Bitumen is a viscous, black, and sticky substance that is also known as asphalt. It is a naturally occurring hydrocarbon that is found in deposits around the world, and it is commonly used as a binder in the construction industry.
Overall, bitumen is a versatile material that is widely used in the construction industry due to its durability, strength, and waterproofing properties.
There are several viscosity grades of bitumen used in the construction industry. The most commonly used viscosity grading system is the penetration grading system, which measures the depth in tenths of a millimetre to which a standard needle will penetrate vertically into a sample of bitumen under specific conditions of loading, time, and temperature. The following are some of the commonly used viscosity grades of bitumen:
This is a low viscosity grade of bitumen that is commonly used for surface treatments, such as tack coats and seal coats.
This is a medium viscosity grade of bitumen that is commonly used for surface treatments, such as slurry seals and micro-surfacing.
This is a medium-high viscosity grade of bitumen that is commonly used for hot mix asphalt and other heavy-duty applications
This is a high viscosity grade of bitumen that is commonly used for hot mix asphalt and other heavy-duty applications.
This is a very high viscosity grade of bitumen that is commonly used for asphalt pavements in areas with extreme temperatures and heavy traffic loads.
This is an extremely high viscosity grade of bitumen that is used in specialized applications, such as roofing and waterproofing.
Viscosity grades are used to classify bitumen into different grades based on their physical properties, which can vary depending on the type and source of the bitumen. The use of different viscosity grades of bitumen allows engineers and contractors to select the appropriate type of bitumen for specific applications based on factors such as climate, traffic volume, and pavement condition.
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