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Paint construction, when the paint match ratio, grass-roots walls and other improper treatment, you will encounter some common quality problems, you can read through this article to understand the causes of these quality problems and treatment methods.
Coating construction process
1, the wall requirements flat, dry (with more than 10 days maintenance period), no floating dust, grease and asphalt and other oil pollution, wall-based PH value <10, moisture content<10%, and the overall wall inspection, whether there is an empty drum phenomenon, and porous, rough surface repair and polishing, to ensure the overall effect of the wall.
2, special putty construction: to the wall substation treatment qualified, the use of Shanghai Ter special putty batch scraping two, putty batch scraping requirements uniform flat, drying after grinding
.
3, elastic special primer construction: after the completion of the above-mentioned work, the use of elastic special primer construction, roll coating, part of the brush again with the drain brush, to prevent leakage brush, enhance the wall and surface coating adhesion strength and waterproof function, primer dosing about 0.08Kg/m2.
4, elastic mid-lacquer construction: to the primer after drying (25 degrees C / 6 hours), the use of medium-lacquer for medium-coated construction. First with rollers on the wall evenly roll on the bone, and then with a special pull roller to create a uniform pattern can be, if the pattern is not very uniform, can roll a few more until even, to ensure the effect of fine pull flowers. However, the construction time should not be too long, otherwise pull out the pattern due to the dryness of the bone and affect the uniformity of the texture. The medium coating amount is about 0.6Kg/m2.
5, elastic latex paint construction: to pull flowers in the paint dry (25 degrees C / 48 hours), the use of multi-functional elastic latex paint for construction, construction using high-quality wool roller roll coating, the requirements of uniform coating film, to prevent roller marks. The surface is applied twice, and the surface is applied at 0.11Kg/m2.
6, tewing repair construction: after the construction, the bad wall in time to trim, the split line to sew, sewing requirements straight, to ensure that the overall beauty of the wall.
7, clean up the site, avoid polluting the walls.
Common paint construction quality disease and treatment methods
I, powder phenomenon
reasons:
1, grass-roots powder layer, oil pollution, etc.
2, low temperature when painting, bad film formation
3, painting water seepage too much
4, brush weather resistance difference
5, wall surface has not been treated
treatment method:
1, before painting should be loose surface of the old paint, dust, oil removal
2, construction temperature should be maintained at 5 degrees Celsius Above
3, reduce water seepage
4, coated with two layers of weather-resistant good paint
2, hanging phenomenon
reasons:
1, paint film thickness once coated too thick
2, painting when water Too much
3, the ambient humidity is too large
4, the lower lacquer is not polished, attachment difference
treatment method:
1, a few more paint, it is not appropriate to finish
2, reduce water seepage
3. , reduce environmental humidity, avoid excessive environmental humidity weather construction
4, polishing the surface of the coating
thred, color-changing hair flowers or pan-green phenomenon
reasons:
1, the grass-roots moisture content is too large
2, the grass-roots alkaline too large
3, construction Environmental chemical gas occurrence
treatment methods:
1, let the grass-roots completely air-dried
2, cement grass-roots drying to maintain for a period of time
3, strictly prohibited with polyurethane coatings at the same time construction, if used can first use sandpaper to lightly polish the wall, and then primer and finish.
4, color difference disease prevention measures
1, the whole batch of engineering raw materials procurement, sent staff stationed in the factory inspection materials into the construction site for re-inspection, pre-construction inspection, to ensure that the color is consistent, put an end to color difference;
2, strictly in accordance with the construction requirements of raw materials in the pre-construction even mixing, by a person responsible for timely mixing of even materials to the spraying staff
3, before the construction of the primer, the surface of the wall for flat treatment;
4, strictly control the construction process, prohibit different color coatings sprayed at the same time.
5, the technical measures of the sensory effect
1, to maintain the spray pressure and paint consistency constant, wind speed of more than 5-6% seconds, stop spraying construction;
2, before construction to strictly control the finished coating, in the face coating construction should be continuously uninterrupted;
3, maintain the appropriate spray distance, maintain the paint density moderate
;
how to minimize chroma, to ensure that the sprayed walls, the color remains extremely consistent, that is, from the human visual negligible. Specifically from the following six aspects to do:
, manufacturers to ensure the stability of raw materials of real stone paint. High-quality raw materials mainly refer to colored sand. The stability of the supply of color sand mainly depends on the support of color sand suppliers to the real stone paint manufacturers. A stable supply of colored sand is the key to the control of the color difference of real stone paint to a smaller level.
, improve the production capacity of real stone paint single cylinder. The greater the single cylinder capacity, the easier the color difference is to control. 20 tons of real stone paint, 1 and 2-3 production completed, color difference is certainly not the same. The chroma difference of 1 production is certainly smaller than that of 2-3 times. True stone paint with the same color number, the more batches produced, the greater the color difference.
, real stone paint construction scientific. The greater the order volume of real stone paint, the more difficult the color difference control will be. Like hundreds of tons of goods. Production batches are often up to several times. Say less 2-3 times. Small manufacturers have to reach 9-10 times, or more. Then in the construction project, it is necessary to ensure that each batch of real stone paint sprayed on the same wall, and reserved a barrel or half of the barrel for repair.
, the use of high-quality coating tools to avoid uneven brushing, thick and thin. Different kinds of products in strict accordance with the product's exclusive construction tools, can not appear different products share unified construction tools.
5, the same building, as far as possible at a time enough products, need different times batch supply, with the manufacturer to prepare color sand raw materials, reduce the color difference in the raw materials link.
, it is proposed to construct the same batch of materials with the same group of people to build on the same wall. The overall wall should be top-down, one breath into one go, to avoid intermittent construction caused by the new and old colors. Plane effects and hair effects produce sensory differences, noting that certain colors differ in backlight and positive light, direct sunlight, and refractive conditions.
of course, the construction environment is also necessary. Ensure that the wall temperature is between 5 and 40 degrees C during construction, the water content is ≤ 10%, and the air humidity ≤ 85%. Work according to the correct process.
.