CN114837453A - Carbon fiber reinforcement method for concrete cracks - Google Patents
Carbon fiber reinforcement method for concrete cracks Download PDFInfo
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- CN114837453A CN114837453A CN202210617351.1A CN202210617351A CN114837453A CN 114837453 A CN114837453 A CN 114837453A CN 202210617351 A CN202210617351 A CN 202210617351A CN 114837453 A CN114837453 A CN 114837453A
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 166
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 166
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 161
- 238000000034 method Methods 0.000 title claims abstract description 57
- 230000002787 reinforcement Effects 0.000 title claims abstract description 36
- 239000004744 fabric Substances 0.000 claims abstract description 142
- 239000000853 adhesive Substances 0.000 claims abstract description 52
- 230000001070 adhesive effect Effects 0.000 claims abstract description 52
- 239000004576 sand Substances 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 112
- 239000002344 surface layer Substances 0.000 claims description 14
- 238000005498 polishing Methods 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 230000001680 brushing effect Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 28
- 238000005336 cracking Methods 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 18
- 229910052799 carbon Inorganic materials 0.000 description 18
- 239000012790 adhesive layer Substances 0.000 description 7
- 230000003014 reinforcing effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000001270 Allium sibiricum Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The application discloses a carbon fiber reinforcement method for concrete cracks, which comprises the steps of cleaning the concrete cracks with the crack width within a preset width; the edge of the first layer of carbon fiber cloth covering the concrete crack is adhered to the periphery of the concrete crack; and coating an adhesive on the outer side surface of the first layer of carbon fiber cloth and spraying medium sand. According to the carbon fiber reinforcement method for the concrete cracks, the carbon fiber cloth is adopted to repair and reinforce the concrete cracks of the concrete building, the carbon fiber cloth is high in strength, small in density, thin in thickness and good in adhesion performance with the building body, the continuous cracking of the area where the concrete cracks are located can be limited, the problem that the concrete cracks are continuously torn is solved, the construction can be simplified, and the concrete cracks can be easily connected with the follow-up construction process.
Description
Technical Field
The application relates to the field of building construction, in particular to a carbon fiber reinforcement method for a concrete crack.
Background
Structural cracks are easy to appear during the construction of the concrete building, and the structural cracks not only influence the subsequent construction, but also seriously influence the structural strength and the facility safety of the concrete building. Therefore, at present, glass fiber nets and steel wire nets are mostly adopted to repair the cracks.
However, in the concrete surface course construction process, when the glass fiber net or the steel wire net is adopted to repair the cracks of the concrete surface course, not only the existing structure of the concrete surface course needs to be cleaned in a large area, but also the glass fiber net or the steel wire net is difficult to effectively prevent the cracks from continuously cracking for a long time, so that the repair effect is effective, and the quality problem of the concrete building is easily caused.
Disclosure of Invention
The application aims to provide a carbon fiber reinforcement method for concrete cracks, which is simple and convenient to construct, strong in operability and capable of effectively solving the cracking problem of concrete buildings.
In order to achieve the above object, the present application provides a carbon fiber reinforcement method for a concrete crack, comprising:
s1: cleaning concrete cracks with the crack width within a preset width;
s2: the edge of the first layer of carbon fiber cloth covering the concrete crack is adhered to the periphery of the concrete crack;
s3: and coating an adhesive on the outer side surface of the first layer of carbon fiber cloth and spraying medium sand.
In some embodiments, S1 includes:
s11: polishing the surface of the concrete crack with the crack width within the preset width until the flatness error is less than 5 mm;
s12: and (3) polishing the internal and external corners of the concrete cracks into arc internal and external corners with the radius larger than 20 mm.
In some embodiments, S1 further includes, prior to S11:
s10: judging whether the concrete cracks with the crack width within the preset width have honeycomb pitted surfaces or not;
if yes, then enter
S100: picking and chiseling the honeycomb pitted surface until the reinforcing steel bars are exposed;
s101: repairing the chiseling part by adopting concrete;
if not, the process proceeds to S11.
In some embodiments, S2 includes:
s21: coating adhesives on the inner side surface and the peripheral side edge of the concrete crack;
s22: and covering and pressing the first layer of carbon fiber cloth on the concrete crack.
In some embodiments, S21 specifically includes:
s211: rolling and coating the adhesive within the range of 150mm outwards from the edge of the periphery of the concrete crack;
s212: and brushing an adhesive on the inner side surface of the concrete crack.
In some embodiments, between S22 and S3 further comprises:
s23: judging whether the first layer of carbon fiber cloth has hollowing or not;
if yes, judging whether the area of the empty drum is less than 10000mm 2 ，
If so, injecting the adhesive into the hollow drum by using a pinhole type glue injector;
if not, cutting off the empty drum and re-sticking the carbon fiber cloth;
if not, the process proceeds to S3.
In some embodiments, S3 is followed by:
s4: and fixing the decorative surface layer on the outer side of the first layer of carbon fiber cloth.
In some embodiments, between S3 and S4 further comprises:
s40: and curing the concrete cracks covered with the first layer of carbon fiber cloth.
In some embodiments, between S3 and S40 further comprises:
s30: covering and adhering the second layer of carbon fiber cloth to the first layer of carbon fiber cloth;
s300: and coating an adhesive on the outer side surface of the second layer of carbon fiber cloth and spraying medium sand.
In some embodiments, between S2 and S3 further comprises:
s20: fixedly clamping a first layer of carbon fiber cloth and a concrete member with a concrete crack by using a clamping device;
s200: and removing the fixture after the bonding part of the first layer of carbon fiber cloth and the concrete crack is primarily hardened.
Compared with the background art, the carbon fiber reinforcement method for the concrete cracks comprises the following steps:
s1: cleaning concrete cracks with crack width within a preset width;
s2: the edge of the first layer of carbon fiber cloth covering the concrete crack is adhered to the periphery of the concrete crack;
s3: and coating an adhesive on the outer side surface of the first layer of carbon fiber cloth and spraying medium sand.
The carbon fiber reinforcement method for the concrete cracks can be used for repairing the concrete cracks of a concrete building, for example, the carbon fiber reinforcement method is used for repairing cracks of a concrete surface layer, effectively prevents the cracks from continuously cracking, and provides structural guarantee for construction of a decorative surface layer.
When the carbon fiber reinforcement method for the concrete cracks is used for construction, the types of the concrete cracks in a concrete building need to be analyzed and judged, and whether the concrete cracks meet the construction requirements of the carbon fiber reinforcement method for the concrete cracks or not is confirmed. When the concrete crack meets the construction requirements, the steps of cleaning the concrete crack, adhering the first layer of carbon fiber cloth and adhering medium sand are sequentially executed, the first layer of carbon fiber cloth is made to cover and be adhered and fixed on the concrete crack, and meanwhile, the medium sand on the outer side surface of the first layer of carbon fiber cloth is used for preparing for subsequent construction.
According to the carbon fiber reinforcement method for the concrete cracks, the building body with the concrete cracks is reinforced by the carbon fiber cloth, and based on the material characteristics of high strength, small density, thin thickness and good adhesion with the building body of the carbon fiber cloth, the concrete cracks can be limited to be continuously cracked, the problem of continuous tearing of the concrete cracks is effectively solved, and the construction quality is guaranteed; the construction can be simplified, concrete cracks can be quickly and effectively repaired, the building body can be conveniently and easily unfolded in the subsequent construction process, labor, time and construction cost are greatly saved, and the construction efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic flow chart of a first method for reinforcing concrete cracks with carbon fibers according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart of a second method for reinforcing concrete cracks with carbon fibers according to an embodiment of the present disclosure;
fig. 3 is a concrete building repaired by the carbon fiber reinforcement method for concrete cracks provided by the embodiment of the application.
Wherein, the concrete comprises 1-concrete crack, 2-first layer of carbon fiber cloth, 3-decorative surface layer, 4-upper adhesive layer, 5-lower adhesive layer and 6-concrete surface layer.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to enable those skilled in the art to better understand the scheme of the present application, the present application will be described in further detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 3, fig. 1 is a schematic flow chart illustrating a first method for reinforcing carbon fibers in a concrete crack according to an embodiment of the present disclosure; FIG. 2 is a schematic flow chart of a second method for reinforcing concrete cracks with carbon fibers according to an embodiment of the present disclosure; fig. 3 is a concrete building repaired by the carbon fiber reinforcement method for concrete cracks provided by the embodiment of the application.
Referring to fig. 1 and 3, the present application provides a carbon fiber reinforcement method for a concrete crack, including:
s1: cleaning a concrete crack 1 with the crack width within a preset width;
s2: adhering the edge of the first layer of carbon fiber cloth 2 covering the concrete crack 1 to the peripheral side of the concrete crack 1;
s3: and coating an adhesive on the outer side surface of the first layer of carbon fiber cloth 2 and spraying medium sand.
The carbon fiber reinforcement method for the concrete cracks is used for repairing the concrete cracks 1 of the concrete surface layer 6 in the concrete building, reinforcing the concrete building, effectively preventing the concrete surface layer 6 of the concrete building from cracking continuously, and guaranteeing the facility safety of the concrete building.
When the carbon fiber reinforcement method for the concrete cracks is applied, firstly, the types of the concrete cracks 1 in a concrete building need to be analyzed and judged, the trend of the concrete cracks 1 is observed, and whether the concrete cracks 1 meet the construction requirements of the carbon fiber reinforcement method for the concrete cracks is confirmed. For example, if the concrete crack 1 is a through crack or the crack width exceeds the specification, the carbon fiber reinforcement method for the concrete crack cannot be applied to the concrete crack 1.
When the concrete crack 1 in the concrete building is a non-through crack and the crack width meets the specification requirement, the concrete crack 1 can be repaired and reinforced by adopting carbon fiber cloth according to the carbon fiber reinforcement method of the concrete crack, and the method mainly comprises two steps of adhering the carbon fiber cloth to the position of the concrete crack 1 and treating the adhered carbon fiber cloth.
Most concrete cracks 1 can be repaired by only one layer of carbon fiber cloth. Certainly, for a building body with a serious tearing degree of the concrete crack 1, more than two layers of carbon fiber cloth can be adopted to repair the concrete crack 1 at the same position.
In the following, the concrete crack 1 is repaired by using one layer of carbon fiber cloth as an example, and for convenience of distinction, the layer of carbon fiber cloth for repairing the concrete crack 1 is referred to as a first layer of carbon fiber cloth 2.
When the first layer of carbon fiber cloth 2 is adhered to the position of the concrete crack 1, a building where the concrete crack 1 is located and the first layer of carbon fiber cloth 2 need to be cleaned respectively, for example, aiming at the building where the concrete crack 1 is located, impurities at the position of the concrete crack 1 can be removed, and weak concrete and the like at the position of the concrete crack 1 can be removed and repaired; for the first layer of carbon fiber cloth 2, the shape can be cut and the dust on the surface can be removed. In order to realize that the first layer of carbon fiber cloth 2 is adhered to the building where the concrete crack 1 is located, at least one of the contact surfaces of the concrete crack 1 and the first layer of carbon fiber cloth 2 is coated with an adhesive, the adhesive can be usually coated on one side surface of the first layer of carbon fiber cloth 2, the thickness of the adhesive is not less than 2mm, the adhesive can be uniformly distributed on the surface of the first layer of carbon fiber cloth 2, and the distribution characteristics of the adhesive on the surface of the first layer of carbon fiber cloth 2 can also be adjusted by combining the adhering habit of the first layer of carbon fiber cloth 2, so that the thickness of the adhesive in the middle area of the first layer of carbon fiber cloth 2 is larger than that of the adhesive at the edge of the first layer of carbon fiber cloth 2, for example, the thickness of the adhesive in the middle area of the first layer of carbon fiber cloth 2 is larger than that of the adhesive at the edge of the first layer of carbon fiber cloth 2 by more than 2mm, at this time, the adhesive layer formed by the adhesive is formed into a convex shape having a thick middle and a thin edge. When the first layer of carbon fiber cloth 2 is adhered, the area of the concrete crack 1 is covered by the first layer of carbon fiber cloth 2, and the edge of the first layer of carbon fiber cloth 2 is adhered and fixed on the periphery of the concrete crack 1, in this state, the first layer of carbon fiber cloth 2 is usually tensioned and fixed on the area of the concrete crack 1. In addition, the deviation of the central line of the pasting position of the first layer of carbon fiber cloth 2 is not more than 10mm compared with the design requirement position.
When the first layer of carbon fiber cloth 2 which is well pasted is processed, a plurality of middlings are attached to the surface of the other side, away from the concrete crack 1, of the first layer of carbon fiber cloth 2 through the adhesive, the surface roughness of the first layer of carbon fiber cloth 2 is increased through the middlings, and therefore the bonding strength of the first layer of carbon fiber cloth 2 and a surface layer material of a building body is guaranteed in follow-up construction operation. The medium sand may be sprayed and adhered to the surface of the first layer of carbon fiber cloth 2, for example, an adhesive may be uniformly applied to the surface of the first layer of carbon fiber cloth 2, and then a plurality of medium sands may be sprayed to the surface of the first layer of carbon fiber cloth 2. The medium sand needs to be uniformly attached to the surface of the first layer of carbon fiber cloth 2, and no caking or accumulation phenomenon occurs, in other words, when the medium sand cakes or accumulates on the surface of the first layer of carbon fiber cloth 2, the surplus medium sand at the caking or accumulation position should be removed.
It can be seen that, for the first layer of carbon fiber cloth 2, the adhesive is provided on both the upper and lower sides, for this reason, the adhesive on the side of the first layer of carbon fiber cloth 2 close to the concrete crack 2 can be regarded as the lower adhesive layer 5, obviously, the lower adhesive layer 5 is used for adhering and fixing the first layer of carbon fiber cloth 2 and the concrete surface layer 6 with the concrete crack 1; meanwhile, the adhesive on the side of the second carbon fiber cloth 5 away from the concrete crack 2 can be regarded as the upper adhesive layer 4, and the upper adhesive layer 4 is used for adhering and fixing the first carbon fiber cloth 2 and the medium sand.
After the building body and the concrete crack 1 thereof are repaired and reinforced according to the carbon fiber reinforcement method of the concrete crack, constructors can continue to carry out subsequent construction on the building body, including but not limited to the surface mounting surface layer material of the building body.
To sum up, the concrete crack carbon fiber reinforcement method that this application provided adopts carbon cloth to consolidate the building body that has concrete crack 1, and carbon cloth intensity is high, density is little, thickness is thin, and is good with the adhesion properties of the building body, both can restrict the continuous fracture in concrete crack 1 place region, solves concrete crack 1 and lasts the torn problem, can simplify the construction again, effectively restores concrete crack 1 fast, easily links up follow-up construction technology conveniently.
The following provides a further description of the method for reinforcing concrete cracks with carbon fibers, with reference to the accompanying drawings and embodiments.
Referring to fig. 2 and 3, in some embodiments provided herein, S1 includes:
s11: polishing the surface of the concrete crack 1 with the crack width within the preset width until the flatness error is less than 5 mm;
s12: and (3) polishing the internal and external corners of the concrete crack 1 into arc internal and external corners with the radius larger than 20 mm.
It can be seen that when concrete crack 1 with crack width in the preset width is cleaned, different positions of concrete crack 1 need to be polished, including polishing the surface of the building where concrete crack 1 is located and polishing the internal and external corners of concrete crack 1.
When the surface of the building body where the concrete crack 1 is located is polished, a constructor can operate a polisher to grind the surface, so that the flatness error of the surface is smaller than 5mm, and the polishing range can be 200mm extending outwards from the edge of the concrete crack 1. When the first layer of carbon fiber cloth 2 needs to be adhered to the internal corner and the external corner of the position of the concrete crack 1, the constructor needs to polish the internal corner and the external corner of the position of the concrete crack 1 to form arc shapes, for example, the internal corner is polished to form an arc-shaped internal corner with the radius larger than 20mm, and the external corner is polished to form an arc-shaped external corner with the radius larger than 20 mm.
In addition, after polishing, floating dust at the corresponding position needs to be cleaned in time, and the surface of the building body at the position of the concrete crack 1 is kept dry and clean.
On the basis of the above embodiment, the carbon fiber reinforcement method for concrete cracks further includes, before S11:
s10: judging whether the concrete crack 1 with the crack width within the preset width has a honeycomb pitted surface or not;
if yes, then enter
S100: picking and chiseling the honeycomb pitted surface until the reinforcing steel bars are exposed;
s101: repairing the chiseling part by adopting concrete;
if not, the process proceeds to S11.
Therefore, when the building has the concrete quality defects of the honeycomb pitted surface, the honeycomb pitted surface needs to be repaired before the building with the concrete crack 1 is ground.
When the honeycomb rough surface is repaired, constructors can chive the honeycomb rough surface and remove the original weak concrete, so that the building body at the part of the honeycomb rough surface is exposed out of the reinforcing steel bars; and then filling the chiseling part with the prepared concrete, and filling the chiseling part to be flush with the part which is not chiseled.
In addition, when the building has the quality defect of the concrete with the cellular pitted surface, the cellular pitted surface is removed and the concrete is refilled, and the concrete at the filled part can be ground after the concrete is cured and molded.
In some embodiments provided herein, S2 may include
S21: coating adhesives on the inner side surface and the peripheral side edge of the concrete crack 1;
s22: and covering and pressing the first layer of carbon fiber cloth 2 on the concrete crack 1.
In this embodiment, the adhesive is applied to the surface of the building where the concrete crack 1 is located, the application range of the adhesive and the coverage range of the first layer of carbon fiber cloth 2 are adapted to each other, and in order to make the first layer of carbon fiber cloth 2 firmly attached to the surface of the building where the concrete crack 1 is located, the adhesive may be applied to both the inner side surface and the peripheral side edge of the concrete crack 1, for example, the foregoing S21 specifically includes:
s211: rolling and coating the adhesive in the range of 150mm outwards from the peripheral side edge of the concrete crack 1;
s212: and brushing an adhesive on the inner side surface of the concrete crack 1.
According to the above S211, the adhesive can be applied to the edge of the concrete crack 1, and during the operation, the constructor can roll-brush the prepared adhesive on the edge of the concrete crack 1 by using the roller brush, wherein the roll-brushing range is 150mm from the edge of the concrete crack 1 to the outside.
According to the above S212, the adhesive can be coated on the inner side surface of the concrete crack 1, and in the operation, the constructor can brush the prepared adhesive on the inner side surface of the concrete crack 1 by using a brush.
After the surface of the building body at the position of the concrete crack 1 is coated with the adhesive, the constructor covers and tightly presses and fixes the cut first layer of carbon fiber cloth 2 on the concrete crack 1. In the process, a constructor can roll the first layer of carbon fiber cloth 2 along the fiber direction of the first layer of carbon fiber cloth 2 by using a rubber roller, and steadily compact the adhesive between the concrete crack 1 and the first layer of carbon fiber cloth 2, so that the compactness and no cavity of the adhesive are ensured.
In order to ensure the bonding strength between the concrete crack 1 and the first layer of carbon fiber cloth 2, the method further comprises the following steps between S22 and S3:
s23: judging whether the first layer of carbon fiber cloth 2 has empty drum or not;
if yes, judging whether the area of the hollow drum is less than 10000mm 2 ，
If so, injecting the adhesive into the hollow drum by using a pinhole type glue injector;
if not, cutting off the empty drum and re-sticking the carbon fiber cloth;
if not, the process proceeds to S3.
Therefore, when the constructor judges that the first layer of carbon fiber cloth 2 has the hollow and empty drum phenomena according to the step S23, the constructor can take different operations according to the area of the empty drum.
When the area of the hollow drum is less than 10000mm 2 When in use, a small amount of adhesive can be injected into the hollow drum by a pinhole type glue injector, so that air in the hollow drum is squeezed out, and the hollow drum is filled with the adhesive.
When the area of the hollow drum is more than 10000mm 2 When in use, the constructor can cut off the empty drum and stick the carbon fiber cloth again; wherein, when cutting out the first layer carbon cloth 2 at the empty drum position, constructor can further distinguish the area of empty drum, if the area of empty drum is greater than 10000mm 2 However, when the whole first layer of carbon fiber cloth 2 is small, a constructor can only cut off part of the first layer of carbon fiber cloth 2, and accordingly, only the carbon fiber cloth needs to be pasted again at the cut-off part; if the area of the hollow drum is more than 10000mm 2 And when the proportion of the carbon fiber cloth 2 is larger than or equal to 5%, the constructor can cut off the whole first layer of carbon fiber cloth 2, and at the moment, the constructor equivalently removes all the first layer of carbon fiber cloth 2 and performs construction again.
When the concrete crack 1 can be repaired by using only one layer of carbon fiber cloth, after the construction work of the first layer of carbon fiber cloth 2 is completed according to the above-mentioned steps, the subsequent construction work can be performed according to S4 after S3,
s4: the decorative surface layer 3 is fixed on the outer side of the first layer of carbon fiber cloth 2.
As described above, the surface of the first carbon fiber cloth 2 on the side away from the concrete crack 1 is coated with the adhesive and sprayed with the medium sand, so that the decorative surface layer 3 can be firmly and reliably fixed to the surface of the first carbon fiber cloth 2.
Generally, between the above S3 and S4, there are further included:
s40: and curing the concrete cracks 1 covered with the first layer of carbon fiber cloth 2.
When the first layer of carbon fiber cloth 2 is maintained, the construction surface of the building where the concrete crack 1 is located is protected from disturbance. The curing time of the concrete cracks 1 covered with the first layer of carbon fiber cloth 2 is not less than 2h, and the concrete curing mode can refer to the conventional curing mode of the existing building construction.
When the concrete crack 1 needs to be repaired by more than two layers of carbon fiber cloth, the method also comprises the following steps between the S3 and the S40:
s30: covering and adhering the second layer of carbon fiber cloth to the first layer of carbon fiber cloth 2;
s300: and coating an adhesive on the outer side surface of the second layer of carbon fiber cloth and spraying medium sand.
In the above, by taking two layers of carbon fiber cloth as an example to repair the same concrete crack 1, it can be known that the two adjacent layers of carbon fiber cloth are bonded and fixed by using the adhesive and the medium sand.
When bonding first layer carbon cloth 2 and second floor carbon cloth, both can coat the adhesive in the outside surface of first layer carbon cloth 2, cover the second floor carbon cloth afterwards and compress tightly in first layer carbon cloth 2, also can coat the adhesive in the inboard surface of second floor carbon cloth, cover the second floor carbon cloth that will adhere to the adhesive afterwards and compress tightly in first layer carbon cloth 2. The inside and outside directions of the "inside surface" and the "outside surface" are the same as those of the building body having the concrete cracks 1.
The first carbon fiber cloth 2 and the second carbon fiber cloth are adhered, generally, continuous operation is required, that is, the second carbon fiber cloth is adhered to the first carbon fiber cloth 2 immediately after the adhering operation of the first carbon fiber cloth 2 is completed.
In addition, in some other embodiments provided herein, the method further includes, between S2 and S3:
s20: fixedly clamping a first layer of carbon fiber cloth 2 and a concrete member with a concrete crack 1 by using a clamping device;
s200: and (3) removing the fixture after the bonding part of the first layer of carbon fiber cloth 2 and the concrete crack 1 is primarily hardened.
The condition that the first layer of carbon fiber cloth 2 is temporarily fixed by adopting the clamp is mostly present under the working condition that a plurality of first layer of carbon fiber cloth 2 need to be pasted in parallel to the concrete crack 1. Because many first layer carbon cloth 2 need be pasted in parallel in concrete crack 1 department, and adjacent first layer carbon cloth 2 not only parallel distribution, still need satisfy specific interval, for example, the space of adjacent first layer carbon cloth 2 is not less than 5mm, for this reason, accessible fixture is fixed a position whole first layer carbon cloth 2, maintain the relative position relation of whole first layer carbon cloth 2 and arbitrary first layer carbon cloth 2 and concrete crack 1's the relation of pasting, in this process, must not disturb arbitrary first layer carbon cloth 2. After the bonding part of any one first layer of carbon fiber cloth 2 and the concrete crack 1 is primarily hardened, a constructor can remove the fixture and continue subsequent construction, for example, continue to paste a second layer of carbon fiber cloth on the outer side surface of the first layer of carbon fiber cloth 2, or fixedly mount the decorative surface layer 3 on the outer side surface of the first layer of carbon fiber cloth 2.
In conclusion, when the concrete crack 1 is repaired according to the carbon fiber reinforcement method for the concrete crack provided by the application, the construction is simple and convenient, a building body with the concrete crack 1 does not need to be cleaned in a large area and subjected to secondary construction, the labor, the time and the construction cost are greatly saved, and the working efficiency is improved; carbon fiber can enough firmly be attached to concrete and decorative cover 3, can utilize again that its structural strength is high, density is little and the thin these material characteristics of thickness effectively to restore concrete crack 1, avoids aforementioned concrete crack 1 department to last the fracture, ensures the structural safety of the building body that has aforementioned concrete crack 1.
The carbon fiber reinforcement method for the concrete cracks provided by the application is described in detail above. The principles and embodiments of the present application are described herein using specific examples, which are only used to help understand the method and its core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (10)
1. A carbon fiber reinforcement method for concrete cracks is characterized by comprising the following steps:
s1: cleaning a concrete crack (1) with the crack width within a preset width;
s2: adhering the edge of a first layer of carbon fiber cloth (2) covering the concrete crack (1) to the peripheral side of the concrete crack (1);
s3: and coating an adhesive on the outer side surface of the first layer of carbon fiber cloth (2) and spraying medium sand.
2. The carbon fiber reinforcement method for concrete cracks according to claim 1, wherein S1 includes:
s11: polishing the surface of the concrete crack (1) with the crack width within the preset width until the flatness error is less than 5 mm;
s12: and (3) polishing the internal and external corners of the concrete crack (1) into arc internal and external corners with the radius larger than 20 mm.
3. The carbon fiber reinforcement method for concrete cracks according to claim 2, wherein S1 further comprises, before S11:
s10: judging whether the concrete cracks (1) with the crack width within the preset width have honeycomb pitted surfaces or not;
if yes, then enter
S100: chiseling the honeycomb rough surface until the reinforcing steel bars are exposed;
s101: repairing the chiseling part by adopting concrete;
if not, the process proceeds to S11.
4. The carbon fiber reinforcement method for concrete cracks according to claim 1, wherein S2 includes:
s21: coating adhesives on the inner side surface and the peripheral side edge of the concrete crack (1);
s22: and covering and pressing a first layer of carbon fiber cloth (2) on the concrete crack (1).
5. The carbon fiber reinforcement method for concrete cracks according to claim 4, wherein S21 specifically comprises:
s211: rolling and coating an adhesive within the range of 150mm outwards from the peripheral side edge of the concrete crack (1);
s212: and brushing an adhesive on the inner side surface of the concrete crack (1).
6. The carbon fiber reinforcement method for concrete cracks according to claim 4, further comprising between S22 and S3:
s23: judging whether the first layer of carbon fiber cloth (2) has empty drum or not;
if yes, judging whether the area of the hollow drum is less than 10000mm 2 ，
If so, injecting the adhesive into the hollow drum by using a pinhole type glue injector;
if not, cutting off the empty drum and re-sticking the carbon fiber cloth;
if not, the process proceeds to S3.
7. The carbon fiber reinforcement method for concrete cracks according to claim 1, further comprising, after S3:
s4: and fixing the decorative surface layer (3) on the outer side of the first layer of carbon fiber cloth (2).
8. The carbon fiber reinforcement method for concrete cracks according to claim 7, further comprising between S3 and S4:
s40: and curing the concrete cracks (1) covered with the first layer of carbon fiber cloth (2).
9. The carbon fiber reinforcement method for concrete cracks according to any one of claims 1 to 8, further comprising between S3 and S40:
s30: covering and adhering a second layer of carbon fiber cloth to the first layer of carbon fiber cloth (2);
s300: and coating an adhesive on the outer side surface of the second layer of carbon fiber cloth and spraying medium sand.
10. The carbon fiber reinforcement method for concrete cracks according to any one of claims 1 to 8, further comprising between S2 and S3:
s20: fixing and clamping the first layer of carbon fiber cloth (2) and the concrete member with the concrete cracks (1) by adopting a clamping device;
s200: and removing the fixture after the bonding part of the first layer of carbon fiber cloth (2) and the concrete crack (1) is primarily hardened.
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| CN202210617351.1A CN114837453A (en) | 2022-06-01 | 2022-06-01 | Carbon fiber reinforcement method for concrete cracks |
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| CN107246158A (en) * | 2017-07-20 | 2017-10-13 | 浙江之江工程项目管理有限公司 | The construction technology of carbon fiber cloth strengthening technology |
| CN109423957A (en) * | 2017-09-05 | 2019-03-05 | 成都美吉房地产营销策划有限公司 | Construction technology when construction Bridge crack repairing |
| CN111827714A (en) * | 2020-08-19 | 2020-10-27 | 中国三冶集团有限公司 | Novel carbon fiber cloth reinforced concrete construction structure and construction method thereof |
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| CN107246158A (en) * | 2017-07-20 | 2017-10-13 | 浙江之江工程项目管理有限公司 | The construction technology of carbon fiber cloth strengthening technology |
| CN109423957A (en) * | 2017-09-05 | 2019-03-05 | 成都美吉房地产营销策划有限公司 | Construction technology when construction Bridge crack repairing |
| CN111827714A (en) * | 2020-08-19 | 2020-10-27 | 中国三冶集团有限公司 | Novel carbon fiber cloth reinforced concrete construction structure and construction method thereof |
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Application publication date: 20220802 |