Cutback

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Cutback

 

Produced by blending bitumen with solvents, cutback bitumen offers a range of curing times, making it suitable for various weather conditions and application methods. It is commonly used in road maintenance and surface treatments.

 

  • Rapid-Curing Cutback Bitumen: Suitable for urgent road repairs, pothole patching, and pavement maintenance, offering quick curing times and rapid traffic reopening.
  • Medium-Curing Cutback Bitumen: Ideal for surface treatments, tack coats, and priming applications, providing moderate curing times and versatile performance.
  • Slow-Curing Cutback Bitumen: Used in surface dressing, seal coats, and prime coats, offering extended curing times and enhanced adhesion properties.

 

Application

  • Road Construction: Cutback bitumen is commonly used as a binder in road construction projects, especially in areas where hot mix asphalt plants are not readily available or during colder weather conditions.
  • Surface Treatment: It is applied as a surface treatment for dust control on unpaved roads and parking lots, providing stabilization and reducing dust emissions.
  • Prime Coating: Cutback bitumen serves as a prime coat or tack coat to promote adhesion between asphalt layers during pavement construction and repair.
  • Crack Sealing: It is used for crack sealing and repairing potholes in asphalt pavements to prevent water infiltration and further deterioration.
  • Roofing: Cutback bitumen is applied in roofing applications as an adhesive for bonding roofing felts or membranes to various substrates.
  • Waterproofing: It is utilized in waterproofing applications such as sealing joints and seams in concrete structures, providing protection against water ingress.

 

Property MC-30 MC-70 MC-800 MC-3000 Test Method
  MIN – MAX MIN – MAX MIN – MAX MIN – MAX MIN – MAX  
Kinematic viscosity at 60°Cmm2/s 30 – 60 70 – 140 250 – 500 800 – 1600 3000 – 6000 ASTM D2170
Flash Point (Tag Open-Cup), °C 38 – xx 38 – xx 66 – xx 66 – xx 66 – xx ASTM D3143
Distillate test: Distillate, volume percent of total Distillate to 360°C
To 225°C xx – 35 xx – 25 xx – 20 xx – xx xx – xx ASTM D402
To 260°C 30 – 75 10 – 70 5 – 55 xx – 40 xx – 15 ASTM D402
To 316°C 75 – 95 65 – 93 60 – 90 45 – 85 15 – 75 ASTM D402
Residue from distillation to 360°C,percent volume by difference 50 – xx 55 – xx 67 – xx 75 – xx 80 – xx ASTM D402
Tests on residue from distillation
Viscosity at 60 °C 30 – 120 30 – 120 30 – 120 30 – 120 30 – 120 ASTM D2170
Penetration at 25 °C 120 – 300 120 – 300 120 – 300 120 – 300 120 – 300 ASTM D5
Ductility at 25°C 100 – xx 100 – xx 100 – xx 100 – xx 100 – xx ASTM D113
Solubility in trichloroethylene, % 99 – xx 99 – xx 99 – xx 99 – xx 99 – xx ASTM D2042
Water,% xx – 0.2 xx – 0.2 xx – 0.2 xx – 0.2 xx – 0.2 ASTM D95