CN207160420U - A kind of spiral fiber - Google Patents
A kind of spiral fiber Download PDFInfo
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- CN207160420U CN207160420U CN201720306351.4U CN201720306351U CN207160420U CN 207160420 U CN207160420 U CN 207160420U CN 201720306351 U CN201720306351 U CN 201720306351U CN 207160420 U CN207160420 U CN 207160420U
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Abstract
The utility model discloses a kind of spiral fiber, the geometry of the center line of the fiber in three dimensions is：Wherein, x, y and z represent the coordinate of any point of spiral in three dimensions respectively, are determined respectively by f, g and h in A domains, and t is generic function.Spiral fiber provided by the utility model, it can mix in cement or plastics and other base with the performance of reinforcing material.
Description
Technical field
A kind of fibrous material is the utility model is related to, more particularly to a kind of spiral fiber.
Background technology
It will not be connected using bridge formation mechanism (fiber built bridge on crack and be transferred to tensile stress the ability of cracking section)
Continuous chopped fiber is arbitrarily mixed in concrete, and obtained composite is fibre reinforced concrete, and chopped fiber is mixed into concrete
In can lift the material property of concrete.When there is microcrack, fiber can avoid crack growth, increase the limit of concrete
Intensity.If the combination property of fiber and pointing is good, microcrack can be controlled to continue to expand, postpone the formation in grand crack from
And increase toughness and ductility after the fracture of concrete.Thus control concrete can be reached by the width and spacing for reducing crack
Crack purpose.The adverse effect of chemical substance and water to structure can be reduced by reducing fracture width, so as to lift structure
Long-Term Properties.This performance of fiber can be used for being lifted the durability and applicability of reinforced concrete structure, keep former
The service life of design.
Numerous studies find that fiber (including steel part and synthetic products) can be such as shrinkproof as the substitute of secondary reinforcing bar
Reinforcing bar and temperature reinforcement.Research shows, the use number of stirrup in reinforced concrete structure can be not only reduced after addition steel fibre
Amount, moreover it is possible to reduce the use of horizontal shearing force reinforcing bar, while the overall ductility of lift structure, control critical eigenvalue expands.But due to business
The benefit-cost ratio of chemical fibre dimension, fibre reinforced concrete fail to apply in large scale structure.Most of fibers of in the market, such as
The actual amount of end hook fiber and corrugate steel fibers and polypropylene fibre can not show its favourable structural behaviour, and have
The price of preferable structural behaviour fiber is again higher, and such as twisted fiber, while the ratio in concrete synthesis composition has strictly again
It is required that.
Utility model content
The purpose of this utility model is to provide a kind of fiber with helical structure, and it is used for cement or plastics and other base knot
In structure, material property can be improved.
Based on above mentioned problem, technical scheme provided by the utility model is：
A kind of spiral fiber, the geometry of the center line of the fiber in three dimensions are：
Wherein, x, y and z represent the coordinate of any point of spiral in three dimensions respectively, are the function of t in A domains respectively.
In some embodiments wherein, the geometry of the center line of the fiber in three dimensions is：
Wherein, D is the diameter of spiral fiber, and c is dimensionless constant, and 2 π c are equal to spiral two adjacent rings corresponding points in central diameter
On axial distance.
In some embodiments wherein, the geometric index parameter G of the fiberIFor：
Wherein,
N is the quantity of fibre circumference, and N scope is 0~40；
OD is fiber outer diameter, and OD scope is 0.2~10mm；
WDeqIt is line diameter, WDeqScope is 0.1~1.2mm；
LfFor fibre length, LfScope be 4~60mm；
GIScope be 0~20.
In some embodiments wherein, the fiber using include metal, glass, carbon, polyacrylonitrile, polypropylene,
Polyethylene, polyolefin or polyvinyl alcohol material are made.
In some embodiments wherein, the fiber applications are in cement or plastic matrix.
Compared with prior art, the utility model has the advantages that：
Using the technical solution of the utility model, the spiral fiber has good drawing property, mixed cement or
In plastics and other base, the performance of material can be improved, increases the ultimate strength and toughness of matrix.
Brief description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment
The accompanying drawing used is briefly described, and drawings in the following description are only some embodiments of the utility model, for ability
For the those of ordinary skill of domain, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other attached
Figure.
Fig. 1 is a kind of structural representation of spiral fiber of the utility model；
Fig. 2 is the projection structure schematic diagram of clamping device in omnipotent test machine in the utility model embodiment；
Fig. 3 is the entity structure schematic diagram of clamping device in omnipotent test machine in the utility model embodiment；
Fig. 4 is the drawing property curve map of spiral fiber in the utility model embodiment；
Fig. 5 is the structural representation of crooked experiment device in the utility model embodiment；
Fig. 6 is using the concrete block of spiral fiber and the existing fiber in market in the utility model embodiment
Anti-bending strength comparison diagram；
Fig. 7 is the schematic diagram of critical deflection test device in the utility model embodiment；
Fig. 8 (a), the critical shear performance chart that 8 (b) is the utility model embodiment middle cross beam；
Fig. 9 is the critical deflection performance chart of the utility model embodiment middle cross beam；
Wherein,
1st, 10, concrete block；2nd, spiral fiber；3rd, plastic selector；4th, rod iron；5th, pull-out test wrench；6、11、
Roller support；7th, 12, loaded roll；8th, support；9th, 14, Linear displacement transducer；13rd, crossbeam；15th, dowel；16th, tension reinforcement.
Embodiment
Such scheme is described further below in conjunction with specific embodiment.It should be understood that these embodiments are to be used to illustrate
The utility model and be not limited to limit the scope of the utility model.The implementation condition used in embodiment can be according to specific producer
Condition do further adjustment, unreceipted implementation condition is usually the condition in normal experiment.
The utility model provides a kind of spiral fiber, for mixing in concrete or plastics and other base to improve the property of material
Can, the geometry of the center line of fiber in three dimensions meets formula (1)：
Wherein, x, y and z represent the coordinate of any point of spiral in three dimensions respectively, are the function of t in A domains respectively.
In a preferred embodiment, spiral fiber is steady circular's helix, and its structure meets formula in three dimensions
(2)：
Wherein, D is the diameter of spiral fiber, and c is dimensionless constant, and 2 π c are equal to spiral two adjacent rings corresponding points in central diameter
On axial distance.
It is a kind of structural representation of spiral fiber referring to Fig. 1, N is the quantity of fibre circumference in figure, and OD is outside fiber
Footpath, WDeq.For line diameter, LfFor fibre length.
For cylindrical and prismatic wire rod, WDeqIt can be calculated by formula (3)：
Wherein, AwireFor the cross-sectional area of wire rod.
The geometric parameter of spiral fiber can calculate according to (4), (5)：
(5)
OD=D+WDeq.
The geometric index parameter G of fiberIFor：
Wherein, N is the quantity of fibre circumference, and OD is fiber outer diameter, WDeq.For equivalent line diameter, Lf is fibre length；
The scope that preferable N scope is 0~40, OD is 0.2~10mm, WDeq.Scope be 0.1~1.2mm, LfScope for 4~
60mm, GIScope be 0~20.
In order to test the drawing property of spiral fiber, drawing experiment, ginseng are carried out at the both ends of fiber using omnipotent test machine
See Fig. 2-3, spiral fiber 2 cast in the independent concrete block 1 that two sizes are 65 millimeters × 65 millimeters × 100 millimeters and
Into, in casting concrete block 1, the steel pipe that internal diameter is 16 millimeters is placed in every block concrete block 1, coordinates rearmounted rod iron 4, will
Sample is tightly clamped.First, spiral fiber 2 is inserted in the sample components of concrete block 1, allows it to solidify 24 hours；Mixed
After solidifying soil block 1 is hardened, a plastic selector 3, another sample of concrete block 1 of then casting are placed at the top of it；Casting
Solidify afterwards 28 days.Concrete block 1 is clamped in pull-out test wrench 5, with displacement-controlled method with the speed of 0.6 mm/min
Degree carries out fibre drawing process.
Prepare concrete cylindrical (a diameter of 150 millimeters, be highly 300 millimeters), the target strength of concrete cylindrical
(fck) it is 35MPa.Table 1 lists the dry composition of every cubic metre of mixing material.With Bit andits control compression testing machine in pure concrete
Compression test is carried out on cylinder sample.Compression test program observes BS EN 12390-3 (2009) standard, and the cylinder of concrete resists
Compressive Strength is 36 ± 1.2MPa, is collapsed 26 millimeters.
The coagulation local soil type distribution ratio of table 1
Referring to Fig. 4, for the drawing property curve map of different structure spiral fiber, the spiral fiber of different structure passes through " SD-
N-OD-WDeq-Lf" be identified, the structure for illustrating fiber is spiral, circumference quantity N, external diameter OD, line diameter WDeqAnd length
Lf, as seen from Figure 4, spiral fiber has sliding hardening characteristics.
In order to test the anti-bending strength of the concrete block of doping spiral fiber, according to ASTM C1609/C1609M-12
(2012) four-point bending test is carried out, is tested using closed-loop control universal testing machine by Bit andits control, tests concrete
The size of block sample is 150 millimeters × 150 millimeters × 550 millimeters, referring to the structural representation that Fig. 5 is crooked experiment device, bag
Roller support 6 and loaded roll 7 are included, concrete block 10 is placed between roller support 6 and loaded roll 7, in the upper cover of concrete block 10
If a support 8, Linear displacement transducer 9 is set respectively along the both sides of the length direction of support 8 to measure the vertical plane of concrete block 10
Midspan deflection, average as the net amount of deflection of the mid-span of sample.Testing machine is arranged to the constant speed increase with 0.1 mm/min
The net amount of deflection of sample.When net amount of deflection is more than 0.6 millimeter, loading velocity increases to 0.3 mm/min, and speedup is arranged to
0.05 mm/min.
Spiral fiber (SD-9-1.45-0.4-40) G usedI=0.82, steel fu=1500MPa, fiber volume fraction
(Vf) include 0.2%, 0.35%, 0.5%, and 0.65%, to examine influence of the spiral fiber to concrete anti-bending strength.Often
Kind fiber volume fraction three samples of casting are tested, and the anti-bending strength value as steel fiber reinforced concrete of averaging.It is mixed
The cylindrical compressive strength for coagulating soil is 35 ± 2.8MPa, is collapsed 26 ± 3.5 millimeters.Fig. 6 is illustrated with different content Fresh fats
SFRC samples average load-sag curve (the average design cylinder strength of concrete is 35MPa).Fiber concrete
Flexural property provides in table 2.Further comprises in order to compare, in figure end hook type steel fibers with 0.5% volume content and
Crimp the result of the fiber concrete sample of type steel fibers.
The bending property of fibre concrete block is shown in Table 2, in table 21Rupture modulus；2Elastic ultimate load；3Load after cracking
Peak value；4Residual strength when net amount of deflection is 10 millimeters；5Toughness (0-10 millimeter load deflections TG-AUC).
The bending property of the concrete block of 2 different fiber contents of table
In implementation, two groups of reinforced concrete beams of casting, the critical shear and critical deflection of concrete beam are tested, with
Influence of the spiral fiber to reinforced concrete member overall performance is tested, is tested using four-point loading, the size of crossbeam is
130 millimeters × 165 millimeters × 1200 millimeters, span length is 1100 millimeters, and the effective depth in all sample sections is 140 millis
Rice.The experiment parameter of critical shear experiment middle cross beam is fiber volume fraction (Vf), concrete strength (fck), longitudinal reinforcement matches somebody with somebody
Muscle rate (ρ) and shear span and effective depth ratio (a/d).Different concrete strength (f is used in critical deflection experiment middle cross beamck) and
Longitudinal steel ratio values (ρ), wherein providing the shear reinforcement of abundance, it is ensured that bending failure pattern.
Experiment setting and the reinforcement manner of critical deflection crossbeam sample are as shown in fig. 7, test device includes Rolling base 11
With loaded roll 12, crossbeam 13 is arranged between Rolling base 11 and loaded roll 12, sets linear displacement to pass in the lower section of crossbeam 13
Sensor 14, crossbeam 13 is interior to be provided with dowel 15 and tension reinforcement 16.
Two beams from each classification (failure by shear and bending failure) are illustrated in Fig. 8 (a), 8 (b) and Fig. 9
Load-deflection relation, wherein fck=35 ± 3.1MPa, VfShearing span and effective depth ratio in=0.5%, Fig. 8 (a), 8 (b)
Respectively 1.5 and 3.The concrete using the existing steel fiber product of in the market (end hook type and curled) is also list in figure
The load of beam-amount of deflection performance.The normal concrete beams for not adding fiber are also listed as reference.Failure by shear and bending failure
Pattern is marked in the legend of beam.For example, " BS-0.55-0.5-N-3 " represents that beam is failure by shear, the ratio of reinforcement is
0.55%, the steel fibre containing volume content 0.5%, it is 3 that it, which shears span with effective depth ratio,.The Part IV of label represents
Fiber type, i.e. N, H and C represent new, end hook type and curled fiber respectively.In addition, " BF-0.31-0 " represents that beam is
Bending failure, the ratio of reinforcement 0.31%, its not fibre-bearing (Vf=0%), it is seen then that the spiral fiber in the utility model is than existing
The steel fibre for having technology has more preferable critical shear performance and critical deflection performance.
For examples detailed above only to illustrate technical concepts and features of the present utility model, its object is to allow be familiar with technique
Personnel can understand content of the present utility model and implement according to this, can not limit the scope of protection of the utility model with this.It is all
The equivalent transformation done according to the utility model Spirit Essence or modification, should all cover the scope of protection of the utility model it
It is interior.
Claims (3)
1. a kind of spiral fiber, it is characterised in that the geometry of the center line of the fiber in three dimensions is：
Wherein, D is the diameter of spiral fiber, and c is dimensionless constant, and 2 π c are equal to spiral two adjacent rings corresponding points in central diameter
Axial distance；
The geometric index parameter G of the fiberIFor：
Wherein,
N is the quantity of fibre circumference, and N scope is 0~40；
OD is fiber outer diameter, and OD scope is 0.2~10mm；
WDeq.For equivalent line diameter, WDeq.Scope be 0.1~1.2mm；
LfFor fibre length, LfScope be 4~60mm；
GIScope be 0~20.
A kind of 2. spiral fiber according to claim 1, it is characterised in that：The fiber is using metal, glass, carbon, poly-
Acrylonitrile, polypropylene, polyethylene, polyolefin or polyvinyl alcohol material are made.
A kind of 3. spiral fiber according to claim 2, it is characterised in that：The fiber applications are in cement or plastic matrix
In.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720306351.4U CN207160420U (en) | 2017-03-27 | 2017-03-27 | A kind of spiral fiber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720306351.4U CN207160420U (en) | 2017-03-27 | 2017-03-27 | A kind of spiral fiber |
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| CN207160420U true CN207160420U (en) | 2018-03-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884503A (en) * | 2017-03-27 | 2017-06-23 | 西交利物浦大学 | A kind of spiral fiber |
| US11845693B2 (en) | 2018-05-18 | 2023-12-19 | Pensmore Reinforcement Technologies, Llc | Twisted reinforcement fibers and method of making |
-
2017
- 2017-03-27 CN CN201720306351.4U patent/CN207160420U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884503A (en) * | 2017-03-27 | 2017-06-23 | 西交利物浦大学 | A kind of spiral fiber |
| WO2018177282A1 (en) * | 2017-03-27 | 2018-10-04 | 西交利物浦大学 | Spiral fiber |
| US11845693B2 (en) | 2018-05-18 | 2023-12-19 | Pensmore Reinforcement Technologies, Llc | Twisted reinforcement fibers and method of making |
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