Introduction to Cutback Bitumen SC-70
Cutback bitumen SC70 is a key component in various construction applications, known for its ability to maintain liquidity at ambient temperatures. This article explores the properties, uses, manufacturing process, safety guidelines, and FAQs related to SC-70 cutback bitumen
Properties of Cutback Bitumen SC-70
Cutback bitumen SC70 typically contains between 12 and 40 percent distillate, impacting its viscosity and application characteristics. Understanding these properties is crucial for effective utilization in construction projects, especially in road surfacing and waterproofing.
Manufacturing Process of SC-70 Asphalt
It is produced by fluxing asphalt cement with a less volatile distillate, such as gas oil. This process results in materials similar to heavy fuel oils, making SC-70 suitable for various applications, including prime coats and cold-applied treatments.
Uses of Cutback SC-70 Asphalt
IT finds widespread use in penetrating prime coats, patching mixtures, and waterproofing applications. Its easy application and adhesion properties make it ideal for bonding loose mineral particles and sealing surfaces.
Packing and Safety Measures
Packing of SC-70 cutback bitumen typically involves thick steel drums on pallets to prevent leaks during transportation and storage. Safety precautions include referring to Safety Data Sheets (SDS), eliminating ignition sources, wearing appropriate personal protective equipment (PPE), and avoiding product contact with skin or water systems.
Specification of Cutback Bitumen SC70
| property | specification limit | Test method | |
| Min | Max | ||
| Kinematic viscosity at 60°C [140°F], mm2/s | 70 | 140 | ASTM D2170 |
| Flashpoint(Cleveland open cup), °C [°F] | 60 | — | ASTM D92 |
| distillate test | |||
| Total distillate to 360°C [680°F], volume % | — | 35 | ASTM D402 |
| Solubility, % | 95 | — | ASTM D2024 |
| Kinematic viscosity on distillation residue at 60°C [140°F], mm2/s | 200 | 7000 | ASTM D2170 |
| Asphalt residue: | |||
| Residue of 100 penetration, % | 40 | — | ASTM D243 |
| Ductility of 100 penetration residue at 25°C [77°F], cm | 50 | — | ASTM D113 |
| Water, % | — | 0.5 | ASTM D95 |
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