CN118273547A - Cleaning and repairing method for damaged surface brick wall without breaking and tearing and without color difference - Google Patents
Cleaning and repairing method for damaged surface brick wall without breaking and tearing and without color difference Download PDFInfo
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- CN118273547A CN118273547A CN202410710642.4A CN202410710642A CN118273547A CN 118273547 A CN118273547 A CN 118273547A CN 202410710642 A CN202410710642 A CN 202410710642A CN 118273547 A CN118273547 A CN 118273547A
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- 238000004140 cleaning Methods 0.000 title claims abstract description 43
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- WFPZPJSADLPSON-UHFFFAOYSA-N dinitrogen tetraoxide Chemical compound [O-][N+](=O)[N+]([O-])=O WFPZPJSADLPSON-UHFFFAOYSA-N 0.000 description 2
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- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention relates to the technical field of construction measures of the existing building, and discloses a method for cleaning and repairing a damaged brick wall of a clean water brick without breaking and disassembling and without color difference. And the slurry which is infiltrated outside can infiltrate into the imitated brick surface layer together when the brick wall is grouting and reinforced, the imitated brick surface layer is firmly fixed on the brick wall, and finally, the surface of the imitated brick surface layer is treated by the infiltration crystalline waterproof coating, so that the residual pores in the imitated brick surface layer are fully filled, and the intensity is obviously improved, and meanwhile, the conventional brick walls are damaged by the corrosion of the immune soluble salt crystal, the biological corrosion and the frost heaving. Meanwhile, the whole repairing process is high in efficiency, does not need to be broken and disassembled, and does not generate chromatic aberration.
Description
Technical Field
The invention relates to the technical field of construction measures of existing buildings, in particular to a cleaning and repairing method for a surface damaged brick wall without breaking and disassembling and color difference.
Background
The clear water brick wall is a wall body which is not plastered and not faced after being built so as to represent the texture of the masonry. A considerable number of ancient building walls are of this type. In addition, many early plants were of this type.
Concrete bricks appear later and the appearance is often not satisfactory for use as a dry brick wall, so dry brick walls are mainly clay brick walls. Clay bricks are porous substances, which are formed by integrating soil particles by silicate/aluminosilicate generated in the sintering process, are easy to absorb water, and contain a few salts with relatively high solubility. This results in damage to it from a number of different factors:
1. Repeated dissolution and crystallization of soluble salts, and grain growth causes pulverization of the brick surface;
2. corrosive substances such as lichen acid secreted by lichen and nitric acid secreted by nitrifying bacteria gradually corrode the brick from outside to inside;
3. Frost heaving damage of the infiltrated water causes the surface of the brick to peel off layer by layer;
The above factors can cause the bricks on the brick wall with the long service life to be damaged more or less, but the damages are usually limited to a small area, the bricks on the whole brick wall can not be damaged, and the damages of the water seepage areas such as the wall root (the three damage factors are more or less dependent on water) are usually serious. Repair is also relatively easy, and the existing repair means is usually to repair the damaged brick surface by blending brick powder (ground clay brick) and resin adhesive into repair paste. In the case of the blocks with serious damage, the blocks are broken and detached and replaced by old blocks with the same or similar color (the old blocks are taken from other synchronous buildings, namely the so-called 'detached east wall and west wall'). And after the brick is repaired, re-pointing.
However, the repairing method is not suitable for the clear water brick wall with the surface being universally damaged. If the block-by-block bricks are repaired, even if the blocks are all light injuries which can be repaired by using the repair paste, the workload is huge. If the number of broken bricks is large, the broken bricks are repaired sufficiently to cause the whole wall to be severely damaged or even collapsed in the repairing process. In any case, serious chromatic aberration (i.e., light color of some bricks and dark color of some bricks) is easy to occur due to the fact that the materials for subsequent supplement are more and the age and source are different.
It is not uncommon for the surface of a clear water brick wall to be damaged universally, and the corrosion damage caused by acid rain in the last century results in large-area surface damage to buildings worldwide. In addition, in older plants involving corrosive chemicals, the brick walls are also faced with similar problems. For example, beijing satellite manufacturing plants using the present invention are used to produce satellites, and the propellants required for satellite orbit change are generally corrosive chemicals such as dinitrogen tetroxide, unsymmetrical dimethylhydrazine, hydrazine, fuming nitric acid (the propellants need to be easily reacted in order to achieve multiple in-orbit ignition). The brick walls of the factory building are therefore often exposed to corrosive chemicals, resulting in damage to almost all brick surfaces, difficult construction, easy damage to the building, and easy color differences with conventional brick wall repair means.
Disclosure of Invention
The invention provides a cleaning and repairing method for a surface damaged brick wall without breaking and disassembling and color difference.
The technical problems to be solved are as follows: the clear water brick wall with the surface being universally destroyed is difficult to repair and construct, is easy to damage the building, and is easy to cause chromatic aberration.
In order to solve the technical problems, the invention adopts the following technical scheme: a method for cleaning and repairing a damaged brick wall without breaking and tearing and without color difference, which is used for repairing a brick wall with universal damage on the surface due to corrosion and/or natural weathering, the construction method comprises the following steps:
Step one: measuring the surface strength of the brick wall, formulating a cleaning scheme according to the surface strength, and then finishing the cleaning of the surface of the brick wall, wherein the cleaning schemes at different positions cannot exceed the bearing capacity of the surface of the brick wall at the corresponding positions;
step two: coating a porous repairing agent on the surface of the brick wall to cover the original wall surface and leveling, and marking the positions of transverse brick joints and cracks on the original wall surface on the porous repairing agent, wherein the porous repairing agent meets the following conditions:
Condition 2.1: the color after solidification is consistent with the color after brick cleaning in the brick wall;
Condition 2.2: the components are inorganic matters;
condition 2.3: the porous repairing agent layer can be solidified into porous solid with the pore type of opening, and the solidified porous repairing agent layer is named as a brick-imitating surface layer;
Step three: after the porous repairing agent is solidified, performing high-pressure grouting reinforcement on the brick wall along the marked position in the second step, wherein the grouting material injected into the crack position is cement mortar, and the cement mortar is doped with a suspending agent; the slurry injected at the brick joint is high-permeability epoxy resin grouting liquid, and the high-permeability epoxy resin grouting liquid permeates into capillaries in the brick, hollows in the brick joint and hollows between the brick wall and the imitation brick surface layer during grouting; and seeps into the simulated brick surface layer from the brick wall;
step four: a transverse brick joint is carved on the surface of the imitated brick surface layer by using a steel pipe, a steel bar or a steel bar, then a vertical brick joint is carved, and a pointing agent is used for pointing in the brick joint;
step five: spraying the imitation brick surface layer with the permeable crystalline waterproof paint.
In the first step, a cleaning scheme is formulated according to the Mohs hardness of the surface of the brick in the brick wall, the areas with the Mohs hardness of not lower than 3 are cleaned by high-pressure steam, the areas with the Mohs hardness of lower than 3 are shielded during the high-pressure steam cleaning, and after the high-pressure steam cleaning is finished, the areas are manually brushed, and then the wall surface weathered layer, the scaling and the shell layer on the brick joints are removed.
Further, the porous repairing agent is a paste coating prepared from brick powder, white pumice powder and white cement.
In the third step, cement mortar is firstly punched at intervals at the crack positions, and high-permeability epoxy resin grouting liquid is punched at intervals at the transverse brick crack positions after the cement mortar is solidified;
Grouting cement mortar is performed twice, the pressure is controlled to be 0.2-0.25 MPa, the top end of a crack starts to be provided with vent holes, the cement mortar is poured from bottom to top one by one for the first time, and the cement mortar is refilled from the uppermost grouting hole for the second time; before grouting, injecting clear water with the pressure of 0.2-0.3 MPa into the uppermost grouting hole to moisten the crack;
Grouting the hypertonic epoxy resin grouting liquid along the horizontal direction hole by hole, determining grouting pressure through grouting test, wherein in the grouting test, the grouting pressure meets the following conditions:
condition 3.1: the empty drum in the brick joint can be filled, and the empty drum between the brick wall and the brick imitation surface layer can be filled;
condition 3.2: can penetrate into the simulated brick surface layer by at least two millimeters, and can not completely infiltrate the porous repairing agent;
condition 3.3: the imitation brick surface layer is not broken.
Further, after grouting, grouting holes are plugged by adopting expansion cement mortar.
Further, if a brick with a mechanically damaged main body structure exists in the brick wall, marking the brick joint position above the brick on the porous repairing agent in the second step, and additionally punching grouting holes at the marking position to inject the high-permeability epoxy resin grouting liquid in the third step.
Further, before the porous repairing agent is smeared, a nail is nailed into each transverse brick joint to mark the height of the brick joint, and a PVC hose is inserted into the grouting hole of the crack in the third step; and step four, a laser leveling instrument is used for paying out a horizontal line at the height of the nails to be used as a reference line for forming transverse brick joints.
Further, the cleaning and repairing method further comprises the following step six: the wall surface is worn out.
Compared with the prior art, the cleaning and repairing method for the surface damaged brick wall without breaking and disassembling and without color difference has the following beneficial effects:
According to the invention, broken bricks are not repaired block by block and then are stitched, but a layer of brick-imitating surface layer with the same color and texture as the bricks is directly constructed on the surface of the brick wall, the brick-imitating surface layer is porous, grooves similar to brick seams are easily carved, and the brick seams can be obtained after the plain plaster is stitched. And the slurry which is infiltrated outside can infiltrate into the imitated brick surface layer together when the brick wall is grouting and reinforced, the imitated brick surface layer is firmly fixed on the brick wall, and finally, the surface of the imitated brick surface layer is treated by the infiltration crystalline waterproof coating, so that the residual pores in the imitated brick surface layer are fully filled, and the intensity is obviously improved, and meanwhile, the conventional brick walls are damaged by the corrosion of the immune soluble salt crystal, the biological corrosion and the frost heaving. Meanwhile, the whole repairing process is high in efficiency (one-time repairing of all defects), does not need breaking and disassembling, and does not generate chromatic aberration (because all repairing materials are uniformly paved, chromatic aberration can not occur due to the difference of age and sources of the repairing materials).
Drawings
FIG. 1 is a flow chart of a method for cleaning and repairing damaged surface of a brick wall without breaking and tearing and color difference.
Detailed Description
Taking 11 decoration modification projects (repair of national industrial heritage) of 17 Beijing satellite manufacturing plants and the like and reconstruction projects of Huai-rou Xin xing cement plant as an example, as shown in fig. 1, a cleaning and repairing method of damaged brick walls without breaking and tearing and without color difference is used for repairing brick walls with general damage (namely damage to all bricks) on the surfaces due to corrosion and/or natural weathering, and the construction method comprises the following steps:
Step one: measuring the surface strength of the brick wall, formulating a cleaning scheme according to the surface strength, and then finishing the cleaning of the surface of the brick wall, wherein the cleaning schemes at different positions cannot exceed the bearing capacity of the surface of the brick wall at the corresponding positions;
This step occurs because the cleaning process of the present invention is more rigorous than conventional brick wall repair cleaning. In the invention, as a layer of imitation brick surface layer is additionally constructed on the surface of the brick wall during repairing, all substances which can cause slag inclusion on the surface of the whole brick wall need to be removed. When the cleaning is performed manually, the efficiency is too low and the effect is poor, so that the adopted cleaning mode is high-pressure steam cleaning, and the fact that the cleaning mode is found in practical use sometimes causes an unexpected problem at the beginning, namely, some fragile bricks are crushed when surface sundries are cleaned. Therefore, before cleaning, the lower bricks need to be scratched by a Mohs hardness pen, and the relatively fragile bricks are picked out for shielding.
Step two: the method comprises the steps of coating a porous repairing agent (with variable thickness, uneven root pressing of the brick wall surface due to different brick damage degrees), covering an original wall surface and leveling the original wall surface, and marking the positions of transverse brick seams and cracks on the original wall surface on the porous repairing agent, wherein the porous repairing agent generally needs to ensure that the thickness of the original wall surface is at least 5 mm on the intact brick, and the following conditions are met:
Condition 2.1: the color after solidification is consistent with the color after brick cleaning in the brick wall; this is accomplished by means of color mixing, which is also required in conventional brick wall repair, but only once, to one color in the present invention. The original brick wall may have chromatic aberration, but after the porous repairing agent is cured, the color of the porous repairing agent is consistent with the color of most bricks in the brick wall, and the porous repairing agent is not required to be consistent with the color of all bricks. After construction, the color difference of the original brick wall due to various reasons can be overcome.
The porous repairing agent covers the original wall surface, namely the brick seams (gaps among bricks) and cracks (gaps generated by wall cracking) on the wall, and the follow-up imitation brick surface layer lacks reference if the brick seams are imitated, and the original appearance of the wall is easily lost if the brick seams are engraved at self-selected positions. So here the marking is chosen to be done in advance. In order to reduce the marking workload, only the transverse brick seams are required to be marked, and only the corresponding heights are required to be marked because the transverse brick seams are through seams, and meanwhile, the subsequent grouting is convenient. After the positions of the transverse brick joints are determined, even if the positions of the vertical brick joints deviate from the positions of the original brick joints, the deviation from the original appearance is not obvious.
Condition 2.2: the component is inorganic to ensure weather resistance.
Condition 2.3: the porous repairing agent layer can be solidified into porous solid with the pore type of opening, and the solidified porous repairing agent layer is named as a brick-imitating surface layer;
The open pore, namely the pore communicated with the outside, is used for ensuring that the imitated brick surface layer can be infiltrated by the slurry injected during grouting reinforcement of the brick wall, and can be infiltrated by the subsequent permeable crystalline waterproof coating.
The porous repairing agent is different from the repairing paste prepared by using brick powder and resin in the conventional brick wall repairing, and cannot be firmly connected with the brick wall, and the connection is accomplished by the auxiliary way in the subsequent grouting reinforcement process. The conventional repairing paste is not adopted because the resin has poor weather resistance, and is acceptable if the repairing paste is adopted to repair certain bricks on the wall surface, but the repairing paste is required to repair the whole wall, and the exposed resin can be aged and peeled off quickly.
Conventional brick walls typically require plugging of the upper breach during grouting reinforcement, where plugging is not required because the porous repair agent covers the original wall surface during the previous step.
Step three: after the porous repairing agent is solidified, performing high-pressure grouting reinforcement on the brick wall along the marked position in the second step, wherein the grouting material injected into the crack position is cement mortar, and the cement mortar is doped with a suspending agent; the slurry injected at the brick joint is high-permeability epoxy resin grouting liquid, and the high-permeability epoxy resin grouting liquid permeates into capillaries in the brick, hollows in the brick joint and hollows between the brick wall and the imitation brick surface layer during grouting; and seeps into the simulated brick surface layer from the brick wall;
the porous repairing agent and the brick wall are in fact quite hollow, because the surface of the brick wall is relatively brittle even after cleaning, and even the handle is stained red, so that the porous repairing agent cannot be firmly combined with the porous repairing agent prepared from white cement, brick powder and the like. Therefore, the grouting is selected to enable the brick wall and the porous repairing agent to be penetrated by the slurry and cured together, and the brick wall and the porous repairing agent are integrally formed. The repair of the crack by cementing mortar belongs to the prior art and is not described in detail here.
Step four: a transverse brick joint is carved on the surface of the imitated brick surface layer by using a steel pipe, a steel bar or a steel bar, then a vertical brick joint is carved, and a pointing agent is used for pointing in the brick joint;
the brick-imitating surface layer is in fact very loose concrete with very low strength, and although the inner layer is penetrated by slurry for reinforcement, the outer layer is not penetrated, so that long grooves can be carved on long steel members on the worksite, and then the long grooves are lined with a jointing agent such as lime to imitate the effect consistent with brick joints of the brick wall.
Step five: spraying the imitation brick surface layer with the permeable crystalline waterproof paint.
This step is commonly used for concrete microcrack repair and for improving the waterproofing effect, where the use of a coating material impregnated into the porous material improves the strength of the simulated tile finish in addition to its own effect.
In the first step, a cleaning scheme is formulated according to the Mohs hardness of the surface of the brick in the brick wall, the region of the brick with the Mohs hardness not lower than 3 is cleaned by high-pressure steam, the region of the brick with the Mohs hardness lower than 3 is shielded and treated during the high-pressure steam cleaning, and after the high-pressure steam cleaning is finished, the wall surface weathering layer, the scaling and the shell layer on the brick joint (the scale on the brick joint position and the shell formed by the material of the brick joint are removed, so that grouting is influenced).
Areas with a mohs hardness below 3 are prone to breakage during high pressure steam cleaning, and in this embodiment are selected to be lined with a cement pocket at such a location to shield the high pressure steam.
The porous repairing agent in this embodiment is a paste paint prepared from brick powder, white pumice powder and white cement.
The three component brick powder is used to provide color and smaller voids, the white pumice powder is used to provide larger voids, and the white cement is the binder. White cement, that is, white Portland cement, does not interfere with the color of the porous repairing agent as conventional cement does, and the white cement is not replaced by resin slurry, so that porous substances cannot be formed when the white cement is replaced by the resin slurry, and brick seams are difficult to etch, and weather resistance is also affected. The white pumice powder is white, and the reason for selecting white cement is the same as that of white pumice powder, so that the influence on the color of the porous repairing agent is avoided, and the proportion of brick powder is only required to be adjusted when color mixing is carried out. The proportion of the three components is not fixed, the color is required to meet the requirement, porous substances are formed after curing, and the porous substances are easy to score after curing (curing is not required until the strength reaches 100% after curing, and the porous substances are only required to be finally cured). In the embodiment, the mass ratio of the brick powder to the white pumice powder to the white cement is 5:2:3, and the mixture is mixed with water to form paste and then is smeared.
Step three, firstly punching cement mortar at intervals at the crack positions, and then punching and injecting high-permeability epoxy resin grouting liquid at intervals at the transverse brick crack positions after the cement mortar is solidified;
This is done because the crack location is likely to leak when the hypertonic epoxy resin grouting is applied, and thus it is necessary to apply cement mortar (low fluidity, relatively difficult to leak) first for plugging.
Grouting cement mortar is performed twice, the pressure is controlled to be 0.2-0.25 MPa, the top end of a crack starts to be provided with vent holes, the cement mortar is poured from bottom to top one by one for the first time, and the cement mortar is refilled from the uppermost grouting hole for the second time; and before grouting, injecting clear water with the pressure of 0.2-0.3 MPa into the uppermost grouting hole to moisten the crack.
That is to say, the grouting pressure of the cement mortar is lower, and the leakage of the cement mortar is avoided. The clean water wetting is used for firmly combining the cement mortar with the wall body.
Grouting the hypertonic epoxy resin grouting liquid along the horizontal direction hole by hole, determining grouting pressure through grouting test, wherein in the grouting test, the grouting pressure meets the following conditions:
condition 3.1: the empty drum in the brick joint can be filled, and the empty drum between the brick wall and the brick imitation surface layer can be filled;
Condition 3.2: can penetrate into the brick-imitating surface layer by at least two millimeters so as to ensure firm connection of the brick-preventing surface layer; the porous repairing agent is not completely soaked, so that the surface of the porous repairing agent is not carved to be motionless when a wall seam is carved;
condition 3.3: the imitation brick surface layer is not broken.
After grouting, grouting holes are plugged by adopting expansion cement mortar, so that water leakage of the grouting holes is avoided.
If the brick wall has the brick with the main structure mechanically damaged, marking the brick joint position above the brick on the porous repairing agent in the second step, and additionally punching grouting holes at the marking position to inject the high-permeability epoxy resin grouting liquid in the third step.
Step two, before the porous repairing agent is smeared, a nail is nailed into each transverse brick joint to mark the height of the brick joint, and a PVC hose is inserted into the grouting hole of the crack in the step three; and step four, a laser leveling instrument is used for paying out a horizontal line at the height of the nails to be used as a reference line for forming transverse brick joints.
The marking mode does not leave ink marks on the wall surface.
The cleaning and repairing method further comprises the following step: the wall surface is worn out.
The distressing is not an essential step, and the restored building in this example is in the form of a national industrial heritage, and the restored building looks new and is different from the original appearance, so distressing is required. Distressing is a relatively mature technique and is not described in detail herein.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (8)
1. A cleaning and repairing method for a damaged brick wall without breaking and dismantling and without color difference, which is used for repairing a brick wall with universal damage on the surface due to corrosion and/or natural weathering, and is characterized in that: the cleaning and repairing method comprises the following steps:
Step one: measuring the surface strength of the brick wall, formulating a cleaning scheme according to the surface strength, and then finishing the cleaning of the surface of the brick wall, wherein the cleaning schemes at different positions cannot exceed the bearing capacity of the surface of the brick wall at the corresponding positions;
step two: coating a porous repairing agent on the surface of the brick wall to cover the original wall surface and leveling, and marking the positions of transverse brick joints and cracks on the original wall surface on the porous repairing agent, wherein the porous repairing agent meets the following conditions:
Condition 2.1: the color after solidification is consistent with the color after brick cleaning in the brick wall;
Condition 2.2: the components are inorganic matters;
condition 2.3: the porous repairing agent layer can be solidified into porous solid with the pore type of opening, and the solidified porous repairing agent layer is named as a brick-imitating surface layer;
Step three: after the porous repairing agent is solidified, performing high-pressure grouting reinforcement on the brick wall along the marked position in the second step, wherein the grouting material injected into the crack position is cement mortar, and the cement mortar is doped with a suspending agent; the slurry injected at the brick joint is high-permeability epoxy resin grouting liquid, and the high-permeability epoxy resin grouting liquid permeates into capillaries in the brick, hollows in the brick joint and hollows between the brick wall and the imitation brick surface layer during grouting; and seeps into the simulated brick surface layer from the brick wall;
step four: a transverse brick joint is carved on the surface of the imitated brick surface layer by using a steel pipe, a steel bar or a steel bar, then a vertical brick joint is carved, and a pointing agent is used for pointing in the brick joint;
step five: spraying the imitation brick surface layer with the permeable crystalline waterproof paint.
2. The method for cleaning and repairing the damaged surface of the brick wall without breaking and disassembling and without color difference according to claim 1, which is characterized by comprising the following steps: in the first step, a cleaning scheme is formulated according to the Mohs hardness of the surface of the brick in the brick wall, the region of the brick with the Mohs hardness not lower than 3 is cleaned by high-pressure steam, the region of the brick with the Mohs hardness lower than 3 is shielded during the high-pressure steam cleaning, and after the high-pressure steam cleaning is finished, the brick is manually brushed, and then a wall surface weathered layer, a scaling and a shell layer on a brick joint are removed.
3. The method for cleaning and repairing the damaged surface of the brick wall without breaking and disassembling and without color difference according to claim 1, which is characterized by comprising the following steps: the porous repairing agent is a paste coating prepared from brick powder, white pumice powder and white cement.
4. The method for cleaning and repairing the damaged surface of the brick wall without breaking and disassembling and without color difference according to claim 1, which is characterized by comprising the following steps: step three, firstly punching cement mortar at intervals at the crack positions, and then punching and injecting high-permeability epoxy resin grouting liquid at intervals at the transverse brick crack positions after the cement mortar is solidified;
Grouting cement mortar is performed twice, the pressure is controlled to be 0.2-0.25 MPa, the top end of a crack starts to be provided with vent holes, the cement mortar is poured from bottom to top one by one for the first time, and the cement mortar is refilled from the uppermost grouting hole for the second time; before grouting, injecting clear water with the pressure of 0.2-0.3 MPa into the uppermost grouting hole to moisten the crack;
Grouting the hypertonic epoxy resin grouting liquid along the horizontal direction hole by hole, determining grouting pressure through grouting test, wherein in the grouting test, the grouting pressure meets the following conditions:
condition 3.1: the empty drum in the brick joint can be filled, and the empty drum between the brick wall and the brick imitation surface layer can be filled;
condition 3.2: can penetrate into the simulated brick surface layer by at least two millimeters, and can not completely infiltrate the porous repairing agent;
condition 3.3: the imitation brick surface layer is not broken.
5. The method for cleaning and repairing the damaged surface of the brick wall without breaking and tearing and without color difference according to claim 4, which is characterized by comprising the following steps: after grouting, grouting holes are plugged by adopting expansion cement mortar.
6. The method for cleaning and repairing the damaged surface of the brick wall without breaking and tearing and without color difference according to claim 4, which is characterized by comprising the following steps: if the brick wall has the brick with the main structure mechanically damaged, marking the brick joint position above the brick on the porous repairing agent in the second step, and additionally punching grouting holes at the marking position to inject the high-permeability epoxy resin grouting liquid in the third step.
7. The method for cleaning and repairing the damaged surface of the brick wall without breaking and disassembling and without color difference according to claim 1, which is characterized by comprising the following steps: step two, before the porous repairing agent is smeared, a nail is nailed into each transverse brick joint to mark the height of the brick joint, and a PVC hose is inserted into the grouting hole of the crack in the step three; and step four, a laser leveling instrument is used for paying out a horizontal line at the height of the nails to be used as a reference line for forming transverse brick joints.
8. The method for cleaning and repairing the damaged surface of the brick wall without breaking and disassembling and without color difference according to claim 1, which is characterized by comprising the following steps: the cleaning and repairing method further comprises the following step: the wall surface is worn out.
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