30 January 2025
Chemically post-tensioned steel-fibre-reinforced slab technology is a novel construction approach for industrial ground- and pile-supported slabs. It allows for the same structural benefits as traditional post-tensioning approach with strand, while at the same time is more economical, faster to implement and allows for considerable embodied carbon savings. This technology was recently brought to the UK by Primekss after almost 20 years of development and field experience in the Northern Europe.
Winning both the Net Zero and Sustainability categories at the Construction Excellence Awards for Bowmer + Kirkland, the O&M facility for the Dogger Bank windfarm at Port of Tyne represents a pile-supported slab solution.
The project required the design and installation of a ground-level slab for warehouse, maintenance and office areas at various levels. The piling grid ranged from 3 × 3m to 4 × 6m with no enlarged heads.
The adoption of an efficient PrīmX self-stressing steel-fibre-reinforced concrete (PrīmX SSSFRC in short) solution reduced the consumption of both concrete and reinforcement to achieve a net embodied carbon saving of 55%. This was demonstrated by comparing the traditional plain reinforced proposal of 260mm concrete with 180kg/m3 reinforcing bar to the 190mm chemically post-tensioned solution with 50kg/m3 steel-fibre reinforcement. In addition, the project delivered jointless panels with no dominant joints and a lifetimes flatness guarantee – no risk of drying shrinkage induced curling at the day-joints.
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