Thursday, January 26, 2017

Application of Oil - based Coatings on Concrete and Plastering Surface

Application of Oily Coating on Concrete and Plastering Surface

1 range
    The process standards for industrial and civil construction of the indoor concrete surface and cement mortar, mixed mortar plaster surface application of oily coating project.
2 Construction Preparation:
    2.1 Material requirements:
    2.1.1 Paint: Varnish, clear oil, lead oil, all kinds of oil to reconcile the paint (ester to reconcile paint, phenolic reconcile paint, alkyd to reconcile paint, etc.), or color blending varnish, etc .; should have product certification, And the use of instructions.
    2.1.2 Filling materials: large white powder, talcum powder, gypsum powder, floor yellow, red clay, black smoke, lithopone, carboxymethyl cellulose, polyvinyl acetate emulsion.
    2.1.3 Diluent: gasoline, kerosene, pine, water, alcohol, alkyd thinner and other supporting materials with the corresponding thin paint.
    2.1.4 colored pigments should be alkali, light.
    2.2 Main Consolidation:
    2.2.1 General should be equipped with high stool, scaffolding, half vats, small oil drums, copper wire basket, rubber scraper, steel skin scraper, broom, putty groove, surgery, brush, pen, sandpaper, cotton , Cloth and so on.
    2.3 Operating conditions:
    2.3.1 wall must be dry, grass-roots moisture content of not more than 8%.
    2.3.2 wall equipment, pipe holes should be dealt with in advance, to ensure that the wall dry, all through the wall holes should be completed in advance plastering.
    2.3.3 doors and windows to be installed in advance glass.
    2.3.4 Large area construction should be preceded by a good model, the relevant quality inspection and identification of qualified departments, the organization can organize large-scale construction team.
    2.3.5 Construction environment should be well-ventilated, wet work has been completed and have a certain intensity, the environment is relatively dry.
    2.3.6 winter construction indoor paint coating project should be carried out under the conditions of heating, room temperature to maintain a balance, the general indoor temperature should not be less than +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 processing → → → putty putty put the first time over the full → putty putty putty → → second sub-sub-color line →

Brush the first paint → brush the second paint → brush the third paint → brush the fourth paint

    3.2 basic treatment: the walls of the ash and other debris should be cleaned up, with a broom to clean the walls and other floating soil.
    3.3 repair Putty: plaster putty will be wall, door and window corner damage such as bumps, linen, wind crack, cracks and other access Cha were looking for good, dry after the protrusion with sandpaper polished.
    3.4 The first time full of scraping putty: to be full of scraping putty again after the dry, with sandpaper to the wall of putty residue, stains and other polished, polished, and then clean the wall clean. Putty mix ratio of polyvinyl acetate emulsion (ie white latex): talc or large white powder: 2% carboxymethyl cellulose solution = 1: 5:35 (weight ratio). The above is suitable for indoor putty; such as kitchen, toilet, bathroom, etc. should be used outdoor engineering latex putty, this putty water resistance is better. (White emulsion): cement: water = 1: 5: 1 (weight ratio).
    3.5 The first time full of putty putty (applied advanced coating): putty mix and operation methods with the first pass the same putty. To be putty putty putty after drying in some places, individual large holes can be added gypsum putty, completely dry, with 1 sandpaper polished smooth, clean.
    3.6 Color separation line: If the wall has a dichroic line, paint should be applied before the spring line, first brushing light-colored paint, brushing after dark paint.
    3.7 Application of the first solvent-based thin coating: can be applied lead oil, it is a strong hiding paint, is the primer coating primer. Lead consistency of the oil to cover the bottom, do not flow, no significant brush marks is appropriate, the application of the order of each wall should be from top to bottom, from left to right, should not be applied chaos to avoid leakage or brushing too thick , Brushing unequal. After the first paint drying, the individual defective or leaky putty putty putty putty, to be putty in the sand after the grinding paper, the small lumps, wild putty residue, stains and other polished, polished, and clean.
    3.8 Application of the second solvent-based thin coating: the application method with the first coating (such as the wall for the intermediate coating, the Road can be applied lead oil; such as the wall for the high-level paint, this road can be applied to reconcile paint) , To be dry paint, fine sandpaper can be used to polish the wall smooth; clean clean, while wiping the wall with a tidal cloth again.
    3.9 Application of the third solvent-based thin coating: the use of paint to reconcile, such as the wall for the intermediate coating, this process can be used for the overcoat, the last one coating, the application of the order above. Due to harmonic paint viscosity, application should be more than brush management, in order to achieve film full, uniform thickness, do not flow does not fall.
    3.10 application of the fourth solvent-based thin coating: alkyd enamel paint, such as the wall for the high-level coating, this process known as the overcoat coating, the last one paint. Such as the last one to switch to the use of dull paint paint, the second can be changed to lead light tone paint, and other practices the same.
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 9-40.
                       Concrete and plaster surface of the basic items of thin coating Table 9-40
Project Intermediate Intermediate Coatings
Through the end of the flow fall, wrinkled noodles without large, small surface obvious no big, small surface are not
Bright, smooth (brushing matte paint does not check the light) Bright, smooth uniform light foot, smooth without stop feel
Decorative lines, dichroic line straight deviation of not more than 1mm straight
Color, brush pattern uniform color, brush pattern smooth color consistent, brushless pattern
    Note: The decorative line, dichroic line pull 5m line inspection, less than 5m pass line inspection.

5 protection of finished products
    5.1 should be the first to clean up before applying the surrounding environment, to prevent dust, affecting the quality of painting.
    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 After the last application of paint, 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 indoor ground, prevent dust and other stains on the wall paint.
    5.5 It is strictly forbidden to fire the wall that has already been applied, and do not bump the dirty wall.
6 should pay attention to quality problems
    6.l coating engineering substrate or substrate moisture content: concrete and plaster surface application of solvent-based coating, the moisture content of not more than 8%, the application of water and emulsion paint, the moisture content of not more than 10%; wood products moisture content Not more than 12%.
    6.2 Putty used in coating engineering, should be solid and solid, not powder, skin and cracks. Use of water-resistant putty should be used when the paint is to be applied to the exterior wall, kitchen, bathroom, toilet, etc., and to the surface of wood floor.
    6.3 Flow falling: the main reason is too thin paint, brushing too thick, the construction environment temperature is too low, the drying process is too slow, and the uneven wall or oil, water and other dirt. Control method is to select the appropriate diluent volatile, to strengthen the wall clean, brushing uniform and the construction environment temperature should be appropriate and so on.
    6.4 through the end: the main reason is not to brush the oil before mixing the paint evenly, the density of the filler sinking; thinner added too much to destroy the original paint consistency; base paint uneven or color caused. Control method is to strictly control the consistency of the coating, do not arbitrarily in the paint with thinner, base paint color should be lighter than the cross-coating.
    6.5 Backlight or lack of light: the main reason is the wall is not smooth, leaky putty or leaked sanding paper, paint quality or join too much diluent, the construction environment temperature is too low or too much humidity. Prevention and treatment is to strengthen the primary surface treatment, such as tired to scratch the thoughtful, attention to grinding paper work, the choice of qualified products, paint, construction is not free to join thinner, Process of paint, construction environment and temperature requirements.
    6.6 obvious cropping: the main reason is the paint drying too fast, or because the operating surface of a large oil shortage. Control is if the coating is oil-based paint, oil can be a little so that it does not dry too fast. But also pay attention to the construction workers should be equipped with foot, the construction surface should not be too large shop, the distance between people should not be too wide and so on.
7 Quality records
    The process standards should have to plant quality records:
    7.1 paint and other materials factory certification, construction instructions and so on.
    7.2 Sub-project quality checklist.

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