Concrete block with structured surface, has structure formed by removing pieces or particles of material embedded into concrete surface

摘要

The structured surface (12) is formed by at least partially embedding pieces or particles of material (16) into the concrete and then removing this material by burning, dissolving or the like to leave behind an irregular arrangement of cavities. The block has at least one decorative visible or useful surface with a structure comprising cavities and raised profiles. An Independent claim is also included for the concrete block production method.