The proportion of lotion is inappropriate and the content is too low.
Apply batch scraping and rolling coating in one aspect, and use the same process for the same finish.
The construction can be carried out after the base surface or putty layer is fully dry.
The distance between the nozzle and the finish is generally 30-40 cm, and the nozzle shall move at a uniform speed.
High quality coating and correct construction method shall be selected.
The real stone paint aggregate shall be covered immediately after it is dry.
The pressure shall be adjusted evenly.
Natural sand shall be used as far as possible, and the sand has a certain gradation.
The primary spraying is too thick and lacks ductility.
5.
The hardness of the back cover is too large.
The second construction shall be carried out after the first layer of material is completely dry.
Each process must be dry before the next construction.
The next construction shall be carried out after the first layer of material is completely dry.
The spray gun shall move at a uniform speed, and the wall surface shall be coated evenly.
If the coating is poor, carefully select the coating or add plasticizer.
If it is too thin, the initial viscosity of the sand on the wall is too low, which will cause the sand to fall.
3.
Each coating should be thin and not too thick.
It shall be diluted properly and uniformly.
Choose high-quality paint.
Carefully select a good coating for construction.
Cause: the first layer of coating film is not dry, and the second layer is sprayed immediately after one-time thick coating.
Whitening in water: after the coating is dry, it will turn white in water and become loose.
The distance between the spray gun and the finish is inconsistent.
11.
For the newly sprayed internal and external corners, use the thin spray multi-layer method, that is, spray again after the surface is dry.
Solution: the base treatment shall be flat and clean, and the coating or construction method shall not be correct.
Cracks in internal and external corners: cracks appear in the coating of internal and external corners during the spraying of real stone paint.
Cause of formation: if the two intersecting surfaces of the internal and external corners are sprayed with real stone paint, there will be two different directions of tension acting on the coating at the internal and external corners during the drying process, which is easy to crack.
Color difference (whitening and blooming): different color differences occur on the same finish.
Cause: the paint viscosity is too low, the dilution is too high, the spray gun stays at the same part for too long, the moisture content is too high, and the humidity is too high.
Solution: before use, conduct a small test on the same batch of materials with the same color, and then dilute the paint at the same elevation point after the color is the same.
Causes: the color of the coating is mixed, the mixing is not uniform before use, the batch scraping or spraying is improper, the coating is not dry after construction, and the raw materials are improperly selected in case of water intrusion.
The moisture content of the base layer is high.
The second layer of coating is too thick.
After moisture is removed and dried, materials for upper and lower layers shall be supplied to the supporting system.
Do not cover it after being drenched by rain.
1.
Both phenomena form linear, polygonal or indefinite cracks and fission.
Cause: improper lotion countermeasures: lotion with high adhesion and higher minimum film-forming temperature shall be selected, and the formula shall be adjusted.
sagging (sagging or sagging): the film is partially sagging or accumulated sagging.
8.
The construction shall not be carried out on the wall surface that is too wet.
The base surface of the non absorbent coating shall be dry.
6.
Countermeasures: select high-quality lotion and mix it correctly.
Only scattering, that is, spray two surfaces, so that the atomized edge material can be swept into the internal and external corners..
Coarseness of coating film: the surface of coating film is not clean, and there are particles with uneven dot distribution.
Cause: the water resistance of the coating is not good, which is caused by absorbing water.
Cause: the construction environment is unclean, with dust and sand mixed into the coating, sundries on the construction tools or when the film is not dry, sundries attached to the finish.
The first coat of material is not completely dry, continuous thick coating, and the spray gun construction pressure is uneven.
The bonding strength of putty is too low to ensure that the putty treatment layer is firmly attached without powder falling.
The spray gun should be far away, the movement speed should be fast, and the internal and external corners cannot be sprayed vertically.
9.
Solution: adjust the compatibility between coating systems, select appropriate amount of supporting materials for coating, and do not be too thick at one time.
Cause: the upper and lower coating systems are inconsistent, and the secondary construction shall be carried out before the bottom coating is dry.
Control the film thickness of each coat of paint.
bulge: the upper coating erodes the lower coating, resulting in poor expansion and adhesion.
Solution: adjust to proper viscosity.
After being exposed to the sun, it cannot restore its original color.
peeling: the film adhesion is poor, and the film will fall off after a little external force is applied.
If it has fallen to the surface, remove it with a blade, grind it flat, and spray and scrape it again.
Solution: the first layer of coating shall be fully dry before painting.
Too much sand falling: during construction, the paint is easy to fall off under arduous normal pressure.
The environment with wind or sand is not suitable for construction.
The adhesion between the primer and the finish is poor.
Cause: the surface to be coated is dirty, the coating property is poor, and the coating film is too thick each time.
Solution: after cleaning the surface to be coated, the bottom coating is not fully dry (base course or putty layer).
The construction shall be carried out after meeting the requirements.
10.
In that case, there will be water marks or flowers and white.
2.
The air pressure is generally 0.4-0.7mpa (4-7kg/c ㎡).
Select a special thickener and add an appropriate amount of silicone waterproof liquid to the real stone paint.
The coating is too soft: in good weather, the coating can still be pulled with nails after 72 hours.
Solution: adjust the appropriate paint viscosity, properly adjust the operation distance, and select high-quality paint.
Cause: when using sand with high hardness and compact and smooth surface, it is easy to drop sand.
The primer with strong adhesion and good wettability shall be selected for the smooth finish layer.
7.
The environment and tools are cleaned before construction, the base surface is uneven and smooth, and there is sand dust.
The proportion is unreasonable and the dilution is improper.
The paint color is uneven.
4.
The sand material is not graded properly.
If the coating is too thick, the construction is difficult.
Dilute it appropriately and mix it evenly before use.
Scaffolding Adjustable Base Jack
Before construction, pay attention to the construction environment and weather.
Countermeasures: if the internal and external corners with cracks are found, use the spray gun to spray thinly once and spray again every half an hour until the cracks are covered.
The film or finish is too smooth.
Pay attention to the matching of the primer and the finish.
causes of particle surface (sand particles are not required to adhere to the sprayed finish): the viscosity of the coating is too high, the distance from the surface to be coated is too far, the dust removal and cleaning treatment at the workplace are caused by the coating quality, and the coating environment is not clean.
Countermeasures: select the lotion with good quality and good hydrophobicity.
cracks and cracks: cracks often appear on the surface layer, and cracks often reach the lower coating or base layer.
If there is no difficulty in construction, increase the consistency of the coating as much as possible, which will help to solve the problem of sand falling.
