What is the minimum lift thickness that may be used to achieve compaction?

The minimum lift thickness that may be used to achieve compaction is 25 mm. This thickness is essential because it ensures that the material can be adequately compacted to achieve the desired density and stability. When lifts are too thin, it becomes challenging to obtain consistent compaction due to the possibility of incomplete consolidation of the asphalt mixture.

Using a minimum lift thickness of 25 mm allows for better pressure distribution from the compaction equipment, leading to improved performance characteristics of the asphalt pavement. Proper lift thickness contributes to the durability and longevity of the pavement by minimizing the potential for voids and vulnerabilities that could lead to early distresses such as cracking or rutting. Therefore, a lift thickness of 25 mm is an industry standard that provides a balance between workability and structural integrity in asphalt paving practices.