CN111484279A - Mechanical embedding structure of carbon fiber grids and polymer mortar - Google Patents
Mechanical embedding structure of carbon fiber grids and polymer mortar Download PDFInfo
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- CN111484279A CN111484279A CN202010329330.0A CN202010329330A CN111484279A CN 111484279 A CN111484279 A CN 111484279A CN 202010329330 A CN202010329330 A CN 202010329330A CN 111484279 A CN111484279 A CN 111484279A
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- Prior art keywords
- polymer mortar
- carbon fiber
- layer
- mortar
- mechanical
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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
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
- C04B24/163—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
-
- 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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/0037—Materials containing oriented fillers or elements
- C04B2111/00379—Materials containing oriented fillers or elements the oriented elements being fibres
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a mechanical embedded structure of carbon fiber grids and polymer mortar, which comprises a first layer of polymer mortar; the surface of one side of the first layer of polymer mortar is paved with a roughened carbon fiber grid; a second layer of polymer mortar is paved on the surface of the roughened carbon fiber grid, which is far away from the first layer of polymer mortar; the first layer of polymer mortar and the second layer of polymer mortar are both prepared from carboxylic styrene-butadiene emulsion, cement and sand. The invention can improve the mechanical embedding effect between the carbon fiber grids and the mortar, thereby improving the reinforcing effect of the carbon fiber grid reinforcing system.
Description
Technical Field
The invention relates to the technical field of building reinforcement, in particular to a mechanical embedded structure of carbon fiber grids and polymer mortar.
Background
The carbon fiber grid reinforcing system comprises two parts, namely a bidirectional carbon fiber grid composite material and special mortar, and the carbon fiber grid is effectively anchored on the surface of a reinforced building through the mortar, so that the bearing capacity of the reinforced building can be improved, the extension of cracks is prevented, and the bending strength of the structure is improved. Compared with the traditional reinforcing method, the reinforcing system has the advantages of good peeling resistance, air permeability, corrosion resistance, fire resistance, shock resistance and durability, convenient construction, small occupied space, low construction cost, no need of basic treatment and extra fireproof treatment and the like. The anchoring efficiency of the core technology mortar of the carbon fiber grid reinforcing system to the carbon fiber grid, namely the interface bonding performance of the carbon fiber grid and the matched mortar, and the interface performance of the carbon fiber grid and the matched mortar mainly depends on two aspects: firstly, chemical bonding between carbon fiber surface groups and mortar groups; on the other hand, the mechanical embedding effect of the carbon fiber grids and the matched mortar. Therefore, the mechanical embedding mode between the carbon fiber grids and the polymer mortar is changed, the interface performance between the carbon fiber grids and the polymer mortar is improved, and the reinforcing effect of the whole reinforcing system is further improved.
The existing carbon fiber grid reinforcing system mainly adopts the mode that quartz sand or particles are bonded on the surface of a carbon fiber grid to increase the interface mechanical embedding effect between the carbon fiber grid and mortar so as to improve the interface shearing performance between the carbon fiber grid and the mortar, the problem that the reinforcing effect of the whole reinforcing system is poor due to the poor bonding performance of an organic resin coating on the surface of the carbon fiber grid and an inorganic quartz sand material exists in the mechanical embedding mode, and the interface between the carbon fiber grid and the quartz stone is prone to being stripped and invalid.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a mechanical fitting structure of carbon fiber mesh and polymer mortar, which can improve the mechanical fitting effect between the carbon fiber mesh and the mortar, thereby improving the reinforcing effect of the carbon fiber mesh reinforcing system.
The invention provides a mechanical embedded structure of carbon fiber grids and polymer mortar, which comprises a first layer of polymer mortar; the surface of one side of the first layer of polymer mortar is paved with a roughened carbon fiber grid; a second layer of polymer mortar is paved on the surface of the roughened carbon fiber grid, which is far away from the first layer of polymer mortar;
the first layer of polymer mortar and the second layer of polymer mortar are both prepared from carboxylic styrene-butadiene emulsion, cement and sand.
Preferably, the carboxylated styrene-butadiene emulsion is prepared from styrene, polybutadiene emulsion, 2-acrylamide-2-methylpropanesulfonic acid and methacrylic acid.
Preferably, the carboxylic styrene-butadiene emulsion comprises the following components in percentage by mass: polybutadiene emulsion: 2-acrylamido-2-methylpropanesulfonic acid: methacrylic acid 6:12:1: 1.
Preferably, the thickness of the first layer of polymer mortar is 4-6mm, preferably 5 mm.
Preferably, the thickness of the second layer of polymer mortar is between 9 and 11mm, preferably 10 mm.
Compared with the prior art, the invention has the beneficial effects that:
the polymer mortar used in the mechanical embedded structure of the carbon fiber grids and the polymer mortar greatly increases the chemical activity of the interface of the polymer mortar after the carboxyl butylbenzene emulsion is introduced, has excellent mechanical property and good durability, and forms chemical bonding effect with the organic epoxy coating on the surface of the carbon fiber grids by the organic components in the polymer mortar, so that the polymer mortar has higher interface property;
the surface of the carbon fiber grid used in the invention is subjected to special roughening treatment, and a regular uneven structure is formed on the surface of the carbon fiber grid, so that a gear-like meshing effect is formed between the grid and the mortar, the mechanical embedding effect between the carbon fiber grid and the polymer mortar can be increased, and the interface bonding strength is further improved;
in a word, the mechanical embedded structure between the carbon fiber grids and the polymer mortar provided by the invention can greatly improve the interface shear strength between the carbon fiber grids and the polymer mortar, improve the reinforcing effect of the carbon fiber grid reinforcing system on the building structure, and provide a safer guarantee for reinforcing the building structure.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic structural diagram of a mechanical embedding structure of a carbon fiber mesh and polymer mortar according to an embodiment of the present invention.
Reference numbers in the figures: 11. a first layer of polymer mortar; 12. roughening the carbon fiber mesh; 13. a second layer of polymer mortar.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, an embodiment of the present invention provides a mechanical embedding structure of carbon fiber mesh and polymer mortar, including a first layer 11 of polymer mortar with a thickness of 5 mm; the surface of one side of the first layer of polymer mortar 11 is paved with a roughened carbon fiber grid 12; a second layer of polymer mortar 13 with the thickness of 10mm is paved on the surface of the roughened carbon fiber grid 12, which is far away from the first layer of polymer mortar 11;
by optimizing the production process, the surface of the carbon fiber mesh composite material is roughened to form roughened carbon fiber meshes 12, and a regular uneven structure is formed on the surfaces of the meshes, so that the mechanical embedding effect between the carbon fiber meshes and the polymer mortar can be increased, and the interface performance is further improved. The roughened carbon fiber grids 12 replace a method of bonding quartz sand on the surface of carbon fibers to increase the mechanical embedding effect, so that the problem that the reinforcing effect of the whole reinforcing system is poor due to poor bonding performance of an organic resin material and an inorganic quartz sand material is solved.
The first layer of polymer mortar 11 and the second layer of polymer mortar 13 are both prepared from carboxylic styrene-butadiene emulsion, cement and sand. The carboxylic styrene-butadiene emulsion comprises the following components in percentage by mass: polybutadiene emulsion: 2-acrylamido-2-methylpropanesulfonic acid: methacrylic acid 6:12:1: 1.
The polymer mortar of the invention adopts quadripolymer carboxylic styrene-butadiene emulsion prepared from styrene, polybutadiene emulsion, 2-acrylamide-2-methylpropanesulfonic Acid (AMPS) and methacrylic acid (MAA) to replace water in the traditional mortar, has excellent mechanical property and good durability, and forms chemical bonding effect between organic components in the polymer mortar and an organic epoxy coating on the surface of a carbon fiber grid, thereby having higher interface performance.
The foregoing description is only exemplary of the preferred embodiments of the invention and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the invention. For example, the above features and (but not limited to) features having similar functions disclosed in the present invention are mutually replaced to form the technical solution.
Claims (5)
1. A mechanical embedded structure of carbon fiber grids and polymer mortar is characterized by comprising a first layer of polymer mortar; the surface of one side of the first layer of polymer mortar is paved with a roughened carbon fiber grid; a second layer of polymer mortar is paved on the surface of the roughened carbon fiber grid, which is far away from the first layer of polymer mortar;
the first layer of polymer mortar and the second layer of polymer mortar are both prepared from carboxylic styrene-butadiene emulsion, cement and sand.
2. The mechanical interlocking structure of carbon fiber mesh and polymer mortar of claim 1, wherein the carboxylic styrene-butadiene emulsion is prepared from styrene, polybutadiene emulsion, 2-acrylamide-2-methylpropanesulfonic acid and methacrylic acid.
3. The mechanical embedded structure of the carbon fiber grids and the polymer mortar of claim 2, wherein the component mass ratio of the carboxylic styrene-butadiene emulsion is styrene: polybutadiene emulsion: 2-acrylamido-2-methylpropanesulfonic acid: methacrylic acid 6:12:1: 1.
4. Mechanical interlocking of carbon fiber mesh and polymer mortar according to claim 3, characterized in that the thickness of the first layer of polymer mortar is 4-6mm, preferably 5 mm.
5. Mechanical interlocking of carbon fiber mesh and polymer mortar according to claim 4, characterized in that the thickness of the second layer of polymer mortar is 9-11mm, preferably 10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010329330.0A CN111484279A (en) | 2020-04-23 | 2020-04-23 | Mechanical embedding structure of carbon fiber grids and polymer mortar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010329330.0A CN111484279A (en) | 2020-04-23 | 2020-04-23 | Mechanical embedding structure of carbon fiber grids and polymer mortar |
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| Publication Number | Publication Date |
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| CN111484279A true CN111484279A (en) | 2020-08-04 |
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| CN202010329330.0A Withdrawn CN111484279A (en) | 2020-04-23 | 2020-04-23 | Mechanical embedding structure of carbon fiber grids and polymer mortar |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1245547A1 (en) * | 2001-03-29 | 2002-10-02 | Ruredil S.p.A. | Cement mortar, structure and method for reinforcing building components |
| CN107986709A (en) * | 2017-12-08 | 2018-05-04 | 卡本复合材料（天津）有限公司 | A kind of carbon fiber mesh reinforces dedicated mortar and preparation method |
| CN110144733A (en) * | 2019-01-23 | 2019-08-20 | 卡本科技股份有限公司 | Carbon fiber mesh and preparation method thereof, composite material and preparation method |
| CN110145071A (en) * | 2019-02-18 | 2019-08-20 | 卡本科技股份有限公司 | The Enhancement Method of carbon fiber mesh and mortar interface bond stress, composite material |
| CN110320078A (en) * | 2019-07-10 | 2019-10-11 | 卡本科技集团股份有限公司 | A kind of preparation method of carbon fiber mesh bond stress sample |
-
2020
- 2020-04-23 CN CN202010329330.0A patent/CN111484279A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1245547A1 (en) * | 2001-03-29 | 2002-10-02 | Ruredil S.p.A. | Cement mortar, structure and method for reinforcing building components |
| CN107986709A (en) * | 2017-12-08 | 2018-05-04 | 卡本复合材料（天津）有限公司 | A kind of carbon fiber mesh reinforces dedicated mortar and preparation method |
| CN110144733A (en) * | 2019-01-23 | 2019-08-20 | 卡本科技股份有限公司 | Carbon fiber mesh and preparation method thereof, composite material and preparation method |
| CN110145071A (en) * | 2019-02-18 | 2019-08-20 | 卡本科技股份有限公司 | The Enhancement Method of carbon fiber mesh and mortar interface bond stress, composite material |
| CN110320078A (en) * | 2019-07-10 | 2019-10-11 | 卡本科技集团股份有限公司 | A kind of preparation method of carbon fiber mesh bond stress sample |
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