Bergkross

Bergkross is a term used in Swedish and Norwegian (and Danish) to describe crushed rock that serves as aggregate for construction and landscaping. It is produced by crushing bedrock or quarried rock and then screening the material to separate it into different size fractions. The rock can be a range of primary materials, including granite, basalt, limestone, or gneiss, depending on local geology.

Common grades cover a spectrum from fine gravel suitable for drainage and base layers to larger, decorative stones used in landscaping. Because the particles are angular, bergkross typically offers good interlock in compacted layers and effective drainage, making it suitable for road sub-bases, concrete aggregates, drainage layers, and underlay for pavements.

In landscaping, bergkross is used as ground cover or as a decorative aggregate in flower beds, paths, or rock gardens. In construction, it forms part of the sub-base in roads and buildings and can be used as coarse aggregate in concrete, depending on the grade and quality.

Quality characteristics commonly include cleanliness (low clay and organic content), appropriate maximum particle size, and minimal fines content. Availability and prices vary with local quarry activity, transport costs, and the type of rock used. Environmental considerations include quarrying impacts and recycling of demolished concrete where permitted.