CN113152201B - Mixed fiber warp knitting grid - Google Patents

Mixed fiber warp knitting grid Download PDF

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CN113152201B
CN113152201B CN202011567303.3A CN202011567303A CN113152201B CN 113152201 B CN113152201 B CN 113152201B CN 202011567303 A CN202011567303 A CN 202011567303A CN 113152201 B CN113152201 B CN 113152201B
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grid
modulus
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low
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CN113152201A (en
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汪昕
梁训美
吴智深
张晓非
赵纯锋
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Shandong Road Engineering Materials Co ltd
Southeast University
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Shandong Road Engineering Materials Co ltd
Southeast University
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00—Details of pavings
    • E01C11/16—Reinforcements
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00—Foundations for pavings
    • E01C3/04—Foundations produced by soil stabilisation
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
    • E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines
    • E02D17/202—Securing of slopes or inclines with flexible securing means
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/60—Planning or developing urban green infrastructure

Abstract

The invention discloses a warp knitting grid of hybrid fiber, belonging to the field of civil engineering materials, which is formed by warp knitting a longitudinal hybrid fiber grid branch and a transverse hybrid fiber grid branch, and is characterized in that: the longitudinal hybrid fiber grid branch is a first hybrid fiber grid branch formed by mixing high-modulus fiber bundles and low-modulus fiber bundles; the transverse hybrid fiber grid branch is a second hybrid fiber grid branch formed by mixing high-modulus fiber bundles and low-modulus fiber bundles. The invention utilizes the characteristics of different performances of the high-modulus fiber and the low-modulus fiber to compound the high-modulus fiber bundle and the low-modulus fiber bundle into the hybrid fiber grating for a single grating, and weaves to form the hybrid warp-knitted grating, thereby fully utilizing the advantages of the high-modulus fiber and the low-modulus fiber, having high bearing capacity, large ductility and certain price advantage and having wide application prospect in civil engineering.

Description

Mixed fiber warp knitting grid
Technical Field
The invention belongs to the field of civil engineering materials, and particularly relates to a warp-knitted hybrid fiber grid.
Background
The fiber warp knitting grid net is widely used in civil engineering due to excellent mechanical property and definite longitudinal and transverse stress directions, can be applied to reinforced cement concrete, and overcomes the problems of low tensile strength, poor ductility, poor impact resistance and the like of the concrete; the asphalt mixture is used for enhancing the surface layer of the asphalt mixture in road engineering, improving the stability of the pavement, delaying reflection cracks, improving the fatigue resistance and the like; it can also be used for reinforcing roadbed, embankment and side slope, etc. to raise stress stability. At present, carbon fiber warp-knitted grids and glass fiber warp-knitted grids are adopted more.
However, in practical engineering, fewer components are in a uniform stress state, the components may be in a large deformation state, and carbon fiber is a typical brittle material, so that although the strength is high and the elastic modulus is high, the deformation capability is poor, and the carbon fiber cannot fully play a role under uneven stress and large deformation; the glass fiber is low in price and good in ductility, but the strength and the modulus of the glass fiber are low, so that the rigidity and the bearing capacity are low when the glass fiber is used for reinforcing and reinforcing; basalt fibers are also gradually used for weaving fiber grids due to their excellent properties such as good mechanical properties, corrosion resistance, and high and low temperature resistance. The existing fiber warp knitting grid is basically formed by warp knitting one fiber, and the advantages of different fibers cannot be comprehensively exerted. The mixing of fibre is the effective way of solving single fiber grating defect, adopts behind the mixed fibre in the grid, when receiving external load, the weak fibre that the atress is big will take the lead to start the fracture, develops the higher fibre of ductility gradually along with the load increase, and stress transfer is more even, has reduced local stress concentration, makes the grid have certain ductility. At present, the fibers of different grid branches are mixed or the warp and weft directions are woven by adopting different fibers, but the warp knitting method of the two mixed fibers has limitations. The fiber between different grid branches is mixed, namely the high-modulus fiber grid branches and the low-modulus fiber grid branches are alternately woven to form the mixed fiber grid with the high-modulus fiber grid branches and the low-modulus fiber grid branches alternately at intervals. The other is that the warp and weft direction grating branches are woven by adopting different fiber blends, namely, high-modulus and high-strength fibers are adopted in the grating branches in the main stress direction (warp direction or weft direction), and low-modulus and low-strength fibers are adopted in the grating branches in the secondary stress direction (warp direction or weft direction).
Disclosure of Invention
The technical problem to be solved by the invention is to provide a hybrid fiber warp-knitted grid with high strength, high modulus, high ductility and coordinated deformation aiming at the defects of the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a mixed fibre warp knitting grid, by vertical mixed fibre grid branch and horizontal mixed fibre grid branch warp knitting form, its characterized in that: the longitudinal hybrid fiber grid branch is a first hybrid fiber grid branch formed by mixing a high-elasticity-modulus fiber bundle and a low-elasticity-modulus fiber bundle; the transverse hybrid fiber grid branch is a second hybrid fiber grid branch formed by mixing high-elasticity-modulus fiber bundles and low-elasticity-modulus fiber bundles.
The first hybrid fiber grid has a hybrid volume fraction of 15% -25% for high elastic modulus fibers; the hybrid volume fraction of the second hybrid fiber grid branch high-elastic modulus fiber is 15-25%
The high-elasticity modulus fiber bundle is a carbon fiber bundle; the low elastic modulus fiber bundle is a glass fiber bundle or a basalt fiber bundle.
The mixing ratio of the carbon fiber bundles and the glass fiber bundles is 25%: 75 percent; the mixing ratio of the carbon fiber bundle and the basalt fiber bundle is 18%: 82 percent.
The carbon fiber bundles in each grid are arranged in the middle, the glass fiber bundles are arranged on two sides, and the mixed fiber grids are adopted by the longitude and latitude grid branches.
The warp hybrid fiber grating is provided with braided wires, and the weft grating and the warp grating are positioned at the crossing points 5 of the warp and weft gratings by the braided wires, so that the deformation of grating meshes caused by the slippage of the warp and weft gratings is prevented.
The spacing of the grid meshes is controlled to be 25mm or 50 mm.
In order to ensure the high-elasticity-modulus fiber bundle and the low-elasticity-modulus fiber bundle to be stressed cooperatively, a pre-tension of 20% of the ultimate bearing capacity of the low-elasticity-modulus fiber bundle is applied in the weaving process, so that the stress hysteresis of the low-elasticity-modulus fiber bundle caused by low modulus is reduced.
The grid needs to be impregnated by the impregnating solution, the using amount of the impregnating solution needs to be determined according to the type of the impregnating solution, and the impregnating solution needs to be capable of protecting the surface layer of the grid.
The impregnation liquid is styrene-butadiene latex, styrene-acrylic emulsion, epoxy resin, vinyl resin or phenolic resin.
The hybrid fiber warp-knitted grid provided by the invention fully utilizes the advantages of high modulus and high strength of carbon fiber and high ductility of basalt fiber/glass fiber, high modulus fiber and low modulus fiber are compounded in a single grid, simultaneously, pretension is applied to low-elasticity modulus fiber bundles in the knitting process, the cooperative stress of the high-elasticity modulus fiber bundles and the high-elasticity modulus fiber bundles is ensured, and the prepared high/low-modulus fiber hybrid warp-knitted grid has the characteristics of high strength, good ductility, uniform stress, coordinated deformation, low price and the like. Meanwhile, the hybrid fiber grating is designed to be mixed in a single branch of a longitudinal grating and a latitudinal grating, so that each branch of the grating can play the advantages of high-modulus and low-modulus fibers, and the hybrid fiber grating has a larger breakthrough compared with the hybrid between different grating branches or the hybrid in different directions of the longitudinal direction and the latitudinal direction.
In the hybrid fiber warp-knitted grille, the vertical and horizontal single grilles, the high-elastic modulus fiber bundles and the low-elastic modulus fiber bundles are arranged in parallel, the hybrid volume fraction of high-modulus fibers is 15% -25%, and the vertical and horizontal hybrid fiber grilles are knitted into the hybrid fiber warp-knitted grille through warp knitting yarns. In order to ensure the cooperative stress of the high-elasticity-modulus fiber bundle and the low-elasticity-modulus fiber bundle, prestress is applied to the low-elasticity-modulus fiber bundle in the weaving process so as to reduce stress lag of the low-elasticity-modulus fiber bundle caused by low modulus.
The size range of the meshes of the hybrid fiber warp-knitted grating can be adjusted according to engineering requirements. The surface of the grating is coated according to the specific application, and the coating can be selected from a resin coating and an emulsion coating.
The resin coating material can be selected from epoxy resin, vinyl resin, phenolic resin and other resin materials, and the emulsion coating material can be styrene-butadiene latex, styrene-acrylic emulsion, acrylic emulsion and other emulsions.
The carbon fiber/glass fiber hybrid warp-knitted grid or the carbon fiber/basalt fiber hybrid grid can be selected according to specific use scenes by adopting the hybrid fiber warp-knitted grid of the technical scheme, and the thickness of fiber yarns in the grid and the size of grid meshes can also be selected and adjusted according to specific needs.
The warp-knitted hybrid fiber grid disclosed by the invention mainly has the following advantages:
1) the single grid adopts high-modulus fibers to improve the overall strength and rigidity of the grid, and simultaneously adopts low-modulus fibers with better deformability to improve the ductility of the grid, so that the prepared hybrid fiber warp-knitted grid has the characteristics of high strength, high modulus, good ductility, uniform stress and coordinated deformation.
2) The low-elastic modulus fiber bundles are prestressed in the warp knitting process of the hybrid warp knitting grid, so that the low-elastic modulus fiber bundles and the high-elastic modulus fiber bundles can be cooperatively stressed when the fiber grating is stressed, and stress lag of the low-elastic modulus fiber bundles is reduced.
3) The hybrid fiber warp-knitted grille is formed by alternately knitting longitudinal and transverse fibers, has a definite stress direction, can be widely used for reinforcing concrete, asphalt mixture, soil-based material and the like, and can obviously improve the strength, toughness, impact resistance, stability and the like of the material.
4) Has the advantages of good durability, bending property, impact resistance, high temperature resistance and the like.
5) The mixed warp-knitted grille can be widely applied to the fields of roof boards, decoration panels, disassembly-free templates, structure reinforcement, pavements, embankments, slope reinforcement, tunnel lining reinforcement and the like in buildings.
Drawings
FIG. 1 is a schematic drawing of the tensile curve of the hybrid fiber grid of the present invention;
FIG. 2 is a comparison of the hybrid fiber warp-knitted grating of the present invention with the conventional hybrid fiber grating, wherein a is the conventional hybrid fiber grating in different directions, b is the hybrid fiber grating between different grating branches, and c is the hybrid fiber grating in the same grating branch of the present invention;
FIG. 3 is a schematic structural view of a warp knitted hybrid fiber grid according to the present invention;
fig. 4 is a cross-section a-a in fig. 3.
Wherein: 1 is a high modulus fiber; 2 is a low modulus fiber; 3 is a single grid; 4 is a fiber warp knitting yarn; 5 is a longitude and latitude grating intersection point; 6 is a grid mesh; 7 is the cross section of the low elastic modulus fiber bundle; 8 is the cross section of the high elastic modulus fiber bundle; and 9 is the cross section of the warp single-branch grid.
Detailed Description
While specific embodiments of the present invention will be described in further detail with reference to fig. 3 and 4, it will be understood that these embodiments are merely illustrative of the present invention and are not intended to limit the scope of the invention, and that various equivalent modifications thereof will occur to those skilled in the art upon reading the present invention and fall within the scope of the appended claims.
The hybrid fiber warp-knitted grid is characterized in that a single grid is compounded into a hybrid fiber grid by utilizing high-modulus and high-strength carbon fibers and low-modulus and good-ductility glass fibers/basalt fibers based on a hybrid fiber design theory, and then the hybrid fiber grid with excellent comprehensive performance is obtained by knitting, so that the hybrid fiber grid can be exerted in engineering application, the defects of high strength, poor ductility or good ductility and low strength modulus of the single fiber warp-knitted grid are overcome, and the problem that the existing hybrid fiber grid is inconsistent in stress and deformation is solved.
The design of the hybrid fiber grating overcomes the problem of single performance of a single variety of fiber gratings, and the performance of the fiber product is improved and the ductility of the fiber product is designed through hybrid. The general principle of the hybrid design is that after one fiber is broken and damaged, the generated impact and the borne load can be smoothly borne by another fiber or fibers, and the mechanical property of the hybrid grid can be calculated according to the following formula:
σhy＝εm(E1V1+E2V2)
Ehy＝E1V1+E2V2
wherein E1Is a high modeElastic modulus of quantitative fiber, V1Is the hybrid volume fraction of high modulus fibers, E2Is the elastic modulus, V, of a low modulus fiber2Is the hybrid volume fraction, σ, of low modulus fibershyFor post-hybrid stress, EhyModulus after hybridization.
The mixing ratio of the high-modulus fiber and the low-modulus fiber is determined by the elastic modulus and the ultimate strain of the high-modulus fiber and the low-modulus fiber, compared with the low-modulus fiber, the modulus of the high-modulus fiber is high, the strain of the high-modulus fiber is small, and the high-modulus fiber is firstly stressed and reaches the ultimate strain epsilon under the load action1And breaks, at which the hybrid fiber grid is subjected to a maximum stress of its primary tensile strength σt1：
σt1＝ε1(E1V1+E2V2)
Glass fiber reaches ultimate strain epsilon2The strength of the hybrid grid is the second order tensile strength σ of the hybrid gridt2This can be represented by the following formula:
σt2＝E2V2ε2
the secondary tensile strength is the final breaking strength of the hybrid grid, so the proportion of the high-modulus hybrid fiber and the low-modulus hybrid fiber needs to be reasonably controlled to ensure that the secondary tensile strength sigmat2Greater than first order tensile strength sigmat1The advantages of different fibers can be fully exerted, grading and subsection damage occur, namely,
σt1＜σt2
the volume fraction of high modulus fiber is calculated to satisfy the following relationship:
Figure GDA0003515865320000051
the blended fiber grating can be continuously loaded by low-modulus and high-ductility fibers after the high-modulus fibers reach the ultimate strain, so that the ductility of the original high-modulus fiber grating is improved, and the modulus and the strength of the original low-modulus fiber grating are improved due to the fact that the high-modulus and high-strength fibers are blended in the original low-modulus fiber grating. The volume fraction of the obtained high-modulus carbon fiber mixture is about 15-20% when carbon fiber and glass fiber are mixed or carbon fiber and basalt fiber are mixed. Meanwhile, in order to ensure that the high-modulus fibers and the low-modulus fibers in the hybrid grid are uniformly stress-coordinated in the stress process, the high-modulus fibers are arranged in the middle of each grid, the low-modulus fibers are arranged on the sides of each grid, and pretension with the limit bearing capacity of 20% is applied to the low-modulus fibers.
Example 1
In this embodiment, as shown in fig. 3, a single lattice is formed by combining high modulus carbon fiber bundles 1 and low modulus glass fiber bundles 2. The high-modulus carbon fiber bundle 1 is a carbon fiber bundle, the elastic modulus of the carbon fiber is 230GPa, the elongation is 1.5%, the low-modulus glass fiber bundle 2 is a glass fiber bundle, the elastic modulus of the glass fiber is 75GPa, the elongation is 4.1%, the mixed volume fraction of the carbon fiber in each grid is 25%, the warp and weft single grids are warp-knitted to form a mixed fiber warp-knitted grid, and the mixed grid is impregnated with styrene-acrylic emulsion to improve the strength of the grid and protect the surface of the fiber. The elongation of the mixed grid is 2.9%, and compared with the elongation of the original carbon fiber grid of 1.5%, the ductility of the mixed grid is improved by 93%; compared with the strength of 1800MPa and the modulus of 75GPa of the original glass fiber grid, the strength of the hybrid grid is improved by 50 percent, the modulus is improved by 52 percent, and the performance of the original grid is fully improved. As shown in figures 3 and 4, the carbon fiber bundles in each grid are arranged in the middle, the glass fiber bundles are arranged on two sides, and the mixed fiber grids are adopted by the longitude and latitude grid branches. The weft grating branch and the warp grating branch can be positioned at the crossing point 5 of the warp and weft grating branch by the braided wire, so that the deformation of grating meshes caused by the slippage of the warp and weft grating branches is prevented. The criss-cross nodes form the high/low modulus fiber hybrid warp-knitted grid of the invention, and the pitch of the grid mesh can be controlled to be 25mm or 50 mm.
Example 2
In this embodiment, as shown in fig. 3, a single grid is formed by compounding a high-modulus carbon fiber bundle 1 and a low-modulus basalt fiber bundle 2, the high-modulus carbon fiber has an elastic modulus of 230GPa, an elongation of 1.5%, the low-modulus basalt fiber has an elastic modulus of 85GPa, an elongation of 3.1%, and a volume fraction of the carbon fiber is 15%, the warp and weft composite grid is warp knitted to form a hybrid grid, and the hybrid grid is impregnated with epoxy resin to improve the strength of the grid and protect the surface of the fiber. The elongation of the mixed grid is 2.7%, and compared with the elongation of the original carbon fiber grid of 1.5%, the ductility of the mixed grid is improved by 80%; the strength of the hybrid grid is 2900MPa, the modulus is 98GPa, compared with the strength 1900MPa and the modulus of the original basalt fiber grid which are 85GPa, the strength of the hybrid grid is improved by 53 percent, and the modulus is improved by 15 percent, so that the performance of the original grid is fully improved, and the advantages of different grids are exerted. As shown in figures 3 and 4, the carbon fiber bundles in each grid are arranged in the middle, the basalt fiber bundles are arranged on two sides, and the mixed fiber grids are adopted by the longitudinal grid and the latitudinal grid. The weft grating branch and the warp grating branch can be positioned at the crossing point 5 of the warp and weft grating branch by the braided wire, so that the deformation of grating meshes caused by the slippage of the warp and weft grating branches is prevented. These several criss-cross nodes constitute the high/low modulus fiber hybrid warp knitted grid of the present invention, and the pitch of the grid mesh can be controlled at 25mm or 50 mm.
Example 3
In this embodiment, as shown in fig. 3, a single grid is formed by compounding a high-modulus carbon fiber bundle 1 and a low-modulus basalt fiber bundle 2, the high-modulus carbon fiber has an elastic modulus of 230GPa, an elongation of 1.5%, the low-modulus basalt fiber has an elastic modulus of 85GPa, an elongation of 3.1%, and a volume fraction of the carbon fiber in each grid is 20%, the warp and weft composite grids are warp-knitted to form a hybrid grid, and the hybrid grid is impregnated with epoxy resin to improve the strength of the grid and protect the surface of the fiber. The elongation of the mixed grid is 2.5%, and compared with the elongation of the original carbon fiber grid of 1.5%, the ductility of the mixed grid is improved by 67%; the strength of the hybrid grid is 3100MPa, the modulus is 114GPa, compared with the strength 1900MPa and the modulus of the original basalt fiber grid which are 85GPa, the strength of the hybrid grid is improved by 63 percent, and the modulus is improved by 34 percent, so that the performance of the original grid is fully improved, and the advantages of different grids are exerted. As shown in figures 3 and 4, the carbon fiber bundles in each grid are arranged in the middle, the basalt fiber bundles are arranged on two sides, and the mixed fiber grids are adopted by the longitudinal grid and the latitudinal grid. The weft grating branch and the warp grating branch can be positioned at the crossing point 5 of the warp and weft grating branch by the braided wire, so that the deformation of grating meshes caused by the slippage of the warp and weft grating branches is prevented. These several criss-cross nodes constitute the high/low modulus fiber hybrid warp knitted grid of the present invention, and the pitch of the grid mesh can be controlled at 25mm or 50 mm.

Claims (7)

1. The utility model provides a miscellaneous fiber warp knitting grid, is by the warp knitting of vertical miscellaneous fiber grating branch and horizontal miscellaneous fiber grating branch, its characterized in that: the longitudinal hybrid fiber grid branch is a first hybrid fiber grid branch formed by mixing a high-elasticity-modulus fiber bundle and a low-elasticity-modulus fiber bundle; the transverse hybrid fiber grid branch is a second hybrid fiber grid branch formed by mixing a high-elasticity-modulus fiber bundle and a low-elasticity-modulus fiber bundle; the hybrid volume fraction of the first hybrid fiber grid branched high-elastic modulus fibers is 15% -25%; the hybrid volume fraction of the second hybrid fiber grid branched high-elasticity modulus fibers is 15% -25%; applying pre-tension of 20% of the ultimate bearing capacity to the low-elasticity-modulus fiber bundle in the weaving process so as to reduce the stress lag of the low-elasticity-modulus fiber bundle caused by low modulus; the high-elasticity modulus fiber bundle is a carbon fiber bundle; the low elastic modulus fiber bundle is a glass fiber bundle or a basalt fiber bundle.
2. The hybrid fiber warp knit grid according to claim 1, wherein: the mixing ratio of the carbon fiber bundles and the glass fiber bundles is 25%: 75 percent; the mixing proportion of the carbon fiber bundles and the basalt fiber bundles is 18%: 82 percent.
3. The hybrid fiber warp knit grid according to claim 1, wherein: the carbon fiber bundles are arranged in the middle of each grid, and the glass fiber bundles are arranged on two sides.
4. The hybrid fiber warp knit grid according to claim 1, wherein: the longitudinal hybrid fiber grid support is attached with a braided wire, and the braided wire positions the transverse grid support and the longitudinal grid support at the intersection of the longitudinal grid support and the transverse grid support, so that grid mesh deformation caused by slippage of the longitudinal grid support and the transverse grid support is prevented.
5. The hybrid fiber warp knit grid according to claim 1, wherein: the spacing of the grid meshes is controlled to be 25mm or 50 mm.
6. The hybrid fiber warp knit grid according to claim 1, wherein: the grid needs to be impregnated by the impregnating solution, the using amount of the impregnating solution needs to be determined according to the type of the impregnating solution, and the impregnating solution needs to be capable of protecting the surface layer of the grid.
7. The hybrid fiber warp knit grid according to claim 6, wherein: the impregnation liquid is styrene-butadiene latex, styrene-acrylic emulsion, epoxy resin, vinyl resin or phenolic resin.
CN202011567303.3A 2020-12-25 2020-12-25 Mixed fiber warp knitting grid Active CN113152201B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2417192Y (en) * 1999-09-29 2001-01-31 江苏九鼎集团股份有限公司 Earthworking grille made of machine weaved glass fiber
CN2903222Y (en) * 2006-03-24 2007-05-23 同济大学 Mixed fibre reinforced plastic bar
CN101666137A (en) * 2009-07-30 2010-03-10 华东交通大学 Hybrid fabric grid made from carbon fiber and basalt fiber
CN104175652A (en) * 2014-08-26 2014-12-03 常州慧运复合材料有限公司 Carbon fiber and glass fiber mixed type plane grating rib
CN105884304B (en) * 2016-04-15 2018-03-02 张家港英华材料科技有限公司 Fiber grid improved composition and composite grating

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