Thursday, January 26, 2017

Construction Technology of Application of Latex Coating on Concrete and Plastering Surface

Application of thin emulsion paint on concrete and plaster surface

1 range
    The process standards for industrial and civil construction of the indoor concrete surface and mud mortar, mixed mortar plaster surface coating thin emulsion coating project.
2 construction preparation
    2.1 Material requirements:
    2.1.1 Coatings: vinyl acetate latex paint. There should be product certification, factory date and instructions.
    2.1.2 Filling materials: large white powder, gypsum powder, talc, carboxymethyl cellulose, polyvinyl acetate emulsion, floor yellow, red soil child, black smoke, lithopone and so on.
    2.1.3 Pigments: colored organic or inorganic pigments, should be alkali, light resistance.
    2.2 The main equipment:
    2.2.l generally should be equipped with high stool, scaffolding, half-loaded vats, small oil drums, copper wire basket, rubber scraper, steel scraper, putty pallet, small shovel, surgery, putty groove, sandpaper, broom , Brushes, row pen, cloth, cotton and other silk.
    2.3 Operating conditions:
    2.3.1 wall should be basically dry, grass-roots moisture content of not more than 10%.
    2.3.2 plastering operations have been completed, the wall pipe, hole, yin and yang angle should be dealt with in advance, to ensure that the wall dry, all through the wall holes should be plastered in advance filled.
    2.3.3 windows and doors to complete the installation in advance.
    2.3.4 The ground has been completed (plastic floor, carpet, etc.), pipe installation is complete, try the water pressure test has been completed.
    2.3.5 large area before the construction of the model should be done in advance, after the relevant quality inspection and identification of qualified departments, the organization can organize large-scale construction team.
    2.3.6 winter construction indoor paint project should be carried out under the conditions of heating, room temperature to maintain a balance, the general indoor temperature is not straight below +10 ℃, relative humidity of 60%, not a sudden change. At the same time should be dedicated to test and switch doors and windows, in order to facilitate ventilation to exclude moisture.
3 operating process
    3.1 Process flow:
Grass-roots treatment → → putty putty putty → → apply the first thin emulsion paint coating →

Apply a second pass of the emulsion. Apply a third pass of the emulsion

    3.2 Basic treatment: First, the surface of the wall and other grass from the skin, loose and drums and other removal of chisel level, will remain in the grassroots surface of the dust, dirt, splashes and mortar flow marks and other debris cleared.
    3.3 repair putty: water gypsum wall and other grass-roots bumps on the pit concave, cracks and other sanctions over the flattening, after drying with a sandpaper will be polished flat, and the dust and other sweep.
    3.4 putty putty: the number of the number of putty putty can be determined by the grass-roots or the flatness of the wall, the general situation is three times, putty mix ratio for the weight, there are two, one for indoor putty, the mix ratio : Polyvinyl acetate emulsion (ie white latex): talcum powder or large white powder: 2% carboxymethyl cellulose solution = 1: 5: 3.5; the second is applicable to external walls, kitchen, toilet, bathroom putty, As follows: polyvinyl acetate emulsion: cement: water = 1: 5: 1. Do not use the wrong. Specific methods of operation are: the first time with a plastic squeegee full horizontal scraper, a scraper followed by a scraper, joints shall not stay Cha, each scratch
A scraper final closing, pay attention to the clean and neat. Dry with 1 sandpaper mill, the floating putty and stained polished polished, then clean the wall clean. The second time with a plastic squeegee full vertical scraping, the materials and methods used with the first time putty, dry sandpaper with a smooth and clean. The third time with plastic scrapers to find make-up putty, scraping with a steel scraping putty, the walls and other primary scraping flat scraping, drying with fine sandpaper polished polished, be careful not to wear or putty wear wear.
    3.5 application of the first thin emulsion coating: application sequence is to brush the top after the brush wall, brush the wall should be on the first after the next. First clean the wall, and then wipe the wall of cloth dust. Thin latex coating generally brushing with the brush, the use of new pen, pay attention to the activities of the pen and brush out. Thin emulsion paint should be used before mixing evenly, appropriate water dilution, to prevent the head over the coating application is not open. Dry after the compound putty, to be putty putty after drying with sandpaper polished, and clean.
    3.6 Application of the second thin emulsion coating: operating requirements with the first pass, to fully stir before use, if not very thick, not add water or add water as little as possible. To prevent the bottom. After the paint film is dried, use small sandpaper to polish the small lump of the wall and the row of hairs, and clean the surface after cleaning.
    3.7 Application of the third time emulsion thin coating: operating requirements with the second thin emulsion coating. As the latex paint drying faster, should be rapid and continuous operation, brushing from the beginning, gradually brushing to the other end, pay attention to the upper and lower brush each other convergence, after a row of pen next to the previous row of pen, to avoid drying Reconnect the connector.
4 quality standards
    4.1 Warranty items:
    4.1.1 Paint coating Engineering grade and material variety, color should meet the design requirements and the relevant standards.
    4.1.2 Paint and Coating Engineering is strictly prohibited peeling, leakage brush and through the end.
    4.2 Basic items, see Table 9-41.
Concrete and plaster surface application of emulsion thin coating basic items Table 9-41
Line Project Intermediate Coatings
1 through the end of the flow fall, wrinkled noodles without large, small surface at no obvious
2 bright and smooth bright and smooth uniform
3 decorative line, dichroic line straight deviation of not more than 1mm (pull 5m small line check, less than 5m pass line inspection)
4 colors, brush pattern color consistent, no obvious brush pattern

5 protection of finished products
    5.1 should be the first to clean up the surrounding environment, to prevent dust, affecting the quality of paint.
    5.2 When applying wall paint, do not pollute the ground, baseboard, balconies, windowsill, doors and windows and glass have been completed sub-sub-projects.
    5.3 The last time after the coating application, the indoor air to flow, to prevent the surface of the film dry or glossy lack of light.
    5.4 paint is dry before, should not clean the room floor, prevent dust and other stains on the wall paint.
    5.5 paint wall to be properly protected after the completion of, shall not bump pollution walls.
6 should pay attention to quality problems
    6.1 Coating Engineering substrate or substrate moisture content: concrete and plaster surface application of water and emulsion thin coating, the moisture content of not more than 10%.
    6.2 Putty used in coating engineering, should be solid and solid, not powder, skin and cracks. For exterior wall, kitchen, bathroom, toilet and other places where paint is needed and wood floor (floor) board surface, paint with water resistance should be used.
    6.3 through the end: the main reason is the thin film, so brush should be noted that in addition to pay attention to brush, but also to maintain the scheduling of the coating, not add too much water.
    6.4 then crouco obvious: brushing up and down when the brush, after a row of pen next to the previous row of pen, if the interval is slightly longer, it is easy to see the joints, so a large area of ​​application, should be equipped with adequate staff, it is good.
    6.5 brush pattern obvious: emulsion thin paint consistency should be moderate, the amount of pen dipped in paint to be appropriate, when brushing to prevent more than brushing pattern is too large.
    6.6 Separation of color lines: the construction should be carefully according to the elevation of good and good points to draw a good powder line, brush color separation line to select a good technology, experienced oil workers to operate, for example, to use the ruler, To uniform, ups and downs to be light, pen to dip the amount of appropriate scaffolding to pass the long erection, brush back and forth before and after.
    6.7 When painting colored paint, the ingredients should be suitable to ensure that each or every independent surface and each time with the same batch of paint, and should be used once, to ensure consistent color.
7 Quality records
    This process standard shall have the following quality records:
    7.1 various types of paint factory certification, construction instructions and so on.
    7.2 Sub-project quality checklist.

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