Construction method for repairing fair-faced concrete wall

Abstract

The invention relates to a construction method for repairing a fair-faced concrete wall. The construction method comprises the following steps: dividing a repairing area on the wall according to a damaged surface; joint cutting is conducted on the boundary of the repairing area; after joint cutting is completed, the damaged wall in the repairing area is chiseled away; mounting a template on the wall body; performing supplementary pouring operation in the template; and after the formwork is removed, the surface of the supplementary pouring body is coated with a protective agent. According to the construction method for repairing the fair-faced concrete wall, overall dismantling and re-overall pouring are avoided by dividing the repairing area, the cost can be saved, targeted chiseling and supplementary pouring are conducted in the repairing area, the working efficiency is improved, and the building quality of the wall is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of construction, in particular to a construction method for repairing a plain concrete wall. Background Art

[0002] Fair-faced concrete requires one-time molding, high construction quality requirements, and high costs. If relatively large defects are found in some parts, such as honeycombs, rough surfaces, local mold expansion and exposed reinforcement, which seriously affect the appearance of the entire surface, but the pouring effect of other areas can meet the requirements of the architect, is it necessary to demolish the entire wall and re-pour it? The cost of demolishing the entire wall is relatively high, and the construction period is also greatly affected.

[0003] Of course, the best way to deal with it is to chisel out the defects and solve the problems in a targeted manner by pouring the defects a second time. This can reduce workload, save construction time, and ensure quality.

[0004] The existing technology uses conventional grouting materials for secondary pouring, but the color of conventional grouting materials cannot meet the requirements of plain concrete, and the texture of the outer wall formed cannot be consistent with that of plain concrete. If you pursue texture and color, the base of the structural surface needs to be lower than the original structural surface after the repair is completed, and the concave area should be polished with sandpaper. Use imitation plain water special repair putty to fill the concave area in two times. The thickness of each repair is 1-2mm. Wait for the repair putty to dry and then polish it again. If there is damage, pores, or unevenness on the base surface, please repair it. After the repair material is dry, polish it again. Use inorganic adjustment materials to adjust the color difference of the repair material, and use special flower-patting tools to make the natural texture of concrete. Repeated color adjustment and correction of the color difference with the original plain concrete to make it close to the original concrete texture. After the color adjustment process is completed, no other treatment will be done for the time being. The overall color difference will be adjusted uniformly before the overall application of the protective agent in the later stage to keep the texture transition natural, but the construction is cumbersome and the technical requirements are high. The final grouting material is also prone to cracking and difficult to maintain. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a construction method for repairing fair-faced concrete walls, so as to solve the problem that the color and outer wall texture formed by secondary pouring of existing conventional grouting materials are inconsistent with the color and texture of fair-faced concrete and are prone to cracking.

[0006] The technical solution to achieve the above-mentioned purpose is: a construction method for repairing a plain concrete wall, comprising the following steps: dividing a repair area on the wall according to the damaged surface; cutting a slit at the boundary of the repair area; after the slit is completed, chiseling the damaged wall in the repair area to form a groove; installing a template on the outer side of the groove; pouring a castable for repair in the groove to form a repair body; after the template is removed, applying a protective agent on the surface of the repair body.

[0007] In a construction method for repairing a plain concrete wall of the present invention, the cost can be saved by dividing the repair area to avoid overall demolition and re-casting of the entire wall, and targeted chiseling and repair casting are performed in the repair area, thereby improving work efficiency and ensuring the construction quality of the wall.

[0008] A further improvement of the construction method for repairing a plain concrete wall of the present invention is that before the template is installed on the outer side of the groove, the method includes: applying an interface agent on the roughened wall formed by chiseling in the groove.

[0009] A further improvement of the construction method for repairing a plain concrete wall of the present invention is that before the template is installed correspondingly on the outer side of the groove, it also includes: implanting pins on the roughened wall.

[0010] A further improvement of the construction method for repairing a plain concrete wall of the present invention is that the corresponding installation of a template on the outer side of the groove includes: a slurry leakage prevention structure is arranged around the template.

[0011] A further improvement of the construction method for repairing a plain concrete wall of the present invention is that pouring the castable for repair in the template to form the repair body comprises: using a vibrator to assist in vibration during the pouring process.

[0012] A further improvement of the construction method for repairing a plain concrete wall of the present invention is that the pouring of the repairing casting material in the template to form the repaired body further comprises: using small-size concrete as the pouring material.

[0013] A further improvement of the construction method for repairing a plain concrete wall of the present invention is that pouring the castable for repair in the template to form the repair body also includes: selecting the setting position of the feed opening according to the position of the template on the wall.

[0014] A further improvement of the construction method for repairing a plain concrete wall of the present invention is that the method of selecting the location of the feed opening according to the location of the template on the wall comprises: if the upper end of the template extends to the top of the wall, the feed opening is set at the top of the wall.

[0015] A further improvement of the construction method for repairing a plain concrete wall of the present invention is that the step of selecting the location of the feed opening according to the location of the template on the wall further comprises: if the template is located in the middle of the wall, the feed opening is located at the back of the wall.

[0016] A further improvement of the construction method for repairing a plain concrete wall of the present invention is that if the template is set in the middle of the wall, setting the feed opening at the back of the wall includes: drilling a hole from the back of the wall corresponding to the repair area to penetrate the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic diagram of a process for repairing a plain concrete wall.

[0018] Figure 2 It is a schematic diagram of the process before step S140 of the present invention.

[0019] Figure 3 FIG. 4 is another flow chart before step S140 of the present invention.

[0020] Figure 4 It is a flowchart diagram of step S140 of the present invention.

[0021] Figure 5 It is a schematic diagram of the flow of step S150 of the present invention.

[0022] Figure 6 FIG. 4 is another flowchart diagram of step S150 of the present invention.

[0023] Figure 7 FIG. 4 is another flowchart diagram of step S150 of the present invention.

[0024] Figure 8 It is a flowchart diagram of step S153 of the present invention.

[0025] Fig. 9 FIG. 4 is another flowchart diagram of step S153 of the present invention.

[0026] Fig.10 It is a flowchart diagram of step S1532 of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] See also Figure 1 , showing a schematic diagram of a process of repairing a plain concrete wall according to the present invention. The present invention provides a construction method for repairing a plain concrete wall, comprising the following steps:

[0029] Execute step S110: divide the wall into repair areas according to the damaged surface.

[0030] The damaged surface includes honeycomb, rough surface, local mold expansion and exposed reinforcement, etc. The repair area is divided according to the location of the Zen seam on the wall, and the boundary of the repair area needs to correspond to the location of the Zen seam of the exposed wall. Then, step S120 is executed.

[0031] Execute step S120: perform cutting at the boundary of the repair area.

[0032] The cutting is performed along the Zen seam position of the original template to ensure that the construction seam of the additional pouring is connected to the Zen seam position, and the connection is easy to handle and beautiful. Then, step S130 is executed.

[0033] Execute step S130: After the cutting is completed, the damaged wall in the repair area is chiseled away to form a groove.

[0034] Among them, walls with damaged surfaces need to be manually removed, loose concrete in uncast parts needs to be removed, and loose aggregates, gravel, slag and dust on the surface need to be removed.

[0035] In this embodiment, due to the setting of the cut, the damaged part of the wall is separated from the rest of the wall, and the damage to other parts is avoided during the chiseling operation. If the steel bars are affected, the steel bars need to be re-tied to ensure the thickness of the protective layer. The chiseling operation forms a groove on the wall, and the depth of the groove is set according to actual needs and is not specifically limited here. Then, step S140 is executed.

[0036] Execute step S140: install a template corresponding to the outer side of the groove.

[0037] The template is set on the outside of the repair area. The template is a flat plate, which directly covers the groove formed by chiseling, and a space for pouring the plain concrete for repair is formed between the inner surface of the template and the groove.

[0038] In this embodiment, the template segmentation is consistent with the original clear water segmentation, ensuring that the joint seams of the supplementary cast body in the template are in a straight line with the upper and lower Zen seams. It is necessary to set the clear water template and the concrete surface of the clear water wall to be close to avoid the misalignment of the post-casting part, and then execute step S150.

[0039] Execute step S150: pour a restoration casting material into the groove to form a restoration.

[0040] The additional pouring should be done at a uniform speed and not too fast to affect the uniformity of the castable and prevent the formation of cavities. Then, step S160 is executed.

[0041] Execute step S160: after the template is removed, apply a protective agent on the surface of the restoration.

[0042] The formwork is removed 72 hours after the additional pouring, and the restoration needs to be maintained after the formwork is removed. The protective agent is applied to the outer wall of the restoration and the outer wall of the wall to protect the entire outer wall, especially the joints.

[0043] In this embodiment, plastic film is used for curing, and the curing time is not less than 7 days.

[0044] See also Figure 2 , shows a flow chart before step S140 of the present invention. The present invention provides a construction method for repairing a plain concrete wall, which includes before step S140:

[0045] Execute step S1401: apply an interface agent on the roughened wall formed by chiseling in the groove.

[0046] The purpose of applying the interface agent on the roughened wall is to enhance the bonding effect. The roughened wall needs to be cleaned before the interface agent is applied to ensure the effective connection between the supplementary casting and the original concrete.

[0047] See also Figure 3 , shows another flow chart before step S140 of the present invention. The present invention provides a construction method for repairing a plain concrete wall, which also includes before step S140:

[0048] Execute step S1402: implant pins on the roughened wall.

[0049] Among them, the pins can enhance the connection effect between the additionally poured concrete and the original concrete, and have a reinforcing effect.

[0050] In this embodiment, the diameter of the pin is 6mm. A drill is used to drill holes with a hole diameter of 8mm to 10mm and a depth of 6cm. The pins are implanted 6cm into the wall concrete with anchor glue, and the pins are exposed 10mm to 15mm. The pins are arranged in a plum blossom shape, and the spacing is not specifically limited here and is set according to actual needs.

[0051] See also Figure 4 , showing a flow chart of step S140 of the present invention. The present invention provides a construction method for repairing a plain concrete wall, step S140 comprising:

[0052] Execute step S141: set up a slurry leakage prevention structure around the template.

[0053] Wherein, double-sided adhesive is pasted around the template to adhere to the outer wall of the wall to prevent water loss and grout leakage during grouting. In this embodiment, the coverage area of ​​the template on the wall is larger than the area formed by the groove.

[0054] See also Figure 5 , showing a flow chart of step S150 of the present invention. The present invention provides a construction method for repairing a plain concrete wall, step S150 comprising:

[0055] Execute step S151: use small-size concrete as pouring material.

[0056] Among them, through pouring tests on grouting materials, concrete without coarse aggregate, and small-particle concrete, it was found that grouting materials and concrete repairs without coarse aggregate could not meet the requirements of fair-faced concrete, while small-particle concrete could meet the requirements of color and texture.

[0057] See also Figure 6 , shows another flow chart of step S150 of the present invention. The present invention provides a construction method for repairing a plain concrete wall, step S150 further comprising:

[0058] Execute step S152: Use a vibrator to assist in vibration during the pouring process.

[0059] Among them, small vibrating rods, flat vibrators, and rubber hammers are used to assist in vibration. During the knocking process with a rubber hammer, the force must be controlled and not hit hard. Attention should be paid to protecting the formwork to prevent misalignment and leakage.

[0060] See also Figure 7 , shows another flow chart of step S150 of the present invention. The present invention provides a construction method for repairing a plain concrete wall, step S150 further comprising:

[0061] Execute step S153: select the setting position of the feed opening according to the position of the template on the wall.

[0062] Among them, the size of the feeding port is set to 30cm×30cm, and the spacing between the feeding ports is set to 1m. When the slurry overflows from the edge of the port, it proves that the pouring is completed. After observation, the grouting is stopped to ensure that there is no cavity in the supplementary pouring body.

[0063] See also Figure 8 , showing a flow chart of step S153 of the present invention. The present invention provides a construction method for repairing a plain concrete wall, step S153 comprising:

[0064] Execute step S1531: If the upper end of the template extends to the top of the wall, set the feed opening at the top of the wall.

[0065] Among them, if the damaged area is located at the upper end of the wall and the top of the divided repair area reaches the top of the wall, the upper end surface of the template is set flush with the top surface of the wall, and the feed port can be directly set at the top of the wall. The defective surface at the feed port after casting can be ground and polished according to the appearance requirements, which has no effect on the appearance of the outer wall of the supplementary casting body.

[0066] See also Fig. 9 , shows another flow chart of step S153 of the present invention. The present invention provides a construction method for repairing a plain concrete wall, step S153 further includes:

[0067] Execute step S1532: If the template is set in the middle of the wall, set the feed opening at the back of the wall.

[0068] Among them, when the template is set in the middle of the wall, in order to ensure that the outer wall of the supplementary casting is flawless, the feed port is set at the back of the wall, and casting is performed from the inside of the template, which will not affect the flatness of the outer wall of the supplementary casting.

[0069] See also Fig.10 , showing a flow chart of step S1532 of the present invention. The present invention provides a construction method for repairing a plain concrete wall, step S1532 comprising:

[0070] Execute step S15321: drill a hole from the back of the wall corresponding to the repair area, penetrating the wall.

[0071] Among them, drilling a hole at the upper end of the bottom of the groove is conducive to pouring and reducing the appearance of cavities. After pouring, the feed opening needs to be removed 24 hours after grouting, and the feed opening part needs to be cut and polished.

[0072] In this embodiment, in order to prevent cracking and leakage of the wall, the hole of the feed opening is sealed and filled, and resin materials can be used to strengthen the inside of the wall.

[0073] The present invention is described in detail above in conjunction with the embodiments of the drawings. A person skilled in the art can make various changes to the present invention according to the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be the scope defined by the attached claims.

Claims

1. A construction method for repairing a plain concrete wall, characterized in that: The steps include: Divide the repair area on the wall according to the damaged surface; Making cuts at the boundaries of the repair area; After the cutting is completed, the damaged wall in the repair area is chiseled out to form a groove; A template is installed correspondingly on the outer side of the groove; pouring a castable material for repair in the groove to form a repair body; After the template is removed, a protective agent is applied on the surface of the restoration.

2. A construction method for repairing a plain concrete wall according to claim 1, characterized in that: Before the template is installed on the outer side of the groove, the method includes: An interface agent is applied on the roughened wall formed by chiseling in the groove.

3. A construction method for repairing a plain concrete wall according to claim 2, characterized in that: Before the template is installed on the outer side of the groove, the method further includes: Pins are implanted in the roughened wall.

4. A construction method for repairing a plain concrete wall according to claim 1, characterized in that: The corresponding installation template on the outer side of the groove includes: A slurry leakage prevention structure is arranged around the template.

5. A construction method for repairing a plain concrete wall according to claim 1, characterized in that: The pouring of the castable material for repair in the template to form the repair body comprises: During the pouring process, a vibrator is used to assist in vibration.

6. A construction method for repairing a plain concrete wall according to claim 1, characterized in that: The pouring of the castable material for repair in the template to form the repair body also includes: Small-size concrete is used as the casting material.

7. A construction method for repairing a plain concrete wall according to claim 6, characterized in that: The pouring of the castable material for repair in the template to form the repair body also includes: The location of the feed opening is selected according to the location of the template on the wall.

8. A construction method for repairing a plain concrete wall according to claim 7, characterized in that: The step of selecting the location of the feed opening according to the location of the template on the wall comprises: If the upper end of the template extends to the top of the wall, the feed opening is arranged at the top of the wall.

9. A construction method for repairing a plain concrete wall according to claim 7, characterized in that: The step of selecting the location of the feed opening according to the location of the template on the wall also includes: If the template is arranged in the middle of the wall, the feed opening is arranged at the back of the wall.

10. A construction method for repairing a plain concrete wall according to claim 9, characterized in that: If the template is set in the middle of the wall, setting the feed opening at the back of the wall includes: A hole is drilled from the back of the wall corresponding to the repair area to penetrate the wall.

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