In FDOT specifications, what does the term "lift thickness" refer to?

The term "lift thickness" refers to the vertical measurement of a layer of asphalt pavement. In asphalt paving, a lift is a layer of asphalt placed during the paving process. The specified lift thickness is crucial for ensuring proper compaction and performance of the asphalt layer.

Lift thickness is important for several reasons. Proper lift thickness can facilitate adequate compaction, which is essential for preventing issues such as rutting or cracking over time. Additionally, adhering to specified lift thicknesses allows for uniformity in pavement structure, which contributes to the overall durability and performance of the asphalt roadway.

Understanding this terminology helps professionals ensure they are following specifications that optimize the paving process and extend the lifespan of the pavement. The other choices, while they may pertain to different aspects of asphalt paving, do not accurately define "lift thickness."