Cast iron semi-grouting sleeves

During construction, the sleeve is placed over the connected rebar on one side of the precast component’s joint and embedded within the precast component. During embedment, ensure that the sleeve’s grouting and overflow ports are exposed (extending with PVC pipe if necessary). Use a dedicated rubber plug to seal the gap between the rebar and the sleeve wall, the exposed grouting ports, the overflow ports, and the rebar insertion port on the other end of the sleeve to prevent concrete and wastewater from entering the sleeve during concrete pouring. When fabricating the precast component on the other side of the joint, allow the required overlap length for the connected rebar as per design requirements.

During on-site assembly of the precast component, remove the rubber plug and insert the reserved rebar into the corresponding sleeve joint. Use sealing mortar to seal the joint. After the sealing material has solidified, use specialized equipment to force the mixed sleeve grouting material through the sleeve’s grouting port. Stop grouting once the sleeve is filled with grouting (with grout flowing out of the overflow port). After the prescribed curing period, the rebar connection is complete.

• Prefabricated buildings: Vertical and horizontal rebar connection for shear walls, beams, columns and composite slabs.

• Municipal bridge engineering: Prefabricated piers, bridge caps and box girders.

• Underground engineering: Utility tunnels, tunnel supports and subway segments.

• Industrial construction: Factory columns, heavy-duty floors and equipment foundation reinforcement connection.