What are the construction points of water in water and sand in water in summer? Material composition and function of each process 1
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Base treatment: repair the base, remove the dirt and dust on the surface of the base, etc
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2
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Primer: fill the gap, close the wall alkaline, improve the interlayer bonding, increase the adhesion to the base surface
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3
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Water in water multicolor coating: imitation stone main color layer, at the same time, it has elasticity to prevent wall cracking
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4
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Water based colorful coating: imitation stone modeling layer, you can create almost the same texture effect as the original stone
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5
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Cover coating: protect inner coating, with durability and anti ultraviolet function
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Base treatment 1
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Flatness inspection: use a 2m guiding rule to check the base surface first, and mark the obvious concave and convex parts with color pen
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2
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Patching: hollow parts need to be cut off, holes or obvious depressions need to be patched with cement mortar, and those that are not obvious need to be patched with putty
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3
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Sanding: use a grinder to grind the obvious protruding part and the repaired part to ≤ 2mm
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4
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Dust removal and cleaning: use brush and blade to remove wall adhesion and floating dust
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When the large-area wall is rectified, the pre-treatment of division should be done well
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For the metal rod protruding from the wall, derusting treatment should be carried out first to avoid polluting the surface in the future
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5
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Positioning and snapping line: according to the drawings or the requirements of Party A, the 2.0cm width of the dividing seam shall be positioned, and the 1.6cm width of the positioning line shall be popped out with ink line
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Brush primer 1
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Brush with brush or roller and apply evenly
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2
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Cross roll coating method is adopted to ensure no omission in construction and uniform coating
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3
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The coating construction must be carried out from top to bottom
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4
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If it does not meet the technical requirements, it shall be repaired
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5
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The primer coating must wait for drying (about 12 hours) before the next process
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Brush the middle coat 1
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The middle coat provides the main color of the final film
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2
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Coating can be sprayed or roll coated
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3
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Cross spray or cross roll coating method is adopted to ensure uniform coating and consistent color
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4
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The coating construction must be carried out from top to bottom
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5
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Repair that does not meet the technical requirements
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6
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After the first coating, the second coating shall be carried out according to the specified interval
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Spray water-based colorful paint 1
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No need to filter, avoid intense stirring, put the main material in the pressure tank to spray
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2
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The spraying method is adopted to make the main material layer uniform and the thickness consistent, adjust the air pressure to reach the control point size, pay attention to the air pressure in the tank, and control it at 0.05Mpa as far as possible
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3
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For one or more times of spraying, thin spraying can be carried out first and cross spraying can be carried out twice
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The spray gun should run at a uniform speed
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Generally, the spray nozzle is perpendicular to the spraying surface, and the spraying distance is 30-40cm
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4
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After spraying, it is necessary to wait for more than 24 hours, and the topcoat can be sprayed only after it is completely dry
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5
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Requirements: consistent color, no obvious sagging, leakage and bottom penetration
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6
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Color and grid separation should be pasted with adhesive tape, and the adhesive tape should be immediately removed at intervals
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After spraying, the adhesive tape should be immediately removed every small section to avoid damaging the paint film when it is taken out
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After the colorful coating is dried, the edge of the dividing line and other irregular residues shall be removed with a scraper to make the edges complete and straight
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Brush finish finish 1
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Spray with spray gun
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2
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Each spraying surface shall be completed at one time as far as possible, and the construction must be carried out from top to bottom of the building
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Each spraying shall be bounded by the natural dividing joint and the joint of internal and external corners
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If there is no dividing joint in a large range, the method of upper and lower connection shall be adopted, so as to avoid the appearance of paint joint trace as far as possible
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Other precautions 1
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Precautions for use of spraying tools 1
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Air pump pressure ≥ 8kg, air pump pressure tank pipe diameter ≥ pressure to spray gun pipe diameter, spray gun pipe diameter is 8 # – 12 #
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2
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The discharge pipe from pressure tank to spray gun should be less than 4m
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3
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Adjust the pressure of pressure tank to 0.5-1.5kg (no more than 1.5kg)
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4
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The pressure tank cover must be tightened with spanner, and no air leakage phenomenon shall be found during commissioning and inspection
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5
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The pressure tank, pipeline and spray gun should be cleaned every time they are finished
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If the spray gun needs to be stopped in the middle of spraying, the spray gun can be soaked in clean water to avoid blocking the nozzle due to dry and solid materials
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2、 Key points of water in water colorful coating construction: 1
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The material should be equal in two barrels and cannot be stirred with force
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2
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The discharge air pressure (the air pressure in the tank) is the same as the gun pressure (the air pressure is too small, the particles can not be opened, the pressure is too large, the particles are scattered, and craters are easy to appear after one-time spraying)
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3
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Move the gun steadily, stop the gun as little as possible, the gun should be perpendicular to the base surface, and oblique spraying is not allowed during spraying
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4
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According to the dividing line of the wall, it is better to spray the block of the groove joint, and take protective measures between blocks
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5
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When the scaffold is too close to the wall, pay attention to the uniform spraying speed to avoid the foot mark
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3、 Construction environment and other 1
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Water in water multicolor coating, no need to filter, avoid intense mixing, so as not to break particles, affect the coating effect
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2
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Construction temperature: must be higher than 5 ℃
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3
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Strictly speaking, when the wind force is above level 4, construction can not be carried out
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It is not allowed to carry out construction in rain
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Generally, it is not allowed to carry out construction even if there is rain within 4 hours
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4
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Do not mix other organic solvents when using, so as not to damage the coating composition
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5
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In the process of transportation, storage and use, colorful coatings should be protected from severe cold and sun exposure..
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