Underlay device for prefabricated concrete parts has spacing elements fitted in protective layer on all sides of core sector

摘要

The low-abrasion underlay device (1) produces prefabricated concrete parts with at least one core sector (2) with one or two core sector layers (5, 6), which is surrounded on all sides by a protective layer (3) with high wear abrasion resistance. Spacing elements (4) are fitted in the protective layer on all sides of the core sector.