What is the required temperature for pre-heating the screed compared to the asphalt material?

The requirement for the screed to be pre-heated to a temperature nearly the same as the asphalt material is crucial for several reasons. When the screed is pre-heated effectively, it ensures proper bonding between the asphalt and the substrate, which enhances the overall quality and stability of the pavement. This similarity in temperature helps to prevent thermal shock, which can lead to defects in the finished surface, such as tearing or inadequate compaction.

Moreover, having the screed at a temperature close to that of the asphalt allows for better flow and workability of the asphalt mixture as it is laid down. This results in a smoother application and more uniform distribution across the surface, which is essential for achieving the desired performance characteristics of the roadway. By maintaining this temperature relationship, the properties of the asphalt are optimized, leading to a longer lasting and more durable surface.