Acidified surfaces
An acidified surface is achieved if the top layer of fine mortar of the concrete surface is removed by means of an acid. Only the cement skin is removed, the abrasion giving the surface its artificial appearance.

Project: Office and retail building, Hansaallee 70, Frankfurt
Architect: Lyson Architekten und Ingenieure, Frankfurt
Photo: Claus Graubner, Frankfurt
The concrete determines the colour
It is possible to obtain different “acidification depths”. The colour of the surface is mainly determined by the finest aggregates in the concrete since the coarser aggregates are only exposed to a very limited extent.
Picture gallery: Acidified surfaces
Click on pictures to enlarge
Further surfaces of Hering's architectural concrete






