Substrate surface treatment:
1, base surface requirements
Cement mortar plastering, polishing and lighting. The external wall requires waterproofing. The flatness of the base surface shall meet the requirements of advanced plastering, the angle of yin and yang shall be square, the lines shall be straight, there shall be no hollowing, cracking, oil stain and corrosion, the moisture content of the base surface shall be 8%, and the PH value shall be 9. Exterior wall railings, window frames and pipes are installed, and the edges are closed.
2, cleaning and finishing
Remove laitance from the base surface, and smooth the higher joints and protruding points with a hand-held grinder to avoid blowing putty too thick.
Step 3 paste the mesh cloth
Stick anti-crack glass fiber grid cloth with diluted waterproof putty and flatten it with roller brush. Crack-resistant glass fiber mesh has good strength and toughness and contains viscose, and the overlap is not less than100 mm. The function of glass fiber mesh is to prevent the leveling putty from cracking too thick and buffer the stress caused by the possible cracking of plastering layer.
4, slit sealing
Pay-off and positioning According to the designed aluminum plate effect gridding diagram, use a cutting machine to cut the gridding joint (generally 10-25mm wide and 15-20mm deep), cut the joint on both sides, chisel out the mortar in the joint, clean it up, brush the interface agent, and then caulk the Babbitt flexible cement caulking material into a concave arc (formed by a small round bar with the diameter of the seam width) The function of framing joint is functional (it can prevent large-area plastering from cracking, and the caulking material is elastic and waterproof), decorative (it imitates the concave pattern of aluminum-plastic plate effect) and construction sealing (it is convenient for leveling and spraying). Frame joints should have the same radian, horizontal and vertical, and be controlled and checked by hanging wire hammer and horizontal line drawing. The block size should be appropriate, generally about 1-2.5 square meters per block, taking into account the facade effect and operational requirements.
5, coarse putty leveling
Scrape elastic waterproof coarse putty block by block according to the frame, and scrape a putty vertically and horizontally with an aluminum alloy ruler equal to the length and width of the block. The second putty shall be constructed after the first putty is dried. When scraping, two people should cooperate at the same time and apply force evenly. The lines should be straight and the angles of yin and yang should be square. The function of coarse putty is to level in blocks, and the flatter each block, the better. At the same time, try to control the thickness of putty to prevent cracking. Putty requires high bonding strength, good water resistance, good construction performance and no rolling. Two-component or one-component polymer cement putty is preferred.
6, fine batch scraping
Scrape a waterproof fine line vertically and horizontally in each batch. After drying, smooth it with a sander or sandpaper to remove floating ash. The function of the thin nipple is to fill the rough surface, make the base surface smoother and denser, and repair the frame joints in place. Polishing with 240-360 mesh water sandpaper. No need for sand marks and polishing.
7, polishing putty (also known as oily putty)
Scrape the base surface once or twice with very fine polishing putty. After drying, carefully polish it with water sandpaper of 600 mesh or more. No need to rub and sand marks, smooth to the touch. The function of polishing putty is to form a firm, delicate and dense putty layer, just like putty used for furniture painting, and the paint film is full when sprayed after polishing. Polishing putty can also prevent water and primer from infiltrating into the base and save paint consumption.
Construction technology of fluorocarbon paint;
A, fluorocarbon special sealing primer construction
1, function: seal the trace water at the bottom to prevent alkali corrosion.
2. Tools: air compressor, spray gun, scale, agitator, filter screen, etc.
3. Construction method, frequency and dosage Construction method: spraying. Nozzle size 1.5-2.0? The pressure is 0.2Mpa? Construction times: 1 time.
4. Construction method: (1)? Prepare the primer according to the proportion in the instruction manual, and fully mix it evenly without visible impurities. (2)? Before spraying, polish and clean the surface with water, and then spray after removing water. (3) When spraying, it should be sprayed thinly.
Second, the fluorocarbon finish construction
1, function: provide the surface feel of the coating and the weatherability and discoloration resistance of the coating.
2. Tools: air compressor, spray gun, scale, agitator, filter screen, etc.
3. Construction method, frequency and dosage Construction method: spraying. Nozzle size 1.5-2.0? The pressure is 0.2Mpa? Construction times: 2-3? everywhere
4. Construction method: (1)? Prepare the topcoat according to the proportion of the instruction, and fully mix it evenly. The specific dosage of special thinner without visible impurities is suitable for construction, and the mixing must be sufficiently uniform to make the pigment disperse evenly and react fully; Materials should be prepared now, and those that do not match must be covered; The prepared materials are used up within 8 hours, and the thickened materials cannot be used. (2)? The prepared materials should be aged for 30 minutes to make them fully react to achieve the best effect. (3)? Bo Tu spraying method should be adopted when the top coat is sprayed for the first time. (4)? The interval between the second topcoat spraying and the first topcoat spraying should not be less than 4 hours, and the thick coating spraying method should be adopted.
Third, fluorocarbon finish construction
1, function: provide stain resistance and discoloration resistance of metallic paint coating.
2. Tools: air compressor, spray gun, scale, agitator, filter screen, etc.
3. Construction method, times and dosage:? Spraying, nozzle size 1.5-2.0, pressure 0.2Mpa? Construction era:? 1 time
4. Construction method: Mix the low paint according to the proportion in the instruction manual, fully stir it evenly, and there is no visible impurity. The specific dosage of special diluent should be suitable for construction: fully stir evenly to make the pigment disperse evenly and react fully; Prepare materials now, and cover the unused materials; The prepared materials shall be kept for 8 hours at most, and the thickened materials shall not be used; Spray it thin.
Matters needing attention in fluorocarbon coating construction:
1, the construction temperature is 0-35℃, and the base surface temperature is preferably not lower than 5℃.
2, material storage should pay attention to moistureproof, waterproof, prevent direct sunlight.
3. The gloss is consistent, and sagging and missing coating are not allowed.
4, each component should not be too much, so as to avoid standing for too long, leading to solidification.
5, must use special auxiliary materials, water, banana oil, alcohol, gasoline, etc. Is strictly forbidden.
6. Humidity below 85%, temperature 0-35℃. Construction shall not be carried out under the following conditions: rain, snow, fog, frost, strong wind or relative humidity above 85%.
7. The paint film can be completely cured by brushing for about 7 days at room temperature. It is recommended not to use it in advance.
8. Safety measures and preventive methods: ensure good ventilation and wear protective equipment to prevent skin and eyes from being polluted. If the paint spills into your eyes, please rinse it with clear water immediately and seek medical attention in time. Fireworks are strictly prohibited in the construction environment.
Here is to introduce the construction technology of fluorocarbon paint. Fluorocarbon paint is more and more widely used in home. You should collect construction techniques well. For more decoration technical knowledge, please continue to pay attention to the decoration of Tuba Rabbit.
Tubatu Online provides you with "every decoration quotation, 1-4 local decoration companies, 3 sets of decoration design schemes" and the decoration pit avoidance strategy for free! Click this link:/Zhu Ye /zxbj-cszy.php? to8to _ from = SEO _ zhidao _ m _ jiare & amp； Wb, you can get it for free ~