MC 250 Cutback Bitumen
MC250 Cutback Bitumen is a medium-curing asphalt product with higher viscosity compared to lighter variants, designed for applications requiring slower curing and longer workability. It is produced by dissolving bitumen in a solvent, which reduces its viscosity for easier handling, pumping, and uniform application. The medium-curing nature of MC250 ensures gradual solvent evaporation, allowing deep penetration into the substrate and strong adhesion, while minimizing the risk of premature cracking or shrinkage. Its characteristics make it particularly suitable for surface treatments, priming, and specialized road construction projects where a slower curing bitumen is preferred.
MC250 demonstrates excellent durability, water resistance, and consistent performance across varying environmental conditions. Key properties such as kinematic viscosity, flash point, penetration, and ductility are carefully controlled according to international standards to provide reliable results. Its higher viscosity and controlled curing rate make it ideal for contractors who need extended working time and uniform coating on pavements, resulting in high-quality, long-lasting road surfaces that can withstand heavy traffic and climatic stresses.
| Cutback Bitumen Medium-Curing-250 Specifications | ||||
|---|---|---|---|---|
| Properties | Specification Limit | Test Method | ||
| Min | Max | |||
| Kinematic viscosity at 60°C, cST | 250 | 500 | ASTM D2170 | |
| Flash point (Tag Open Cup), °C | 66 | – | ASTM D3143 | |
| Distillation test – Distillate, volume % of total to 360°C (680°F) | ||||
| Residue from distillation to 225°C (437°F) | – | 20 | ASTM D402 | |
| To 260°C (500°F) | 5 | 55 | ||
| To 316°C (600°F) | 60 | 90 | ||
| To 360°C (680°F), % by volume difference | 67 | – | ||
| Test on residue from distillation | ||||
| Viscosity at 60°C (140°F) | 30 | 120 | ASTM D2170 | |
| Penetration 25°C (77°F), 100g, 5s, mm | 120 | 300 | ASTM D5 | |
| Ductility 25°C (77°F), 5 cm/min, cm | 100 | – | ASTM D113 | |
| Solubility in trichloroethylene, % | 99 | – | ASTM D2042 | |
| Water, % by volume | – | 0.2 | ASTM D95 | |
