Coating knowledge: construction technology and acceptance standard of exterior wall coating

Core tip: the exterior wall decoration is like a protective coat on the residential bed, which has a protective effect on the wall At present, there are many materials for the wall decoration, such as paint, ceramic tile, etc today's small edition introduces the construction process and acceptance standard of the exterior wall paint: preparation for the construction of the exterior wall paint: 1 Requirements for the base material: the base plastering has been completed and maintained 20 In about days, the pH value of the base course is below 9, and the base course has been dried (at least 15 days), the humidity is lower than 8%; the base course surface is flat, the internal and external corners and corner lines are dense, and the outline is clear; the wall surface is free of structural problems such as water seepage, cracks, hollowing, blistering holes, etc No powder Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Paint Home News: the exterior wall decoration is like a protective coat for the residential bed, which has a protective effect on the wall At present, there are many materials for the wall decoration, such as paint, ceramic tile, etc today's small edition introduces the construction process and acceptance standard of the exterior wall paint: preparation for the construction of the exterior wall paint: 1 Base material requirements: the base plastering has been completed and maintained 20 In about days, the pH value of the base course is below 9, and the base course has been dried (at least 15 days), the humidity is lower than 8%; the base course surface is flat, the internal and external corners and corner lines are dense, and the outline is clear; the wall surface is free of structural problems such as water seepage, cracks, hollowing, blistering holes, etc No powdered loose matter, no oil, grease and other adherents 2 The joints reserved on the outer wall have been treated with waterproof and airtight treatment 3 The coating used has factory certificate, and at the same time, it has been tested to meet the requirements of relevant national standards 4 The coating used shall be approved by the owner, and the sample wall shall be approved by the owner, the supervisor and the designer 5 The decorative scaffold has been erected 6 The exposed iron parts of the base course have been provided with corresponding anti rust treatment Construction conditions of exterior wall coating: as the exterior wall coating is water-based, the requirements for construction and maintenance conditions are high The temperature required for construction and maintenance is higher than 5 ℃ and the ambient humidity is lower than 85% to ensure good film formation Low temperature will cause paint film pulverization, cracking and other problems Environmental humidity makes the paint film not dry for a long time, and eventually leads to poor film formation Weather factors must be considered in the construction of exterior wall Before painting, it does not rain for 12 hours to ensure the base is dry After painting, it cannot rain for 24 hours to prevent the paint film from being damaged by rain Construction process of exterior wall coating: repair of exterior wall - Cleaning - filling putty, partial puttying - grinding - pasting fiberglass cloth - puttying and re grinding - primer construction - first finishing coat construction - second finishing coat construction process of exterior wall coating: 1 Repair: before application, 1:3 cement mortar (or polymer cement mortar) shall be used for defects such as missing edges and corners, holes, etc of the substrate Repair 2 Cleaning: dust and powder can be washed with broom, brush and high-pressure water; grease - cleaned with neutral detergent; mortar - removed with shovel and scraper; mold - washed with high-pressure water outdoor, rinsed with clear water and dried 3 Putty filling and partial putty scraping: if the wall is flat and smooth, putty can not be used; in addition to being easy to be approved and polished, putty shall also have good strength and durability When filling and partial putty scraping are required, it is better to apply the putty thinly rather than thickly It is required that putty should have better adhesion, adhesion durability and water resistance 4 Grinding: grinding must be carried out after the base course or putty is dry, and wet grinding is not allowed to avoid the influence of adhering sandpaper on operation The thickness of sandpaper should be determined according to the hardness of the ground surface If the sandpaper is coarse, it will produce sand marks, which will affect the final decoration effect of the coating When grinding, first use a coarse abrasive cloth or a grinder, and then use a fine abrasive cloth to polish Pay attention to the flatness of the surface After grinding, remove the dust on the surface immediately to facilitate the construction of the next process 5 Paste fiberglass cloth: use mesh with uniform density, do not use too dense fiberglass cloth for paving 6 Puttying and regrinding: polymer puttying is used for leveling, which is mainly aimed at leveling the irregularities caused by sticking glass fiber cloth and preventing the capillary cracks on the surface 7 Coating application: the water content of the base course surface is required to be no more than 8% for coating application In case of strong wind, rain, fog and other weather, the surface coating shall not be applied; during construction, the sample wall shall be made according to the design requirements until the completion acceptance Acceptance standard for exterior wall coating construction: the exterior wall coating construction shall be free from leakage, bottom penetration, powder dropping, peeling, anti alkali, color biting, consistent color requirements, uniform density, sagging, pimple, brush lines and pollution of doors and windows Painting paint for exterior wall decoration is a common decoration method and relatively low decoration cost, so many people will choose paint to decorate the exterior wall The above is an introduction to the construction process and acceptance standard of exterior wall coating, hoping to help you [focus on WeChat official account "paint net"; pay attention to surprises, scan code to see if your husband is selling paint.. 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