Construction method for simulated black brick wall surface of old building

Abstract

The invention discloses an old building simulation black brick wall surface construction method, and belongs to the technical field of wall surface structure.The old building simulation black brick wall surface construction method comprises the following steps that S1, a wall body is cleaned; s2, laying a steel wire mesh; s3, the exterior of the steel wire mesh is coated with a bottoming mortar layer, and leveling is conducted; s4, a gridding cloth layer is laid on the outer portion of the bottoming mortar layer, and a cover face layer is scraped on the outer portion of the bottoming mortar layer; s5, jointing is conducted on the cover face layer, and the outline of the black brick is drawn out; s6, the outer portion of the finishing coat is coated with a movable surface layer in a brushing mode through a brushing tool; and S7, the movable surface layer at the pointing joint is protected, the pointing joint is subjected to white dripping, and the simulated black brick wall surface is obtained. Therefore, by the adoption of the construction method for the simulated black brick wall face of the old building, the problems that an existing simulated black brick wall face is long in construction period and high in cost can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of wall structure, and in particular to a construction method for simulated blue brick walls of old buildings. Background Art

[0002] In the renovation of the ancient city, there are a large number of dilapidated red and blue brick walls. For the repair of old building walls, the previous process was to tear down and rebuild or use ordinary mortar to imitate blue brick technology. Direct demolition will cause huge economic costs and a long construction period. The traditional mortar imitation blue brick technology has the following disadvantages: first, the mortar layer and the base layer have weak adhesion; second, the mortar surface layer has insufficient crack resistance; third, the mortar surface layer is not flat enough; these reasons cause the wall surface to be insufficiently simulated. Therefore, it is particularly necessary to improve the simulation of the imitation blue brick walls of old buildings.

[0003] Existing patent CN202410722161.5 discloses an antique building wall structure with a blue brick wall and a construction method thereof. The antique building wall structure includes a wall body and a blue brick wall. A casting space is formed between the wall body and the blue brick wall. The casting space is provided with a tie bar with one end embedded in the wall body and the other end tied in the blue brick wall; the side of the wall body opposite to the blue brick wall is painted with waterproof coating; concrete is poured inside the casting space to form a filling layer for bonding the blue brick wall and the wall body into a whole. The antique building wall structure with the blue brick wall is safe and reliable, and the structure is stable; the construction method is simple and easy to operate. In the above patent, the antique building wall structure still uses blue bricks to build walls to achieve a simulation effect. The use of blue bricks to build walls not only leads to a relatively long construction period, but also high construction costs. Summary of the invention

[0004] The invention aims to provide a construction method for simulated blue brick walls of old buildings, so as to solve the problems of long construction period and high cost of existing simulated blue brick walls.

[0005] To achieve the above object, the present invention provides a construction method for simulated blue brick walls of old buildings, comprising the following steps: S1. Clean the wall surface; S2. Lay a wire mesh on the wall, and fix the wire mesh on the wall through fixing parts; S3. Apply a primer mortar layer on the outside of the wire mesh and level the primer mortar layer; S4. Lay a mesh cloth layer on the outside of the primer mortar layer, and apply a cover layer on the outside of the mesh cloth layer, and the cover layer is scraped and compacted on the mesh cloth layer; S5. After the topcoat is solidified, point the topcoat to outline the blue bricks; S6. Use a brush to apply the active surface layer on the outside of the overcoat layer to form a blue brick color; S7. Protect the active surface layer at the grouting joints and whiten the grouting joints; remove the protection to obtain a simulated blue brick wall.

[0006] Preferably, S1 specifically includes: checking the wall structure of the building, filling the missing bricks of the wall with brick mortar; cleaning the wall surface to remove the weathered and brittle wall skin on the wall surface.

[0007] Preferably, in S2, the width of the wire mesh is not less than 200 mm, and the overlap width between the wire mesh and the wall is not less than 100 mm; a plurality of rows of fixing members are arranged on the wire mesh, and adjacent rows of fixing members are staggered.

[0008] Preferably, in S2, the fixing part includes a main body, a fixing hole is arranged in the middle of the main body, a pressing groove for placing a gasket is arranged on the side of the main body away from the wire mesh, the pressing groove is arranged coaxially with the fixing hole, and the fixing part is fixed to the wall by nails passing through the gasket and the pressing groove, and a plurality of card slots are arranged on the side of the main body close to the wire mesh, the card slots are symmetrically distributed on both sides of the fixing hole, the card slots on both sides of the fixing hole are arranged vertically, and the wire mesh is clamped in the card slot; the opening end of the card slot is provided with an inclined surface inclined outward.

[0009] Preferably, in S4, the covering layer is an anti-cracking mortar layer, the mesh cloth is a glass fiber mesh cloth, and the mesh cloth extends out of the edge of the wall by 10mm-20mm; the thickness of the covering layer is 3mm.

[0010] Preferably, in S6, the mass ratio of black iron liquor, 108 glue, blue brick fly ash and water in the active surface layer slurry is 1:2:8:8.

[0011] Preferably, in S6, the brushing tool includes a brush head, the brush head includes a material storage barrel, one end of the material storage barrel is provided with a liquid filling port for adding active surface layer slurry into the material storage barrel, the liquid filling port is provided with a sealing plug for sealing the liquid filling port, the other end of the material storage barrel is provided with a mounting hole, a mounting frame is provided on the outside of the material storage barrel, one end of the mounting frame is fixed to the outside of the liquid filling port, the other end of the mounting frame is fixed to the mounting hole, a handle is provided on the mounting frame, a brushing structure is rotatably provided on the outside of the material storage barrel, and a feeding structure is provided between the material storage barrel and the brushing structure.

[0012] Preferably, the brush coating structure includes a roller, which is sleeved on the outside of the storage barrel, and both ends of the roller are respectively provided with through holes for allowing a liquid filling port and a mounting hole to pass through. The two ends of the roller are rotatably connected to the liquid filling port and the mounting hole, and a plurality of liquid outlet holes that penetrate the roller are evenly arranged on the roller, and both ends of the roller are provided with mounting rings for installing bristles.

[0013] Preferably, the feeding structure includes a feeding roller, both ends of which are rotatably connected to a support plate, the support plate is fixedly arranged at both ends of a storage barrel, an arc-shaped partition is arranged at the bottom of the storage barrel, the partition is provided with a through hole for the feeding roller to pass through, a sealing ring is arranged at the through hole for sealing the connection between the partition and the feeding roller, and a plurality of liquid storage tanks for storing active surface layer slurry are evenly arranged on the feeding roller; a gear is arranged on the rotating shaft of the feeding roller, the gear is located between the support plate and the drum, and a gear ring meshing with the gear is arranged on the drum.

[0014] Preferably, an extension rod is provided at the handle, the extension rod includes a material storage cavity, a connecting head is provided at one end of the material storage cavity, the connecting head is connected to the handle, the material storage cavity is communicated with the internal cavity of the handle through the connecting head, a push rod is slidably provided inside the material storage cavity, a rubber plug is provided at one end of the push rod located inside the material storage cavity, the rubber plug is sealingly and slidably connected to the material storage cavity, a liquid adding hole is provided inside the mounting frame, the liquid adding hole is communicated with the internal cavity of the handle, the liquid outlet end of the liquid adding hole is located in the material storage barrel, and a one-way valve is provided at the liquid outlet end of the liquid adding hole; anti-slip pads are provided on the outside of the handle and the push rod.

[0015] Therefore, the advantages and positive effects of the old building simulated blue brick wall construction method described in the present invention are: 1. The present invention arranges a steel wire mesh on the wall, which is beneficial to improving the strength of the wall, and the steel wire mesh is beneficial to improving the connection strength between the primer mortar layer and the wall. A primer mortar layer is arranged outside the steel wire mesh, and a mesh cloth layer, a cover layer and a live surface layer are arranged outside the primer mortar layer. By arranging the live surface layer on the cover layer, a highly simulated blue brick wall surface is obtained, and blue bricks do not need to be laid, so the construction efficiency is high and it is beneficial to shorten the construction period.

[0016] 2. The mass ratio of iron black liquid, 108 glue, blue brick fly ash and water in the active surface layer slurry is 1:2:8:8. Add iron black liquid to the blue brick fly ash to obtain a highly simulated blue brick wall color.

[0017] 3. The wire mesh is fixed to the wall through a fixing piece. A number of slots are provided on the side of the fixing piece close to the wire mesh, and the slots are symmetrically distributed on both sides of the fixing hole. The slots on both sides of the fixing hole are arranged vertically, so that the two sides of the wire mesh are just stuck in the slots. The open end of the slot is provided with an outward inclined slope to facilitate the insertion of the wire mesh into the slot. The setting of a number of parallel slots enables the fixing piece to adapt to the fixing of wire meshes of different mesh sizes; and when the position of the fixing piece is offset, the two sides of the wire mesh can still be stuck in the slots, thereby improving the fixing effect of the fixing piece on the wire mesh.

[0018] 4. Adding slurry into the storage barrel of the brush head eliminates the need to frequently dip the slurry, which is beneficial to improving construction efficiency and avoiding uneven brushing caused by slurry dripping, thereby improving the simulation effect.

[0019] 5. A feeding roller is arranged between the storage barrel and the drum. The drum drives the feeding roller to rotate. When the active surface layer is not being painted, the drum does not rotate, and the feeding roller does not rotate either. The feeding roller blocks the through hole of the storage barrel, so that the slurry in the storage barrel does not flow out, and avoids the slurry from dripping randomly and causing wall pollution. The setting of the feeding roller is conducive to improving the uniformity of the active surface layer and obtaining a highly simulated blue brick wall.

[0020] 6. An extension rod is provided at the handle to meet the requirements of brushing the active surface layer at high places. Push the push rod of the extension rod, and the push rod pushes the active surface layer slurry in the liquid storage cavity into the handle through the rubber plug, and then injects it into the storage barrel through the liquid filling hole and the one-way valve to replenish the storage barrel, increase the liquid storage capacity of the brushing tool, and help improve construction efficiency.

[0021] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a flow chart of an embodiment of the present invention; Figure 2 This is a schematic diagram of a wall structure according to an embodiment of the present invention; Figure 3 A schematic diagram of the three-dimensional structure of a painting tool according to an embodiment of the present invention; Figure 4 A schematic diagram of the cross-sectional structure of a painting tool according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the brush head structure of an embodiment of the present invention; Figure 6 For attachment Figure 5 Middle A: Enlarged view; Figure 7 This is a schematic diagram of the structure of an extension rod according to an embodiment of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of a material storage barrel according to an embodiment of the present invention; Fig. 9 A schematic diagram of the three-dimensional structure of a drum according to an embodiment of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of a fixing member according to an embodiment of the present invention; Fig.11 It is a front view structural schematic diagram of a fixing member according to an embodiment of the present invention; Fig.12 Schematic diagram of the wire mesh fixing structure according to an embodiment of the present invention.

[0023] Reference numerals 1. Wall; 2. Wire mesh; 3. Primer mortar layer; 4. Mesh cloth layer; 5. Cover layer; 6. Live surface layer; 7. Roller; 8. Handle; 9. Storage chamber; 10. Push rod; 11. Storage barrel; 12. Loading roller; 13. Liquid filling port; 14. Sealing plug; 15. Mounting hole; 16. Liquid storage tank; 17. Mounting frame; 18. Liquid filling hole; 19. One-way valve; 20. Liquid outlet hole; 21. Support plate; 22. Gear ring; 23. Gear; 24. Partition; 25. Rotating shaft; 26. Mounting ring; 27. Rubber plug; 28. Anti-skid pad; 29. ​​Fixing piece; 30. Fixing hole; 31. Slot; 32. Pressing groove. DETAILED DESCRIPTION

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] like Figure 1 , Figure 2 A construction method for simulated blue brick walls of old buildings, comprising the following steps: S1. Clean the surface of the wall 1.

[0027] The specific operation of cleaning the surface of the wall 1 is: manually remove the cement plastering on the surface of the wall 1, and check the structural integrity and stability of the building wall 1. Use brick ash to fill the missing bricks of the wall 1. Use a wire brush to clean the surface of the wall 1 to remove the weathered and alkali-soft wall skin on the surface of the wall 1 to improve the bonding force between the primer mortar layer 3 and the wall 1.

[0028] S2. Lay the steel mesh 2 on the wall 1. The steel mesh 2 is fixed to the wall 1 via the fixing member 29.

[0029] The width of the wire mesh 2 is not less than 200 mm, and the overlap width between the wire mesh 2 and the wall 1 is not less than 100 mm. Laying the wire mesh 2 outside the wall 1 is conducive to improving the strength of the wall 1; and the wire mesh 2 is conducive to improving the connection strength between the primer mortar layer 3 and the wall 1. After the wire mesh 2 is laid on the wall 1, the wire mesh 2 is initially fixed to the wall 1 by the fixing member 29. Fig.12 As shown. The wire mesh 2 is provided with a plurality of rows of fixing members 29, and adjacent rows of fixing members 29 are staggered, which is beneficial to improving the stability of the fixing of the wire mesh 2. In order to provide the close fit between the wire mesh 2 and the wall 1 and the stability of the wire mesh 2, the wire mesh 2 is fixed with a fixing frame, and then cement mortar is pressed on the surface of the wire mesh 2, so that the wire mesh 2 is firmly fixed to the outside of the wall 1.

[0030] like Fig.10 , Fig.11 As shown. The fixing member 29 includes a main body, and the fixing member 29 is made of stainless steel and has good corrosion resistance. A fixing hole 30 is provided in the middle of the main body, and a pressing groove 32 for placing a gasket is provided on the side of the main body away from the wire mesh 2, and the pressing groove 32 is coaxially arranged with the fixing hole 30. The fixing member 29 is fixed to the wall 1 by nails passing through the gasket and the pressing groove 32. A plurality of slots 31 are provided on the side of the main body close to the wire mesh 2, and the slots 31 are symmetrically distributed on both sides of the fixing hole 30. The slots 31 on both sides of the fixing hole 30 are vertically arranged so that the two sides of the wire mesh 2 are just stuck in the slots 31. The opening end of the slot 31 is provided with an outwardly inclined inclined surface to facilitate the wire mesh 2 to be stuck in the slot 31. The arrangement of several parallel slots 31 enables the fixing member 29 to adapt to the fixing of wire meshes 2 with different mesh sizes; and when the position of the fixing member 29 is offset, the two sides of the wire mesh 2 can still be inserted into the slots 31, thereby improving the fixing effect of the fixing member 29 on the wire mesh 2.

[0031] When fixing the wire mesh 2, first put the gasket into the pressing groove 32, put the gasket and the fixing piece 29 on the nail gun, and clamp the wire mesh 2 in the clamping groove 31 of the fixing piece 29, and the nails of the nail gun pass through the fixing holes 30 of the fixing piece 29 to fix the gasket and the fixing piece 29 on the wall 1, so as to fix the wire mesh 2.

[0032] S3, applying a primer mortar layer 3 on the outside of the steel mesh 2, and leveling the primer mortar layer 3.

[0033] In order to improve the connection strength between the primer mortar layer 3 and the wall 1, the wall 1 may be roughened to improve the connection strength between the primer mortar layer 3 and the wall 1. The primer mortar is generally applied only once on the wall 1, without calendering and slurry brushing. The primer mortar layer 3 completely covers the wire mesh 2. If the primer mortar layer 3 has defects such as obvious unevenness, severe cracks, and obvious shrinkage of the mortar joints, apply it again or partially apply it again when the primer mortar layer 3 is slightly dry.

[0034] S4, laying a mesh cloth layer 4 on the outside of the primer mortar layer 3, and applying a finishing layer 5 on the outside of the mesh cloth layer 4, and compacting the mesh cloth layer 4 with the finishing layer 5.

[0035] The overlay layer 5 is an anti-crack mortar layer, and the mesh cloth is a glass fiber mesh cloth, which extends 10mm-20mm from the edge of the wall 1. The overlay layer 5 is 3mm thick. Using the anti-crack mortar layer as the overlay layer 5 is beneficial to improving the crack resistance and durability of the wall. The anti-crack mortar and the glass fiber mesh cloth can effectively ensure the bonding strength between the anti-crack mortar layer and the primer mortar layer 3, avoid cracking, and improve the aesthetics of the wall.

[0036] S5. After the topcoat layer 5 is solidified, point the topcoat layer 5 to outline the blue bricks.

[0037] The standard for curing the overlay 5 is that there is no obvious indentation when pressing with fingers. When grouting, hang the plumb line along the vertical seam from top to bottom, and the grouting sequence is from top to bottom, from horizontal to vertical.

[0038] S6. Use a brush to paint the active surface layer 6 on the outside of the cover layer 5 to form a blue brick color.

[0039] The color difference between the top layer 5 and the real blue brick wall is relatively large. The simulated blue brick wall is formed by brushing the active surface layer 6 slurry on the top layer 5. If the blue brick powder is directly used for brushing, the wall color still has a color difference with the real blue brick wall. In order to obtain a highly simulated blue brick wall, a new active surface layer 6 slurry is prepared. Iron black liquid is added to the blue brick powder to obtain a highly simulated blue brick wall color. The mass ratio of iron black liquid, 108 glue, blue brick powder and water in the active surface layer 6 slurry is 1:2:8:8.

[0040] The traditional active surface layer 6 slurry is applied with a wool brush. When the wool brush is applied to the wall, it is necessary to dip the slurry frequently. On the one hand, the construction efficiency is relatively low. On the other hand, the slurry drips during the dipping process and causes contamination of the wall 1, affecting the uniformity of the wall 1 and the simulation effect.

[0041] In order to improve the uniformity of the active surface layer 6 slurry brushing and improve the construction efficiency, a brushing tool for the active surface layer 6 slurry is designed.

[0042] like Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown. The brushing tool includes a brush head, and the brush head includes a storage barrel 11. One end of the storage barrel 11 is provided with a liquid filling port 13 for adding slurry of the active surface layer 6 into the storage barrel 11, and a sealing plug 14 for sealing the liquid filling port 13 is provided at the liquid filling port 13. When the slurry is added to the storage barrel 11, there is no need to frequently dip the slurry, which is conducive to improving the construction efficiency and avoiding uneven brushing caused by dripping of the slurry, so as to improve the simulation effect. A mounting hole 15 is provided at the other end of the storage barrel 11. A mounting frame 17 is provided on the outside of the storage barrel 11, and the mounting frame 17 is a U-shaped structure. One end of the mounting frame 17 is fixed to the outside of the liquid filling port 13, and the other end of the mounting frame 17 is fixed to the mounting hole 15. The mounting frame 17 blocks the mounting hole 15 to prevent the slurry in the storage barrel 11 from flowing out through the mounting hole 15. A handle 8 is fixedly provided on the mounting frame 17 to facilitate the movement of the storage barrel 11 through the mounting frame 17.

[0043] like Fig. 9 As shown. The storage barrel 11 is rotatably provided with a brush coating structure on the outside. The brush coating structure includes a roller 7, which is sleeved on the outside of the storage barrel 11. The two ends of the roller 7 are respectively provided with through holes for the liquid filling port 13 and the mounting hole 15 to pass through, and the two ends of the roller 7 are rotatably connected to the liquid filling port 13 and the mounting hole 15 through bearings. The roller 7 is evenly provided with a plurality of liquid outlets 20 that penetrate the roller 7. The two ends of the roller 7 are fixedly provided with mounting rings 26 for mounting brush bristles, and the brown bristle brush is fixed on the mounting ring 26, and the brown bristle brush is tightly attached to the outer surface of the roller 7. The slurry flowing out of the storage barrel 11 flows out of the roller 7 through the liquid outlet 20, and then is brushed on the cover layer 5 by the brush bristles.

[0044] like Figure 8 As shown. A feeding structure is provided between the storage barrel 11 and the brushing structure. The feeding structure includes a feeding roller 12, and both ends of the feeding roller 12 are rotatably connected to a support plate 21 through bearings. The support plate 21 is fixedly arranged at both ends of the storage barrel 11. An arc-shaped partition 24 is provided at the bottom of the storage barrel 11, and the partition 24 closes the storage barrel 11 to form a closed cavity. A through hole is provided on the partition 24 for the feeding roller 12 to pass through, and the upper part of the feeding roller 12 is inserted into the storage barrel 11 through the through hole. A sealing ring is fixedly provided at the through hole to seal the connection between the partition 24 and the feeding roller 12, and the feeding roller 12 can rotate relative to the sealing ring. The setting of the sealing ring prevents the slurry from flowing out from the connection between the through hole and the feeding roller 12, so that the slurry can only flow out through the feeding roller 12. The feeding roller 12 is evenly provided with a plurality of liquid storage tanks 16 for storing the active dough layer 6 slurry, and the active dough layer 6 slurry in the storage barrel 11 flows into the liquid storage tank 16 under the action of gravity. The feeding roller 12 is located at the bottom of the storage barrel 11, so that the active dough layer 6 slurry flows into the liquid storage tank 16.

[0045] A gear 23 is fixedly provided on the rotating shaft 25 of the feeding roller 12, and the gear 23 is located between the support plate 21 and the drum 7. A gear ring 22 meshing with the gear 23 is fixedly provided on the drum 7, and the gear 23 is located inside the gear ring 22. When the active surface layer 6 is brushed, the bristles rotate under the action of friction and drive the drum 7 to rotate. The drum 7 drives the gear 23 to rotate through the gear ring 22. Since the diameter of the gear ring 22 is greater than the diameter of the gear 23, the feeding roller 12 rotates rapidly. During the rotation process, the feeding roller 12 brings out the slurry in the storage barrel 11 through the liquid storage tank 16. The slurry in the liquid storage tank 16 is thrown out from the feeding roller 12 under the action of centrifugal force and discharged through the liquid outlet 20 on the drum 7. Then the bristles are brushed on the cover layer 5 to form the active surface layer 6.

[0046] When the active surface layer 6 is not being painted, the roller 7 does not rotate, and the feeding roller 12 does not rotate either. The feeding roller 12 blocks the through hole of the storage barrel 11, so that the slurry in the storage barrel 11 does not flow out, and avoids the slurry from dripping randomly to cause wall pollution. The setting of the feeding roller 12 is conducive to improving the uniformity of the active surface layer 6 and obtaining a highly simulated blue brick wall.

[0047] like Figure 7 As shown. An extension rod is provided at the handle 8 to meet the requirements of brushing the active surface layer 6 at a high place. The extension rod includes a storage chamber 9, and a connector is fixedly provided at one end of the storage chamber 9, and the connector is connected to the handle 8 by a thread. The storage chamber 9 is connected to the internal cavity of the handle 8 through the connector. A push rod 10 is slidably provided inside the storage chamber 9, and a rubber plug 27 is fixedly provided at one end of the push rod 10 located inside the storage chamber 9, and the rubber plug 27 is sealed and slidably connected to the storage chamber 9. The push rod 10 drives the rubber plug 27 to slide in the storage chamber 9, so that the slurry of the active surface layer 6 is sucked into the storage chamber or pushed out of the storage chamber. A liquid adding hole 18 is provided inside the mounting frame 17, and the liquid adding hole 18 is connected to the internal cavity of the handle 8. The liquid outlet end of the liquid adding hole 18 is located in the storage barrel 11, and a one-way valve 19 is provided at the liquid outlet end of the liquid adding hole 18. Push the push rod 10, and the push rod 10 pushes the active surface layer 6 slurry in the liquid storage cavity into the handle 8 through the rubber plug 27, and then injects it into the storage barrel 11 through the liquid filling hole 18 and the one-way valve 19, replenishing the storage barrel 11 and increasing the liquid storage capacity of the brush tool. The handle 8 and the push rod 10 are both provided with anti-skid pads 28 on the outside.

[0048] S7, protecting the active surface layer 6 at the grouting joint, and whitening the grouting joint. The method for protecting the active surface layer 6 is to stick paper tape on the active surface layer 6, and the paper tape is stuck on both sides of the grouting joint to avoid contamination of the active surface layer 6 during whitening. Use a grouting machine to grout white mortar in the grouting joint and whiten it. After the white mortar is dry, remove the paper tape to obtain a simulated blue brick wall.

[0049] Therefore, the use of the old building imitation blue brick wall construction method of the present invention can solve the existing imitation blue brick wall construction problems of long construction period and high cost.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A construction method for simulated blue brick walls of old buildings, characterized in that: The following steps are involved: S1. Clean the wall surface; S2. Lay a wire mesh on the wall, and fix the wire mesh on the wall through fixing parts; S3. Apply a primer mortar layer on the outside of the wire mesh and level the primer mortar layer; S4. Lay a mesh cloth layer on the outside of the primer mortar layer, and apply a cover layer on the outside of the mesh cloth layer, and the cover layer is scraped and compacted on the mesh cloth layer; S5. After the topcoat is solidified, point the topcoat to outline the blue bricks; S6. Use a brush to apply the active surface layer on the outside of the overcoat layer to form a blue brick color; S7. Protect the active surface layer at the grouting joints and whiten the grouting joints; remove the protection to obtain a simulated blue brick wall.

2. The construction method of an old building simulated blue brick wall according to claim 1, characterized in that: The S1 specifically includes: checking the wall structure of the building, filling the missing bricks of the wall with brick mortar; cleaning the wall surface, and removing the weathered and brittle wall skin on the wall surface.

3. The construction method of an old building simulated blue brick wall according to claim 1, characterized in that: In S2, the width of the steel mesh is not less than 200 mm, and the overlap width of the steel mesh and the wall is not less than 100 mm; a plurality of rows of fixing members are arranged on the steel mesh, and adjacent rows of fixing members are staggered.

4. The construction method of simulated blue brick wall of old buildings according to claim 3 is characterized by: In S2, the fixing part includes a main body, a fixing hole is arranged in the middle of the main body, a pressing groove for placing a gasket is arranged on the side of the main body away from the wire mesh, the pressing groove is arranged coaxially with the fixing hole, and the fixing part is fixed to the wall by nails passing through the gasket and the pressing groove, and a plurality of card slots are arranged on the side of the main body close to the wire mesh, the card slots are symmetrically distributed on both sides of the fixing hole, the card slots on both sides of the fixing hole are arranged vertically, and the wire mesh is clamped in the card slot; the opening end of the card slot is provided with an inclined surface inclined outward.

5. The construction method of simulated blue brick wall of old buildings according to claim 1 is characterized by: In S4, the covering layer is an anti-cracking mortar layer, the mesh cloth is a glass fiber mesh cloth, and the mesh cloth extends out of the edge of the wall by 10mm-20mm; the thickness of the covering layer is 3mm.

6. The construction method of simulated blue brick wall of old buildings according to claim 1 is characterized by: In S6, the mass ratio of black iron liquor, 108 glue, blue brick fly ash and water in the active surface layer slurry is 1:2:8:

8.

7. The construction method of simulated blue brick wall of old buildings according to claim 1 is characterized by: In the S6, the brushing tool includes a brush head, and the brush head includes a material storage barrel. A liquid filling port for adding active surface layer slurry into the material storage barrel is provided at one end of the material storage barrel, and a sealing plug for sealing the liquid filling port is provided at the liquid filling port. A mounting hole is provided at the other end of the material storage barrel, and a mounting frame is provided outside the material storage barrel, one end of the mounting frame is fixed to the outside of the liquid filling port, and the other end of the mounting frame is fixed to the mounting hole. A handle is provided on the mounting frame, and a brushing structure is rotatably provided outside the material storage barrel, and a feeding structure is provided between the material storage barrel and the brushing structure.

8. The construction method of simulated blue brick wall of old buildings according to claim 7 is characterized by: The brush coating structure includes a roller, which is sleeved on the outside of a storage barrel. Both ends of the roller are respectively provided with through holes for a liquid filling port and a mounting hole to pass through. Both ends of the roller are rotatably connected to the liquid filling port and the mounting hole. A plurality of liquid outlet holes penetrating the roller are evenly arranged on the roller, and both ends of the roller are provided with mounting rings for mounting brush bristles.

9. The construction method of simulated blue brick wall of old buildings according to claim 8, characterized in that: The feeding structure includes a feeding roller, both ends of which are rotatably connected to a support plate, the support plate is fixedly arranged at both ends of a storage barrel, an arc-shaped partition is arranged at the bottom of the storage barrel, a through hole is arranged on the partition for the feeding roller to pass through, a sealing ring is arranged at the through hole for sealing the connection between the partition and the feeding roller, and a plurality of liquid storage tanks for storing active surface layer slurry are evenly arranged on the feeding roller; a gear is arranged on the rotating shaft of the feeding roller, the gear is located between the support plate and the drum, and a gear ring meshing with the gear is arranged on the drum.

10. The construction method of simulated blue brick wall of old buildings according to claim 9, characterized in that: An extension rod is provided at the handle, and the extension rod includes a material storage cavity. A connecting head is provided at one end of the material storage cavity, and the connecting head is connected to the handle. The material storage cavity is connected with the internal cavity of the handle through the connecting head. A push rod is slidably provided inside the material storage cavity, and a rubber plug is provided at one end of the push rod located inside the material storage cavity. The rubber plug is sealingly and slidably connected with the material storage cavity. A liquid adding hole is provided inside the mounting frame, and the liquid adding hole is connected with the internal cavity of the handle. The liquid outlet end of the liquid adding hole is located in the material storage barrel, and a one-way valve is provided at the liquid outlet end of the liquid adding hole; anti-slip pads are provided on the outside of the handle and the push rod.

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