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    Home > Coatings News > Paints and Coatings Market > Detailed method of construction technology of rock chip real stone paint

    Detailed method of construction technology of rock chip real stone paint

    • Last Update: 2021-03-21
    • Source: Internet
    • Author: User
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    Rock chip paint is a unique environmental protection material for building exterior walls.
    It is made of silicone acrylic emulsion, special rock chips, natural stone powder and various imported additives through a special process.
    After spraying, it ensures that all base layers are attached with a perfect layer.
    The appearance of the granite slab is almost a messy surface effect.


    Rock chip paint has a strong texture, resembling granite appearance, good toughness, anti-cracking, high strength, collision resistance, never fade, no aging, flame retardant, heat resistance, good weather resistance, warranty for more than 15 years; good texture, Easy to shape, strong expressive force, high hardness, no discoloration, dirt resistance, good cleaning performance, water resistance, crack resistance and seepage resistance.

    Rock chip paint construction process:

    1.
    Preparation before construction 2.
    Base surface requirements 3.
    First batch of putty 4.
    Second batch of putty 5.
    Sanding 6.
    Apply black alkali-resistant sealing primer once 7.
    Apply black alkali-resistant sealing primer twice 8.
    Sticking and dividing the line tape modeling 9.
    Spraying rock chip paint 10.
    Flattening the paint film 11.
    Removing the tape 12.
    Polishing 13.
    Spraying finishing agent 14.
    Cleaning and hygiene


    1.
    Preparation before construction

    1.
    Submit to Party A or the general contractor the base layer requirements for composite rock chip paint coating
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    .

    2.
    Make a technical confession to Party A or the general contractor, and receive the split seam plan.

    3.
    Check the conditions of water, electricity, road and materials, and implement them.

    4.
    Obtain various rules and regulations for site management from Party A or the general contractor.

    5.
    According to the construction area and construction surface conditions, do a good job of planning and supplying construction quantitative materials.

    6.
    Implement specific division of labor, plans and various management systems, such as quality inspection, schedule, safety, etc.
    7.
    After entering the site, a professional construction technician will inspect the base surface.

    8.
    After the base surface inspection, carefully fill in the inspection report and submit it to the supervisor or the owner and the civil construction party for timely rectification of the unreachable parts.


    2.
    Base requirements

    For the newly built wall, it needs to be fully maintained and dried; for the old wall that has been stripped off by moisture, it needs to be re-grounded.

    The base surface should be smooth and clean, free of oil, floating dust or other contaminants.

    (3) Confirm whether the base surface strength, flatness, acidity and alkalinity, and moisture content meet the specified standards.
    If the wall moisture content is higher than 10% and the PH is higher than 10, the maintenance period should be extended.


    3.
    Common problems and treatment methods of the base surface --- batch putty

    (1) Treatment method for uneven wall surface: For uneven wall surfaces, first use Songshan brand flexible putty to make a full batch, and then use Songshan brand flexible putty to level it twice.

    (2) The yin and yang angles are not vertical: if the yin and yang angles are not straight or flat, first use a leveling putty to flatten them in large quantities.
    If they are serious, they must be mixed with cement and sand to repair them and then use putty to flatten them.
    Vertical, parallel

    (3) Treatment of joints and repair marks on the wall: use a mixture of cement and sand to repair, and then use putty to flatten them in large quantities.

    (4) After the putty is leveled, it is leveled again with sandpaper to ensure the beautiful wall surface and facilitate the paint application.

    Fourth, the construction process of the primer

    Method: roller coating method, construction tool-roller.

    1.
    Preparation before rolling:

    1) Remove foreign objects on the base and leave dust on the wall after sanding

    2) Water-based primer can be applied without adding water.
    If necessary, the paint can be diluted with about 10% of the volume of water and mixed well.
    Because the dark base primer is selected for this project, in order to ensure the coating effect of the project, it is forbidden to add water during construction.

    3) Procedures and requirements,

    Use a wool roller to evenly roll the Songshan brand water-based dark primer twice with a cross-rolling method.

    2.
    Common problems and solutions

    1) Uneven coating: repair the uneven coating.

    2) There are joints on the base surface and there are any traces after the primer is applied: the base surface should be repaired before applying the primer.

    3.
    Matters needing attention:

    1) During the primer construction, the wall temperature is not less than 10℃, the wall moisture content is less than 10%, and the air humidity is less than 80%

    2) Strive to be uniform when coating.

    2) Those that do not meet the technical requirements shall be repaired.

    3) Construction is not allowed when the temperature is below 5.

    5.
    The production of shaping (joining):

    Tools and materials: textured paper, elastic thread, ruler, color pen

    Production process and requirements:

    1.
    According to the requirements of Party A, the division of the project is 60×120, and the line width is 12 mm.

    2.
    According to the design of the joint size, select the width of the textured paper

    3.
    According to the design pattern, the divided seam ink line will be popped up on the wall.

    4.
    Cover the area inside the division line with paper tape.
    Pull the wire on the same wall and bounce it straight.

    5.
    Matters needing attention:

    1) If you don't need jointing, you don't need to do this process.

    2) The size of the joints should be coordinated and the lines should be vertical.


    Six, the construction of rock chip paint

    Method: spraying method.
    Construction tools: air compressor, special spray gun for rock chip paint, ash shovel

    1.
    Preparation before spraying:

    1) Check whether the primer spraying and jointing meet the requirements.

    2) Pour the rock chip paint that has been stored for a period of time into the mixing bucket and mix it evenly with a mixer.

    3) Protect the surrounding facilities (doors, windows, guardrails, etc.
    ) that need to be sprayed with old newspaper or tape to prevent damage during spraying.


    2.
    Spraying procedures and requirements:

    1) That is, the special spray gun is used for construction, and the air pressure of the air compressor must be above 8KG.

    2) Keep the nozzle of the spray gun perpendicular to the spraying surface, the spraying distance should be about 30-40cm, and the spray gun running at a certain speed, spray with the cross spray method.

    3) Finished at one time during spraying.
    The total thickness of the finished rock chip paint is 2mm~3mm, and the floating point is required to be uniform and the color is consistent.


    3.
    Matters needing attention:

    1) The weather is below 5 degrees Celsius, and the wind power is above 4 cannot be used for construction.

    2) The rock chip paint can be sprayed 12 hours after the primer is sprayed

    3) To use a special spray gun for rock chip paint, the air pressure is controlled at 8 kg/cm²,

    4) The wall temperature is above 10 degrees Celsius, and the air humidity is less than 80%


    4.
    Common problems and solutions:

    1) Yin and Yang angle cracks: During the spraying process of rock chip paint, sometimes cracks appear at the Yin and Yang corners.
    Because the Yin and Yang angles are the junction of two sides, if the rock chip paint is sprayed, there will be two tensions in different directions during the drying process.
    The coating film at the yin and yang corners is easy to crack.
    On-site solution: find the yin and yang corners of the cracks, use the spray gun to spray again thinly, and spray again every half an hour until the cracks are covered; for the newly sprayed yin and yang corners, pay special attention to not spraying thickly at one time when spraying.
    Use the thin spray multi-layer method, that is, re-spray after the surface is dry.
    The spray gun should be far away, the moving speed should be fast, and the spray can not be perpendicular to the yin and yang angles.
    Only scattering, that is, spraying on two surfaces, let the edge of the fog sweep into the yin and yang angle.

    2) Cracks on the plane: The main reason may be due to the large temperature difference in the weather and the sudden cold, which causes the inner and outer layers to dry at different speeds.
    The surface does not dry and the inside does not dry to form cracks.
    The on-site solution is to use a small nozzle spray gun and spray multiple layers.
    Try to control the drying speed of each layer, and the spraying distance is better.

    3) Cracks during film formation: During spraying, the coverage is not uniform or too thick, and cracks appear on the surface of the coating after film formation.

    4) Too much sand is lost during spraying: Some rock chip paints lose a lot of sand during spraying.
    In severe cases, it can reach about 1/3, causing waste.
    Therefore, during construction, pay attention to the air pressure of the spray gun not to be too large, and the speed of the spray gun not to move too fast.
    Just adjust the air pressure to a suitable position and master the speed of the spray gun when spraying.
    In addition, this paint is forbidden to be diluted with water.

    Seven, the paint surface is flattened

    Construction tool: bare body roller

    1.
    Production process and requirements: After the rock chip paint is sprayed, when the paint film reaches 60% or 70% of the dryness, it is advisable to lightly press it with a bare roller until the surface is smooth.

    2.
    Matters needing attention

    1) When the roller presses the paint surface, the applied force is even, so that the paint surface is smooth and the texture is balanced.

    2) Pay attention to the saturation of the surrounding paint after the rock fragments with larger particles are pressed, and there must be no gaps


    8.
    Remove the tape

    Construction tools: manual operation, utility knife

    1.
    After spraying and flattening, the adhesive tape should be torn off every small section.

    2.
    After the rock chip paint is sprayed and flattened, use a spatula to remove the rock chip paint on the line, and make the corners of 90 degrees as the standard, and be careful not to damage the grooves and treat them into an angular shape.


    Nine, polish the wall

    Construction tools: sanding knife, sanding paper

    1.
    The paint film is flattened with a bare roller to remove the tape, and it can be polished after it is dried for 24 hours.
    The drying time can be appropriately extended with temperature changes.

    2.
    Precautions: Use 400-600 grit sandpaper to gently smooth the raised sand particles on the surface of the rock chip paint.
    Be careful not to apply too much force, otherwise it will damage the paint film and cause the bottom to loosen.
    In severe cases, it will cause poor adhesion and the paint film will fall off.


    10.
    Finish paint construction

    Method: Roll coating method.
    Construction tools-rollers,

    1.
    Preparation before rolling:

    1) Check if the rock chip paint is dry

    2) Remove foreign matter on the rock chip paint

    3) Prepare paint and tools

    2.
    Procedures and requirements,

    1) Use the wool roll hole to apply the cross-rolling method of the Songshan brand finish paint twice evenly.

    2) Thickness: 30 microns 0.
    15KG/㎡

    3.
    Common problems and solutions

    1) Uneven coating: repair the uneven coating.

    2) The damaged area of ​​rock chip paint should be repaired and then painted with clear varnish.

    4.
    Matters needing attention:

    1) During the top coat construction, the wall temperature should not be less than 10℃, the wall moisture content should be less than 10%, and the air humidity should be less than 80%

    2) When rolling the top coat, it should be done after the rock chip paint is completely dried.

    3) The coating should be uniform, and if it does not meet the technical requirements, it should be repaired.

    4) Construction is not allowed when the temperature is below 5.


    11.
    Cleanup, acceptance

    After all the working procedures of the project are completed, a final inspection should be done, and the imperfect, contaminated, and damaged areas should be repaired, and the site should be cleaned up and ready to be handed over for acceptance.



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