How should truing and leveling mix be placed to fill ruts deeper than 6 inches?

When dealing with truing and leveling mix to fill ruts that are deeper than 6 inches, the best practice is to place the mix in more than two layers. This approach ensures better compaction and stability of the asphalt. If too much material is placed in a single lift, it can lead to improper compaction because the weight of the roller and the depth of the layer may not allow for adequate consolidation of the asphalt mix. By applying the mix in multiple thinner layers, each layer can be compacted effectively, thereby achieving a denser, more stable surface.

Using multiple layers also helps mitigate the risk of air voids, which can affect the durability and performance of the pavement. Additionally, it allows for better temperature control during the compaction process, leading to improved bonding and adhesion between layers. This layered approach is essential, especially for deep ruts, to ensure that the repair not only fills the rut but also maintains the overall integrity and strength of the pavement structure.