The Remstal valley is a roughly 80 km long river valley situated east of Stuttgart. The first intercommunal garden show took place between May and October 2019. In this connection, three pedestrian and cycle bridges were erected in an integral bridge design in the municipalities of Urbach and Weinstadt. In this case, integral means that a wooden bridge body is monolithically connected to the concrete abutments.
The clear width of the bridge span is between 16 and 38 m. Although wood was the material initially favored as pavement, the planners ultimately decided to realize the three bridges with a totally different construction material: carbon-reinforced concrete.
Innovation in every detail
The advantages of carbon-reinforced concrete as against conventionally reinforced concrete: Unlike steel, carbon does not corrode. As a consequence, the concrete cover can be much thinner, which also reduces the weight of the individual elements. Along with the up to six times higher strength in comparison to reinforcing steel, this innovative construction material offers new design options as regards the planning of slender elements.
Good advice and cooperation
They also decided to use Solidian GRID, a carbon grid (Q95/95-CCE-38) impregnated with epoxy resin, as reinforcement for the slabs. The manufacturer offers this product in the maximum dimensions of 1.2 m x 5.0 m or in roll form, and they are flexible concerning the openings, fully responding to requirements of the customer. In addition, Solidian manufactures three-dimensionally shaped reinforcements, which they perfectly adapt to the customer‘s requests. This solution was also used for the bridge in the Remstal valley.
Approval on a case-by-case basis
It was not necessary to carry out tests – which is unique in Germany so far. This saved costs and shortened the time required for obtaining the approval. The service life of the bridge near Stuttgart can be estimated at about 80 years. Thus, the residents and tourists of the Remstal region will be able to use it for a very long time.
Text: Dipl.-Ing. Claudia El