I. Definition and Classification

High-temperature asphalt refers to asphalt materials with a softening point above 90°C, which are typically categorized into the following types:

1. Coal Tar High-Temperature Asphalt: Processed from coal tar, its softening point is generally between 100℃ and 150℃.
2. Petroleum Bitumen at High Temperature: Processed from petroleum distillation residue, the softening point is typically between 120℃-200℃.
3. Modified High-Temperature Asphalt: Enhanced through the addition of modifiers such as polymers and rubber powder.

II. Production Process

The production process for high-temperature asphalt mainly includes the following steps:

1. Raw Material Selection: Coal tar or petroleum distillation residue is used as the raw material.
2. Heating Treatment: The raw material is heated to a certain temperature to melt it and remove moisture and light components.
3. Distillation Cutting: Separates various fractions through a distillation tower to obtain high-temperature asphalt.
4. Blended Modified: Modify as needed by adding modifiers to enhance performance.
5. Filter Packaging: After filtering impurities, the product is filled into drums or stored in tanks.

III. Performance Features

High-temperature asphalt boasts the following performance characteristics:

1. High Softening Point: High softening point, resists flow at high temperatures, suitable for high-temperature environments.
2. High thermal stability: Maintains stability at high temperatures, resists decomposition or oxidation.
3. Excellent adhesion: firmly bonds with aggregates, fibers, and other materials, enhancing the overall performance of the material.
4. Corrosion Resistance: Excellent tolerance to chemicals such as acids and alkalis.

Section 4: Application Fields

High-temperature asphalt is widely used in various fields:

1. Road Engineering

• Overload Roads: Designed for heavy-duty roadways such as highways and airport runways, enhancing the pavement's rut resistance.
• Modified Asphalt: Serves as the base asphalt for SBS, SBR, and other modified asphalt types, enhancing modification effectiveness.

1. Waterproof materials:

• Waterproof Membrane: As the base material or additive for waterproof membranes, enhancing their waterproof performance.
• Waterproof Coating: Used for manufacturing waterproof coatings, enhancing the bonding and water resistance of the coating.

1. Fire-resistant materials:

• Binder: Serves as a binder for refractory materials, enhancing the strength and high-temperature resistance of the material.
• Carbon additive: Used in blast furnace molten iron trough material, spaying and repairing material, etc., to improve furnace condition and promote reaction.

1. Industrial Adhesive:

• Electrode Materials: Used for manufacturing electrodes, featuring excellent conductivity and high-temperature resistance.
• Corrosion-resistant materials: Used for the anti-corrosion treatment of pipelines and equipment.