The method of steel plate reinforcement is a widely used method of strengthening concrete members. It is not only the use of profiled steel or steel plate on the surface of the original component, but also on the four corners or sides. The high strength cement mortar or structural epoxy resin is perfused between the surface of the concrete component and the crevice of the outsourced steel. At the same time, the transverse plate or hoop is used as the connector to improve the overall mechanical performance of the reinforced component.

How to test the construction quality of steel plate bonded?

1.The adhesive strength and the plump of the glue should be checked.

• Inspection of bonding strength for bonded steel reinforcement shall be conducted by inspection organizations on site. The practice is to paste standard blocks for testing the tensile bond strength of each reinforced component. Under the condition of contact pressure, the 7d is maintained. At the time of maturity, on-site inspection and conformity assessment of the tensile bond strength between the steel and concrete shall be carried out immediately by the staff of the institution. The quantity and method of inspection shall be determined according to appendix E of the code for design of reinforcement of concrete structures (GB 50367-2006).

• The plumpness detection of the perfusion structure glue should be sent from the inspection organization to the site by the instrument or the knocking method, for example, the paste type steel and steel plate can be knocked lightly by a small hammer, the bonding effect is judged from the sound, or the density of the sticker is detected by the ultrasonic method. The detection result is qualified as the empty drum rate is not more than 5%.

  Check the number: full check.

2.The external appearance of the reinforced component should be no stain, no residual material such as glue or gel, the sealing of the injection hole and the vent hole should be smooth, and the base and the debris of the injection nozzle should be completely removed.

Check the number: full check.

Test method: observation.

The method of steel encased steel reinforcement is necessary for strengthening the concrete beam and column structure that needs to increase the bearing capacity and seismic capacity of the section greatly. But the key node in the construction period should be controlled in place, otherwise the construction is not in place to the expected reinforcement effect and rework, that is, reconstruction, time consuming and cost material delay the time limit.