1, really stone paint construction countermeasures
Really stone paint, unlike ordinary exterior wall coating, have many unique properties, such as the weight of a person, thin film deposition and drying time is long, etc., therefore in the construction need to control in several ways.
1.1 construction matters needing attention
(1) to ensure the integrity of the coating and the overall quality, bottom coating, the main coating and coating shall be the products of the same production enterprises.
(2) should be avoided at the temperature below 5 'C, relative humidity higher than 85% under the environmental conditions of construction: can't construction in windy weather, in order to avoid the main coating material speak too fast and cracking.
(3) due to xu material dry coal for a long time, should pay close attention to the weather forecast at any time, do a good job in construction deployment, avoid the construction before the arrival of rain and snow.
(4) the same face, the same color should be used in the same batch of coating construction, when the same color batch number at the same time, not be mixed stir well in advance to ensure that the same metope does not produce off color.
(5) the exterior wall coating should be carried out by building a top-down construction, construction section should with metope frame joint, Yin and Yang Angle or downspouts for dividing line.
1.2 construction step basic level processing - spray primer 2 times - draw chalk line - line belt - really stone paint spraying (main) coating 2 times - to tear lines take - clear the jointing and find sewing seam tracing - 1-2 times - spraying spraying oil lines primer finish 2 times.
1.3 the main construction technology
1.3.1 handling at the grass-roots level Remove dust and other adhesion of basic level surface in the first place. Will bulge portion of smoothed: empty drum after part should be cut in addition to the plaster and leave to dry. Joint dislocation and the larger sag with polymer cement mortar filling-in: eliminating coating of steel, wood, etc., to fill the hole with mortar: with the shovel steel wire brush to remove surface laitance and loose powder part, with cement putty flat: remove the surface of the mold release agent, oil stains: use latex cement pits, holes, cracks on the surface of the putty to repair. Metope whiskering frosting application in weak acid scrubbing solution. Rinse off with clear water and then; Or the use of alkali resistant sealer do back processing, prevent precipitation alkaline substances. Wooden base sand wood wool should be flat.
1.3.2 priming paint bottom coating should be chosen and the main coating analogous colors. First will stir well bottom coating, such as the coating thicker. Can be diluted, according to the product manual with uniform roller roller coating, shall not leak brush, also don't thick coating, specific use most shall be determined according to the roughness at the grass-roots level.
1.3.3 spraying really stone paint coating The main coating after mix into special spray gun, start the air compressor, the spraying pressure control in 4 to 6 kg/cm2, nozzle diameter is usually 6-8 nun, spray gun and metope of distance control in 30 to 40 cm, should keep the gun and metope vertical when spraying. Open spray gun, top-down uniform coating 2 times. According to the requirements of adornment effect. Can stay really stone paint film table dry gently with embossing roller from the top to roll again, in order to obtain the effect of the granite texture.
1.3.4 spray transparent cover face paint For main coating completely dry (usually in 5-7 days) after coating finish coating. Will finish coating product specifications according to the proportion of rare sample and stir well. Can use roller coating or coating. If use roller coating. With a roller on the dip coating and distributed evenly on the uniform material board, and then roller coating on the coating, usually need to apply twice. If the gravity gun spraying, basically with the coating operation method. Due to spray evenly, and generally does not produce leakage besmear, recommended spraying construction.
2 quality accident analysis
In really stone paint application process, due to reasons such as construction and the product itself, often there will be some quality accidents, most directly affect the decorative effect, and even affect the durability of buildings and normal use, common quality accidents are as follows:
2.1 the water white
The reason is:
First, and the preparation of really stone paint chooses the emulsion has a lot to do. Some emulsion manufacturers to increase the stability of the emulsion, the excess of surfactant, the presence of these surfactants can greatly reduce the resistance to water of emulsion itself.
Second, really stone paint manufacturers in order to save costs, just add a small amount of the emulsion, which really stone paint dry film loose, dense enough, the bibulous rate of paint film is larger, and the bond strength is low, once encounter rainy weather for a long period of time, the rain will gradually penetrate into the paint film, really stone paint film white.
Third, some really stone paint manufacturers to join a lot of light in preparation of methyl cellulose, such as current ethyl cellulose thickener, and these substances are water-soluble or hydrophilic, really stone paint film after in coating, reduce the water resistance of the coating.
2.2 spraying spraying, sand
First, may really stone paint cuhk ran a mismatched gravel particles, really stone paint consistency is not reasonable; Second may cause for construction, such as gun diameter is too large, gun improper selection pressure, etc.;
2.3 hair flower really stone paint
For reasons that cause the whiskering phenomenon, ph greater than 9 at the grass-roots level, using inferior cement mortar, the ratio of cement mortar
No or short curing period; In construction of really stone paint thickness unevenness, really stone paint with the too little, too thin: really stone paint production cellulose proportion is too large, and so on.
2.4 yellowing really stone paint
The main reasons that cause the emulsion in really stone paint has the most problems. Poor in some really stone QiChang acrylic emulsion as binder, such as ultraviolet light can cause analysis of the emulsion, precipitation non-ferrous material, eventually cause yellowing phenomenon.
2.5 paint film is too soft
The main reason for improper selection emulsion or emulsion containing the most low, cause film film coating is not quite close together.
2.6 covering power
For reasons that cause the coating failed to stir well, allowing water paint mixing water is too large or besmear brushs uneven.
2.7 the color difference
The reasons for the uneven coating, thickness is differ, not according to the requirement to the water, not stir fully or not to use the same batch coating caused by:
2.8 take off the powder
Reason for allowing water paint mixing water is too large, construction temperature below 5 ℃ or in the rain:
2.9 peeling off
For reasons that cause the construction temperature below 5 ℃ or degeneration at the grass-roots level, have float ash, oil pollution caused by impurity such as:
2.10 shrinkage cavity
Reasons for grassroots have oil, mixed with oil in the coating class or rain construction.
2.11 the coating cracking
Reasons for cracking at the grass-roots level: the most is too large, a spraying coating is too thick, the basic unit is not divided into pieces, or frame is too big, thick coating, and improper dilution: coating defects in itself performance, etc.
3 conclusion
Really stone paint to achieve the ideal decorative effect, from material production to the construction site construction production, each link must be strictly controlled. Combined with engineering practice experience, through the external walls really stone paint quality accident causes were analyzed. To provide a basis for the corresponding improvement measures, at the same time to improve the construction quality of really stone paint and further popularization and application has a certain reference value.
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