Mellemlag

Mellemlag is a Danish term that translates roughly to "intermediate layer" or "middle layer." It is a generic label used in several technical fields to describe a layer situated between a lower layer and an upper layer. The exact meaning depends on the context, but the core idea is a distinct stratum that performs a specific role within a layered system.

In construction and civil engineering, mellemlag refers to a layer placed between the base or subbase and the wearing surface. This intermediary layer can help distribute loads, improve drainage, and enhance durability. Common materials for a mellemlag include various aggregates, asphalt mixtures, or cement-treated bases, with thickness and composition defined by design standards for pavements or roadways.

In geology and soil science, mellemlag denotes a distinct stratum between the surface layer and deeper sediments or rock. Characteristics such as grain size, mineral composition, moisture regime, and permeability distinguish the layer and influence processes like infiltration, runoff, and groundwater movement.

In manufacturing and coatings, the term can describe an intermediate coating between a primer and a topcoat. This mellemlag serves functions such as improving adhesion, providing a barrier, or leveling surface irregularities.

Overall, mellemlag emphasizes layered design and its impact on structural performance, drainage, and durability. The concept is common in Danish technical literature, with approximate equivalents used in other languages, such as “mid-layer” or “intermediate layer,” adapted to the relevant field. See also: layer (geotechnical), pavement structure.