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The J-Ring is made of galvanised steel and has a rectangular cross-section of 30 × 15 mm and a median diameter of 300 mm. Sixteen cylindrical bars, measuring Ø18 × 140 mm and spaced 41 mm apart, are mounted around the ring. This simulates dense reinforcement and makes it possible to assess the concrete’s ability to pass through obstacles.
The equipment is suitable for laboratories and testing environments where self-compacting concrete flow properties need to be evaluated in a standardised and reproducible way.
