Mineral construction waste – from the demolition of buildings, for example – is processed and used as an aggregate to manufacture recycled concrete (RC). The aggregate from these materials is employed as a substitute for the gravel or crushed natural stone that are normally employed in the production of concrete. The use of recycled concrete is governed by a guideline issued by the Deutscher Ausschuss für Stahlbeton (German Committee for Reinforced Concrete). This guideline permits crushed old concrete to be used along with masonry and brick rubble. Recycled concrete allows a variety of colours to be realised, which adds to its interest as an architectural design element.
Recycled concrete as a design element
HERING Architectural Concrete has developed a formula for concrete that satisfies the demands made on aesthetics and durability. The options for treating surfaces include, for example, fine washing, acidification and the sanding of surfaces.
Active contribution to environmental protection
One aspect that makes the use of recycled concrete in architecture attractive is the fact that it’s possible to reflect the demolished old structure in the new build’s components. It allows finishes to be realised that reveal the fact that recycled concrete has been used – thus immediately demonstrating that the technology is helping conserve natural resources and protect the environment.
(Photos: ©Fotodesign Andreas Braun, Hameln)