Grid metal for repair and reinforcement of concrete structures.

basic information

■ NETIS Registration (Publication Period Ended) Reinforcement Method for RC Members Using Grid Metal Registration No: QS-150039-A (Subtitle) Reinforcement Method for RC Members Using Steel Plates Processed in a Lattice Shape ■ Road Maintenance and Repair Work - Bridge Repair and Reinforcement Work - Upper and Lower Surface Thickening Work ■ Bridge Superstructure - Steel Bridge Deck Work ■ Common Work - Box Culvert Work - Others ■ A method of reinforcing existing RC structures by integrating lattice-shaped processed steel plates (grid metal) with sprayed polymer cement mortar ■ Expected Effects - Using grid metal improves workability and shortens construction time - Integrating grid metal with polymer cement mortar makes it easier to check the condition of the reinforcement surface - Since the vertical and horizontal bars are integrated, labor-saving in on-site rebar work can be achieved ■ Particularly Effective Application Range - Sites where suppression of dead load increase is necessary - Sites where shortening of construction time is necessary - Reinforcement of the underside of slabs and beams ■ Points to Note - Material properties of members should comply with the Road Bridge Design Guidelines and their explanations, and design calculations should be conducted in accordance with the "Design and Construction Manual (Draft) for Reinforcement Method of RC Members Using Grid Metal" * For more details, please refer to the PDF materials or feel free to contact us.

Price range

P2

Delivery Time

※Two months after the approval of the drawings.

Applications/Examples of results

Construction Achievements - Reinforcement of RC concrete beams (private factory) - Surface repair of concrete slabs (Tochigi Prefecture, Chichinoki Bridge) - Bottom reinforcement of concrete slabs (Tochigi Prefecture, Chichinoki Bridge longevity improvement project) - Interior repair of box culverts (Chiba Prefecture, Nakahara Bridge repair project) *For more details, please refer to the PDF materials or feel free to contact us.

Detailed information

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  Grid metal installation status Grid metal is installed using fixed brackets with concrete anchors. The pitch of the fixed hardware will be 400 mm to 500 mm.

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  Spray concrete After applying the primer, spray polymer cement mortar. Ensure that the mortar is sufficiently filled between the grid metal and the existing concrete (approximately 1 cm) during construction.

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  Completion photo After the spray mortar work, the surface will be finished with plastering work.

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  Grid metal beam reinforcement This is a repair work for deteriorated beams in RC structures. The grid metal is manufactured in a factory and installed using a crane. Since there is no rebar work, on-site labor can be reduced.

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  Outline diagram of grid metal installation Grid metal is integrated with polymer cement mortar as a repair and reinforcement material for existing concrete, increasing the thickness of the existing concrete.

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  Comparison with conventional methods Grid metal, made from steel plates, allows the main reinforcement and distribution reinforcement to be on one surface, making it possible to be thinner than traditional thickening reinforced with rebar. This method is advantageous for reducing dead loads in repair work and securing the internal space for box culvert reinforcement.

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