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.

Penetration grade bitumen

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)

Units 40/50 60/70 80/100 100/120 Test Methods
Specific Gravity @25°C - 1.01-1.06 1.01-1.06 1.01-1.05 1.01-1.04 ASTM D-70
Penetration @25°C, 100gm, 5sec 0.1MM 40-50 60-70 80-100 100-120 ASTM D-5
Softening Point, Ring & Ball °C 52-60 49-56 45-52 42-49 ASTM D-36
Ductility @25°C, after TFOT, Min CM 100 100 100 100 ASTM D-113
Loss on Heating, Max %Wt 0.2 0.2 0.5 0.5 ASTM D-6
Drop in Penetration after Heating, Max % 20.0 20.0 20.0 20.0 ASTM D-6 & D-5
Flash Point Cleveland open cup, Min °C 250.0 250.0 232.0 250.0 ASTM D-92
Solubility in CS2, Min %Wt 99.5 99.5 99.5 99.5 ASTM D-4
Organic Matter Insoluble in CS2, Max %Wt 0.5 0.5 0.5 0.5 ASTM D-4
Spot Test - Negative Negative Negative Negative *A.A.S.H.O.T.102
*American association of state highway officials

Bitumen Specification European Standard (BS EN 12591)

Units 35-50 40-60 50-70 70-100 100-150 Test Methods
Penetration @25°C, 100gm, 5sec 0.1MM 35-50 40-60 50-70 70-100 100-150 EN 1426
Softening Point, Ring & Ball °C 50-58 48-56 46-54 43-51 39-47 EN 1427
Resistance to Hardening@163°C
Change in mass, Max %Wt 0.5 0.5 0.5 0.8 0.8 EN 12607-1
Retained Penetration, Min 0.1MM 53 50 50 46 43
Softening point after hardinging, Min °C 52 49 48 45 41
Other Properties
Flash Point Cleveland open cup, Min °C 240 230 230 230 230 230
Solubility in CS2, Min %Wt 99.0 99.0 99.0 99.0 99.0 EN 12592
Kinematic Viscocity @135°C, Min mm2/S 370 325 295 230 175 EN 12595

Bitumen Penetration Grade 20/30

This bitumen penetration grade is a typical or normal penetration grade Bitumen that is used for the construction of roads and for the production of asphalt pavements with finer properties. It is also used in the hot mix asphalt for bases and wearing courses. Learn More

Bitumen Penetration Grade 40/50

This is the type of bitumen used for the manufacturing of hot mix asphalt for bases and wearing courses and is used in road construction in tropical regions. Due to its high air blowing and penetration, it is used in tropical areas with warm weather. Learn More

Bitumen Penetration Grade 60/70

This bitumen is a standard penetration grade, appropriate for the construction of roads, and produces a superior quality of asphalt pavement. It is also used in the applications of chips and spraying. Due to its medium air blowing and penetration, it is used in mild areas. Learn More

Bitumen Penetration Grade 80/100

This one is also suitable for the construction of roads, streets and for the manufacturing of high-quality asphalt pavement. Moreover, its chief use is spraying and the application of chips. Due to its relatively low air blowing and penetration, it is used in cold areas. Learn More

Gulf Bitumen

With respect and confidence, we are well known for providing exceptional service quality, technical expertise, customer support, and rapid and accurate response to the customer's needs.



Get notified about new releases.