A method for restoring the appearance of exposed brick walls in historical buildings

Abstract

This invention discloses a method for restoring the appearance of exposed brick walls in historical buildings. The method includes the following steps: S1. Making new clay bricks according to the specifications of the old bricks in the exposed brick wall; S2. Determining the location of the new clay bricks and determining the exposed surfaces of the corresponding new clay bricks based on the location; S3. Sealing all six sides of the new clay bricks; S4. Preparing a colorant and applying it to the new clay bricks so that the color of the new clay bricks matches the color of the old bricks, and recording the ratio for later use; S5. Laying or cutting and pasting new clay bricks in the area of ​​the exposed brick wall to be repaired until the repair is complete, and then cleaning the surface of any contaminated mortar and bonding mortar; S6. Preparing the colorant according to the ratio obtained in step S4, and spraying or brushing the color onto all the new clay bricks that need color matching; S7. After the colorant dries, confirming that the overall color appearance is correct, and the repair is complete. This invention solves the problem of procuring old bricks and reduces the cost of unnecessary color matching processes, while improving the aesthetics.

Description

Technical Field

[0001] This invention relates to the field of historical building restoration, and in particular to a method for restoring the appearance of exposed brick walls in historical buildings. Background Technology

[0002] When the exposed brick walls of historical buildings deteriorate over time, existing techniques include replacing the bricks with new ones, repairing the surface with brick mortar, and partial repairs with brick powder. However, these existing techniques have the following problems:

[0003] 1) The repair method using hollowing out and brickwork requires the purchase of old bricks. The old bricks purchased will differ significantly from the historical buildings to be repaired in terms of specifications, color, and the patina and glaze texture of their surfaces. Moreover, the quantity of old bricks that can be purchased is limited.

[0004] 2) For exposed brick walls, a flat-color process is used for bricks with color variations, but flat-coloring requires the entire brick wall to be done. For large areas of brick walls with a uniform color and only a small portion that needs repair, large-area flat-coloring is too costly, and the flat-colored brick wall also loses the natural feel of the original brick wall. Summary of the Invention

[0005] To address the shortcomings of the existing technology, this invention provides a method for restoring the appearance of exposed brick walls in historical buildings. This method not only solves the problem of procuring old bricks but also reduces the cost of unnecessary color-matching processes and improves aesthetics. To achieve the above-mentioned objectives, this invention provides the following technical solution:

[0006] A method for restoring the exterior appearance of exposed brick walls in historical buildings, the method comprising the following steps:

[0007] S1. Make new clay bricks according to the specifications of the old bricks in the exposed brick wall, and make the color of the new clay bricks lighter than that of the old bricks.

[0008] S2. Based on the area to be repaired in the fair-faced brick wall, determine the location of the newly made clay bricks, and determine the exposed surface of the corresponding newly made clay bricks based on the location. The exposed surface refers to the part of each newly made clay brick that is exposed after the fair-faced brick wall is repaired.

[0009] S3. Seal the six sides of the newly made clay bricks by applying a coat of exterior wall paint primer;

[0010] S4. Color mixing: Mix the colorant and apply it to the newly made clay bricks so that the color of the new clay bricks matches the color of the old bricks. Record the mixing ratio for future use.

[0011] S5. Lay or cut and install new clay bricks in the area of ​​the exposed brick wall to be repaired until the repair is complete. Clean the surface of the contaminated masonry mortar and bonding mortar.

[0012] S6. Prepare the colorant according to the ratio obtained in step S4, and spray or brush the colorant onto all the newly made clay bricks that need to be colored; S7. After the colorant dries, confirm that the overall color appearance is correct, and the repair is completed.

[0013] Furthermore, in step S2, after determining the exposed surface, the exposed surface is polished until it looks the same as the exposed part of the complete old brick.

[0014] Furthermore, the method for polishing the exposed surface is to first use 120-grit sandpaper for rough polishing, then use 120-grit sandpaper for fine polishing, and finally use 320-grit sandpaper for polishing.

[0015] Furthermore, after polishing, clean the surface to remove any remaining dust and debris.

[0016] Furthermore, in step S3, the exterior wall primer is a transparent water-based alkali-resistant coating.

[0017] Furthermore, in step S4, the colorant is prepared by mixing an aqueous colorant paste and an acrylic organic dye.

[0018] Furthermore, in step S6, after the coloring is completed, a transparent water-based protective agent is applied.

[0019] Furthermore, in step S7, after the pigment dries, a second transparent water-based alkali-resistant coating is applied to the exposed surface of the newly made clay bricks, and finally, a transparent matte water-based exterior wall coating is applied.

[0020] Based on the above technical solution, the technical solution of the present invention has the following advantages compared with the prior art:

[0021] 1. There is no need to purchase old bricks, which saves procurement costs and avoids the problem of difficulty in timely procurement due to insufficient quantity of old bricks.

[0022] 2. Using transparent water-based alkali-resistant exterior wall paint primer to seal the six sides of newly made clay bricks can not only prevent the alkaline penetration of the mixed mortar or bonding mortar, but also prevent the uneven density of the surface of the newly made clay bricks, which would result in different shades of color on the brick surface when coloring.

[0023] 3. After the coloring is completed, apply a transparent water-based protective agent to increase the weather resistance of the distressed color.

[0024] 4. The exposed brick wall, after being repaired using this invention, has a more harmonious and aesthetically pleasing overall color. Detailed Implementation

[0025] The present invention will be further elaborated below with specific examples to provide a clearer understanding of its structural type and usage, but this should not be used to limit the scope of protection of the present invention patent.

[0026] A method for restoring the exterior appearance of exposed brick walls in historical buildings, the method comprising the following steps:

[0027] S1. Newly made clay bricks are used, with specifications consistent with those used in the specific historical buildings being renovated. Furthermore, the color of the newly made bricks is lighter than that of the old bricks in the historical buildings being renovated, to facilitate color matching later.

[0028] S2. Determine the exposed surface after the newly made clay bricks are laid and pasted, and then polish the exposed surface. A disc sander is used for polishing; first, use 120-grit sandpaper for coarse grinding, then 180-grit sandpaper for fine grinding, and finally 320-grit sandpaper for polishing. The standard for polishing is to achieve the same appearance as the original, intact, and aesthetically pleasing surface of the old bricks in the historical building being restored, without any alterations.

[0029] Clean the dust and debris remaining on the surface after polishing.

[0030] S3. Apply a light coat of transparent water-based alkali-resistant exterior wall paint primer to seal all six sides of the brick. This sealing serves two purposes: first, it prevents the alkaline penetration of the masonry or bonding mortar; second, it prevents uneven density on the surface of newly made clay bricks, which would result in varying shades of color on the brick surface during coloring.

[0031] S4. Water-based colorant, acrylic organic dyes, and transparent water-based protective agent are used. On-site color matching is conducted to address the difference between the base color of newly made clay bricks and the color of the bricks in the specific historical building being repaired. The aim is to ensure color consistency between the new and old bricks. After color matching, the surface of the new clay bricks is painted, and samples of different shades are created around the exterior wall of the specific historical building being repaired. The proportions of the colorant used for each sample are recorded. The color of the dye on the new clay bricks after drying, matching the color of the old bricks, is selected as the formula for the colorant used in large-scale construction.

[0032] Applying a transparent water-based protective agent to the surface of newly made clay bricks after coloring and drying increases the weather resistance of the distressed color.

[0033] S5. Construct or cut and install new clay bricks on the exterior walls of the historical buildings to be repaired, and clean the surface of the contaminated masonry mortar and bonding mortar.

[0034] S6. Apply color to all newly made clay bricks that require color matching by spraying or brushing according to the final color mixing formula.

[0035] S7. After the dye on the main surface has dried, compare it again with the color of the bricks of the specific historical building being repaired. After all parties have confirmed that the overall color appearance is correct, apply a second layer of transparent water-based alkali-resistant exterior wall paint primer to the clay brick surface, followed by a final layer of transparent matte water-based exterior wall paint topcoat. The number and thickness of the primer and topcoat coats are based on the appearance effect compared to the bricks of the specific historical building being repaired.

[0036] Undoubtedly, the present invention may have other similar structural compositions and uses besides the embodiments described above. In summary, the present invention also includes other modifications and substitutions that will be obvious to those skilled in the art.

Claims

1. A method for restoring the appearance of exposed brick walls in historical buildings, characterized in that, The method includes the following steps: S1. Make new clay bricks according to the specifications of the old bricks in the exposed brick wall, and make the color of the new clay bricks lighter than that of the old bricks. S2. Based on the area to be repaired in the fair-faced brick wall, determine the location of the newly made clay bricks, and determine the exposed surface of the corresponding newly made clay bricks based on the location. The exposed surface refers to the part of each newly made clay brick that is exposed after the fair-faced brick wall is repaired. S3. Seal the six sides of the newly made clay bricks by applying a coat of exterior wall paint primer; S4. Color mixing: Mix the colorant and apply it to the newly made clay bricks so that the color of the new clay bricks matches the color of the old bricks. Record the mixing ratio for future use. S5. Lay or cut and install new clay bricks in the area of ​​the exposed brick wall to be repaired until the repair is complete. Clean the surface of the contaminated masonry mortar and bonding mortar. S6. Prepare the colorant according to the ratio obtained in step S4, and spray or brush the colorant onto all the newly made clay bricks that need to be colored. S7. After the pigment dries, confirm that the overall color appearance is correct, and the repair is complete.

2. The method for restoring the appearance of exposed brick walls of historical buildings according to claim 1, characterized in that, In step S2, after determining the exposed surface, the exposed surface is polished until it looks the same as the exposed part of the complete old brick.

3. The method for restoring the appearance of exposed brick walls of historical buildings according to claim 2, characterized in that, The method for polishing exposed surfaces is to first use 120-grit sandpaper for rough polishing, then use 120-grit sandpaper for fine polishing, and finally use 320-grit sandpaper for polishing.

4. The method for restoring the appearance of exposed brick walls of historical buildings according to claim 3, characterized in that, After polishing, clean the surface to remove any remaining dust and debris.

5. The method for restoring the appearance of exposed brick walls of historical buildings according to claim 1, characterized in that, In step S3, the exterior wall coating primer is a transparent water-based alkali-resistant coating.

6. The method for restoring the appearance of exposed brick walls of historical buildings according to claim 1, characterized in that, In step S4, the colorant is prepared by mixing water-based color paste and acrylic organic dye.

7. The method for restoring the appearance of exposed brick walls of historical buildings according to claim 1, characterized in that, In step S6, after the coloring is completed, a transparent water-based protective agent is applied.

8. The method for restoring the appearance of exposed brick walls of historical buildings according to claim 5, characterized in that, In step S7, after the pigment dries, a second layer of transparent water-based alkali-resistant coating is applied to the exposed surface of the newly made clay bricks, and finally, a transparent matte water-based exterior wall paint is applied.