A milestone
The way is now paved for planning and building with carbon concrete
The solidian GRID are registered with the German Institute for Building Technology (DIBt) as Carbon reinforcement grids approved for the first time in the form of a general building approval (abZ) including a general type approval (aBG). solidian GRID reinforcements can therefore be used as single or multi-layer tensile reinforcement (up to 6 layers) for concrete components on the basis of the abZ/aBG and the newly publishedDAfStb guideline - "Concrete components with non-metallic reinforcement". A commented version of the DAfStb guideline has been published as DAfStb booklet 660 "Explanations and examples of the DAfStb guideline for concrete components with non-metallic reinforcement".
The approval of the solidian GRID applies to carbon concrete components that are manufactured in the precast concrete plant or as in-situ concrete components. The carbon concrete components are produced either by casting or by laminating.
The solidian GRID can be used as load-bearing or structural reinforcement for components that are mainly subject to bending stresses with predominantly static loads, such as:
- Facades and sandwich panels
- Balconies
- Bridges (primarily static loads)
- Parking garage slabs
- Garage floor slabs
- Underground garages
- General bending beams
solidian GRID as statically load-bearing reinforcement
When using solidian GRID as load-bearing reinforcement, the following boundary conditions must be observed (valid for all exposure classes as well as internal and external components):
- Concrete formulations according to DIN EN 206-1 and DIN EN 13670 with concrete strength classes of C30/37 to C70/85 with a maximum grain size of 16 mm.
- Minimum component thickness: 30 mm (central arrangement of the reinforcement).
- For larger component thicknesses, a concrete cover of
at least 14 mm is required. - The component temperature must not fall below -20 °C and must not permanently exceed the annual average temperature of 40 °C typical for Europe. Climate-related short-term temperature increases of up to 80 °C are possible.
- Observance of the other boundary conditions in accordance with the DAfStb guideline - "Concrete components with non-metallic
reinforcement". - Currently, only components for which calculated shear reinforcement is not required may be reinforced.
Further possible uses of solidian GRID
The exclusive structural use of solidian GRID also allows the combination with steel reinforcement and, in addition to the concretes in accordance with DIN EN 206-1, the use of concretes in accordance with the cast stone standard DIN 18500.
The approved solidian GRID can be delivered as a flat, individual reinforcement grid or wound up in large lengths as a roll, which means that joints in the longitudinal direction of the grid can be avoided even in large carbon concrete components. The approval of solidian GRID therefore offers excellent conditions for a wide range of applications in the production of carbon concrete components.
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solidian GRID as family approval
Solidian has succeeded in obtaining approval for solidian GRID as a family approval. This means that not only the previously known reinforcement grids (names in brackets according to the guideline)
- solidian GRID Q95-CCE-38
[solidian GRID Q95-C-EP-s38-F275] - solidian GRID Q85-CCE-21
[solidian GRID Q85-C-EP-s21-F262] - solidian GRID Q71-CCE-51
[solidian GRID Q71-C-EP-s51-F207] - solidian GRID Q47-CCE-38
[solidian GRID Q47-C-EP-s38-F144] - solidian GRID R95/24-CCE-38/76
[solidian GRID R95/24-C-C-EP-s38/76-F278/72] - solidian GRID R24/95-CCE-76/38
[solidian GRID R24/95-C-C-EP-s76/38-F72/278]
covered, but also possible other grids with grid widths from 21 mm to 76 mm. The same materials must be used to manufacture the grids and, among other things, the minimum tensile properties defined in the approval must only be demonstrated as part of the initial sample test.
At this point, we would like to thank the IMB - Chair and Institute for Concrete Structures at RWTH Aachen University for their cooperation in the approval process.
