CN115467550A - Concrete crack repairing method - Google Patents
Concrete crack repairing method Download PDFInfo
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- CN115467550A CN115467550A CN202211115688.9A CN202211115688A CN115467550A CN 115467550 A CN115467550 A CN 115467550A CN 202211115688 A CN202211115688 A CN 202211115688A CN 115467550 A CN115467550 A CN 115467550A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000000428 dust Substances 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000007667 floating Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000007781 pre-processing Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 239000003292 glue Substances 0.000 claims description 32
- 239000002985 plastic film Substances 0.000 claims description 28
- 229920006255 plastic film Polymers 0.000 claims description 28
- 239000003822 epoxy resin Substances 0.000 claims description 24
- 229920000647 polyepoxide Polymers 0.000 claims description 24
- 239000000243 solution Substances 0.000 claims description 22
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000008439 repair process Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 9
- 230000010412 perfusion Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000012466 permeate Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000009715 pressure infiltration Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
- E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a concrete crack repairing method, which comprises the following steps: s1, preprocessing a crack; s2, crack pouring; s3, sealing the crack; and S4, maintaining. The method solves the problem that floating dust and dust in the crack are not cleaned in the traditional crack repairing process, and guarantees the groutability of the crack from the source.
Description
Technical Field
The invention relates to the technical field of civil engineering. More specifically, the invention relates to a concrete crack repairing method.
Background
The concrete is a building material with the largest application amount and the widest application range in the field of modern civil engineering, however, most of the concrete is exposed to the outdoor environment for a long time, and the concrete is of a porous structure, water and ions can permeate into the concrete through pores of the concrete to cause diseases such as concrete mildewing, carbonization, cracking and the like, the existence of cracks can further cause steel bar corrosion, the normal use of a concrete structure is seriously influenced, the bearing capacity of the concrete structure is reduced, and the structural damage of the concrete is possibly caused, so that the cracks need to be treated in time.
At present, the method for repairing concrete cracks mainly comprises the following steps:
1. the surface sealing method comprises the steps of cutting a groove along the direction of a crack through equipment, removing impurities of the crack through a steel brush according to the position of the groove, cleaning two sides of the crack, scraping the crack and pressing a joint sealing glue to repair the crack;
2. an automatic low-pressure infiltration injection method is characterized in that after the surface of a crack is treated, grouting nozzles are fixedly adhered along the center of the crack at set intervals, an infiltration injector filled with liquid is screwed and inserted on each grouting nozzle, and the crack is continuously infiltrated by the pressure borne by the liquid, so that the crack is repaired;
3. the pressure perfusion method is characterized in that after the cracks are treated, grouting nozzles are arranged along the direction of the cracks, and grouting is carried out in the cracks through the grouting nozzles so as to repair the cracks;
the three methods do not treat the interior of the crack, and when more dust and dust exists in the crack, the subsequent pouring and sealing effects are not ideal, and the repairing effect on the concrete crack is influenced finally.
Disclosure of Invention
The invention also aims to provide a concrete crack repairing method which can solve the problem that floating dust and dust in the crack are not cleaned in the traditional crack repairing process and ensure the groutability of the crack from the source.
To achieve these objects and other advantages in accordance with the present invention, there is provided a concrete crack repairing method including the steps of:
s1, preprocessing cracks;
s11, cleaning floating dust on the surfaces of the cracks by using high-pressure air;
s12, arranging a filling device at the left end of the crack, and filling water into the filling device, wherein the water automatically flows into the crack under the action of self gravity;
s13, arranging a plurality of vacuumizing points at intervals at the crack along the length direction of the crack, wherein a vacuumizing device is arranged on any vacuumizing point, the vacuumizing points are sequentially vacuumized from left to right while water flows into the crack, and after the vacuumizing device pumps water, the operation is stopped, and vacuumizing at the next vacuumizing point is performed until the whole crack is filled with water;
s14, continuously filling water and performing negative pressure vacuumizing at the last vacuumizing point until the vacuumizing device extracts water;
s15, pressing high-pressure air into the crack at the position of the filling device by adopting an air compressor, and continuously vacuumizing the crack by using a vacuumizing device under negative pressure until no water is pumped out of the crack;
s16, covering the crack with a film, and performing subsequent operation after the crack is dried for 5-7 days;
s2, pouring cracks;
replacing water in the filling device with epoxy resin glue, and repeating the steps S11-S13;
s3, sealing the crack;
when the surface of the crack is fully distributed with the glue solution, a plastic film is adopted to cover the crack, and the contact part of the plastic film and the concrete surface is fully filled with the glue solution;
s4, maintaining;
and continuously pouring the epoxy resin adhesive and vacuumizing for 1min, when no cavity is formed in the contact part of the plastic film and the concrete surface, closing the vacuumizing device, keeping more than half of the epoxy resin adhesive in the pouring device, and after the epoxy resin adhesive in the crack is cured, keeping the on-site continuous curing for 7d and then opening.
Preferably, in step S2, when the epoxy resin adhesive is poured into the crack, the contact surface tension T of the epoxy resin adhesive and the contact angle θ of the concrete should satisfy 0.05 ≤ 2Tcos θ.
Preferably, in the step S3, when the crack surface is not covered with the glue solution, the glue solution is applied to the crack surface by using an injection device, then the crack is covered with a plastic film from left to right, and the observation is performed while covering, when the covered contact portion of the plastic film and the concrete surface is hollow, the plastic film is lifted and continuously filled with the glue solution, and then the plastic film is covered again until the whole crack is covered and the contact portion of the plastic film and the concrete surface is filled with the glue solution.
Preferably, the thickness of the plastic film is not less than 0.05mm.
Preferably, in the step S13, the vacuum-pumping negative pressure is 0-0.1MPa; in step S15, the pressure of the high-pressure air is not lower than 2MPa.
Preferably, in step S12, the perfusion is assisted by using a pressure of 0-10 MPa.
Preferably, in the step S12, a contact portion of the bottom of the pouring device and the concrete surface is in a sealed state.
Preferably, in the process of repairing the crack, the crack is reinforced by adopting a method of reinforcing by adhering a carbon fiber sheet material, so that the crack is prevented from secondary cracking in the process of repairing the crack.
The invention at least comprises the following beneficial effects:
1. the method solves the problem that floating dust and dust in the crack are not cleaned in the traditional crack repairing process, and guarantees the perfusability of the crack from the source;
2. according to the invention, by setting the contact angle between the pouring material and the concrete, the pouring material can permeate into the crack under the action of self gravity under the condition of no pressure, so that the pourability of the crack is further ensured;
3. the crack repairing method is a great innovation of the traditional crack repairing method, provides a reasonable and effective repairing technology for concrete engineering cracks, is suitable for repairing concrete in various scenes, and can greatly reduce structural risks.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic diagram of the arrangement position of the vacuum-pumping points according to the present invention;
FIG. 2 is a schematic view of the perfusion process of the present invention;
FIG. 3 is a schematic view of the completion of perfusion according to the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 3, the present invention provides a concrete crack repairing method, comprising the steps of:
s1, preprocessing a crack;
s11, cleaning floating dust on the surface of the crack by using high-pressure air to prevent the floating dust on the surface of the crack from falling into the crack in the subsequent construction process to influence the repairing effect;
s12, arranging a filling device at the left end of the crack, and filling water into the filling device, wherein the water automatically flows into the crack under the action of self gravity; irrigating water into the crack for flushing impurities in the crack;
s13, as shown in the figure 1, a plurality of vacuumizing points are arranged at intervals at the crack along the length direction of the crack, a vacuumizing device is arranged on any vacuumizing point, negative pressure vacuumizing is performed on the vacuumizing points from left to right while water flows into the crack, after the vacuumizing device pumps water, the operation is stopped, and vacuumizing is performed on the next vacuumizing point until the whole crack is filled with water, as shown in the figure 3; water is poured into the cracks through the filling device, and the vacuumizing devices on the surfaces of the cracks are matched for sequentially vacuumizing, so that the whole cracks can be quickly filled with water, and the construction efficiency is improved;
s14, continuously filling water and performing negative pressure vacuumizing at the last vacuumizing point until the vacuumizing device extracts water; after the crack is filled with water, negative pressure vacuumizing is carried out at the last vacuumizing point, so that water with impurities is pumped out of the crack to prepare for subsequent filling of epoxy resin adhesive;
s15, pressing high-pressure air into the crack at the position of the filling device by adopting an air compressor, and continuously vacuumizing the crack by adopting a vacuumizing device under negative pressure until no water is pumped out from the crack; high-pressure air is pressed into one end of the crack through a high-pressure machine, the vacuumizing device continuously vacuumizes the other end of the crack, and the high-pressure machine and the vacuumizing device are matched with each other to accelerate water in the crack to be discharged out of the crack and accelerate construction efficiency;
s16, covering the crack with a film with dustproof and permeable effects, and performing subsequent operation after the crack is dried for 5-7 days;
s2, crack pouring;
replacing water in the filling device with epoxy resin glue, and repeating the steps S11-S13; the epoxy resin adhesive is one capable of being cured on a wet surface, when a crack exists on a wet part, the epoxy resin adhesive has the function of curing on the wet surface, the crack can be well sealed, the repairing effect of the crack is ensured, and in order to ensure the subsequent repairing effect, the strength of the selected epoxy resin adhesive needs to be greater than that of the repaired concrete crack;
s3, sealing the crack;
when the surface of the crack is fully distributed with the glue solution, covering the crack by adopting a plastic film, and filling the glue solution on the contact part of the plastic film and the concrete surface;
s4, maintaining;
and continuously pouring epoxy resin glue and vacuumizing for 1min, closing the vacuumizing device when no cavity is formed in the contact part of the plastic film and the concrete surface, preserving more than half of the epoxy resin glue in the pouring device, and keeping the epoxy resin glue open after continuous maintenance on site for 7 d. The method pretreats the crack, solves the problem that floating dust and dust in the crack are not cleaned in the traditional crack repairing process, ensures the pouring performance of the crack from the source, ensures the repairing effect, provides a reasonable and effective repairing technology for the crack of the concrete engineering, is suitable for concrete repairing of various scenes, and can greatly reduce the structural risk.
In another technical scheme, in the step S2, when the epoxy resin adhesive is poured into the crack, the contact surface tension T of the epoxy resin adhesive and the contact angle θ of the concrete should satisfy 0.05 ≤ 2Tcos θ.
In the technical scheme, the contact angle between the pouring material and the concrete is set, so that the epoxy resin can permeate into the crack under the action of the self gravity under the condition of no pressure, and the pourability of the crack is further ensured.
In another technical scheme, in the step S3, when the crack surface is not covered with the glue solution, the glue solution is applied to the crack surface by using an injection device, then the crack is covered with a plastic film from left to right, and observation is performed while covering, when a cavity appears in the contact part of the covered plastic film and the concrete surface, the plastic film is lifted to continue to be filled with the glue solution and then is covered again until the whole crack is covered and the contact part of the plastic film and the concrete surface is filled with the glue solution.
In the technical scheme, in order to ensure that the glue solution in the crack is fully filled, the surface of the crack needs to be fully distributed with the glue solution under the condition that the inside of the crack is fully filled with the glue solution, and when a contact part of the plastic film and the concrete surface is hollow, the contact part is possibly caused by the non-full filling, so that the film needs to be covered again after the glue solution is fully filled again, and the repairing effect of the follow-up crack is ensured.
In another technical scheme, the thickness of the plastic film is not less than 0.05mm.
In another technical scheme, in the step S13, the vacuum-pumping negative pressure is 0-0.1MPa; in step S15, the pressure of the high-pressure air is not lower than 2MPa.
In another technical scheme, in the step S12, the pressure of 0-10Mpa is adopted for auxiliary perfusion.
In the technical scheme, the epoxy resin adhesive can be ensured to be injected into the tiny part of the crack by pressure-assisted continuous filling, and the filling effect is further improved.
In another technical scheme, in the step S12, a contact portion of the bottom of the pouring device and the concrete surface is in a sealed state.
In this technical scheme, the perfusion device bottom is sealed with the concrete face, can guarantee that the material in the perfusion device can not follow contact surface and flow out, influences follow-up operation.
In another technical scheme, in the repairing process of the crack, a reinforcing method of adhering carbon fiber sheet materials is adopted to reinforce the crack, so that the crack is prevented from secondary cracking in the repairing process.
While embodiments of the invention have been described above, it is not intended to be limited to the details shown, described and illustrated herein, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed, and to such extent that such modifications are readily available to those skilled in the art, and it is not intended to be limited to the details shown and described herein without departing from the general concept as defined by the appended claims and their equivalents.
Claims (8)
1. A concrete crack repairing method is characterized by comprising the following steps:
s1, preprocessing a crack;
s11, cleaning floating dust on the surface of the crack by using high-pressure air;
s12, arranging a filling device at the left end of the crack, and filling water into the filling device, wherein the water automatically flows into the crack under the action of self gravity;
s13, arranging a plurality of vacuumizing points at intervals at the crack along the length direction of the crack, wherein a vacuumizing device is arranged on any vacuumizing point, the vacuumizing points are sequentially vacuumized in a negative pressure manner from left to right when water flows into the crack, and after the vacuumizing device extracts water, the operation is stopped, and vacuumizing at the next vacuumizing point is performed until the whole crack is filled with water;
s14, continuously filling water and performing negative pressure vacuumizing at the last vacuumizing point until the vacuumizing device extracts water;
s15, pressing high-pressure air into the crack at the position of the filling device by adopting an air compressor, and continuously vacuumizing the crack by adopting a vacuumizing device under negative pressure until no water is pumped out from the crack;
s16, covering the crack with a film, and performing subsequent operation after the crack is dried for 5-7 days;
s2, crack pouring;
replacing water in the filling device with epoxy resin glue, and repeating the steps S11-S13;
s3, sealing the crack;
when the surface of the crack is fully distributed with the glue solution, a plastic film is adopted to cover the crack, and the contact part of the plastic film and the concrete surface is fully filled with the glue solution;
s4, maintaining;
and continuously pouring the epoxy resin glue and vacuumizing for 1min, closing the vacuumizing device when no cavity is formed in the contact part of the plastic film and the concrete surface, keeping more than half of the epoxy resin glue in the pouring device, and keeping the spot open after continuously maintaining for 7d after the epoxy resin glue in the crack is cured.
2. The method for repairing concrete cracks according to claim 1, wherein in the step S2, when the epoxy resin adhesive is poured into the cracks, the contact surface tension T of the epoxy resin adhesive and the contact angle θ of the concrete should satisfy 0.05 ≤ 2Tcos θ.
3. The method for repairing concrete cracks according to claim 1, wherein in step S3, when the crack surface is not filled with the glue solution, the glue solution is applied to the crack surface by using an injection device, then the crack is covered with a plastic film from left to right, and the plastic film is observed while covering, when the covered portion of the plastic film in contact with the concrete surface is hollow, the plastic film is lifted and continuously filled with the glue solution, and then the plastic film is covered again until the whole crack is covered and the portion of the plastic film in contact with the concrete surface is filled with the glue solution.
4. A concrete crack repair method as claimed in claim 3, characterized in that the thickness of the plastic film is not less than 0.05mm.
5. The concrete crack repairing method according to claim 1, wherein in the step S13, the vacuuming negative pressure is 0-0.1MPa; in step S15, the pressure of the high-pressure air is not lower than 2MPa.
6. The method for repairing concrete cracks according to claim 1, wherein in step S12, the pressure of 0-10Mpa is used for auxiliary pouring.
7. The concrete crack repairing method according to claim 1, wherein in the step S12, a contact portion of the bottom of the pouring device and the concrete surface is in a sealed state.
8. The method for repairing concrete cracks as claimed in claim 1, wherein in the process of repairing the cracks, the cracks are reinforced by a method of reinforcing by adhering carbon fiber sheet materials, so that the cracks are prevented from secondary cracking in the process of repairing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211115688.9A CN115467550A (en) | 2022-09-14 | 2022-09-14 | Concrete crack repairing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211115688.9A CN115467550A (en) | 2022-09-14 | 2022-09-14 | Concrete crack repairing method |
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| CN115467550A true CN115467550A (en) | 2022-12-13 |
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| CN202211115688.9A Pending CN115467550A (en) | 2022-09-14 | 2022-09-14 | Concrete crack repairing method |
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