The first point of crack repair--surface treatment

1. The original component surface polished

Along the crack, insert the bamboo stick or other nails as a temporary mark in the crack to find the crack after grinding. And then on both sides of the cracks on both sides of the original parts of the surface, with a blasting machine or grinding machine grinding flat until the exposed solid new surface, after inspection without grease, dirt with a compressed air machine or vacuum cleaner clean.

2. chisel

When the design requirements to sewing groove along the cracks, should be specified in the form of cross-section (such as V-shaped, U-shaped, etc.) and the size of the crossed, cut, trim and clean up. If the design does not specify the groove, it should be chiseled U-shaped groove. If the original components of the surface is uneven, should to cut into a smooth and easy to close the smooth arc, no local protrusion or height difference.

3. Adhesive surface treatment

The adhesive surface treatment in the crack chamber shall be carried out under the guidance of the manufacturer's instructions or under the guidance of a professional engineer assigned by the manufacturer of the product.

4. Control interface moisture content

The moisture content of the interface of the original part should be controlled according to the requirements of the adhesive manual. If it is difficult, you should use the wet surface of the special structure of the adhesive.

5. Adhesive surface treatment

Whether or not the adhesive surface of the crack cavity needs to be treated before and after the perfusion repair depends on the design and conditions of use of the repair product. Therefore, the product must be strictly in accordance with the provisions of the instructions. On the important structure or the use of experience in the construction unit, should also request the factory to send professional and technical personnel to visit the site.