Penetration Grade Bitumen And Their Specifications

Penetration grade bitumen or penetration asphalt is a type of bitumen classified and graded based on its penetration value, which is a measure of its consistency or hardness. It is a type of bitumen used in various construction and road paving applications. The penetration value is determined using a standard needle, how deeply it penetrates into the bitumen sample under specific conditions. The standard test method for determining the penetration value is ASTM D5 or equivalent methods.

Features of Penetration Grade Bitumen

Penetration Grade Bitumen is commonly used for

• Penetration Value: The depth (measured in tenths of a millimeter) to which a standard needle can pierce a bitumen sample at a given load and temperature is known as the penetration value. Penetration value is normally expressed in units of 0.1 millimeters (0.1 mm) and is used to categorize different grades of bitumen.
• The penetration measurement reveals the consistency or hardness of the bitumen. While bitumen with higher penetration values is softer, bitumen with lower penetration values is harder and more viscous.
• Standard Grades: Penetration Grade 40/50, 60/70, 80/100, and 120/150 bitumens are typical grades. The lower limit of penetration is represented by the first number (40, 60, 80, or 120), and the upper limit is represented by the second number (50, 70, 100, or 150).
• Uses: For varied applications, multiple penetration grades are employed. Harder grades, such as 120/150, are better suited for low-temperature regions and places with less traffic, whilst softer grades, such as 40/50, are suitable for high-temperature regions and locations with higher traffic loads.
• Penetration grade bitumen is frequently combined with aggregates to make asphalt mixtures used in the construction of roads. The area's climate and traffic patterns will determine the penetration grade that should be employed.
• Penetration grade bitumen can be blended with other bitumen types or changed with additives to fulfill the requirements of a particular project. This versatility is useful for meeting a variety of climatic and building requirements.

For a particular project, it's critical to select the right penetration grade bitumen to ensure the durability and effectiveness of the asphalt mix. The best grade for a particular application depends critically on elements including climate, traffic volume, and environmental factors. To select the best bitumen grade for your application, contact top bitumen suppliers in the UAE.

Penetration Grade Bitumen Specification (AASHTO M 20 and ASTM D 946)

Bitumen Specification European Standard (BS EN 12591)