Bitumen 60/70 for road construction is very important grade of bitumen and bitumen 60/70 is a type of penetration grade bitumen that is widely used in road construction. The numbers 60/70 indicate the range of penetration of the bitumen, measured in tenths of a millimeter (0.1 mm). This grading system reflects the hardness and consistency of the bitumen; in this case, the bitumen has a penetration range between 60 and 70 at standard testing conditions.

Key Characteristics
Penetration: 60/70 penetration grade bitumen has moderate hardness and is suitable for use in temperate climates.
Viscosity: It has a moderate viscosity, providing a good balance between workability and durability.
Adhesion: It offers good adhesion properties, which help in forming a strong bond with aggregate materials in asphalt mixtures.
Temperature Sensitivity: This grade of bitumen performs well across a range of temperatures, providing good flexibility and resistance to cracking in colder temperatures and maintaining stability in warmer conditions.
Applications
Road Construction: Used in the production of hot mix asphalt for road surfaces, ensuring durability and resistance to traffic loads.
Pavements: Ideal for creating pavements and pathways, providing a smooth and stable surface.
Airports: Used in the construction of runways due to its ability to withstand heavy loads and varying weather conditions.
Bridges and Flyovers: Suitable for use in these structures where durability and resistance to stress are crucial.
Advantages
Durability: Provides long-lasting pavement surfaces with good resistance to weathering and traffic stresses.
Workability: Easy to mix and apply, making it suitable for a variety of construction projects.
Flexibility: Offers a good balance between flexibility and rigidity, reducing the likelihood of cracks and deformations.
Cost-Effective: Provides a cost-effective solution for road construction and maintenance.
Handling and Storage
Heating: Bitumen 60/70 should be heated to the recommended temperature range to ensure optimal mixing and application.
Storage: Should be stored in well-insulated tanks to maintain its properties and prevent degradation.