Cutback bitumen

Cutback bitumen is a blend of bitumen and solvent, designed for ease of working in lower temperatures and to increase durability. It’s used for road construction and maintenance. Classification of cutback bitumen is determined by solvent used and curing time. Three types are RC, MC, and SC, used respectively for surface treatments, prime coats, and tack coats. Cutback bitumen is cost-effective and easy to use. Cutbacks are also used in cases where bitumen cannot be preheated to make asphalt.
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MC CUTBACK BITUMEN
MEDIUM CURING
CHAQCTEAISTIC UNIT MC30 MC70 MC250 MC3000 TEST METHOD
Kinematic viscosity at 60°C CST 30-60 70-140 250-500 3000-6000 ASTM D 2170
Flash point °C 38 38 66 66 ASTM D 3143
Water Content (MAX) %VOL 0.2 0.2 0.2 0.2 ASTM D 95
Distillate to 360
225 %VOL 10 10 10 10 ASTM D 402
260 %VOL 40-70 25-65 15-55 15-75 ASTM D 402
35 %VOL 75-93 75-87 60-87 80 MIN ASTM 0 402
residue from distillation to 360 %VOL 50 55 67 67 ASTM 0 402
Tests on residue bitumen from distillation
Penettation @ 25°C 0.1 mm 120-150 120-150 120-150 120-150 ASTM D 5
Ducti(ity at 25°C cm 100 100 100 100 ASTM D 113
Soiubility in TCE % WT 99 99 99 99 ASTM D 2040
RC CUTBACK BITUMEN
RAPID CURING
CHARACTERISTIC UNIT RC30 RC70 RC250 RC3000 TEST METHOD
Kinematic viscosity at 60°C CST 30-60 70-140 250-500 3000-6000 ASTM D 2170
Flashpoint °C 27 27 ASTM D 3143
Water Content (MAX) %VOL 0.2 0.2 0.2 0.2 ASTM D 95
Distillate to 360
225 %VOL 55 50 35 10 ASTM D 402
260 %VOL 75 70 60 25 ASTM D 402
315 %VOL 90 85 80 70 ASTM D 402
Residue from distillation to 360 %VOL 50 55 65 75 ASTM D 402
Tests on residue bitumen from distillation
Penetration @ 25°C 0.1 mm 80-120 80-120 80-120 80-120 ASTM D 5
Ductility at 25°C cm 100 100 100 100 ASTM D 113
Solubility in TCE % WT 99 99 99 99 ASTM D 2040

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