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J-RING APPARATUS (B-027) ASTM C1621 • Used to determine the confined flowability of SelfConsolidating Concrete • Used to determine the passing ability of self-consolidating concrete • The apparatus consists of a rigid ring supported on sixteen 16 mm (5/8 in) diameter rods equally spaced on a 300 mm (12 in) diameter circle 100 mm (4 in) above a flat surface. • Supplied with slump cone, tamping rod and base plate. TECHNICAL SPECIFICATIONS • Made of stainless steel • Guillotine form gate TECHNICAL SPECIFICATIONS • Evenly distributed 16 rods, each with Ø 16 mm diameter