CN104060766A - Steel-continuous-fiber composite bar for building - Google Patents

Steel-continuous-fiber composite bar for building Download PDF

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Publication number
CN104060766A
CN104060766A CN201410267035.1A CN201410267035A CN104060766A CN 104060766 A CN104060766 A CN 104060766A CN 201410267035 A CN201410267035 A CN 201410267035A CN 104060766 A CN104060766 A CN 104060766A
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China
Prior art keywords
cloth
resin
steel
fiber composite
indented bars
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Pending
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CN201410267035.1A
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Chinese (zh)
Inventor
王灵
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Sichuan Aerospace Wuyuan Composite Co Ltd
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Sichuan Aerospace Wuyuan Composite Co Ltd
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Priority to CN201410267035.1A priority Critical patent/CN104060766A/en
Publication of CN104060766A publication Critical patent/CN104060766A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a steel-continuous-fiber composite bar for a building. The fiber composite bar is formed by compounding a threaded reinforcing steel bar inner core, fiber cloth and a basalt fiber bundle and has a reasonable structure. The fiber cloth and the basalt fiber bundle used as reinforcing materials are fully immersed by using resin and can effectively satisfy the design strength of a reinforced concrete structure. Meanwhile, the steel-continuous-fiber composite bar further can overcome the deficiencies of strong brittleness, high price and the like of existing fiber reinforced plastic (FRP) and is suitable for wide popularization and use.

Description

A kind of steel-continuous-fiber composite-rib for building
Technical field
The present invention is a kind of construction steel-continuous fiber composite reinforcing, and 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, fireproof performance is good, save steel and low cost and other advantages than steel work, also be a kind of construction more common in current construction work, be used for various super-high buildings, longspan structure, as the load structure such as bridge, tunnel.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 earthquake resistant structure that uses these fibre reinforced composites (FRP) and concrete binding to form disclosed, but in the time that 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) reinforcing rib 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 construction steel-continuous fiber composite reinforcing, this fibre composite reinforcement is composited by indented bars inner core, cloth and basalt fibre bundle, there is rational structural texture, and the cloth and the basalt fibre bundle that use as reinforcing material all adopt resin fully to flood, can 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, suitablely extensively promote the use of.
The present invention is achieved through the following technical solutions: a kind of construction steel-continuous fiber composite reinforcing, 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 indented bars inner core, cloth and basalt fibre bundle, cloth is wrapped in the external surface of indented bars inner core and forms with it twisted steel, and described basalt fibre bundle hoop is wound in the rib diastema of twisted steel.
In the present invention, described cloth is carbon cloth or basalt fiber cloth, and both differ from one another, wherein, carbon cloth stable performance, modulus of elasticity 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.
For better realizing said structure, in described cloth, be coated with and be brushed with resin, described indented bars inner core is bonding by resin and cloth.
Described basalt fibre bundle is the reinforcing material that is impregnated with resin, described twisted steel is bonding by resin and basalt fibre bundle, in actual fabrication process, basalt fibre bundle can complete the abundant dipping of resin in mixed with resin device, to reach the working design intensity of reinforced concrete structure, it is very reasonable to design.
To better implement the present invention, described resin is epoxy resin, as: Atlac430 epoxy bisphenol-A vinylite.
Also be provided with the rib line being formed by plastic cement system with ribbing at described fibre composite reinforcement external surface, its rib process processed is as follows: at the recombination process of fibre composite reinforcement and resin when uncured, use plastic band hoop to be wrapped on fibre composite reinforcement, after resin solidification, remove plastic band, and make surface with the fibre composite reinforcement of rib line, thereby the more effective guarantee fibre composite reinforcement of energy and external agency (as concrete) have good adhesive property, improve the practicality of fibre composite reinforcement.
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 be composited by indented bars inner core, cloth and basalt fibre bundle, and the cloth and the basalt fibre bundle that use as reinforcing material 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 indented bars inner core salient rib and cloth, greatly reduce longitudinal fiber (cloth) and indented bars compound tense, the weakening of cloth local buckling to its intensity, rigidity.
(3) the present invention is reasonable in design, and cloth can adopt carbon cloth or basalt fiber cloth, and both differ from one another, wherein, carbon cloth stable performance, modulus of elasticity 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.
(4) the present invention proposes the processing method of fibre composite reinforcement face rib line, adopt plastic band before resin solidification, fibre composite reinforcement is wound around to rib system, the more effective guarantee fibre composite reinforcement of energy and external agency (as concrete) have good adhesive property, thereby improve the practicality of fibre composite reinforcement.
Detailed description of the invention
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 construction 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 indented bars inner core, cloth and basalt fibre bundle, there is rational structural texture, and the cloth and the basalt fibre bundle that use as reinforcing material 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): indented bars inner core;
(b): cloth, this cloth is wrapped in the external surface of indented bars 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 indented bars inner core salient rib and cloth, greatly reduce longitudinal fiber (cloth) and indented bars compound tense, the weakening of cloth local buckling to its intensity, rigidity.
In said structure, 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 working 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.
Enumerate explanation concrete preparation method of the present invention with two exemplary embodiments 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 indented bars of purchase is processed into indented bars inner core, and the key property of HRB400 type indented bars is as shown in table 1:
Table 1
Reinforcing bar type Model Yield strength (MPa) Modulus of elasticity (Gpa) Weight (kg/m) Diameter (mm)
Indented bars HRB400 420 200 0.617 10
First, use sander to remove the monosymmetric longitudinal michinaga rib of indented bars, then, use after wipes of alcohol wash clean, then carry out following step.
(2) scrubbing: remove the embroidery dirt of core outer surface in indented bars with sand paper, then use gauze to dip in acetone indented bars inner core is cleaned up;
(3) 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
The carbon cloth 40 that cutting T700-12K carbon fiber is made is restrainted, and lay smooth, its one end is done temporary fixed with cementing agent and indented bars, then even brushing resin in cloth, use subsequently evenly rolling extrusion of roller (rotary part), full to ensure the resin-dipping in cloth.
(4) cloth parcel: use instrument (as long steel bar) compresses the other end of cloth, from one end temporary fixed with indented bars inner core, slowly rotate indented bars inner core, and apply with indented bars inner spindle to vertical stretching force, be wrapped in uniformly the external surface of indented bars inner core and form with it twisted steel closely knit cloth.
(5) fiber bundle is wound around: along twisted steel axial compression, get rid of unnecessary resin, then, again the basalt fibre bundle that is impregnated with Resin A tlac430 is wound around along the rib tooth hoop of twisted steel, form fibre composite reinforcement, wherein, the long Φ 10 indented bars inner cores of the every winding of basalt fibre bundle 1m, need the basalt fibre bundle of 6.5m.
(6) surfacing: at the recombination process of fibre composite reinforcement and resin when uncured, use plastic band hoop to be wrapped on fibre composite reinforcement, after resin solidification, remove plastic band, make the fibre composite reinforcement of surface with rib line, thereby the more effective guarantee fibre composite reinforcement of energy and external agency (as concrete) have good adhesive property, improve the practicality of 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 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 indented bars of purchase is processed into indented bars inner core, first, uses sander to remove the monosymmetric longitudinal michinaga rib of indented bars, then, use after wipes of alcohol wash clean, then carry out following step.
(2) scrubbing: remove the embroidery dirt of core outer surface in indented bars with sand paper, then use gauze to dip in acetone indented bars inner core is cleaned up;
(3) cloth brushing resin: select Atlac430 epoxy bisphenol-A vinylite as brushing resin, the basalt fiber cloth 30 that cutting CBF13-2400Tex basalt fibre is made is restrainted, and lay smooth, its one end is done temporary fixed with cementing agent and indented bars, then even brushing resin in cloth, use subsequently evenly rolling extrusion of roller (rotary part), full to ensure the resin-dipping in cloth.
(4) cloth parcel: use instrument (as long steel bar) compresses the other end of cloth, from one end temporary fixed with indented bars inner core, slowly rotate indented bars inner core, and apply with indented bars inner spindle to vertical stretching force, be wrapped in uniformly the external surface of indented bars inner core and form with it twisted steel closely knit cloth.
(5) fiber bundle is wound around: along twisted steel axial compression, get rid of unnecessary resin, then, again the basalt fibre bundle that is impregnated with Resin A tlac430 is wound around along the rib tooth hoop of twisted steel, form fibre composite reinforcement, wherein, the long Φ 10 indented bars inner cores of the every winding of basalt fibre bundle 1m, need the basalt fibre bundle of 7.2m.
(6) surfacing: at the recombination process of fibre composite reinforcement and resin when uncured, use plastic band hoop to be wrapped on fibre composite reinforcement, after resin solidification, remove plastic band, make the fibre composite reinforcement of surface with rib line, thereby the more effective guarantee fibre composite reinforcement of energy and external agency (as concrete) have good adhesive property, improve the practicality of 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 plain bars 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 (6)

1. construction steel-continuous fiber composite reinforcing, it is characterized in that: this fibre composite reinforcement is mainly composited by indented bars inner core, cloth and basalt fibre bundle, cloth is wrapped in the external surface of indented bars inner core and forms with it twisted steel, and described basalt fibre bundle hoop is wound in the rib diastema of twisted steel.
2. a kind of construction steel-continuous fiber composite reinforcing according to claim 1, is characterized in that: described cloth is carbon cloth or basalt fiber cloth.
3. a kind of construction steel-continuous fiber composite reinforcing according to claim 1, is characterized in that: in described cloth, be coated with and be brushed with resin, described indented bars inner core is bonding by resin and cloth.
4. a kind of construction steel-continuous fiber composite reinforcing according to claim 1, is characterized in that: described basalt fibre bundle is the reinforcing material that is impregnated with resin, and described twisted steel is bonding by resin and basalt fibre bundle.
5. according to a kind of construction steel-continuous fiber composite reinforcing described in claim 3 or 4 any one, it is characterized in that: described resin is epoxy resin.
6. a kind of construction steel-continuous fiber composite reinforcing according to claim 1, is characterized in that: be also provided with the rib line being formed by plastic cement system with ribbing at described fibre composite reinforcement external surface.
CN201410267035.1A 2014-06-16 2014-06-16 Steel-continuous-fiber composite bar for building Pending CN104060766A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105821832A (en) * 2016-03-23 2016-08-03 武汉大学 Self-healing concrete pile preventing frost heaving and bonding weakening
CN109020285A (en) * 2018-09-20 2018-12-18 大连理工大学 A kind of basalt fibre is wrapped around micro- muscle of structural steel shape fiber stem
CN110821047A (en) * 2019-12-13 2020-02-21 南通装配式建筑与智能结构研究院 Composite steel bar FRP stirrup and preparation method thereof
CN114016667A (en) * 2021-12-17 2022-02-08 上海宝冶工程技术有限公司 Steel-fiber bundle composite material and application thereof

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105821832A (en) * 2016-03-23 2016-08-03 武汉大学 Self-healing concrete pile preventing frost heaving and bonding weakening
CN109020285A (en) * 2018-09-20 2018-12-18 大连理工大学 A kind of basalt fibre is wrapped around micro- muscle of structural steel shape fiber stem
CN110821047A (en) * 2019-12-13 2020-02-21 南通装配式建筑与智能结构研究院 Composite steel bar FRP stirrup and preparation method thereof
CN114016667A (en) * 2021-12-17 2022-02-08 上海宝冶工程技术有限公司 Steel-fiber bundle composite material and application thereof

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Application publication date: 20140924