CN104085117A - Preparation method of steel fiber composite bar - Google Patents
Preparation method of steel fiber composite bar Download PDFInfo
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- CN104085117A CN104085117A CN201410269466.1A CN201410269466A CN104085117A CN 104085117 A CN104085117 A CN 104085117A CN 201410269466 A CN201410269466 A CN 201410269466A CN 104085117 A CN104085117 A CN 104085117A
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- resin
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- fiber cloth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/32—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core on a rotating mould, former or core
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Reinforced Plastic Materials (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a preparation method of a steel fiber composite bar. The steel fiber composite bar is obtained by compounding a thread steel bar inner core, a fiber cloth and a basalt fiber bundle and has a reasonable construction structure; the fiber cloth and the basalt fiber bundle used as reinforcing materials are fully dipped in resin, so the design strength of the reinforced concrete structure can be effectively met; and the method overcomes the defects of strong brittleness, high price and the like of present fiber reinforced composite materials (FRP), and is suitable for wide popularization use. The preparation method is simple, the circumferential winding of the basalt fiber bundle can effectively fills a gap between the projection rib of the thread steel bar inner core and the fiber cloth, and substantially reduces the strength and rigidity weakening due to the local bending of the fiber cloth during the compounding of the vertical fiber (fiber cloth) with the thread steel bar.
Description
Technical field
The present invention is a kind of preparation method who is applicable to steel-continuous-fiber composite-rib, and the preparation technology of the composite reinforcing reinforcing material that is specifically related to use in reinforced concrete structure, belongs to field of compound material.
Background technology
Reinforced concrete structure (reinforced concrete structure) is a kind of structure by reinforcing bar and concrete constructions, reinforcing bar bearing tension, concrete bears pressure, have firm, durable, fire protecting performance is good, than steel construction, save steel and low cost and other advantages, also be a kind of construction more common in current architectural engineering, be used for various super-high buildings, longspan structure, as load structures such as bridge, tunnels.In its structure, reinforcing bar is as basic reinforcing material, its combination property is stronger, but there is the shortcomings such as easily corrosion, based on this situation, in recent years, fibre reinforced composites (FRP) are because the characteristic of its high-strength light is used widely gradually, for example, patent documentation CN1936206A(steel-continuous-fiber composite-rib reinforced concrete earthquake-resisting structure) a kind of anti-seismic structure of using these fibre reinforced composites (FRP) and concrete binding to form is disclosed, but when reality is used, these fibre reinforced composites (FRP) but also exist material fragility strong, the defects such as price height, for this reason, Chinese scholars propose with different fibers mix or fibers encapsulation reinforcing bar to obtain combination property excellent, the advanced composite material (ACM) reinforcement that price is low, but at present, research to steel-continuous fiber composite reinforcing (SFCB) is at home and abroad scarcely out of swaddling-clothes, there is no ripe product, certainly, its production technology does not have regularization yet.
Summary of the invention
The object of the present invention is to provide a kind of preparation method who is applicable to steel-continuous-fiber composite-rib, adopt spiral inner core, fiber cloth and basalt fibre bundle are composited, there is rational structural texture, and the fiber cloth and the basalt fibre bundle that as reinforcing material, use all adopt resin fully to flood, in it, outer boundary all has good adhesive property, can effectively be satisfied with the design strength of reinforced concrete structure, simultaneously, can also overcome existing fibre reinforced composites (FRP) exists material fragility strong, the defects such as price height, practical effect is good.
The present invention is achieved through the following technical solutions: a kind of preparation method who is applicable to steel-continuous-fiber composite-rib, this fibre composite reinforcement has overcome existing fibre reinforced composites (FRP) and has had the defects such as material fragility is strong, price is high, there is stronger combination property, and cheap, in the present invention, this fibre composite reinforcement is mainly composited by spiral inner core, fiber cloth and basalt fibre bundle, and its composite steps comprises:
A: scrubbing: the embroidery of removing core outer surface in spiral with sand paper is dirty, then uses acetone that spiral inner core is cleaned up;
B: parcel fiber cloth: brushing resin in fiber cloth, until epoxy resin impregnated full after, fiber cloth is wrapped in to the outer surface of spiral inner core and forms with it twisted steel;
B: be wound around basalt fibre bundle: by being impregnated with the rib tooth hoop winding of the basalt fibre bundle of resin along twisted steel, form fibre composite reinforcement;
D: curing molding.
Because the existing spiral both sides of buying are on the market all with longitudinal michinaga rib of symmetry, and cause the fibre composite reinforcement cross section ovalize structure being composited, for this reason, preparation method of the present invention also comprises the procedure of processing of double thread reinforcing bar inner core: first, use sander to remove the monosymmetric longitudinal michinaga rib of spiral, then, use after wipes of alcohol wash clean, then carry out described A step.
Curing molding is an important process process in preparation process of the present invention, and in described D step, curing molding comprises:
A: the fibre composite reinforcement that step C is made is sent into resin impregnation device, completes the dipping of resin to fibre composite reinforcement;
B: the fibre composite reinforcement that is impregnated with resin is sent into preforming tool and complete the crowded of unnecessary resin and remove;
C: use plastic band, to carrying out hoop winding from preforming tool fibre composite reinforcement out;
D: the fibre composite reinforcement that above-mentioned steps c is made is sent into curing mold, completes the curing molding of fibre composite reinforcement;
E: remove plastic band after resin solidification, make surface with the fibre composite reinforcement of rib line.
In the present invention, described fiber cloth is carbon cloth or basalt fiber cloth, and both differ from one another, wherein, carbon cloth stable performance, elastic modelling quantity is higher, and combination property is also very superior; Basalt fiber cloth is a kind of inorganic material, and ductility is better, and cost performance is higher.
In the present invention, described resin is epoxy resin, as: Atlac430 epoxy bisphenol-A vinylite.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) the fibre composite reinforcement structure the present invention relates to is reasonable in design, mainly by spiral inner core, fiber cloth and basalt fibre bundle, be composited, and the fiber cloth and the basalt fibre bundle that as reinforcing material, use all adopt resin fully to flood, can not only effectively be satisfied with the design strength of reinforced concrete structure, simultaneously, can also overcome existing fibre reinforced composites (FRP) and have the defects such as material fragility is strong, price is high, there is stronger combination property, and cheap, suitablely extensively promote the use of.
(2) preparation method of the present invention is simple, adopt the hoop winding of basalt fibre bundle can effectively fill up the space existing between spiral inner core salient rib and fiber cloth, greatly reduce longitudinal fiber (fiber cloth) and spiral compound tense, the weakening of fiber cloth local buckling to its intensity, rigidity.
(3) the present invention is before double thread reinforcing bar inner core is cleared up, also need to carry out sanding operation, mainly due to the existing spiral both sides of buying on the market all with longitudinal michinaga rib of symmetry, tend to cause the fibre composite reinforcement cross section ovalize structure being composited, for this reason, before double thread reinforcing bar inner core decontamination step, also need to adopt sander to remove it, simple to operate, quick.
(4) the present invention proposes the processing method of fibre composite reinforcement face rib line, adopt polybag before resin solidification, fibre composite reinforcement is wound around to rib system, the more effective assurance fibre composite reinforcement of energy and external agency (as concrete) have good adhesive property, thereby improve the practicality of fibre composite reinforcement.
The specific embodiment
Below goal of the invention of the present invention, technical scheme and beneficial effect are described in further detail.
Should be noted that, it is all exemplary below describing in detail, be intended for the requested to provide further explanation of the invention, except as otherwise noted, all technology used herein and scientific terminology have the identical meanings of conventionally understanding with general technical staff of the technical field of the invention.
Reinforcing bar is widely used reinforcing material in current reinforced concrete structure (reinforced concrete structure), should possess stronger combination property, but there is the defects such as material fragility is strong, price is high based on existing fibre reinforced composites (FRP), the present invention proposes a kind of preparation method who is applicable to steel-continuous fiber composite reinforcing, this fibre composite reinforcement overcomes and not only has stronger combination property, and its price is also very cheap.This fibre composite reinforcement is mainly composited by spiral inner core, fiber cloth and basalt fibre bundle, there is rational structural texture, and the fiber cloth and the basalt fibre bundle that as reinforcing material, use all adopt resin fully to flood, can not only effectively be satisfied with the design strength of reinforced concrete structure, simultaneously, can also overcome existing fibre reinforced composites (FRP) and have the defects such as material fragility is strong, price is high, there is stronger combination property, and cheap, suitablely extensively promote the use of.
Below further describing fibre composite reinforcement of the present invention:
The fibre composite reinforcement the present invention relates to includes following three parts:
(a): spiral inner core;
(b): fiber cloth, this fiber cloth is wrapped in the outer surface of spiral inner core and forms with it twisted steel, can select carbon cloth (as: T700-12K carbon fiber) or basalt fiber cloth (as: CBF13-2400Tex basalt fibre) to be made;
(c): hoop is wound in the basalt fibre bundle between twisted steel rib tooth, can effectively fill up the space existing between spiral inner core salient rib and fiber cloth, greatly reduce longitudinal fiber (fiber cloth) and spiral compound tense, the weakening of fiber cloth local buckling to its intensity, rigidity.
In said structure, fiber cloth and basalt fibre Shu Shangjun are impregnated with resin, in actual fabrication process, can in mixed with resin device, complete the abundant dipping of resin, to reach the detail design intensity of reinforced concrete structure, it is very reasonable to design, wherein, resin can be selected epoxy resin, as: Atlac430 epoxy bisphenol-A vinylite.
With two exemplary embodiments, enumerate explanation concrete preparation method of the present invention below, certainly, protection scope of the present invention is not limited to following examples.
Embodiment 1:
In an embodiment, the preparation method of fibre composite reinforcement specifically comprises the following steps:
(1) processing: the HRB400 type spiral of purchase is processed into spiral inner core, and the key property of HRB400 type spiral is as shown in table 1:
Table 1
| Reinforcing bar type | Model | Yield strength (MPa) | Elastic modelling quantity (Gpa) | Weight (kg/m) | Diameter (mm) |
| Spiral | HRB400 | 420 | 200 | 0.617 | 10 |
First, use sander to remove the monosymmetric longitudinal michinaga rib of spiral, then, use after wipes of alcohol wash clean, then carry out following step.
(2) scrubbing: the embroidery of removing core outer surface in spiral with sand paper is dirty, then uses gauze to dip in acetone spiral inner core is cleaned up;
(3) fiber cloth brushing resin: select Atlac430 epoxy bisphenol-A vinylite as brushing resin, its material property is as shown in table 2:
Table 2
| Resin | Tensile strength (MPa) | Stretch modulus (Gpa) | Fracture elongation (%) | Density (g/m 3） |
| Atlac430 | 95 | 3.6 | 6.1 | 1.06 |
Carbon cloth 40 bundles that cutting T700-12K carbon fiber is made, and lay smooth, its one end is done temporary fixed with binding agent and spiral, then even brushing resin in fiber cloth, use subsequently evenly rolling extrusion of roller (rotary part), full to guarantee the resin-dipping in fiber cloth.
(4) fiber cloth parcel: use instrument (as long steel bar) compresses the other end of fiber cloth, from one end temporary fixed with spiral inner core, slowly rotate spiral inner core, and apply with spiral inner spindle to vertical stretching force, be wrapped in uniformly the outer surface of spiral inner core and form with it twisted steel fiber cloth is closely knit.
(5) fibre bundle is wound around: along twisted steel, compress axially, get rid of unnecessary resin, then, the rib tooth hoop winding of the basalt fibre bundle of Resin A tlac430 along twisted steel will be impregnated with again, form fibre composite reinforcement, wherein, the long Φ 10 spiral inner cores of the every winding of basalt fibre bundle 1m, need the basalt fibre bundle of 6.5m.
(6) curing molding: curing molding is an important process process in preparation process of the present invention, in the present embodiment, specifically comprises the steps:
A: the fibre composite reinforcement that step (5) is made is sent into resin impregnation device, adopts straight trough infusion process to complete the dipping of resin to fibre composite reinforcement;
B: preforming tool is passed in one end of flooding the fibre composite reinforcement of resin, and couple together with the hauling machine in steel strand wires and the place ahead, start hauling machine, fiber cloth, basalt fibre bundle are completed to compound with spiral inner core in preforming tool, meanwhile, unnecessary resin is squeezed and removed;
C: use electric winding machine, to carrying out hoop winding from preforming tool fibre composite reinforcement out, to form the rib trace of surperficial hoop, when practical operation, the spacing of rib trace and the depth all can be by regulating electric winding machine to control with plastic band;
D: the fibre composite reinforcement that above-mentioned steps c is made is sent into curing mold, complete the curing molding of fibre composite reinforcement, long 0.3～the 1.55m of general curing mold, its concrete length depends on the hauling speed of fibre composite reinforcement and the factors such as chemical reaction characteristic of resin system;
E: remove plastic band after resin solidification, make surface with the fibre composite reinforcement of rib line, arranging of this rib line can have good adhesive property with external agency (as concrete) by more effective assurance fibre composite reinforcement, the practicality of raising fibre composite reinforcement.
The fibre composite reinforcement making is tested, and its mechanical property is as shown in table 3:
Table 3
| Tested object | Diameter (mm) | Play mould (Gpa) | Intensity (MPa) |
| Embodiment 1 | 12 | 157 | 590 |
Embodiment 2:
The difference of the present embodiment and embodiment 1 is, the fiber cloth type difference of selection, and in this enforcement, the preparation method of fibre composite reinforcement specifically comprises the following steps:
(1) processing: the HRB400 type spiral of purchase is processed into spiral inner core, first, uses sander to remove the monosymmetric longitudinal michinaga rib of spiral, then, use after wipes of alcohol wash clean, then carry out following step.
(2) scrubbing: the embroidery of removing core outer surface in spiral with sand paper is dirty, then uses gauze to dip in acetone spiral inner core is cleaned up;
(3) fiber cloth brushing resin: select Atlac430 epoxy bisphenol-A vinylite as brushing resin, basalt fiber cloth 30 bundles that cutting CBF13-2400Tex basalt fibre is made, and lay smooth, its one end is done temporary fixed with binding agent and spiral, then even brushing resin in fiber cloth, use subsequently evenly rolling extrusion of roller (rotary part), full to guarantee the resin-dipping in fiber cloth.
(4) fiber cloth parcel: use instrument (as long steel bar) compresses the other end of fiber cloth, from one end temporary fixed with spiral inner core, slowly rotate spiral inner core, and apply with spiral inner spindle to vertical stretching force, be wrapped in uniformly the outer surface of spiral inner core and form with it twisted steel fiber cloth is closely knit.
(5) fibre bundle is wound around: along twisted steel, compress axially, get rid of unnecessary resin, then, the rib tooth hoop winding of the basalt fibre bundle of Resin A tlac430 along twisted steel will be impregnated with again, form fibre composite reinforcement, wherein, the long Φ 10 spiral inner cores of the every winding of basalt fibre bundle 1m, need the basalt fibre bundle of 7.2m.
(6) curing molding: curing molding is an important process process in preparation process of the present invention, in the present embodiment, specifically comprises the steps:
A: the fibre composite reinforcement that step (5) is made is sent into resin impregnation device, adopts straight trough infusion process to complete the dipping of resin to fibre composite reinforcement;
B: preforming tool is passed in one end of flooding the fibre composite reinforcement of resin, and couple together with the hauling machine in steel strand wires and the place ahead, start hauling machine, fiber cloth, basalt fibre bundle are completed to compound with spiral inner core in preforming tool, meanwhile, unnecessary resin is squeezed and removed;
C: use electric winding machine, to carrying out hoop winding from preforming tool fibre composite reinforcement out, to form the rib trace of surperficial hoop, when practical operation, the spacing of rib trace and the depth all can be by regulating electric winding machine to control with plastic band;
D: the fibre composite reinforcement that above-mentioned steps c is made is sent into curing mold, complete the curing molding of fibre composite reinforcement, long 0.3～the 1.55m of general curing mold, its concrete length depends on the hauling speed of fibre composite reinforcement and the factors such as chemical reaction characteristic of resin system;
E: remove plastic band after resin solidification, make surface with the fibre composite reinforcement of rib line, arranging of this rib line can have good adhesive property with external agency (as concrete) by more effective assurance fibre composite reinforcement, the practicality of raising fibre composite reinforcement.
The fibre composite reinforcement making is tested, and its mechanical property is as shown in table 4:
Table 4
| Tested object | Diameter (mm) | Play mould (Gpa) | Intensity (MPa) |
| Embodiment 2 | 13.2 | 140 | 586 |
The fibre composite reinforcement that the present invention is made and regular reinforcement and fibre reinforced composites (FRP) carry out comprehensive comparison, as shown in table 5:
Table 5
| Tested object | Intensity | Play mould | Ductility | Weight | Price | Corrosion resistance |
| Reinforcing bar | Low | High | Good | Heavy | Low | Poor |
| FRP | High | Lower than reinforcing bar | Low | Gently | High | Better |
| Embodiment 1 | Higher | Higher | Good | Lighter | Lower | Better |
| Embodiment 2 | Higher | Higher | Good | Lighter | Lower | Better |
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, and any simple modification, equivalent variations that every foundation technical spirit of the present invention is done above embodiment, within all falling into protection scope of the present invention.
Claims (5)
1. a preparation method who is applicable to steel-continuous-fiber composite-rib, is characterized in that: this fibre composite reinforcement is mainly composited by spiral inner core, fiber cloth and basalt fibre bundle, and its composite steps comprises:
A: scrubbing: the embroidery of removing core outer surface in spiral with sand paper is dirty, then uses acetone that spiral inner core is cleaned up;
B: parcel fiber cloth: brushing resin in fiber cloth, until epoxy resin impregnated full after, fiber cloth is wrapped in to the outer surface of spiral inner core and forms with it twisted steel;
C: be wound around basalt fibre bundle: by being impregnated with the rib tooth hoop winding of the basalt fibre bundle of resin along twisted steel, form fibre composite reinforcement;
D: curing molding.
2. a kind of preparation method who is applicable to steel-continuous-fiber composite-rib according to claim 1, it is characterized in that: described preparation method also comprises the procedure of processing of double thread reinforcing bar inner core: first, use sander to remove the monosymmetric longitudinal michinaga rib of spiral, then, use after wipes of alcohol wash clean, then carry out described A step.
3. a kind of preparation method who is applicable to steel-continuous-fiber composite-rib according to claim 1, is characterized in that: in described D step, curing molding comprises:
A: the fibre composite reinforcement that step C is made is sent into resin impregnation device, completes the dipping of resin to fibre composite reinforcement;
B: the fibre composite reinforcement that is impregnated with resin is sent into preforming tool and complete the crowded of unnecessary resin and remove;
C: use plastic band, to carrying out hoop winding from preforming tool fibre composite reinforcement out;
D: the fibre composite reinforcement that above-mentioned steps c is made is sent into curing mold, completes the curing molding of fibre composite reinforcement;
E: remove plastic band after resin solidification, make surface with the fibre composite reinforcement of rib line.
4. according to a kind of preparation method who is applicable to steel-continuous-fiber composite-rib described in claim 1～3 any one, it is characterized in that: described fiber cloth is carbon cloth or basalt fiber cloth.
5. according to a kind of preparation method who is applicable to steel-continuous-fiber composite-rib described in claim 1～3 any one, it is characterized in that: described resin is epoxy resin.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100327A (en) * | 2017-05-08 | 2017-08-29 | 佛山科学技术学院 | The concrete structure and implementation method of a kind of carbon cloth parcel reinforcing bar |
| CN107443542A (en) * | 2017-08-04 | 2017-12-08 | 东南大学 | A kind of FRP presstressed reinforcing steels fragment-free track slab and preparation method thereof |
| CN107574725A (en) * | 2017-08-04 | 2018-01-12 | 东南大学 | A kind of double-block type ballastless track plate and preparation method thereof |
| CN111169042A (en) * | 2020-01-06 | 2020-05-19 | 尚良仲毅(沈阳)高新科技有限公司 | Carbon fiber bolt processing method and carbon fiber bolt |
| CN111501383A (en) * | 2020-04-08 | 2020-08-07 | 潍坊中创新材料科技有限公司 | Novel basalt fiber composite rib and preparation method and application thereof |
| CN112060623A (en) * | 2020-08-14 | 2020-12-11 | 航天科工武汉磁电有限责任公司 | LFT-G forming process of fiber reinforced composite hub cover |
| CN112976605A (en) * | 2021-02-04 | 2021-06-18 | 哈尔滨玻璃钢研究院有限公司 | Forming method of low-cost double-flanging flange structure |
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| CN1760015A (en) * | 2005-11-07 | 2006-04-19 | 伦慧东 | Technique for steel-plastic composite tube enhanced by antistatic flame retardant Nano fibers |
| CN1936206A (en) * | 2006-10-24 | 2007-03-28 | 东南大学 | Steel-continuous-fiber composite-rib reinforced concrete earthquake-resisting structure |
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| CN1760015A (en) * | 2005-11-07 | 2006-04-19 | 伦慧东 | Technique for steel-plastic composite tube enhanced by antistatic flame retardant Nano fibers |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100327A (en) * | 2017-05-08 | 2017-08-29 | 佛山科学技术学院 | The concrete structure and implementation method of a kind of carbon cloth parcel reinforcing bar |
| CN107443542A (en) * | 2017-08-04 | 2017-12-08 | 东南大学 | A kind of FRP presstressed reinforcing steels fragment-free track slab and preparation method thereof |
| CN107574725A (en) * | 2017-08-04 | 2018-01-12 | 东南大学 | A kind of double-block type ballastless track plate and preparation method thereof |
| CN107574725B (en) * | 2017-08-04 | 2019-05-28 | 东南大学 | A kind of double-block type ballastless track plate and preparation method thereof |
| CN111169042A (en) * | 2020-01-06 | 2020-05-19 | 尚良仲毅(沈阳)高新科技有限公司 | Carbon fiber bolt processing method and carbon fiber bolt |
| CN111501383A (en) * | 2020-04-08 | 2020-08-07 | 潍坊中创新材料科技有限公司 | Novel basalt fiber composite rib and preparation method and application thereof |
| CN111501383B (en) * | 2020-04-08 | 2021-06-18 | 潍坊中创新材料科技有限公司 | Novel basalt fiber composite rib and preparation method and application thereof |
| CN112060623A (en) * | 2020-08-14 | 2020-12-11 | 航天科工武汉磁电有限责任公司 | LFT-G forming process of fiber reinforced composite hub cover |
| CN112976605A (en) * | 2021-02-04 | 2021-06-18 | 哈尔滨玻璃钢研究院有限公司 | Forming method of low-cost double-flanging flange structure |
| CN112976605B (en) * | 2021-02-04 | 2022-06-28 | 哈尔滨玻璃钢研究院有限公司 | Forming method of low-cost double-flanging flange structure |
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