Cutback Bitumen SC-70 is a mixture of bitumen and kerosene, used to reduce the viscosity of bitumen, aiding in the construction of seal coats in road pavements. The process involves selecting the appropriate bitumen grade, adding a specific amount of solvent, mixing the mixture, and subjecting it to quality control tests. Bitumen SC-70 can be exported to various regions in East Asia, such as China, Malaysia, Thailand, Taiwan, Vietnam, Philippines, Indonesia, and Cambodia. Additionally, it can also be exported to certain African countries, including Congo, Djibouti, and Rwanda.

Description of Bitumen Cutback SC-70

Cutback bitumen SC-70 is dissolved of bitumen in solvents of kerosene. In many countries kerosene and other volatile petroleum derived products are added as a cutter or cutback agent to bitumen to reduce (or cutback) the viscosity of the bitumen. The mixture obtained may be called cutback bitumen.

The reduction in viscosity of the bitumen aids the construction of seal coats in road pavements as the softened mixture wets the chips more easily. The cutback agent evaporates from the seal coat, the cutback agent becoming a negligible component of the seal coat a few months after application. If significant amounts of the cutback agent remain in the seal coat an unwanted long term softening effect may result.

Process of Producing Cutback Bitumen SC-70

Cutback bitumen SC-70 is produced through a relatively simple process involving the blending of bitumen and a solvent.

Steps Involved:

• Base Bitumen Selection: The appropriate grade of bitumen is selected based on the desired properties of the final product.
• Solvent Addition: A specific amount of solvent, typically kerosene, is added to the bitumen. The ratio of bitumen to solvent determines the viscosity and other properties of the final product.
• Mixing: The bitumen and solvent are thoroughly mixed to ensure a homogeneous blend. This process is usually done in specialized mixing tanks.
• Quality Control: The resulting cutback bitumen is subjected to quality control tests to ensure it meets the specified standards for viscosity, solvent content, and other relevant properties.

Application of Bitumen Cutback SC70

SC70 uses in penetrating prime coats and in producing patching or stockpile mixtures. Cutback asphalt used in mixing with aggregate will usually contain an adhesion agent to assist in the coating of the aggregate surface.

Cutback bitumen SC-70 consist of initial incorporation of asphalt into the surface of non-asphalt based course preparatory to any superimposed treatment of construction.
The cutback asphalt SC-70 applying to waterproofing of surfaces, plug capillary voids, coat and bond loose mineral particles.

Cutback Bitumen SC-70 serves various purposes, including:

• Surface Incorporation: It is used to incorporate asphalt into non-asphalt based surfaces before any further construction treatment.
• Waterproofing: SC-70 is applied to waterproof surfaces effectively.
• Void Filling: It plugs capillary voids, ensuring a smooth surface.
• Mineral Particle Bonding: It coats and bonds loose mineral particles, enhancing surface stability.
• Viscosity Reduction: Cutback agents, like Kerosene, are used to lower bitumen viscosity, making it suitable for priming road surfaces.
• Cold Application: SC-70 is ideal for cold application, eliminating the need for thinning and heating.

Advantages of Cutback Bitumen SC-70

Cutback bitumen SC-70 offers several advantages for road construction and maintenance:
Key Advantages:

• Improved adhesion: Due to its slower curing time, it penetrates deeper into the base material, creating a stronger bond between layers.
• Versatility: Can be used in a wide range of weather conditions.
• Cost-effective: Generally more economical than other bitumen types.
• Easy application: Lower viscosity allows for easier spreading and application.
• No heating required: Unlike pure bitumen, it can be applied cold, saving time and energy.
• Waterproofing properties: Provides good waterproofing for the base material.

Safety of cutback bitumen SC-70

• Refer to Safety Data sheets before use.
• Transport, use and store at the lowest temperature possible.
• Eliminate all potential ignition sources during application.
• Avoid breathing vapors. Avoid contact with skin.
• Always wear appropriate PPE including heat protection when used hot.
• DO NOT allow product or washings to enter stormwater or sewer systems.

Specification