Description of Cutback Bitumen SC-250
Cutback Bitumen SC-250 is a slow-curing asphalt used in pavement construction and treatment. It is composed of penetration grade asphalt cement and a slow-volatility diluent or cutter, meeting ASTM D2028-97 specifications. SC-250 and SC-70 are cutback asphalts that resemble residual refinery products, commonly used as heavy fuel oils. They are also known as “road oils.”
SC-250 is dissolved in solvents of kerosene, which is added as a cutter or cutback agent to reduce the viscosity of bitumen. This reduces the bitumen’s viscosity, aiding in the construction of seal coats in road pavements. The cutback agent evaporates from the seal coat, becoming a negligible component a few months after application. However, significant amounts of the cutback agent may result in an unwanted long-term softening effect.
Cutback Bitumen SC-250 Application
SC250 is a long-lasting solution bitumen used in the road construction industry for manufacturing factory cold asphalt, base, liner, and topping for continuous grading. It is commonly used in bitumen spraying and dust binder dusting. The application time and type of bitumen should be considered before ordering.
SC250 is commonly used for stockpile patching mixes, mixing with aggregate, as a prime coat, and cold-applied as it doesn’t require thinning or heating, saving time. It can also be used to waterproof surfaces, plug voids, and coat and bond loose mineral particles. It is important to consider the time and type of application before ordering bitumen.
Packing
Packing of this grade bulk in tanker and also in new steel and thick drum on pallet to prevent all leak inside of container.
Specification
| Properties | Min | Max | Test Method |
|---|---|---|---|
| Kinematic viscosity at 60°C [140°F], mm2/s | 250 | 500 | ASTM D2170 |
| Flash Point (Cleveland open cup), °C | 60 | – | ASTM D92 |
| Distillate test: | |||
| Total distillate to 360°C (680°F), volume % | – | 25 | ASTM D402 |
| Solubility, % | 95 | – | ASTM D2042 |
| Kinematic viscosity on distillation residue at 60°C (140°F), mm2/s | 400 | 10000 | ASTM D2170 |
| Asphalt residue: | |||
| Residue of 100 penetration, % | 50 | – | ASTM D243 |
| Ductility 100 penetration residue at 25°C (77°F), cm | 50 | – | ASTM D113 |
| Water, % | – | 0.5 | ASTM D95 |
