1. The preparation of polymer mortar must be carried out by a responsible individual to ensure proper mixing and consistent quality.
2. To open the container, turn the lid counterclockwise. Use a mixer or suitable tool to re-stir the adhesive to prevent separation. Ensure the mixture is well-blended without over-mixing, which could lead to poor performance.
3. The correct mixing ratio for polymer mortar is as follows: KL binder : 425# sulphoaluminate cement : sand (sieved through an 18 mesh sieve) at a weight ratio of 1:1.88:3.25.
4. Weigh the cement and sand accurately and pour them into a mixing tank. Add the binder according to the specified ratio and mix thoroughly until the consistency is uniform, avoiding any segregation. If needed, add water gradually to achieve the desired workability.
5. Use clean, potable water for mixing the mortar.
6. Polymer mortar should be used promptly after mixing. It is best to apply it within one hour for optimal performance. Store the mixed mortar in a cool, shaded area to protect it from direct sunlight.
7. Cut the fiberglass mesh from the full roll to the required dimensions, ensuring sufficient overlap or lap length is left for proper coverage.
8. Cut the mesh on a clean and flat surface, making sure the dimensions are accurate. Roll the cut mesh carefully, avoiding folding or stepping on it to maintain its integrity.
9. Reinforce the corners of the building by attaching the reinforcement layer to the innermost side, extending 150mm on each side for added strength.
10. Before applying the first layer of polymer mortar, ensure the EPS board surface is dry and free from contaminants or impurities that could affect adhesion.
11. Apply a thin layer of polymer mortar onto the EPS board, covering an area slightly larger than the mesh size. Maintain a consistent thickness of about 2mm, unless otherwise specified. Avoid applying the mortar directly on the sides of the EPS board.
12. Once the mortar is applied, place the mesh over it. Curve the mesh so that the convex side faces the wall, and press it evenly from the center outward to embed it fully into the mortar. Ensure the mesh is smooth and not wrinkled. After the initial layer dries, apply a second layer of polymer mortar with a thickness of approximately 1.0mm, ensuring the mesh remains fully covered.
13. The overlap between mesh sections should be at least 70mm. In areas where the mesh is cut, use a patch mesh to create a secure joint with the same minimum overlap length.
14. Reinforce the area around door and window openings by placing the grid cloth on the innermost side. If the gap between the door/window frame and the base wall exceeds 50mm, attach the mesh to both the frame and the wall. If it's less than 50mm, fold the mesh over. On large walls, the mesh should be placed outside the door and window frames.
15. At the corners of doors and windows, after applying the standard mesh, position a 200mm x 300mm mesh at a 90° angle relative to the corner’s bisector, securing it to the outermost side for extra reinforcement. A 200mm-long mesh, matching the width of the wall, should also be placed on the inside corner and attached to the outermost side.
16. Below the window sill, install the reinforcing mesh first to protect against impact damage before applying the standard mesh. Ensure proper coverage and adhesion.
17. The application method for the reinforcement layer is identical to that of the standard mesh.
18. Ensure that the grid cloth is fully covered when turning corners to maintain continuity and structural integrity.
19. Apply the mesh from top to bottom, working in a continuous manner. Reuse the standard mesh as necessary for seamless coverage.
20. After the mesh is applied, protect it from rain, impacts, and pollution. Cover doors and windows with protective materials to prevent damage or contamination. Any damage or dirt should be addressed immediately.
21. The protective layer must not be exposed to rain for at least four hours after application.
22. Immediately after the protective layer has set, spray and cure it. If the average daily temperature is above 15°C, curing should last at least 48 hours. If below 15°C, extend the curing time to at least 72 hours.
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