Project overview

According to the field test, 13 frame column deflection, which has 10 column bar deviation is greater than or equal to 30mm. For a steel bar with a bias greater than 30mm, we will planting rebars with HM-500 injectable anchoring adhesive.

Structural strengthening materials

steel rebar

HM-500 injectable anchoring adhesvie

acetone(Preparation of acetone for cleaning oil and colloid pollution)

Note

1. The positioning of the placement of steel bar must be required by the comprehensive design (construction). It is necessary to avoid damage to the main rib of the structure when drilling.

2, when drilling, we must first light drilling and positioning, and then force vertical top pressure to drill slowly. The aperture, Kong Shen and verticality should be strictly controlled in accordance with the requirements, so as to meet the requirements.

3, cleaning in holes or moisture in the holes will have adverse effects on the bond between structural adhesives and concrete, making them fail to achieve the designed bond strength and affect the knot quality. The process of "four blows and three brushes" must be taken seriously when clearing the hole.

4, preparation of colloid to accurate measurement, according to the construction period of the calculated quantity considering the loss after preparation, construction stage division to consider setting time and speed of construction of adhesives, colloid before preparation to do the injection anchorage preparation, preparation is completed, glue injection and anchorage to continuously, without interruption, to ensure that the before the completion of construction of condensation colloid.

5. When injecting glue into the hole, we should master the injection amount, not too much or too little. There is a lot of spillover, waste and pollution of the colloid after the implantation of the over - Dora tendon. Too little, the water injection in the hole is not full, and the bond strength is not enough. During construction, the grouting device should be strictly controlled by the grouting device. When necessary, the mark is made at the 3cm of the injection nozzle.

6, the use of liquid glue, insert the tie bar to the hole before the end must take certain implantation glue to ensure full hole colloid.

7. When inserting a steel bar into the hole, it should be rotated in one direction and inserted at the edge of the rim so that the colloid and the rebar are fully bonded.

8, rebar must be reused before planting. To ensure the bonding strength of the colloid and the bond strength between the glue and steel and glue and concrete, it meets the design and specification requirements.

9, implant steel bar must prevent rust and stick impurity. Before construction, wipe it with acetone solution to ensure no rust and cleanly, and no impurity and oil on the surface.

10. Before the rebar glue is solidified, the rebar is strictly prevented from being disturbed, and the construction of the next process can be carried out after the time is reached.