CN113293797A - Method for repairing concrete cracks - Google Patents
Method for repairing concrete cracks Download PDFInfo
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- CN113293797A CN113293797A CN202110622125.8A CN202110622125A CN113293797A CN 113293797 A CN113293797 A CN 113293797A CN 202110622125 A CN202110622125 A CN 202110622125A CN 113293797 A CN113293797 A CN 113293797A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Materials Engineering (AREA)
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Abstract
The invention discloses a method for repairing a concrete crack, which comprises the following steps: cleaning cracks: detecting the depth and the width of the crack by using equipment, cleaning the ground near the crack, when the opening at the top of the crack is less than 5 mm, cutting a groove with the width of 0.5cm-1cm along the crack, and cleaning the inner wall of the crack by using a high-pressure water gun and a high-pressure air gun; preparing slurry: mixing and preparing a filling material according to a proportion, wherein the filling material comprises 50-55 parts of cement, 25-28 parts of fly ash, 10-12 parts of quartz sand, 2-5 parts of epoxy resin glue, 1-1.2 parts of redispersible latex powder, 0.5-1.5 parts of water reducing agent and 0.2-0.6 part of retarder; the filling slurry with strong viscosity is prepared by cement, fly ash, silica fume, epoxy resin glue, redispersible latex powder, a water reducing agent, a retarder and the like, the filling slurry is filled for three times, the filling slurry is fully filled in each corner of a crack by using vibration equipment and air pressure, and a cavity is prevented from being generated in the crack.
Description
Technical Field
The invention belongs to the technical field of building structures, and particularly relates to a method for repairing a concrete crack.
Background
Concrete cracks are common in our lives, and various methods for repairing the cracks are provided, for example, patent application No. 201711405643.4 discloses a method and a tool for repairing internal cracks of concrete.
However, the method for repairing the underground pipe gallery concrete crack has some problems, for example, the method is completed by one-time pouring, slurry enters the crack, meets a small gap at the bottom and is not ready for settlement and filling, and a plurality of small cavities are easily generated in the crack, so that the repair strength of the crack is affected.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a method for repairing concrete cracks.
The invention provides a concrete crack repairing method, which comprises the following steps:
step 1: cleaning cracks: detecting the depth and the width of the crack by using equipment, cleaning the ground near the crack, when the opening at the top of the crack is less than 5 mm, cutting a groove with the width of 0.5cm-1cm along the crack, and cleaning the inner wall of the crack by using a high-pressure water gun and a high-pressure air gun;
step 2: preparing slurry: mixing and preparing a filling material according to a proportion, wherein the filling material comprises 50-55 parts of cement, 25-28 parts of fly ash, 10-12 parts of quartz sand, 2-5 parts of epoxy resin glue, 1-1.2 parts of redispersible latex powder, 0.5-1.5 parts of water reducing agent and 0.2-0.6 part of retarder, adding the cement, the fly ash, the silica fume, the epoxy resin glue, the redispersible latex powder, the water reducing agent and the retarder into a stirring device, and then adding a proper amount of water to uniformly mix so as to obtain filling slurry;
and step 3: primary perfusion: filling slurry into the crack gradually through filling equipment, stopping filling when the slurry is filled to one third of the crack, applying vibration to the vicinity of a crack filling area by using small-sized vibration equipment, discharging air to avoid generating a cavity, and blowing and applying pressure to an air nozzle communicated with an air tank aiming at the slurry in the crack after vibration is finished;
and 4, step 4: and (3) completing the repair: and (3) performing secondary pouring by using a pouring device, stopping pouring when the filling slurry reaches the height of two thirds of the crack, applying vibration to a crack pouring area by using a small-sized vibrating device, stopping vibrating for 30 seconds, and then performing the last pouring by using the pouring device until the filling slurry fills the crack.
Preferably, in step 1, the soil, oil stains and other attachments which affect filling on the ground around the crack are cleaned, and loose concrete on the ground near the cleaning groove needs to be checked after the grooving is finished.
Preferably, in step 1, the cross section of the groove is in a V-shaped structure, and the depth of the groove is controlled to be 1 cm.
Preferably, in the step 2, the filling material comprises the following components by weight: 50 parts of cement, 28 parts of fly ash, 10 parts of quartz sand, 5 parts of epoxy resin glue, 1 part of redispersible latex powder, 1 part of water reducing agent and 0.5 part of retarder.
Preferably, in the step 2, the quartz sand is 200-mesh quartz sand, and the water reducing agent is a polycarboxyl water reducing agent.
Preferably, in step 3, the settlement of the filling slurry inside the crack is concerned in the vibration process, and when the filling slurry does not settle any more, the vibration is continued for 5 seconds.
Preferably, in step 3, the small vibration device is a small pneumatic knocking hammer, and when the small vibration device is operated, the small vibration device moves along the direction of the crack in the filling area.
Preferably, in step 3, when the air nozzle is used, the air nozzle needs to move along the crack of the filling area to blow three times, and when the filling slurry is settled, pressure is applied to the area by blowing.
Preferably, in step 4, glue is applied to the inner wall of the groove, and then the last pouring is performed.
Preferably, in step 4, after the pouring is completed, the small-sized vibration equipment is pressed to move and vibrate along the poured crack, and after the vibration is completed, the tool is used for dipping the residual filling slurry to smooth the crack area.
The invention has the beneficial effects that: firstly, a groove is formed in the top of a crack, so that slurry filling is facilitated, then filling slurry with strong viscosity is prepared by cement, fly ash, silica fume, epoxy resin glue, redispersible latex powder, a water reducing agent, a retarder and the like, filling is divided into three times during pouring and repairing, each corner of the crack is fully filled with the filling slurry by using vibration equipment and air pressure, a cavity is prevented from being formed in the crack, and the strength of a repairing position is enhanced.
Drawings
Fig. 1 is a flow chart of the present invention.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Referring to FIG. 1, the first embodiment
The embodiment provides a method for repairing a concrete crack, which comprises the following steps:
step 1: cleaning cracks: detecting the depth and the width of a crack by using equipment, cleaning the ground near the crack, when an opening at the top of the crack is smaller than 5 mm, cutting a groove with the width of 0.5cm-1cm along the crack, wherein the section of the groove is of a V-shaped structure, the depth of the groove is controlled to be 1cm, cleaning the inner wall of the crack by using a high-pressure water gun and a high-pressure air gun, cleaning attachments which influence filling, such as soil, oil stain and the like on the ground around the crack, and detecting and cleaning loose concrete on the ground near the groove after the grooving is finished;
step 2: preparing slurry: mixing and preparing a filling material according to a proportion, wherein the filling material is composed of 55 parts of cement, 25 parts of fly ash, 12 parts of quartz sand, 2 parts of epoxy resin glue, 1.2 parts of redispersible latex powder, 0.5 part of water reducing agent and 0.2 part of retarder, the quartz sand is 200-mesh quartz sand, the water reducing agent is a polycarboxyl water reducing agent, the cement, the fly ash, silica fume, the epoxy resin glue, the redispersible latex powder, the water reducing agent and the retarder are added into a stirring device, and then a proper amount of water is added to be uniformly mixed, so that filling slurry is obtained;
and step 3: primary perfusion: filling grout is gradually filled into the crack through filling equipment, the filling is stopped when the grout is filled to one third of the crack, small-sized vibration equipment is used for applying vibration to the position near a crack filling area, the settlement of the grout filled in the crack is concerned in the vibration process, when the grout is not settled any more, the vibration is continued for 5 seconds, cavities are avoided, the small-sized vibration equipment is a small-sized pneumatic knocking hammer, during operation, the equipment is enabled to move along the trend of the crack in the filling area, after the vibration is finished, an air nozzle communicated with an air tank is blown and applied pressure by aiming at the grout filled in the crack, when the air nozzle is used, the air nozzle needs to move and blow along the trend of the crack in the filling area for three times, and when the grout is settled, the pressure is blown and applied to the area in a key mode;
and 4, step 4: and (3) completing the repair: use filling equipment to carry out the second time and fill, when filling the thick liquid and reach the crack two-thirds height, stop filling, use small-size vibrating equipment to fill the crack and fill the regional vibration of applying, the vibration 30 seconds stops, paint the inner wall at the recess with glue, then, use filling equipment to carry out the last time and fill, fill the crack up to filling the thick liquid, fill and accomplish the back, the small-size vibrating equipment of exerting pressure removes the vibration along the crack that fills, after the vibration is accomplished, use the instrument to be stained with remaining filling thick liquid and smooth the crack region.
Referring to FIG. 1, example II
The embodiment provides a method for repairing a concrete crack, which comprises the following steps:
step 1: cleaning cracks: detecting the depth and the width of a crack by using equipment, cleaning the ground near the crack, when an opening at the top of the crack is smaller than 5 mm, cutting a groove with the width of 0.5cm-1cm along the crack, wherein the section of the groove is of a V-shaped structure, the depth of the groove is controlled to be 1cm, cleaning the inner wall of the crack by using a high-pressure water gun and a high-pressure air gun, cleaning attachments which influence filling, such as soil, oil stain and the like on the ground around the crack, and detecting and cleaning loose concrete on the ground near the groove after the grooving is finished;
step 2: preparing slurry: mixing and preparing a filling material according to a proportion, wherein the filling material is composed of 53 parts of cement, 26 parts of fly ash, 11 parts of quartz sand, 4 parts of epoxy resin glue, 1.1 parts of redispersible latex powder, 0.7 part of water reducing agent and 0.4 part of retarder, the quartz sand is 200-mesh quartz sand, the water reducing agent is a polycarboxyl water reducing agent, the cement, the fly ash, silica fume, the epoxy resin glue, the redispersible latex powder, the water reducing agent and the retarder are added into a stirring device, and then a proper amount of water is added to be uniformly mixed, so that filling slurry is obtained;
and step 3: primary perfusion: filling grout is gradually filled into the crack through filling equipment, the filling is stopped when the grout is filled to one third of the crack, small-sized vibration equipment is used for applying vibration to the position near a crack filling area, the settlement of the grout filled in the crack is concerned in the vibration process, when the grout is not settled any more, the vibration is continued for 5 seconds, cavities are avoided, the small-sized vibration equipment is a small-sized pneumatic knocking hammer, during operation, the equipment is enabled to move along the trend of the crack in the filling area, after the vibration is finished, an air nozzle communicated with an air tank is blown and applied pressure by aiming at the grout filled in the crack, when the air nozzle is used, the air nozzle needs to move and blow along the trend of the crack in the filling area for three times, and when the grout is settled, the pressure is blown and applied to the area in a key mode;
and 4, step 4: and (3) completing the repair: use filling equipment to carry out the second time and fill, when filling the thick liquid and reach the crack two-thirds height, stop filling, use small-size vibrating equipment to fill the crack and fill the regional vibration of applying, the vibration 30 seconds stops, paint the inner wall at the recess with glue, then, use filling equipment to carry out the last time and fill, fill the crack up to filling the thick liquid, fill and accomplish the back, the small-size vibrating equipment of exerting pressure removes the vibration along the crack that fills, after the vibration is accomplished, use the instrument to be stained with remaining filling thick liquid and smooth the crack region.
Referring to FIG. 1, example III
The embodiment provides a method for repairing a concrete crack, which comprises the following steps:
step 1: cleaning cracks: detecting the depth and the width of a crack by using equipment, cleaning the ground near the crack, when an opening at the top of the crack is smaller than 5 mm, cutting a groove with the width of 0.5cm-1cm along the crack, wherein the section of the groove is of a V-shaped structure, the depth of the groove is controlled to be 1cm, cleaning the inner wall of the crack by using a high-pressure water gun and a high-pressure air gun, cleaning attachments which influence filling, such as soil, oil stain and the like on the ground around the crack, and detecting and cleaning loose concrete on the ground near the groove after the grooving is finished;
step 2: preparing slurry: mixing and preparing a filling material according to a proportion, wherein the filling material is composed of 50 parts of cement, 28 parts of fly ash, 10 parts of quartz sand, 5 parts of epoxy resin glue, 1 part of redispersible latex powder, 1 part of water reducing agent and 0.5 part of retarder, the quartz sand is 200-mesh quartz sand, the water reducing agent is a polycarboxylic water reducing agent, the cement, the fly ash, silica fume, the epoxy resin glue, the redispersible latex powder, the water reducing agent and the retarder are added into a stirring device, and then a proper amount of water is added to be uniformly mixed, so that filling slurry is obtained;
and step 3: primary perfusion: filling grout is gradually filled into the crack through filling equipment, the filling is stopped when the grout is filled to one third of the crack, small-sized vibration equipment is used for applying vibration to the position near a crack filling area, the settlement of the grout filled in the crack is concerned in the vibration process, when the grout is not settled any more, the vibration is continued for 5 seconds, cavities are avoided, the small-sized vibration equipment is a small-sized pneumatic knocking hammer, during operation, the equipment is enabled to move along the trend of the crack in the filling area, after the vibration is finished, an air nozzle communicated with an air tank is blown and applied pressure by aiming at the grout filled in the crack, when the air nozzle is used, the air nozzle needs to move and blow along the trend of the crack in the filling area for three times, and when the grout is settled, the pressure is blown and applied to the area in a key mode;
and 4, step 4: and (3) completing the repair: use filling equipment to carry out the second time and fill, when filling the thick liquid and reach the crack two-thirds height, stop filling, use small-size vibrating equipment to fill the crack and fill the regional vibration of applying, the vibration 30 seconds stops, paint the inner wall at the recess with glue, then, use filling equipment to carry out the last time and fill, fill the crack up to filling the thick liquid, fill and accomplish the back, the small-size vibrating equipment of exerting pressure removes the vibration along the crack that fills, after the vibration is accomplished, use the instrument to be stained with remaining filling thick liquid and smooth the crack region.
Comparing conventional and prepared examples one to three, the following table was prepared for examples one to three:
from the above table, it can be seen that the present invention is a significant improvement and is implemented in three preferred embodiments.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The method for repairing the concrete cracks is characterized by comprising the following steps:
step 1: cleaning cracks: detecting the depth and the width of the crack by using equipment, cleaning the ground near the crack, when the opening at the top of the crack is less than 5 mm, cutting a groove with the width of 0.5cm-1cm along the crack, and cleaning the inner wall of the crack by using a high-pressure water gun and a high-pressure air gun;
step 2: preparing slurry: mixing and preparing a filling material according to a proportion, wherein the filling material comprises 50-55 parts of cement, 25-28 parts of fly ash, 10-12 parts of quartz sand, 2-5 parts of epoxy resin glue, 1-1.2 parts of redispersible latex powder, 0.5-1.5 parts of water reducing agent and 0.2-0.6 part of retarder, adding the cement, the fly ash, the silica fume, the epoxy resin glue, the redispersible latex powder, the water reducing agent and the retarder into a stirring device, and then adding a proper amount of water to uniformly mix so as to obtain filling slurry;
and step 3: primary perfusion: filling slurry into the crack gradually through filling equipment, stopping filling when the slurry is filled to one third of the crack, applying vibration to the vicinity of a crack filling area by using small-sized vibration equipment, discharging air to avoid generating a cavity, and blowing and applying pressure to an air nozzle communicated with an air tank aiming at the slurry in the crack after vibration is finished;
and 4, step 4: and (3) completing the repair: and (3) performing secondary pouring by using a pouring device, stopping pouring when the filling slurry reaches the height of two thirds of the crack, applying vibration to a crack pouring area by using a small-sized vibrating device, stopping vibrating for 30 seconds, and then performing the last pouring by using the pouring device until the filling slurry fills the crack.
2. The method for repairing concrete cracks according to claim 1, wherein in step 1, soil, oil and other substances affecting filling on the ground around the cracks are cleaned, and loose concrete on the ground near the cleaning grooves needs to be checked after the grooving is finished.
3. The method for repairing concrete cracks according to claim 1, wherein in the step 1, the cross section of the groove is in a V-shaped structure, and the depth of the groove is controlled to be 1 cm.
4. The method for repairing concrete cracks according to claim 1, wherein in the step 2, the filling material comprises the following components by weight: 50 parts of cement, 28 parts of fly ash, 10 parts of quartz sand, 5 parts of epoxy resin glue, 1 part of redispersible latex powder, 1 part of water reducing agent and 0.5 part of retarder.
5. The method for repairing concrete cracks according to claim 1, wherein in the step 2, the quartz sand is 200-mesh quartz sand, and the water reducing agent is a polycarboxy water reducing agent.
6. The method for repairing concrete cracks according to claim 1, wherein in step 3, the settlement of the filling slurry inside the cracks is concerned during the vibration process, and when the filling slurry does not settle any more, the vibration process is continued for 5 seconds.
7. The method for repairing concrete cracks according to claim 1, wherein in the step 3, the small-sized vibration device is a small-sized pneumatic knocking hammer, and when the device is operated, the device moves along the crack trend of the filling area.
8. The method for repairing concrete cracks according to claim 1, wherein in the step 3, when the air nozzle is used, the air nozzle needs to move along the crack of the filling area to blow three times, and when the filling slurry is settled, the area is blown and pressed intensively.
9. The method for repairing concrete cracks according to claim 1, wherein in step 4, glue is applied to the inner wall of the groove, and then the final pouring is performed.
10. The method for repairing concrete cracks as claimed in claim 1, wherein in step 4, after the completion of the pouring, the small vibration device is pressed to move along the poured cracks for vibration, and after the vibration is completed, the residual filling slurry is applied by using a tool to smooth the crack regions.
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| CN202110622125.8A CN113293797A (en) | 2021-06-04 | 2021-06-04 | Method for repairing concrete cracks |
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Application publication date: 20210824 |