Murskeainesta

Murskeainesta, often translated as crushed aggregate, is a granular construction material consisting of crushed rock or recycled concrete particles prepared to meet defined size distributions. It is predominantly inert mineral material such as quartz, feldspar, or carbonate rock, but may include impurities. It is used as a base and fill material in civil engineering, as sub-base layers under pavements, as backfill around structures, and, in certain gradings, as an aggregate in concrete or asphalt.

Production and grading: It is produced by crushing and screening rock or demolished concrete at quarries or recycling facilities. The crushing process creates a range of particle sizes, and screening separates the material into fractions that meet project specifications. The quality is checked with tests for particle size distribution, abrasion or crushing resistance, and moisture or compaction characteristics.

Applications: In road construction, murskeainesta provides load-bearing and drainage layers; in building works it serves as a coarse aggregate in concrete or as a fill material around foundations, pipes, and utilities. The use of recycled concrete as murskeainesta supports circular economy goals.

Standards and sustainability: The exact specifications depend on country and application. International standards commonly referenced include EN 12620 for aggregates used in concrete and EN 13242 for aggregates used in unbound and lightly bound road layers. When produced from natural stone versus recycled material, environmental impacts differ in quarrying, processing energy, and dust generation; proper handling minimizes negative effects.