CN112482817A - FRP (fiber reinforced plastic)/high-ductility high-permeability concrete bidirectional reinforced damaged reinforced concrete slab and preparation method thereof - Google Patents
FRP (fiber reinforced plastic)/high-ductility high-permeability concrete bidirectional reinforced damaged reinforced concrete slab and preparation method thereof Download PDFInfo
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- CN112482817A CN112482817A CN202011412782.1A CN202011412782A CN112482817A CN 112482817 A CN112482817 A CN 112482817A CN 202011412782 A CN202011412782 A CN 202011412782A CN 112482817 A CN112482817 A CN 112482817A
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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
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses an FRP (fiber reinforced plastic)/high-ductility high-permeability concrete bidirectional reinforced damaged reinforced concrete slab and a preparation method thereof. The method improves the transverse and longitudinal bonding strength of the interface by spraying high-ductility and high-permeability concrete. For the RC plate with serious cracks on the surface or large cracks caused by unloading, the crack part after FRP grid/ECC reinforcement has larger stripping stress along the normal direction of the interface. Once the peeling stress is greater than the bonding strength between the reinforcing layer and the RC plate, the reinforcing layer can peel off to cause reinforcing failure. When the bidirectional plate is reinforced, the FRP grids are stressed in both directions, so that the requirement on bonding strength is higher. The high-ductility and high-permeability concrete prepared by adding the concrete reinforcing agent into the ECC in a spraying mode can effectively permeate into cracks of the concrete, reacts with free calcium ions in old concrete to generate insoluble gel, and is nailed on a reinforced structure like an anchor bolt.
Description
Technical Field
The invention relates to the field of concrete structure reinforcement, in particular to an FRP (fiber reinforced plastic)/high-ductility high-permeability concrete bidirectional reinforced damaged reinforced concrete slab and a preparation method thereof.
Background
The reinforced concrete beam plate structure is one of the most common structural forms in civil engineering, but in the long-term use process, the reinforced concrete beam plate structure can be subjected to the natural disasters such as severe environment, earthquake, fire and the like, and the structure bearing load is continuously increased or the use function is changed. The large-amount reinforced concrete bidirectional plate structure has the problems of serious reinforcing steel bar corrosion, excessive cracks, overlarge fishing rate, insufficient bearing capacity and the like, and has durability, applicability and safety. From the development process of the European and American countries, the method adopting reinforcement and repair is occupying an increasingly large proportion. Therefore, the color fading of the 'great civil engineering' era in China can be expected, various effective reinforcing and reforming measures are researched, the bearing capacity of the damaged reinforced concrete beam plate structure is recovered and improved, the reinforced concrete beam plate structure is suitable for higher bearing requirements, and the requirement of new use functions is very important.
At present, commonly used reinforcing and modifying methods include a crack repairing method, a steel bonding reinforcing method, an external bonding FRP reinforcing method and the like. The externally bonded FRP reinforced concrete structure has the outstanding advantages of light weight, high strength, strong designability, light dead weight, convenient construction, small influence on the appearance of the structure, good corrosion resistance and the like. For the traditional external adhesion FRP reinforcement technology, the adhesion between the FRP sheet or plate and the reinforced structure concrete surface mainly depends on an adhesive, and the adhesive is a high molecular polymer made of epoxy resin as a matrix. The organic adhesive is very sensitive to damp-heat, dry-wet cycle, salt fog, high temperature and other environments. Because the concrete structure needing to be reinforced is in a severe environment, the bonding strength of the FRP reinforcing system is seriously degraded in a severe service environment. Once the FRP reinforcement system and the existing concrete are bonded to fail, the reinforcement effect is lost, and the existing structure is in a more dangerous state. Therefore, it is necessary to properly solve the problem of durability due to the deterioration of the adhesive at the interface between the FRP and the reinforced concrete.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an FRP/high-ductility high-permeability concrete bidirectional reinforced damaged reinforced concrete slab and a preparation method thereof.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
in a first aspect, the present invention provides a FRP/high-ductility high-permeability concrete bidirectional reinforced damaged reinforced concrete slab, characterized in that: the reinforced composite plate comprises a reinforced bidirectional plate, a composite material added with a concrete reinforcing agent and an FRP grid; the preparation method comprises the following steps:
the reinforced two-way slab has cracks at the slab bottom, before reinforcement, a layer of composite material added with concrete reinforcing agent is sprayed on the slab bottom of the reinforced two-way slab, then the FRP grid is fixed on the slab bottom, and finally the composite material added with the concrete reinforcing agent is sprayed on the other side of the FRP grid to form a reinforced whole, so that the FRP/high-ductility high-permeability concrete two-way reinforced damaged reinforced concrete slab is obtained;
the FRP grids are wrapped and restrained by the composite material; the high-ductility and high-permeability concrete is sprayed to improve the transverse and longitudinal bonding strength at the interface, and prevent the reinforcing failure caused by peeling and falling phenomena of the reinforcing layer due to overlarge peeling stress; the concrete reinforcing agent penetrates into cracks to generate insoluble gel, and plays the same role as an anchor bolt to pin the reinforcing layer on the reinforced bidirectional plate.
In a second aspect, the invention provides a method for preparing the FRP/high-ductility high-permeability concrete bidirectional reinforced damaged reinforced concrete slab, which is characterized in that: the method improves the bonding strength between the FRP grids and the reinforced bidirectional plate by spraying high-ductility and high-permeability concrete between the FRP grids and the reinforced bidirectional plate; the concrete reinforcing agent permeates into cracks to generate insoluble gel, and plays the same role as an anchor bolt to pin the reinforcing layer on the reinforced bidirectional plate; the method comprises the following steps:
1) before reinforcement, spraying a layer of composite material added with a concrete reinforcing agent on the bottom of the reinforced bidirectional plate;
2) fixing the FRP grids to the bottom of the plate;
3) and finally, spraying a composite material added with a concrete reinforcing agent on the other side of the FRP grid to form a reinforced whole.
Preferably, the composite material is high-ductility high-permeability concrete, and the weight ratio of each component to cement is 1.4-2.0 of fly ash; 1.0-1.1 parts of 80-120-mesh quartz sand; 0.5-1 part of water; water reducing agent: 0.01-0.015; PVA: 0.05-0.06; concrete reinforcing agent: 0.02-0.05.
Further, it is characterized in that: the FRP grids are CFRP grids.
Furthermore, the concrete reinforcing agent is any one of a concrete reinforcing agent containing a high-activity fluorine titanium substance, a concrete reinforcing agent containing magnesium fluosilicate and a concrete reinforcing agent obtained by diluting ethyl silicate and ethanol according to the volume ratio of 1: 1.
When the bidirectional plate is reinforced, the FRP grids are stressed bidirectionally. To ensure that the FRP provides effective bi-directional restraint, the bond strength at the interface in both the transverse and longitudinal directions needs to be increased. And the high-ductility and high-permeability concrete can penetrate into cracks to generate insoluble gel, and the reinforcing layer is nailed on the reinforced plate like an anchor bolt. The method thus improves both the transverse and longitudinal bond strength at the interface by spraying high ductility, high permeability concrete. The reinforcing failure caused by peeling and falling off phenomena of the reinforcing layer due to overlarge peeling stress is prevented.
The working principle of the invention is as follows:
ca (OH) in fully hydrated set cement2About 20%, taking into account the use of Ca (OH)2React with the inclusions to form an insoluble gel and thereby increase the bond strength at the interface of the FRP grid/ECC with the existing concrete slab. The concrete reinforcing agent has certain permeability, the effective permeability can reach 3-8mm, and the concrete reinforcing agent can be mixed with Ca (OH)2The reaction produces an insoluble gel that pins the reinforcing layer to the structure to be reinforced like an anchor bolt. Therefore, the high-ductility and high-permeability concrete prepared by adding the concrete reinforcing agent into the ECC through spraying can improve the transverse and longitudinal bonding strength at the interface. The ultimate tensile strain of the ultra-high toughness cement-based composite material can exceed 3 percent, and the ultra-high toughness cement-based composite material is used as an interface binder and a reinforcing material to wrap and constrain FRP gridsThe problem that FRP is easy to peel off due to aging of the adhesive on the interface of the externally-adhered FRP sheet is solved. Meanwhile, the ECC material has the characteristics of high temperature resistance and small cracks, the fire resistance of the structure and the erosion resistance of harmful ions such as chloride ions can be improved, the excellent tensile property can ensure the cooperative work with the FRP material, the mechanical properties of the two materials are fully exerted, and multiple effects of improving the stress performance, the durability and the fire resistance are realized.
The invention has the advantages and beneficial effects that:
the FRP grid/ECC reinforcing damaged reinforced concrete slab is characterized in that FRP sheet materials in the traditional externally-attached FRP reinforced concrete structure technology are replaced with the FRP grid; the method for wrapping and restraining the FRP by using the ultra-high-toughness cement-based composite material (ECC) without using an organic adhesive. But the surface is seriously damaged and cracks exist, and when the surface cannot be unloaded, the surface is also severely damaged and cracks exist, and the bonding strength at the interface is seriously influenced. In addition, when the bidirectional plate is reinforced, the FRP grid is stressed in both directions, so that the requirement on bonding strength is higher. The invention improves the transverse and longitudinal bonding strength between the FRP grid/ECC and the existing concrete slab by spraying high-ductility and high-permeability concrete prepared by adding a concrete reinforcing agent into the ECC. The high-ductility and high-permeability concrete can permeate into cracks to react with calcium ions in old concrete to generate insoluble gel, and the reinforcing layer is nailed on the reinforced plate like an anchor bolt, so that the interface bonding strength is increased, and the reinforcing method can still be used under the condition of large damage and large cracks.
Drawings
FIG. 1 is a schematic view of FRP/high-ductility high-permeability concrete bi-directionally reinforcing a damaged reinforced concrete slab;
FIG. 2 is a schematic view of a bi-directional plate bottom crack;
FIG. 3 is a schematic cross-sectional view of a FRP/high-ductility high-permeability concrete bi-directional reinforcement of a damaged reinforced concrete slab;
FIG. 4 is a schematic diagram of the mechanism of action of high-ductility and high-permeability concrete at the interface.
In the figure: 1. reinforced plate, 2, high-ductility high-permeability concrete, 3, CFRP grid, 4, crack, 5 and insoluble glue generated by reaction.
Detailed Description
The invention is explained in further detail below with reference to the figures and the specific embodiments.
As shown in figure 1, the invention relates to a method for reinforcing a reinforced concrete bidirectional plate by FRP/high-ductility high-permeability concrete bidirectionally. The concrete used for casting the slab is C20 concrete with the size of 1800mm multiplied by 1500mm multiplied by 70mm and four simple sides. Firstly, spraying a layer of composite material 2 added with concrete reinforcing agent on the bottom of the plate, then fixing the FRP grid 3 on the side, and then spraying the composite material 2 added with concrete reinforcing agent on the other side of the FRP grid 3.
The composite material 2 is high-ductility high-permeability concrete; the FRP grid 3 is a CFRP grid; the concrete reinforcing agent is an existing concrete reinforcing agent.
The composite material 2 is high-ductility high-permeability concrete, and the weight ratio of each component to cement is that fly ash: 1.4-2.0; 80-120 mesh quartz sand: 1.0-1.1; water: 0.5 to 1; water reducing agent: 0.01-0.015; PVA: 0.05-0.06; concrete reinforcing agent: 0.02-0.05; the existing concrete reinforcing agent is a concrete reinforcing agent containing high-activity fluorine titanium, a concrete reinforcing agent containing magnesium fluosilicate and a concrete reinforcing agent obtained by diluting ethyl silicate and ethanol according to the volume ratio of 1: 1.
Panel 1(B1) is an unreinforced panel and panel 2(B2) is a reinforced panel.
| Board | Yield lotus cultivation KN | Ultimate load KN |
| |
20 | 44 |
| |
25 | 55 |
The FRP grid/ECC is adopted to reinforce the bidirectional plate, and the bearing capacity is improved by 10-15%. The method for reinforcing the reinforced concrete bidirectional plate by FRP/high-ductility high-permeability concrete in a bidirectional way can improve the bearing capacity by 20-30%.
During the construction process, the control of the key links is required, and the control is divided into two aspects of materials and construction. Firstly, in terms of materials, the thickness of the FRP grid and the size of the grid are required according to actual needs; the preparation of the ultra-high toughness cement-based composite material is carried out according to the proportion and the feeding sequence strictly, so that the ultra-high toughness cement-based composite material is ensured to be reliably bonded with concrete and can be coordinated with the original concrete bidirectional plate for deformation. Secondly, in the construction link, the use of the anchor bolts and the lap joint of the mesh materials need to be paid attention to in the installation process of the FRP mesh. The grid material is fixed on the concrete surface by the anchor bolts, so that gaps are avoided, and the rubber pad is adopted to protect the fiber grid from being damaged when the anchor bolts are screwed down; the required overlapping length is required to be met during overlapping, both ends of the overlapping section are fixed firmly by using an anchor, and the overlapping part is prevented from becoming a weak part. In the case of the injection work, voids are generated in some crossing portions where the crossing portions are difficult to be filled, and voids in the mesh portions are filled and compacted with trowels.
Claims (6)
1. The utility model provides a two-way impaired reinforced concrete slab of reinforcing of FRP high ductility high permeability concrete which characterized in that: comprises a reinforced bidirectional plate (1), a composite material (2) added with a concrete reinforcing agent and an FRP grid (3); the preparation method comprises the following steps:
the reinforced concrete slab is characterized in that a crack (4) exists at the slab bottom of the reinforced bidirectional slab (1), before reinforcement, a layer of composite material (2) added with a concrete reinforcing agent is sprayed on the slab bottom of the reinforced bidirectional slab (1), then the FRP grid (3) is fixed to the slab bottom, and finally the composite material (2) added with the concrete reinforcing agent is sprayed on the other side of the FRP grid (3) to form a reinforced whole, so that the FRP/high-ductility high-permeability concrete reinforced damaged reinforced concrete slab is obtained;
the FRP grids (3) are wrapped and restrained by the composite material (2); the high-ductility and high-permeability concrete is sprayed to improve the transverse and longitudinal bonding strength at the interface, and prevent the reinforcing failure caused by peeling and falling phenomena of the reinforcing layer due to overlarge peeling stress; the concrete reinforcing agent penetrates into the cracks (4) to generate insoluble gel, and the insoluble gel plays the same role as an anchor bolt to pin the reinforcing layer on the reinforced bidirectional plate (1).
2. A method for preparing the FRP/high-ductility high-permeability concrete bidirectional reinforced damaged reinforced concrete slab as claimed in claim 1, wherein: the method improves the bonding strength between the FRP grids and the reinforced bidirectional plate by spraying high-ductility and high-permeability concrete between the FRP grids and the reinforced bidirectional plate; the concrete reinforcing agent permeates into cracks to generate insoluble gel, and plays the same role as an anchor bolt to pin the reinforcing layer on the reinforced bidirectional plate; the method comprises the following steps:
1) before reinforcement, spraying a layer of composite material (2) added with a concrete reinforcing agent on the bottom of the reinforced bidirectional plate (1);
2) then fixing the FRP grid (3) to the bottom of the plate;
3) and finally, spraying the composite material (2) added with the concrete reinforcing agent on the other side of the FRP grid (3) to form a reinforced whole.
3. The method for preparing FRP/high-ductility high-permeability concrete bidirectional reinforced damaged reinforced concrete slabs according to claim 2, wherein the method comprises the following steps: the composite material (2) is high-ductility high-permeability concrete, and the weight ratio of each component to cement is 1.4-2.0 of fly ash; 1.0-1.1 parts of 80-120-mesh quartz sand; 0.5-1 part of water; water reducing agent: 0.01-0.015; PVA: 0.05-0.06; concrete reinforcing agent: 0.02-0.05.
4. The method for preparing FRP/high-ductility high-permeability concrete bi-directionally reinforced damaged reinforced concrete slabs according to claim 2 or 3, wherein the method comprises the following steps: the FRP grid (3) is a CFRP grid.
5. The method for preparing FRP/high-ductility high-permeability concrete bi-directionally reinforced damaged reinforced concrete slabs according to claim 2 or 3, wherein the method comprises the following steps: the concrete reinforcing agent is any one of a concrete reinforcing agent containing high-activity fluorine titanium, a concrete reinforcing agent containing magnesium fluosilicate and a concrete reinforcing agent obtained by diluting ethyl silicate and ethanol according to the volume ratio of 1: 1.
6. The method for preparing FRP/high-ductility high-permeability concrete bi-directionally reinforced damaged reinforced concrete slabs according to claim 4, wherein the method comprises the following steps: the concrete reinforcing agent is one of a concrete reinforcing agent containing high-activity fluorine titanium, a concrete reinforcing agent containing magnesium fluosilicate and a concrete reinforcing agent obtained by diluting ethyl silicate and ethanol according to the volume ratio of 1: 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011412782.1A CN112482817A (en) | 2020-12-03 | 2020-12-03 | FRP (fiber reinforced plastic)/high-ductility high-permeability concrete bidirectional reinforced damaged reinforced concrete slab and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011412782.1A CN112482817A (en) | 2020-12-03 | 2020-12-03 | FRP (fiber reinforced plastic)/high-ductility high-permeability concrete bidirectional reinforced damaged reinforced concrete slab and preparation method thereof |
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| CN112482817A true CN112482817A (en) | 2021-03-12 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618956A (en) * | 2009-08-03 | 2010-01-06 | 同济大学 | Bi-component aqueous ground hardening agent and preparation method thereof |
| CN102557727A (en) * | 2011-12-30 | 2012-07-11 | 颜正荣 | Building cement-based penetration hardening material and preparation method thereof |
| CN103496865A (en) * | 2013-09-16 | 2014-01-08 | 北京工业大学 | Hybrid FRP (Fiber Reinforced Plastic) grid enhancedreinforced ECC (Engineered Cementitious Composite) and application thereof tostructure for reinforcing concrete structure |
| KR20160120114A (en) * | 2015-04-07 | 2016-10-17 | 한국기술교육대학교 산학협력단 | Fiber Reinforced Concrete Structure With End Slip Prevention |
| CN108298904A (en) * | 2018-02-08 | 2018-07-20 | 中国矿业大学 | A kind of reinforcement means for the ECC composite fibre mesh grids improving masonry wall anti-seismic performance |
| CN108532981A (en) * | 2018-05-07 | 2018-09-14 | 中国矿业大学 | A kind of reinforcement means for the TRC improving leafy brick masonry wall anti-seismic performance |
| CN110256014A (en) * | 2019-06-27 | 2019-09-20 | 中国矿业大学 | A kind of FRP grid reinforcing complex cement base binding material and preparation method thereof |
-
2020
- 2020-12-03 CN CN202011412782.1A patent/CN112482817A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618956A (en) * | 2009-08-03 | 2010-01-06 | 同济大学 | Bi-component aqueous ground hardening agent and preparation method thereof |
| CN102557727A (en) * | 2011-12-30 | 2012-07-11 | 颜正荣 | Building cement-based penetration hardening material and preparation method thereof |
| CN103496865A (en) * | 2013-09-16 | 2014-01-08 | 北京工业大学 | Hybrid FRP (Fiber Reinforced Plastic) grid enhancedreinforced ECC (Engineered Cementitious Composite) and application thereof tostructure for reinforcing concrete structure |
| KR20160120114A (en) * | 2015-04-07 | 2016-10-17 | 한국기술교육대학교 산학협력단 | Fiber Reinforced Concrete Structure With End Slip Prevention |
| CN108298904A (en) * | 2018-02-08 | 2018-07-20 | 中国矿业大学 | A kind of reinforcement means for the ECC composite fibre mesh grids improving masonry wall anti-seismic performance |
| CN108532981A (en) * | 2018-05-07 | 2018-09-14 | 中国矿业大学 | A kind of reinforcement means for the TRC improving leafy brick masonry wall anti-seismic performance |
| CN110256014A (en) * | 2019-06-27 | 2019-09-20 | 中国矿业大学 | A kind of FRP grid reinforcing complex cement base binding material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 方小牛等: "《生土类建筑保护技术与策略》", 31 January 2018, 同济大学出版社 * |
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