melting point of bitumen

Easy way to recognize melting point of bitumen

Double number of softening point is melting point for instance bitumen 60/70 softening point is 48 to 52  so melting point is 96 to 105 centigrade and it is filling temperature to drum or tanker as well.

Methods of Determining the Melting Point of Bitumen

Accurate determination of the melting point of bitumen is crucial for selecting the appropriate grade for specific applications. Several methods are employed to measure this essential temperature characteristic. Let’s take a look at the most commonly used techniques:

1. Softening Point Test

The softening point test is a widely accepted method for determining the melting point of bitumen. In this test, a sample of bitumen is subjected to controlled heating while placed in a ring and ball apparatus. The temperature at which the bitumen sample softens and touches the bottom of the ring is recorded as the softening point, which is closely related to the melting point.

2. Differential Scanning Calorimetry (DSC)

Differential Scanning Calorimetry is a precise technique used to measure the heat flow associated with phase transitions in materials. It can be utilized to determine the melting point of bitumen by monitoring the heat absorbed or released during the transition from a solid to a liquid state.

3. Rheological Testing

Rheological testing involves analyzing the flow behavior of bitumen under controlled conditions. By applying different shear rates and temperatures, the melting point of bitumen can be deduced based on the changes in viscosity and flow properties.

FAQs About the Melting Point of Bitumen

Let’s address some frequently asked questions regarding the melting point of bitumen:

Q: What is the typical melting point range of bitumen?
A: The melting point range of bitumen typically falls between 120°C (248°F) and 160°C (320°F), although it can vary depending on the grade and composition.

Q: How does the melting point of bitumen 60/70 affect road construction?
A: The melting point of bitumen is critical in road construction, as it determines the temperature range at which the bitumen will adequately bond and adhere to the aggregate material, ensuring the longevity and stability of the road surface.

Q: Can the melting point of bitumen be modified?
A: Yes, the melting point of bitumen can be modified through the addition of polymers or other additives. This allows for customized bitumen formulations that are suitable for specific climatic conditions or desired performance characteristics.

Q: How does the melting point affect the durability of roofing materials?
A: The melting point of bitumen is essential in roofing applications. It ensures that the material remains stable and doesn’t deform or lose its integrity under high temperatures, providing a reliable barrier against water and weather elements.

Q: Does bitumen have a different melting point in different regions?
A: The melting point of bitumen can vary based on the specific climate and environmental conditions of a region. Bitumen used in hotter regions generally has a higher melting point, while bitumen used in colder regions has a lower melting point.

Q: What happens if bitumen exceeds its melting point?
A: If bitumen exceeds its melting point, it may become too liquid and lose its cohesive properties. This can lead to deformation, rutting, or cracking in road surfaces and compromised performance in other applications.


The melting point of bitumen plays a vital role in determining its behavior, performance, and applicability across a wide range of industries. By understanding this essential temperature characteristic, engineers, researchers, and manufacturers can make informed decisions regarding the selection and use of bitumen for specific applications. From road construction to roofing materials, the melting point guides the choice of bitumen grade, ensuring stability, durability, and optimal performance. As we continue to explore the world of bitumen, it is clear that the melting point remains a crucial factor that shapes its remarkable properties and applications.