Concrete cladding element, process for its production, concrete mixtures therefor and use of self-cooling concrete cladding elements to reduce the effect of urban heat islands

摘要

A concrete cladding element (100) for a building, comprising: a first (1) and a second concrete area (2), the first (1) being covered by the second (2) at least at one portion, and the second concrete area (2) this section forms a surface portion (110) of the concrete lining element (100), the first concrete area (1) comprises an absorbent and storable water reservoir (3), and the second concrete area (2) is capillary active and arranged to direct water substantially between Surface section (110) and the first concrete area (1) to lead. Concrete formulation for a concrete section (1) of the concrete cladding element (100) serving as a water reservoir, comprising a mineral binder, the mineral binder comprising a proportion of 200-500 kg / m3; an aggregate aggregate of 1500-1900 kg / m3, an absorbent concrete recyclate (3) containing 5-95% by weight of the aggregate; Includes water at a rate of 75-190 kg / m3 at the concrete mix. Use of a water-storable aggregate in a core concrete (1) for producing a self-cooling concrete lining element (100) comprising a concrete recyclate. Building (200), comprising the described concrete cladding element (100), wherein the concrete cladding element at least partially forms a facade, an outer wall and / or a roof surface of the building.