Introduction to the construction methods of fiberglass mesh

Introduction to the construction methods of fiberglass mesh

fiberglass mesh

Figure 1 Glass fiber mesh cloth

Fiberglass mesh cloth is based on fiberglass woven fabric and soaked in polymer anti-emulsion coating. As a result, it has good alkali resistance, flexibility and high tensile strength in the longitudinal and latitudinal directions, and can be widely used for thermal insulation, waterproofing, crack resistance, etc. of interior and exterior walls of buildings. Glass fiber mesh cloth is mainly alkali-resistant glass fiber mesh cloth. It is made of medium-alkali-free glass fiber yarn (the main component is silicate and has good chemical stability) and is twisted and woven with a special organizational structure – leno tissue. , and then undergo high-temperature heat setting treatment such as alkali resistance and enhancers.

Figure 2 Alkali-resistant fiberglass mesh

Fiberglass mesh is mainly used in wall reinforcement materials, such as fiberglass wall mesh, GRC wall panels, EPS interior and exterior wall insulation boards, gypsum boards, waterproof membranes, asphalt roof waterproofing, fireproof boards, construction Caulking tape and more.

Construction methods of fiberglass mesh:

1. A dedicated person must be responsible for preparing polymer mortar to ensure the mixing quality.

2. Open the lid of the bucket by rotating it counterclockwise, and use a stirrer or other tools to re-stir the adhesive to avoid separation of the adhesive. Stir appropriately to avoid quality problems.

3. The mixing ratio of polymer mortar is: KL binder: 425# sulfoaluminate cement: sand (use 18 mesh sieve bottom): =1:1.88:3.25 (weight ratio).

4. Weigh the cement and sand in a measuring bucket and pour them into the iron ash tank for mixing. After stirring evenly, add the binder according to the mix ratio and stir. The stirring must be even to avoid segregation and porridge-like appearance. Water can be added appropriately according to the workability.

5. Water is used for concrete.

6. Polymer mortar should be prepared as needed. It is best to use up the prepared polymer mortar within 1 hour. Polymer mortar should be placed in a cool place to avoid sunlight exposure.

7. Cut the mesh from the entire roll of fiberglass mesh according to the required length and width, leaving the necessary overlap length or overlap length.

8. Cut in a clean and flat place. The cutting must be accurate. The cut mesh must be rolled up. Folding and stepping are not allowed.

9. Make a reinforcement layer at the sun corner of the building. The reinforcement layer should be attached to the innermost side, 150mm on each side.

10. When applying the first coat of polymer mortar, the EPS board surface should be kept dry and harmful substances or impurities in the board cotton should be removed.

Figure 3 Workers are pasting mesh cloth

11. Scrape a layer of polymer mortar on the surface of the polystyrene board. The scraped area should be slightly larger than the length or width of the mesh cloth, and the thickness should be about 2mm. Except for those with hemming requirements, polymer mortar is not allowed to be applied. On the side of the polystyrene board.

12. After scraping the polymer mortar, the grid should be arranged on it. The curved surface of the grid cloth faces the wall. Apply smooth paint from the center to the surroundings so that the grid cloth is embedded in the polymer mortar and the grid cloth is not It should be wrinkled, and after the surface is dry, apply a layer of polymer mortar on it with a thickness of 1.0mm. The mesh cloth should not be exposed.

13. The overlapping length around the mesh cloth shall not be less than 70mm. At the cut parts, mesh patching shall be used to overlap, and the overlapping length shall not be less than 70mm.

14. A reinforcement layer should be made around the door and window wings, and the mesh cloth of the reinforcement layer should be affixed to the innermost side. If the distance between the outer skin of the door and window frame and the surface of the base wall is greater than 50mm, the mesh cloth should be affixed to the base wall. If it is less than 50mm, it needs to be turned over. The mesh cloth laid on the large wall should be embedded in the outside of the door and window frame and glued firmly.

15. At the four corners of the door and window, after the standard net is applied, add a piece of 200mm×300mm standard net on the four corners of the door and window, place it at an angle of 90 degrees to the bisector of the window corner, and stick it on the outermost side for reinforcement; Add a piece of mesh 200mm long and standard width to the window at the inner corner, and attach it to the outermost side.

16. Below the first floor window sill, in order to prevent damage caused by impact, the reinforced mesh cloth should be installed first, and then the standard mesh cloth should be installed. Strengthen the connection between mesh and cloth.

17. The construction method of installing the reinforcement layer is the same as that of the standard mesh cloth.

18. The mesh cloth pasted on the wall should cover the folded mesh cloth.

Figure 4 Workers are constructing mesh cloth

19. Apply the mesh cloth from top to bottom. During simultaneous construction, apply the reinforced mesh cloth first and then the standard mesh cloth.

20. After the mesh cloth is glued, it should be prevented from being washed away or hit by rain. Protective measures should be taken for doors and windows that are prone to collision. Anti-pollution measures should be taken for the feeding port. Surface damage or pollution must be dealt with immediately.

21. The protective layer must not be exposed to rain within 4 hours after construction.

22. After the protective layer is finally set, spray water for maintenance in a timely manner. When the average day and night temperature is higher than 15°C, it shall not be less than 48 hours, and when the average temperature of day and night is lower than 15°C, it shall not be less than 72 hours.