | |
Penetration @25deg C,100g 5s, (0.1 mm) | 80 | 120 | 80 | 120 | 80 | 120 | 80 | 120 | 80 | 120 |
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