CN115341777A - Carbon fiber reinforcing method for assembled multifunctional ward floor bearing plate - Google Patents
Carbon fiber reinforcing method for assembled multifunctional ward floor bearing plate Download PDFInfo
- Publication number
- CN115341777A CN115341777A CN202210948013.6A CN202210948013A CN115341777A CN 115341777 A CN115341777 A CN 115341777A CN 202210948013 A CN202210948013 A CN 202210948013A CN 115341777 A CN115341777 A CN 115341777A
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- China
- Prior art keywords
- carbon fiber
- fiber cloth
- concrete
- carbon
- layer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 52
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 52
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000003014 reinforcing effect Effects 0.000 title description 12
- 239000004744 fabric Substances 0.000 claims abstract description 34
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 239000000835 fiber Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000002787 reinforcement Effects 0.000 claims abstract description 9
- 238000004381 surface treatment Methods 0.000 claims abstract description 7
- 238000005452 bending Methods 0.000 claims abstract description 6
- 230000001680 brushing effect Effects 0.000 claims abstract description 4
- 239000004567 concrete Substances 0.000 claims description 24
- 239000010410 layer Substances 0.000 claims description 21
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- 239000000428 dust Substances 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011433 polymer cement mortar Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 abstract description 10
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
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
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0237—Increasing or restoring the load-bearing capacity of building construction elements of storey floors
Abstract
The invention relates to a carbon fiber reinforcement method of an assembled multifunctional ward floor bearing plate; the method comprises the following steps of 1, positioning the carbon fiber cloth: step 2, base layer surface treatment: step 3, leveling treatment: step 4, brushing resin on the bottom layer: step 5, pasting a sheet material: step 6, curing and maintaining: and 7, surface protection. The method adopts the matched adhesive to paste the carbon fiber composite material on the surface of the building structural member, the fiber direction of the composite material is consistent with the tension direction of the member, and the bending resistance and the shearing resistance of the structure are improved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a carbon fiber reinforcing method for an assembled multifunctional ward floor support plate.
Background
The natural environment of the building is changed frequently during the use process, so that the building is partially damaged or the building is subjected to wide-range adverse 'pathological changes'. The built house structure is often damaged, defected or hidden unsafe factors due to various reasons, and often cannot meet the requirements of structure safety, applicability and durability, and needs to be identified and reinforced.
There are many commonly used reinforcement methods, such as: the method comprises a section enlarging method, a steel wrapping reinforcing method, a steel sticking reinforcing method and the like. However, the current reinforcing method has the defects of complicated construction process, obviously changed appearance of a reinforced part, unobvious reinforcing effect and the like.
Disclosure of Invention
The invention aims to overcome the defects and provides a carbon fiber reinforcing method which can improve the bearing capacity or rigidity of a structure, change the stress state and limit the generation of cracks.
In order to achieve the above object, the present invention is realized by:
a carbon fiber reinforcing method for an assembled multifunctional ward floor bearing plate comprises the following steps
Step 1, positioning carbon fiber cloth:
paying off at the reinforced part, wherein the paying-off width is widened by 20mm at the periphery of the sticky carbon projection surface, so that when the concrete surface is wiped by acetone or alcohol, enough area is available to reduce the pollution to the sticky surface;
step 2, base layer surface treatment:
step 2.1, removing the decorative plastering layers on the original concrete surface layer and the beam slab surface by using an electric hammer to expose the original concrete base layer;
2.2, grinding the floating slurry layer on the surface of the concrete by using an angle grinder, wherein the grinding width is 1-2cm more than that of the sheet on each side, and removing the surface cement mortar until a concrete solid layer is exposed, wherein the larger the roughness is, the better the roughness is;
step 2.3, removing dust by using compressed air, and wiping the surface by using cotton fibers dipped with acetone or alcohol to remove floating dust and oil stains before pasting; because the existence of chemical substances such as a concrete release agent and the like can influence the cohesiveness of the primer, the base surface must be completely polished; if the surface is cleaned to meet the honeycomb pitted surface, the surface is repaired and leveled by using the repairing material; after the surface treatment is finished, completely blowing off the dust by using a compressed air machine;
step 3, leveling treatment:
if the surface of the concrete has local unevenness, poor adhesion of carbon fibers is often caused, and the surface is repaired to be smooth by using a repair material. When the surface of the material to be repaired is dry by touch, the next procedure construction is carried out;
step 4, brushing resin on the bottom layer:
uniformly coating the bottom resin on the surface of the concrete by using a roller brush, and performing the next procedure when the surface of the resin is dry by touch;
step 5, pasting a sheet material:
step 5.1, cutting the carbon fiber cloth along the direction of the fiber yarns, wherein the cutting is determined by the stress mode after the carbon fiber cloth is attached and laid;
step 5.2, the cut carbon cloth can not be folded to avoid damaging the fiber yarns and needs to be carefully rolled up;
step 5.3, all live loads on the plate are unloaded, impregnating resin is prepared, and the impregnating resin is uniformly coated on the pasting part;
step 5.4, adhering carbon fibers to a tension area of the plate member for bending reinforcement, wherein the fiber direction is consistent with the tension direction of the reinforced part; the lapping length of the carbon fiber cloth along the fiber stress direction is more than or equal to 150 mm, when a plurality of or multiple layers of carbon fiber cloth are adopted for reinforcement, the lapping positions of the carbon fiber cloth or each layer of carbon fiber cloth are staggered, and the staggered distance is 300 mm; the carbon fiber cloth is lightly pressed and attached to a position needing to be attached by hands, a special roller is adopted for rolling for multiple times along the fiber direction, air bubbles are squeezed out, impregnating resin fully permeates the carbon fiber cloth, and the carbon fiber cloth cannot be damaged during rolling;
step 6, curing and maintaining:
within 48 hours after the sheet is pasted, the sheet is not allowed to be hammered, moved or subjected to high-temperature treatment, and protective measures are taken for a finished product;
step 7, surface protection:
surface is additionally provided with 20 # Wire mesh and trowelled with 25mm thick polymer cement mortar.
The method adopts the matched adhesive to paste the carbon fiber composite material on the surface of the building structural member, the fiber direction of the composite material is consistent with the tension direction of the member, and the bending resistance and the shearing resistance of the structure are improved. The carbon fiber composite material has high mechanical property, the tensile strength of the carbon fiber composite material is generally ten times that of steel, the weight is light, the external dimension of the original structure is basically not changed after the reinforcing construction, and the self weight of the original structure is basically not increased.
Detailed Description
The invention is further illustrated by the following specific examples.
A carbon fiber reinforcing method for an assembled multifunctional ward floor bearing plate comprises the following steps
Step 1, positioning carbon fiber cloth:
paying off at the reinforced part, wherein the paying-off width is widened by 20mm at the periphery of the sticky carbon projection surface, so that when the concrete surface is wiped by acetone or alcohol, enough area is available to reduce the pollution to the sticky surface;
step 2, base layer surface treatment:
step 2.1, removing the decorative plastering layers on the original concrete surface layer and the beam slab surface by using an electric hammer to expose the original concrete base layer;
2.2, grinding the floating slurry layer on the surface of the concrete by using an angle grinder, wherein the grinding width is 1-2cm more than that of the sheet on each side, and removing the surface cement mortar until a concrete solid layer is exposed, wherein the larger the roughness is, the better the roughness is;
step 2.3, removing dust by using compressed air, and wiping the surface by using cotton fibers dipped with acetone or alcohol to remove floating dust and oil stains before pasting; because the existence of chemical substances such as a concrete release agent and the like can influence the caking property of the primer, the base surface must be completely polished; if the surface is cleaned to meet the honeycomb pitted surface, the surface is repaired and leveled by using the repairing material; after the surface treatment is finished, completely blowing off the dust by using a compressed air machine;
step 3, leveling treatment:
if the surface of the concrete has local unevenness, the carbon fiber is not bonded well and is repaired to be smooth by a repair material. Carrying out next procedure construction when the surface of the material to be repaired is dry by touch;
step 4, brushing resin on the bottom layer:
uniformly coating the bottom resin on the surface of the concrete by using a roller brush, and performing the next procedure construction when the surface of the resin is dry by touch;
step 5, pasting a sheet material:
step 5.1, cutting the carbon fiber cloth along the direction of the fiber yarns, wherein the cutting is determined by the stress mode after the carbon fiber cloth is pasted and laid;
step 5.2, the cut carbon cloth can not be folded to avoid damaging the fiber yarns and needs to be carefully rolled up;
step 5.3, all live loads on the plate are unloaded, impregnating resin is prepared, and the impregnating resin is uniformly coated on the pasting part;
step 5.4, adhering carbon fibers to a tension area of the plate member for bending reinforcement, wherein the fiber direction is consistent with the tension direction of the reinforced part; the lapping length of the carbon fiber cloth along the fiber stress direction is more than or equal to 150 mm, when a plurality of or multiple layers of carbon fiber cloth are adopted for reinforcement, the lapping positions of the carbon fiber cloth or each layer of carbon fiber cloth are mutually staggered, and the staggered distance is 300 mm; the carbon fiber cloth is lightly pressed and pasted at the position needing to be pasted by hands, a special roller is adopted for rolling for multiple times along the fiber direction, bubbles are squeezed out, the carbon fiber cloth is fully soaked by impregnating resin, and the carbon fiber cloth cannot be damaged during rolling;
step 6, curing and maintaining:
within 48 hours after the sheet is pasted, the sheet is not allowed to be hammered, moved or subjected to high-temperature treatment, and protective measures are taken for a finished product;
step 7, surface protection:
the surface is additionally provided with 20 # Wire mesh and 25mm thick polymer cement mortar was applied.
The method adopts the matched adhesive to paste the carbon fiber composite material on the surface of the building structural member, the fiber direction of the composite material is consistent with the tension direction of the member, and the bending resistance and the shearing resistance of the structure are improved. The carbon fiber composite material has high mechanical property, the tensile strength of the carbon fiber composite material is generally ten times that of steel, the weight is light, the external dimension of the original structure is basically not changed after the reinforcing construction, and the self weight of the original structure is basically not increased.
Claims (2)
1. A carbon fiber reinforcement method for an assembled multifunctional ward floor bearing plate is characterized by comprising the following steps: comprises that
Step 1, positioning carbon fiber cloth:
paying off at the reinforced part, wherein the paying-off width is widened by 20mm at the periphery of the sticky carbon projection surface, so that when the concrete surface is wiped by acetone or alcohol, enough area is available to reduce the pollution to the sticky surface;
step 2, base layer surface treatment:
step 2.1, removing the decorative plastering layers on the original concrete surface layer and the beam slab surface by using an electric hammer to expose the original concrete base layer;
2.2, grinding the floating slurry layer on the surface of the concrete by using an angle grinder, wherein the grinding width is 1-2cm more than that of the sheet on each side, and removing the surface cement mortar until a concrete solid layer is exposed, wherein the larger the roughness is, the better the roughness is;
step 2.3, removing dust by using compressed air, and wiping the surface by using cotton fibers dipped with acetone or alcohol to remove floating dust and oil stains before pasting; because the existence of chemical substances such as a concrete release agent and the like can influence the cohesiveness of the primer, the base surface must be completely polished; if the surface is cleaned to meet the honeycomb pitted surface, the surface is repaired and leveled by using the repairing material; after the surface treatment is finished, completely blowing off the dust by using a compressed air machine;
step 3, leveling treatment:
if the surface of the concrete has local unevenness, the carbon fiber is not bonded well and is repaired to be smooth by a repair material.
2. Carrying out next procedure construction when the surface of the material to be repaired is dry by touch;
step 4, brushing resin on the bottom layer:
uniformly coating the bottom resin on the surface of the concrete by using a roller brush, and performing the next procedure construction when the surface of the resin is dry by touch;
step 5, pasting a sheet material:
step 5.1, cutting the carbon fiber cloth along the direction of the fiber yarns, wherein the cutting is determined by the stress mode after the carbon fiber cloth is pasted and laid;
step 5.2, the cut carbon cloth can not be folded to avoid damaging the fiber yarns and needs to be carefully rolled up;
step 5.3, all live loads on the plate are unloaded, impregnating resin is prepared, and the impregnating resin is uniformly coated on the pasting part;
step 5.4, adhering carbon fibers to a tension area of the plate member for bending reinforcement, wherein the fiber direction is consistent with the tension direction of the reinforced part; the lapping length of the carbon fiber cloth along the fiber stress direction is more than or equal to 150 mm, when a plurality of or multiple layers of carbon fiber cloth are adopted for reinforcement, the lapping positions of the carbon fiber cloth or each layer of carbon fiber cloth are staggered, and the staggered distance is 300 mm; the carbon fiber cloth is lightly pressed and pasted at the position needing to be pasted by hands, a special roller is adopted for rolling for multiple times along the fiber direction, bubbles are squeezed out, the carbon fiber cloth is fully soaked by impregnating resin, and the carbon fiber cloth cannot be damaged during rolling;
step 6, curing and maintaining:
within 48 hours after the sheet is pasted, the sheet is not allowed to be hammered, moved or subjected to high-temperature treatment, and protective measures are taken for a finished product;
step 7, surface protection:
surface is additionally provided with 20 # Wire mesh and 25mm thick polymer cement mortar was applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210948013.6A CN115341777A (en) | 2022-08-09 | 2022-08-09 | Carbon fiber reinforcing method for assembled multifunctional ward floor bearing plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210948013.6A CN115341777A (en) | 2022-08-09 | 2022-08-09 | Carbon fiber reinforcing method for assembled multifunctional ward floor bearing plate |
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| Publication Number | Publication Date |
|---|---|
| CN115341777A true CN115341777A (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210948013.6A Pending CN115341777A (en) | 2022-08-09 | 2022-08-09 | Carbon fiber reinforcing method for assembled multifunctional ward floor bearing plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115341777A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115635706A (en) * | 2022-12-26 | 2023-01-24 | 天津爱思达新材料科技有限公司 | Processing method of carbon fiber composite material part |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115182615A (en) * | 2022-07-29 | 2022-10-14 | 上海宝冶集团有限公司 | Carbon fiber reinforcing method for assembled multifunctional ward floor bearing plate |
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- 2022-08-09 CN CN202210948013.6A patent/CN115341777A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115182615A (en) * | 2022-07-29 | 2022-10-14 | 上海宝冶集团有限公司 | Carbon fiber reinforcing method for assembled multifunctional ward floor bearing plate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115635706A (en) * | 2022-12-26 | 2023-01-24 | 天津爱思达新材料科技有限公司 | Processing method of carbon fiber composite material part |
| CN115635706B (en) * | 2022-12-26 | 2023-02-28 | 天津爱思达新材料科技有限公司 | Processing method of carbon fiber composite material part |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221115 |
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| RJ01 | Rejection of invention patent application after publication |