CN114809707A - Construction method for reinforcing concrete by adhering MMT modified epoxy resin to fiber cloth - Google Patents
Construction method for reinforcing concrete by adhering MMT modified epoxy resin to fiber cloth Download PDFInfo
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- CN114809707A CN114809707A CN202210619508.4A CN202210619508A CN114809707A CN 114809707 A CN114809707 A CN 114809707A CN 202210619508 A CN202210619508 A CN 202210619508A CN 114809707 A CN114809707 A CN 114809707A
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- Prior art keywords
- epoxy resin
- concrete
- modified epoxy
- montmorillonite
- fiber cloth
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- 239000003822 epoxy resin Substances 0.000 title claims abstract description 44
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 44
- 239000004567 concrete Substances 0.000 title claims abstract description 41
- 239000004744 fabric Substances 0.000 title claims abstract description 18
- 239000000835 fiber Substances 0.000 title claims abstract description 17
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 17
- 238000010276 construction Methods 0.000 title claims abstract description 13
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 35
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000003756 stirring Methods 0.000 claims abstract description 16
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000005498 polishing Methods 0.000 claims abstract description 4
- 238000005303 weighing Methods 0.000 claims abstract description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 10
- 239000011151 fibre-reinforced plastic Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 229910017059 organic montmorillonite Inorganic materials 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009730 filament winding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004575 stone Substances 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention discloses a construction method for reinforcing concrete by adhering MMT modified epoxy resin to fiber cloth, which is characterized by comprising the following steps of: polishing the surface of the concrete until the coarse aggregate is exposed, wiping the surface with ethanol, and then airing the surface at room temperature; weighing 100 parts of epoxy resin and 2 parts of montmorillonite (MMT) and placing at the temperature of 75-80 ℃ for 2 hours; mixing the two materials, and stirring for 10 min; placing the mixture in a high-speed stirrer, and fully stirring for 1-2 hours at the rotating speed of 2000-3000 r; adding 50 parts of curing agent, stirring for 0.5h, defoaming, and obtaining the montmorillonite modified epoxy resin composite material; the montmorillonite modified epoxy resin is uniformly coated on the surface of the concrete, and fiber cloth is attached to reinforce the concrete. The invention utilizes the nano-montmorillonite to modify the epoxy resin, can endow the epoxy resin with a plurality of excellent new performances, such as rigidity, hydrophobicity, thermal stability and the like, and further improves the service life of the FRP reinforced concrete in severe environment.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a construction method for reinforcing concrete by adhering MMT modified epoxy resin to fiber cloth.
Background
Concrete, referred to as "concrete (t you ng)": refers to the general name of engineering composite materials formed by cementing aggregate into a whole by cementing materials. The term concrete generally refers to cement as the cementing material and sand and stone as the aggregate; the cement concrete, also called as common concrete, is obtained by mixing with water (which may contain additives and admixtures) according to a certain proportion and stirring, and is widely applied to civil engineering. The concrete has the characteristics of rich raw materials, low price and simple production process, so that the consumption of the concrete is increased more and more. Meanwhile, the concrete also has the characteristics of high compressive strength, good durability, wide strength grade range and the like. These characteristics make it very widely used, not only in various civil engineering, but also in shipbuilding, machinery, ocean development, geothermal engineering, etc., and concrete is also an important material.
The concrete direct reinforcement method comprises the following steps: 1. enlarging the cross section and reinforcing; 2. replacement concrete reinforcement method; 3. a steel plate sticking and reinforcing method; 4. a bonding outer-wrapping steel reinforcing method is adopted; 5. sticking fiber reinforced plastic to reinforce; 6. a filament winding method; 7. anchor bolt anchoring method. The indirect reinforcing method comprises the following steps: 1. a prestress reinforcement method; 2. and adding a supporting and reinforcing method.
The Fiber Reinforced Plastic (FRP) reinforced concrete is a relatively new concrete reinforcing technology at present, and the reinforcing material mainly relates to epoxy resin and fiber cloth. However, the FRP reinforced concrete is often in a deteriorated environment, especially a water environment and a high temperature environment, so that the epoxy resin is hydrolyzed and degraded, and finally, the FRP reinforced concrete structure fails prematurely. The epoxy resin is modified by utilizing the nano montmorillonite (MMT), so that the epoxy resin has a plurality of excellent new performances (rigidity, hydrophobicity, thermal stability and the like), and the service life of the FRP reinforced concrete in severe environment is prolonged.
Therefore, the construction method for reinforcing the concrete by adhering the MMT modified epoxy resin to the fiber cloth is provided.
Disclosure of Invention
In order to solve the technical problems, the invention designs a construction method for reinforcing FRP modified epoxy resin bonded fiber cloth concrete, and the epoxy resin is modified by utilizing nano montmorillonite, so that the epoxy resin can be endowed with a plurality of excellent new performances, such as rigidity, hydrophobicity, thermal stability and the like, and the service life of the FRP reinforced concrete in severe environment is further prolonged.
In order to achieve the technical effects, the invention is realized by the following technical scheme: a construction method for reinforcing concrete by adhering MMT modified epoxy resin to fiber cloth is characterized by comprising the following steps:
(1) treating the concrete surface: polishing the surface of the concrete until the coarse aggregate is exposed out of the concrete, wiping off scattered ash on the surface by using ethanol, and airing at room temperature;
(2) preparing a nano montmorillonite epoxy resin composite material:
step 1: weighing 100 parts of epoxy resin and 2 parts of montmorillonite (MMT) and placing at the temperature of 75-80 ℃ for 2 hours;
step 2: mixing the two materials pretreated in Step1, and stirring for 10min by using a glass rod until the montmorillonite is primarily dispersed in the epoxy resin;
step 3: placing the mixture in Step2 in a high-speed stirrer, rotating at 2000-3000 r, and fully stirring for 1-2 h; and adding 50 parts of curing agent, stirring for 0.5h, uniformly stirring, and defoaming in a vacuum drying oven to obtain the nano montmorillonite modified epoxy resin composite material.
(3) And (3) uniformly coating the montmorillonite modified epoxy resin prepared in the step (2) on the surface of the concrete obtained in the step (1), and then pasting fiber cloth with corresponding size to reinforce the concrete.
The invention has the beneficial effects that:
the invention designs a construction method for reinforcing concrete by sticking MMT modified epoxy resin and fiber cloth, which utilizes nano montmorillonite to modify epoxy resin, can endow the epoxy resin with a plurality of excellent new performances such as rigidity, hydrophobicity, thermal stability and the like, and further improves the service life of FRP reinforced concrete in severe environment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a diagram of a finished product in example 1 of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
Example 1
Referring to fig. 1 to 2, a construction method for reinforcing concrete by adhering MMT modified epoxy resin to fiber cloth is characterized by comprising the following steps:
(1) treating the concrete surface: polishing the surface of a cylindrical concrete column with the strength of C40 and the size of 50mm (diameter) × 100mm (height) until coarse aggregate is exposed out of concrete, wiping off scattered ash on the surface by using ethanol, and airing at room temperature;
(2) preparing the MMT modified epoxy resin:
1) 100g of epoxy resin and 2g of organic montmorillonite (type: DK1N) was left at a temperature of 80 ℃ for 2h to increase the flowability of the epoxy resin and to remove any water that may be present in the montmorillonite;
2) mixing the two pretreated materials, and stirring for 10min by using a glass rod to primarily disperse the organic montmorillonite in the epoxy resin;
3) placing the mixture in a high-speed stirrer, controlling the rotating speed at 3000r, and fully stirring for 1-2 h; and adding 50g of curing agent, stirring for 0.5h, uniformly stirring, and defoaming in a vacuum drying oven to obtain the organic montmorillonite modified epoxy resin composite material.
(3) The prepared organic montmorillonite modified epoxy resin is uniformly coated on the surface of a concrete cylinder, and then carbon fiber Cloth (CFRP) with corresponding size is attached to reinforce the concrete.
(4) Curing at room temperature for one week, and applying the stress, as shown in figure 2.
Example 2
The invention designs a construction method for reinforcing concrete by adhering fiber cloth to MMT modified epoxy resin, which utilizes nano montmorillonite to modify epoxy resin, can endow the epoxy resin with a plurality of excellent new properties such as rigidity, hydrophobicity, thermal stability and the like, and further improves the service life of FRP reinforced concrete in severe environment.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (2)
1. A construction method for reinforcing concrete by MMT modified epoxy resin pasting fiber cloth is characterized by comprising the following steps:
(1) treating the concrete surface: polishing the surface of the concrete until the coarse aggregate is exposed out of the concrete, then wiping off the scattered ash on the surface by using ethanol, and airing at room temperature;
(2) preparing a nano montmorillonite epoxy resin composite material:
step 1: weighing 100 parts of epoxy resin and 2 parts of montmorillonite (MMT) and placing at the temperature of 75-80 ℃ for 2 hours;
step 2: mixing the two materials pretreated in Step1, and stirring for 10min by using a glass rod until the montmorillonite is primarily dispersed in the epoxy resin;
step 3: placing the mixture in Step2 in a high-speed stirrer, rotating at 2000-3000 r, and fully stirring for 1-2 h; and adding 50 parts of curing agent, stirring for 0.5h, uniformly stirring, and defoaming in a vacuum drying oven to obtain the nano montmorillonite modified epoxy resin composite material.
(3) And (3) uniformly coating the montmorillonite modified epoxy resin prepared in the step (2) on the surface of the concrete obtained in the step (1), and then pasting fiber cloth with corresponding size to reinforce the concrete.
2. The construction method of the MMT modified epoxy resin bonded fiber cloth reinforced concrete according to claim 1, which discloses an application of the construction method of the MMT modified epoxy resin bonded fiber cloth reinforced concrete in the technical field of civil engineering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210619508.4A CN114809707A (en) | 2022-06-02 | 2022-06-02 | Construction method for reinforcing concrete by adhering MMT modified epoxy resin to fiber cloth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210619508.4A CN114809707A (en) | 2022-06-02 | 2022-06-02 | Construction method for reinforcing concrete by adhering MMT modified epoxy resin to fiber cloth |
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| Publication Number | Publication Date |
|---|---|
| CN114809707A true CN114809707A (en) | 2022-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210619508.4A Pending CN114809707A (en) | 2022-06-02 | 2022-06-02 | Construction method for reinforcing concrete by adhering MMT modified epoxy resin to fiber cloth |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102532805A (en) * | 2010-12-20 | 2012-07-04 | 徐孝华 | Organic nano-montmorillonite modified epoxy resin |
| CN103669899A (en) * | 2013-11-27 | 2014-03-26 | 湖州盛基金属制品有限公司 | Method for constructing concrete reinforced by carbon fiber cloth |
| WO2015085807A1 (en) * | 2013-12-13 | 2015-06-18 | 深圳大学 | Method for reinforcing and protecting concrete using fiber composite material |
| 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 |
-
2022
- 2022-06-02 CN CN202210619508.4A patent/CN114809707A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102532805A (en) * | 2010-12-20 | 2012-07-04 | 徐孝华 | Organic nano-montmorillonite modified epoxy resin |
| CN103669899A (en) * | 2013-11-27 | 2014-03-26 | 湖州盛基金属制品有限公司 | Method for constructing concrete reinforced by carbon fiber cloth |
| WO2015085807A1 (en) * | 2013-12-13 | 2015-06-18 | 深圳大学 | Method for reinforcing and protecting concrete using fiber composite material |
| 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 |
Non-Patent Citations (3)
| Title |
|---|
| 彭勃;陈健聪;陈健明;: "纳米材料改性环氧树脂结构胶粘接强度的研究", 湖南大学学报(自然科学版), no. 08, 25 August 2007 (2007-08-25), pages 11 - 15 * |
| 罗绍仟;熊咏梅;: "浅析钢筋混凝土结构加固方法", 林业建设, no. 02, 15 April 2009 (2009-04-15), pages 23 - 26 * |
| 陈健聪;彭勃;: "有机蒙脱土改性环氧树脂结构胶粘剂的性能研究", 热固性树脂, no. 02, 30 March 2006 (2006-03-30), pages 25 - 29 * |
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