A construction method for repairing the original appearance of a water-washed stone outer finish

Abstract

This invention relates to a method for restoring the original appearance of a pebble-dash exterior cladding. The method involves acquiring an image of the pebble-dash exterior cladding to be repaired and identifying the area to be repaired. Key stylistic features are determined based on the pebble-dash exterior cladding, and a stylistic layout reference image is generated. A small sample is made based on the stylistic layout reference image to determine the closest stone particle ratio. A physical repair template is then made based on the determined stone particle ratio, and the overall appearance of the repaired pebble-dash exterior cladding is checked for uniformity. After the template is approved, the repair work can proceed. After restoration using this method, because the pebble-dash surface material has undergone template creation and image comparison, color and texture differences between the old and new areas can be effectively avoided, preserving the original material feel of the building and adhering to the principle of "restoring the old as it was."

Description

Technical Field

[0001] This invention relates to a method for repairing pebble-dash exterior finishes, specifically a method for restoring the original appearance of pebble-dash exterior finishes. Background Technology

[0002] In some historical and industrial buildings, pebble-dash facades are often used. However, due to long-term environmental impacts and human damage, the pebble-dash facades of these buildings will suffer varying degrees of damage.

[0003] In subsequent projects involving the preservation of historical buildings, industrial relics, and urban renewal, the restoration of pebble-dash facades is frequently encountered. However, current restoration practices often result in noticeable color and texture differences between the old and new areas, disrupting the historical continuity and unity of the facade. For the sake of simplicity, some projects use imitation stone paint, real stone paint, or prefabricated panels to cover the original pebble-dash. This method completely alters the building's original material texture, violating the principle of "restoring the old as it was."

[0004] Therefore, there is an urgent need for a construction method that can restore the original appearance of the pebble-dash exterior. Summary of the Invention

[0005] The purpose of this invention is to provide a method for restoring the original appearance of pebble-dash exterior finishes, so as to solve the problem of significant color and texture differences between old and new areas in existing pebble-dash exterior finish restoration construction.

[0006] This invention is implemented as follows: a construction method for restoring the original appearance of pebble-dash exterior finishes, comprising the following steps: a. Image acquisition of the pebble-dash exterior finish to be repaired; b. Define the area to be repaired; c. Based on the area outside the area to be repaired in the image of the pebble-dash exterior surface to be repaired, analyze and determine the key landscape feature parameters of the pebble-dash exterior surface; d. Generate a landscape layout reference map based on key landscape feature parameters, and determine the key landscape feature parameters of the area to be repaired for the pebble-dash exterior surface; e. Based on the landscape layout reference, small samples are made. Multiple samples are obtained by mixing stone particles of various sizes and colors in different proportions. Each sample is compared with the original landscape of the pebble-dash exterior surface to be repaired to obtain the closest stone particle ratio. f. According to the proportions and subsequent processes determined in step e, make a physical repair sample and conduct acceptance testing; g. Remove the surface material from the area to be repaired to expose the building's base layer; h. Prepare the pebble-dash surface material according to the proportions determined in step e, apply the pebble-dash surface material to the area to be repaired and smooth the surface; i. After the pebble-dash surface material has initially set, wipe the surface of the pebble-dash surface material until the cement slurry is carried out, so that the stone particles are evenly exposed. j. Rinse the surface of the stone surface material evenly with water to expose clear stone particles; k. Maintain the pebble-dash surface material.

[0007] Furthermore, in step a, three-dimensional laser scanning or high-precision photography technology is used to acquire precise point cloud image data or high-resolution image data of the pebble-dash exterior surface to be repaired.

[0008] Furthermore, in step b, the repaired pebble-dash exterior surface is divided into grids, and the grids containing defects are identified as the areas to be repaired; in step f, a solid repair template with the same size as a single grid is created.

[0009] Furthermore, in step c, the key landscape feature parameters include the average particle size, particle size distribution, main color tone, color composition, particle distribution density, and texture direction.

[0010] Furthermore, in step f, an image of the physical repair template is obtained. In the image of the pebble-dash exterior surface to be repaired obtained in step a, the image of the physical repair template is used to cover and fill the area to be repaired to determine whether the overall appearance of the pebble-dash exterior surface is uniform after repair.

[0011] Furthermore, step g also includes base layer repair and treatment: checking the original base layer for hollowness, cracks, and strength, removing the hollow and loose parts of the base layer, performing pressure grouting on the cracks in the base layer, cleaning the base layer with a high-pressure water gun, and roughening the surface.

[0012] Furthermore, in step i, the stone particles are made to uniformly expose 1 / 3 to 1 / 2 of their particle size.

[0013] Furthermore, in step d, the area to be repaired is filled in manually or using AI tools based on key landscape feature parameters.

[0014] Furthermore, in step e, the image of the sample is compared with the images of each area to be repaired in the landscape layout reference image to determine the sample with the closest landscape.

[0015] Furthermore, in step e, if there is a significant difference between the appearance of the closest sample and the corresponding area of ​​the appearance layout reference image, the stone particle ratio of the closest sample is finely adjusted until there is no significant difference between the appearance of the sample and the corresponding area of ​​the appearance layout reference image.

[0016] In this invention, an image of the pebble-dash exterior surface to be repaired is acquired and the area to be repaired is determined. Key landscape feature parameters are determined based on the pebble-dash exterior surface to be repaired, and a landscape layout reference image is generated. A small sample is made based on the landscape layout reference image, and the closest stone particle ratio is determined. A physical repair template is made based on the determined stone particle ratio, and it is determined whether the overall landscape of the pebble-dash exterior surface is uniform after repair. After the template is accepted, the repair construction of the pebble-dash exterior surface can be carried out.

[0017] After restoration using the original appearance restoration construction method of the water-brushed stone exterior surface of this invention, the water-brushed stone surface material used has been sampled and compared with images, which can effectively avoid color difference and texture difference between the old and new areas, preserve the original material texture of the building, and follow the protection principle of "restoring the old as before". Attached Figure Description

[0018] Figure 1 This is a flowchart of the present invention. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] like Figure 1 As shown, the construction method for restoring the original appearance of the pebble-dash exterior surface of the present invention specifically includes the following steps.

[0022] a. Image acquisition of the pebble-dash exterior finish to be repaired.

[0023] Specifically, 3D laser scanning or high-precision photography can be used to acquire precise point cloud image data or high-resolution image data of the pebble-dash exterior surface to be repaired. The acquired point cloud image data is then converted into a 3D model and processed in BIM software. Similarly, the acquired image data is processed in image processing software.

[0024] b. Define the area to be repaired.

[0025] In the acquired images of the pebble-dash exterior surface to be repaired, the surface is divided into grids, and square grid areas containing defects such as surface peeling and cracking are identified as the areas to be repaired.

[0026] c. Based on the areas outside the area to be repaired in the image of the pebble-dash exterior surface to be repaired, analyze and determine the key landscape feature parameters of the pebble-dash exterior surface.

[0027] Key landscape feature parameters include average particle size, particle size distribution, main color tone, color composition, particle distribution density, and texture direction.

[0028] d. Generate a landscape layout reference map based on key landscape feature parameters, and determine the key landscape feature parameters of the area to be repaired for the pebble-dash exterior surface.

[0029] For the acquired images of the pebble-dash exterior finish to be repaired, the area to be repaired is filled in manually or using AI tools (such as Midjourney, Stable Diffusion, etc.) based on key landscape feature parameters. A landscape layout reference map is generated, which clarifies the overall color tendency, stone density and rhythm, and other visual objectives of the repaired wall surface.

[0030] e. Based on the landscape layout reference, small samples are made. Multiple samples are obtained by mixing stone particles of various sizes and colors in different proportions. Each sample is compared with the original landscape of the pebble-dash exterior surface to be repaired to obtain the closest stone particle ratio.

[0031] The same method as in step a is used to obtain images of small samples. The images of small samples are compared with the images of each area to be repaired in the landscape layout reference diagram. The small sample that is closest to the landscape of each area to be repaired is determined, thereby determining the stone particle ratio corresponding to the area to be repaired.

[0032] If there is a significant difference between the appearance of the closest sample and the corresponding area in the landscape layout reference image, make minor adjustments based on the stone particle ratio of the closest sample until there is no significant difference between the appearance of the sample and the corresponding area in the landscape layout reference image.

[0033] The proportion of different particle sizes and colors of stone particles will affect the final appearance of the pebble-dash surface. The specific process of making a sample is as follows: fill the sample template with a specific proportion of pebble-dash surface material. After the pebble-dash surface material has initially set (there is no indentation when you press it with your finger but there is a fingerprint), wipe the surface of the pebble-dash surface material until the cement slurry is brought out, so that the stone particles are evenly exposed. Then rinse the surface of the pebble-dash surface material evenly to reveal clear stone particles.

[0034] f. According to the proportions and subsequent processes determined in step e, produce a physical repair sample and conduct acceptance testing.

[0035] The size of the solid repair template is generally the same as that of a single mesh to facilitate filling comparison.

[0036] Images of the physical repair template are obtained using the same method as in step a. The image of the physical repair template is used to cover and fill the area to be repaired in the image of the pebble-dash exterior obtained in step a, to determine whether the overall appearance of the pebble-dash exterior is uniform after repair. A joint acceptance inspection is conducted based on aspects such as color, texture, stone grain visibility, and overall uniformity. The template that passes the inspection serves as the sole physical standard for subsequent construction.

[0037] The specific process of making a physical repair template is as follows: fill the physical repair template with a specific ratio of water-brushed stone surface material. After the water-brushed stone surface material has initially set (there is no indentation when lightly pressed with a finger but there is a fingerprint), wipe the surface of the water-brushed stone surface material until the cement slurry is brought out, so that the stone particles are evenly exposed. Then, rinse the surface of the water-brushed stone surface material evenly to expose clear stone particles.

[0038] g. Remove the surface material from the area to be repaired to expose the building's base layer.

[0039] After the building's base layer is exposed, further repair and treatment work on the base layer is required.

[0040] The specific steps are as follows: check the original base layer for hollowness, cracks, and strength; remove the hollow and loose parts of the base layer; perform pressure grouting on the cracks in the base layer; then clean the base layer with a high-pressure water gun and roughen it.

[0041] h. Prepare the pebble-dash surface material according to the proportions determined in step e, apply the pebble-dash surface material to the area to be repaired, and smooth the surface.

[0042] Apply the wet material of the pebble-dash surface layer to the base layer in layers, with each layer controlled to be 12-15mm thick. Use a trowel to compact and smooth the material, ensuring that the stone particles are evenly distributed without large areas of accumulation or missing pieces.

[0043] i. After the pebble-dash surface material has initially set (when lightly pressed with a finger, it leaves a fingerprint but no indentation), use a uniform-sized, medium-density natural sponge to soak it thoroughly and squeeze it until it is semi-dry. Wipe the surface with a fixed pressure and a fixed circular motion until the cement slurry is carried away and the stone particles are evenly exposed, revealing about 1 / 3 to 1 / 2 of their particle size.

[0044] j. Then, use a fine mist sprayer or low-pressure water gun to evenly rinse away any remaining cement slurry on the surface, revealing clear aggregate particles. This process needs to be continuous to avoid areas where the mortar is too hard to rinse.

[0045] k. Maintain the pebble-dash surface material.

[0046] After construction, use a spray to maintain humidity and avoid direct sunlight and wind. The curing period should be no less than 7 days. During the curing period and in subsequent projects, the finished product should be effectively covered and protected to prevent contamination and impact.

[0047] This invention acquires images of the pebble-dash exterior surface to be repaired and identifies the area to be repaired. Based on the pebble-dash exterior surface, it determines key stylistic features and generates a stylistic layout reference image. A small sample is made based on the stylistic layout reference image to determine the closest stone particle ratio. A physical repair template is then made based on the determined stone particle ratio, and the overall stylistic uniformity of the repaired pebble-dash exterior surface is verified. After template acceptance, the repair work can proceed. After repair using this invention's method for restoring the original appearance of pebble-dash exterior surfaces, the use of pebble-dash surface materials, through template creation and image stylistic comparison, effectively avoids color and texture differences between old and new areas, preserving the original material feel of the building and adhering to the principle of "restoring the old as it was."

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for restoring the original appearance of pebble-dash exterior finish, characterized in that, Includes the following steps: a. Image acquisition of the pebble-dash exterior finish to be repaired; b. Define the area to be repaired; c. Based on the area outside the area to be repaired in the image of the pebble-dash exterior surface to be repaired, analyze and determine the key landscape feature parameters of the pebble-dash exterior surface; d. Generate a landscape layout reference map based on key landscape feature parameters, and determine the key landscape feature parameters of the area to be repaired for the pebble-dash exterior surface; e. Based on the landscape layout reference, small samples are made. Multiple samples are obtained by mixing stone particles of various sizes and colors in different proportions. Each sample is compared with the original landscape of the pebble-dash exterior surface to be repaired to obtain the closest stone particle ratio. f. According to the proportions and subsequent processes determined in step e, make a physical repair sample and conduct acceptance testing; g. Remove the surface material from the area to be repaired to expose the building's base layer; h. Prepare the pebble-dash surface material according to the proportions determined in step e, apply the pebble-dash surface material to the area to be repaired and smooth the surface; i. After the pebble-dash surface material has initially set, wipe the surface of the pebble-dash surface material until the cement slurry is carried out, so that the stone particles are evenly exposed. j. Rinse the surface of the stone surface material evenly with water to expose clear stone particles; k. Maintain the pebble-dash surface material.

2. The method for restoring the original appearance of plywood exterior finish according to claim 1, characterized in that, In step a, three-dimensional laser scanning or high-precision photography technology is used to acquire precise point cloud image data or high-resolution image data of the pebble-dash exterior surface to be repaired.

3. The method for restoring the original appearance of plywood exterior finish according to claim 1, characterized in that, In step b, the pebble-dash exterior surface is divided into grids, and the grids containing defects are identified as the areas to be repaired; in step f, a solid repair template with the same size as a single grid is created.

4. The method for restoring the original appearance of plywood exterior finish according to claim 1, characterized in that, In step c, the key landscape feature parameters include the average particle size, particle size distribution, main color tone, color composition, particle distribution density, and texture direction.

5. The method for restoring the original appearance of plywood exterior finish according to claim 1, characterized in that, In step f, an image of the physical repair template is obtained. In the image of the pebble-dash exterior surface to be repaired obtained in step a, the image of the physical repair template is used to cover and fill the area to be repaired to determine whether the overall appearance of the pebble-dash exterior surface is uniform after repair.

6. The method for restoring the original appearance of plywood exterior finish according to claim 1, characterized in that, Step g also includes base layer repair and treatment: checking the original base layer for hollowness, cracks and strength, removing the hollow and loose parts on the base layer, performing pressure grouting on the cracks on the base layer, then cleaning the base layer with a high-pressure water gun and roughening it.

7. The method for restoring the original appearance of plywood exterior finish according to claim 1, characterized in that, In step i, the stone particles are made to uniformly expose 1 / 3 to 1 / 2 of their particle size.

8. The method for restoring the original appearance of plywood exterior finish according to claim 1, characterized in that, In step d, the area to be repaired is filled in manually or using AI tools based on key landscape feature parameters.

9. The method for restoring the original appearance of plywood exterior finish according to claim 1, characterized in that, In step e, the image of the sample is compared with the images of each area to be repaired in the landscape layout reference diagram to determine the sample with the closest landscape.

10. The method for restoring the original appearance of plywood exterior finish according to claim 1, characterized in that, In step e, if there is a significant difference between the appearance of the closest sample and the corresponding area of ​​the landscape layout reference image, the stone particle ratio of the closest sample is finely adjusted until there is no significant difference between the appearance of the sample and the corresponding area of ​​the landscape layout reference image.

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