Rinse with clean water immediately after brushing, and then carry out the next process after drying.
The two scrapers shall be clean, and no floating putty is allowed.
It is required that the surface should not only be flat, but also have uniform texture, otherwise the color depth may be inconsistent, affecting the decoration effect.
● Cooked rubber powder+water+Shuangfei powder+white latex has been introduced from abroad after reform and development, and has been in use in Europe and America up to now.
Before applying putty, clean the wall with a broom and a spatula.
Disadvantages: There are many harmful residues such as formaldehyde; It is easy to peel by layers and should not be too thick; It is easy to mildew and damp and has been banned by the state.
8.
Due to floor slab, materials, isolating agent and other reasons, the flatness of the wall is poor, and there are often air holes, honeycombs, pitted surfaces, internal and external corners are not smooth, and bulges.
Although it seems that the wall can be dried, it actually locks the water in the wall.
If you want to scrape putty quickly and well, you need to master certain skills.
2、 Putty construction process ★ Base course treatment of cast-in-place concrete wall.
The mix proportion (weight ratio) of white putty is white powder: talc powder: cellulose solution (concentration 5%): lotion=60:4o: 75:2-4.
The second coat shall be painted after the first coat is completely dry, so as not to brush off the wall..
● Water based putty Water based putty powder+water was gradually used in China in 2002.
For precast concrete floor slab and slab joint base course, a specially assigned person must brush once with a steel wire brush to remove floating sand, pimples, dust and other debris on the surface.
Understand the proportion of putty and water, and mix the putty with uniform quality.
4.
3.
Advantages: The surface hardness is high after putty is applied.
6.
Cost price: generally, the price of glue putty is 10-15 yuan/m2.
First scrape the top and the upper part of the wall, and finally scrape the lower part of the wall; The action essentials of puttying are that the wrist force should be uniform, and the scraper should be applied obliquely, so that the excess putty can be collected.
7.
The spraying must be uniform, and the glue mix ratio (weight ratio) of no missed spots is clear water: lotion=100:15~20.
It is important to treat the base course of the wall well.
Apply putty for three times, so that the flatness is better, and the thickness of putty is controlled at about 2mm, not exceeding the size requirements.
For example, neutral wall lining can be used for internal walls, and flexible waterproof putty can be used for external walls.
Generally, at least two layers of putty shall be applied.
When stirring to the paste, it needs to stand for 5-10 minutes, and then stir slightly.
The mix proportion (weight ratio) of gypsum putty is gypsum: lotion: cellulose aqueous solution (concentration 5%)=100:5~6:60.
When polishing, light shall be used for polishing, and the internal and external corners must be vertical and horizontal.
When scraping putty, if there are protruding sand particles or other sundries, they should be disposed in time.
When applying putty, it is necessary to prevent dirt such as sand particles from being stained or mixed.
★ After the first layer of putty is scraped, the parts repaired first shall be rechecked.
3、 Precautions for putty construction 1.
For the cement mortar paper reinforced mortar surface course, it is required that the surface base course be dry, solid and clean (free of floating soil oil stain).
If there is any problem, the collapsed parts shall be repaired and leveled with putty.
Attention shall also be paid to the painting.
If the base course has joints or missing corners, we need to use repair putty to repair them.
Advantages: the surface hardness is slightly lower after the putty is applied; Good mildew and moisture resistance, quick drying; The harmful residues have been greatly reduced.
It is necessary to avoid direct blowing of cold air.
Disadvantages: The surface hardness is slightly lower after putty is applied, and good effect can only be achieved with emulsion paint coating, and the drying time is long.
5.
The price of putty is different due to the different performance, labor and brand of putty.
It is very important to select high-quality putty first, which is an important prerequisite for applying putty well.
★ Base course repair After the concrete top plate and slab joints are cleaned, the gypsum putty shall be filled and compacted with steel scraper for the honeycomb and other large defects, and the horizontal plastering and vertical scraping shall be conducted once (the top surface with smooth surface may not be scraped).
Water solution of caustic soda for brushing: paint twice with caustic soda solution of 5% concentration, and paint once with caustic soda solution of 10% concentration.
Scraping big white putty: steel scraper shall be used to scrape putty back and forth.
Disadvantages: the phenomenon of delamination and peeling cannot be effectively solved, and it is not suitable to scrape too thick; Simple upgrading product of traditional putty; It is not suitable to purchase in rainy days.
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In addition, different putty shall be used for internal and external walls.
Therefore, the convex parts are required to be polished and leveled, and the concave parts should be filled and filled.
Pay attention to the joints between the upper, lower, left and right.
After the putty is dry, it shall be polished, smoothed and cleaned with sandpaper.
When scraping the wall, try to scrape it from left to right instead of up and down.
Cost price: 5~6.5 yuan/m2 for water-based putty.
★ Apply adhesive (slurry) before puttying, spray a layer of glue.
2.
Put a proper amount of water into the bucket according to the proportion, then pour a proper amount of putty powder into the bucket, and stir it with an electric drill.
★ The putty shall be applied twice, and the first layer of putty shall be dried before the second layer.
If the next step is carried out at this time, when heating in winter, the original wall materials that are not dry will start to evaporate, causing “dry cracks”.
● Cost price of 107 (or 801) traditional putty for building glue+Shuangfei powder: 3-5 yuan/m2 for traditional putty.
When the owner decorates the house, he should first consult the market about how much it costs to scrape putty per square meter, so as not to be spoiled by decoration.
