CA2596911A1 - Fiber-reinforced plastic bar - Google Patents
Fiber-reinforced plastic bar Download PDFInfo
- Publication number
- CA2596911A1 CA2596911A1 CA 2596911 CA2596911A CA2596911A1 CA 2596911 A1 CA2596911 A1 CA 2596911A1 CA 2596911 CA2596911 CA 2596911 CA 2596911 A CA2596911 A CA 2596911A CA 2596911 A1 CA2596911 A1 CA 2596911A1
- Authority
- CA
- Canada
- Prior art keywords
- fiber
- reinforced plastics
- bar
- fiber reinforced
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Landscapes
- Moulding By Coating Moulds (AREA)
- Laminated Bodies (AREA)
Abstract
It is an object of the present invention to provided a fiber reinforced plastics (hereafter referred to as " FRP ") bar. The aim of the present invention is to improve the known FRP
bar. The said bar comprises a FRP core and a base resin in which the FRP bar is impregnated, and the peripheral surface of the core is coated axially with a cladding of bulked glass yarn reinforced plastics. Since the peripheral surface of core is coated axially with the cladding of bulked glass yarn reinforced plastics, the fiber reinforced plastics bar obtained in this invention has an effective roughness in the external surface of the core of the fiber reinforced plastics bar, which can improve the bond stress to concrete and therefore increase the lifetime of the reinforced concrete structures. The fiber reinforced plastics bar can be used to reinforce the concrete instead of steel rebar, and can be used widely in the buildings under the worse environment, such as marine structures, parking area and bridges where the antifreeze is used, and the like.
bar. The said bar comprises a FRP core and a base resin in which the FRP bar is impregnated, and the peripheral surface of the core is coated axially with a cladding of bulked glass yarn reinforced plastics. Since the peripheral surface of core is coated axially with the cladding of bulked glass yarn reinforced plastics, the fiber reinforced plastics bar obtained in this invention has an effective roughness in the external surface of the core of the fiber reinforced plastics bar, which can improve the bond stress to concrete and therefore increase the lifetime of the reinforced concrete structures. The fiber reinforced plastics bar can be used to reinforce the concrete instead of steel rebar, and can be used widely in the buildings under the worse environment, such as marine structures, parking area and bridges where the antifreeze is used, and the like.
Description
Fiber Reinforced Plastics Bar Field of the Invention The present invention relates to a fiber reinforced plastics (hereafter referred to as " FRP ") bar. The aim of the present invention is to improve the known FRP bar.
Background of the Invention Traditional FRP bar is obtained by drawing the core of fiber roving after the core is impregnated into the base resin. The bar has advantages such as lightweight and high tensile, corrosion resistant, low conductive, designability, the linear expansion thereof coefficient close to that of concrete, and the like. In recent years, the bar is used to reinforce the concrete instead of steel rebar, step-by-step, and can be used in the buildings under worse environment, such as marine structure, parking area and bridges where the antifreeze is used, and the like.
In these engineering, the bond properties of FRP bar to concrete or the bond stress of the FRP
bar to concrete is a significant design parameter of the concrete structures, and the design parameter has been paid more attention. Therefore, in order to increase the bond stress of the FRP bar to concrete, a sand grain lay is adhered to the surface of bar using a sand adhering machine before the base resin in which fiber reinforced plastics bar is impregnated is cured, to increase the roughness of the surface of bar. But, under a certain loading, the sand grain sometimes falls off from the bonding interface of the FRP bar, thereby resulting in the decreasing of bond stress of the FRP bar to concrete, and the bonding of the sand grain with bar is destructed accidentally, as a result, the lifetime of the reinforced concrete structures is reduced greatly.
Summary of the Invention In order to overcome the problem above, the present invention is to provide a fiber reinforced plastics bar with a novel structure, which can increase effectively the roughness of external surface of the core, increase the bond stress to concrete, and increase the lifetime of the reinforced concrete structures.
The object of the present invention is to provide a fiber reinforced plastics bar, which comprise a core of the fiber reinforced plastics and a base resin in which the fiber reinforced plastics bar is impregnated, and the peripheral surface of the core is coated axially with a cladding of bulked glass yarn reinforced plastics.
The fiber in the core (1) is selected one from a group of 1) carbon fiber; 2 alkali free glass fiber; 3) high strength glass fiber; 4) aramid fiber; and 5) combination of two or more of ] 5 them, and the content of the fiber in the core is in the range of 40 % by volume to 70 % by volume. The feature of each of these fiber selected is a high tensile strength, which can give the fiber reinforced plastics bar an advantageous mechanical strength, and satisfy the strength requirements during the use.
The fiber in the cladding is selected one from a group of 1) high strength glass fiber; 2) alkali free glass fiber bulked yarn; 3) combination of them, and the content of the fiber in the cladding is in the range of 30 % by volume to 60 % by volume.
The peripheral surface of the core is coated axially with the cladding of bulked glass yarn reinforced plastics, and the bulked yarn has a coarse surface, which increases the roughness of the surface of the fiber reinforced plastics bar, improves the bond stress to concrete and therefore increases the lifetime of the reinforced concrete structures.
Background of the Invention Traditional FRP bar is obtained by drawing the core of fiber roving after the core is impregnated into the base resin. The bar has advantages such as lightweight and high tensile, corrosion resistant, low conductive, designability, the linear expansion thereof coefficient close to that of concrete, and the like. In recent years, the bar is used to reinforce the concrete instead of steel rebar, step-by-step, and can be used in the buildings under worse environment, such as marine structure, parking area and bridges where the antifreeze is used, and the like.
In these engineering, the bond properties of FRP bar to concrete or the bond stress of the FRP
bar to concrete is a significant design parameter of the concrete structures, and the design parameter has been paid more attention. Therefore, in order to increase the bond stress of the FRP bar to concrete, a sand grain lay is adhered to the surface of bar using a sand adhering machine before the base resin in which fiber reinforced plastics bar is impregnated is cured, to increase the roughness of the surface of bar. But, under a certain loading, the sand grain sometimes falls off from the bonding interface of the FRP bar, thereby resulting in the decreasing of bond stress of the FRP bar to concrete, and the bonding of the sand grain with bar is destructed accidentally, as a result, the lifetime of the reinforced concrete structures is reduced greatly.
Summary of the Invention In order to overcome the problem above, the present invention is to provide a fiber reinforced plastics bar with a novel structure, which can increase effectively the roughness of external surface of the core, increase the bond stress to concrete, and increase the lifetime of the reinforced concrete structures.
The object of the present invention is to provide a fiber reinforced plastics bar, which comprise a core of the fiber reinforced plastics and a base resin in which the fiber reinforced plastics bar is impregnated, and the peripheral surface of the core is coated axially with a cladding of bulked glass yarn reinforced plastics.
The fiber in the core (1) is selected one from a group of 1) carbon fiber; 2 alkali free glass fiber; 3) high strength glass fiber; 4) aramid fiber; and 5) combination of two or more of ] 5 them, and the content of the fiber in the core is in the range of 40 % by volume to 70 % by volume. The feature of each of these fiber selected is a high tensile strength, which can give the fiber reinforced plastics bar an advantageous mechanical strength, and satisfy the strength requirements during the use.
The fiber in the cladding is selected one from a group of 1) high strength glass fiber; 2) alkali free glass fiber bulked yarn; 3) combination of them, and the content of the fiber in the cladding is in the range of 30 % by volume to 60 % by volume.
The peripheral surface of the core is coated axially with the cladding of bulked glass yarn reinforced plastics, and the bulked yarn has a coarse surface, which increases the roughness of the surface of the fiber reinforced plastics bar, improves the bond stress to concrete and therefore increases the lifetime of the reinforced concrete structures.
The base resin in which the fiber reinforced plastics bar is impregnated is a thermosetting resin, and may be selected one from a group of 1) epoxy resin; 2) epoxy vinyl ester resin; 3) unsaturated polyester resin.
The external surface of cladding of the bar also has a concave-convex and helical shape.
It is well known that the bulked glass yarn is a continuous glass fiber yarn, and can be expanded into fluffy glass fiber yarn under the effect of high-pressure draught. The fluffy glass fiber yarn not only has the general properties of general glass fiber, but also has the intensity of continuous glass fiber and fluffiness of short fiber. Since the peripheral surface of the core is coated axially with the cladding of bulked glass yarn reinforced plastics, the fiber reinforced plastics bar obtained in this invention has an effective roughness in the external surface of the core of the fiber reinforced plastics bar, which can improve the bond stress to concrete and therefore increase the lifetime of reinforced concrete structures.
Brief Description of Drawings Fig. 1 is a cross-section view showing the fiber reinforced plastics bar according to the present invention Fig. 2 is a schematic view of manufacturing process of the fiber reinforced plastics bar in the example according to the present invention.
Detail Description of the Invention Example 1: preparation of FRP bar with a diameter of 9.5 mm The fiber in the core 1 is an alkali free glass fiber twistless slubbings of 1200 TEX, the fiber in the cladding 2 is an alkali free glass fiber bulked yarn of 1200 TEX, and the base resin is an epoxy vinyl ester resin. A FRP bar is produced via special equipment (shown in figure 2) and the once forming process for pultruding and winding. The manufacturing process thereof is as follows:
1. The fiber yarn of the core 1 and the bulked yarn of the cladding 2 are arranged on the yarn stand 6;
2. The yarns are drawn from the yarn stand 6 to a yarn collector 5, respectively, and the bulked yarn of the cladding 2 is arranged on the peripheral of the fiber yarn of the core 1;
3. Under the effect of the dragger 7, the fiber yarn of the core 1 and the bulked yarn of the cladding 2 come into the steeping vat 8, to be dipped in the glue;
The external surface of cladding of the bar also has a concave-convex and helical shape.
It is well known that the bulked glass yarn is a continuous glass fiber yarn, and can be expanded into fluffy glass fiber yarn under the effect of high-pressure draught. The fluffy glass fiber yarn not only has the general properties of general glass fiber, but also has the intensity of continuous glass fiber and fluffiness of short fiber. Since the peripheral surface of the core is coated axially with the cladding of bulked glass yarn reinforced plastics, the fiber reinforced plastics bar obtained in this invention has an effective roughness in the external surface of the core of the fiber reinforced plastics bar, which can improve the bond stress to concrete and therefore increase the lifetime of reinforced concrete structures.
Brief Description of Drawings Fig. 1 is a cross-section view showing the fiber reinforced plastics bar according to the present invention Fig. 2 is a schematic view of manufacturing process of the fiber reinforced plastics bar in the example according to the present invention.
Detail Description of the Invention Example 1: preparation of FRP bar with a diameter of 9.5 mm The fiber in the core 1 is an alkali free glass fiber twistless slubbings of 1200 TEX, the fiber in the cladding 2 is an alkali free glass fiber bulked yarn of 1200 TEX, and the base resin is an epoxy vinyl ester resin. A FRP bar is produced via special equipment (shown in figure 2) and the once forming process for pultruding and winding. The manufacturing process thereof is as follows:
1. The fiber yarn of the core 1 and the bulked yarn of the cladding 2 are arranged on the yarn stand 6;
2. The yarns are drawn from the yarn stand 6 to a yarn collector 5, respectively, and the bulked yarn of the cladding 2 is arranged on the peripheral of the fiber yarn of the core 1;
3. Under the effect of the dragger 7, the fiber yarn of the core 1 and the bulked yarn of the cladding 2 come into the steeping vat 8, to be dipped in the glue;
4. After being dipped in the glue, the fiber yarn of the core 1 and the bulked yarn of the cladding 2 are drawn to the preforming mould 3, and are rearranged. The bulked yarns of the cladding 2 are arranged uniformly at the periphery of the center aperture 9 of the preforming mould 3, which has a diameter of 6.0 mm, and the fiber yarns of the core 1 are drawn into the center aperture 9 of the performing mould 3. The diameter of the center aperture 9 can control the content of the fiber of the core of about 40 % by volume (since the method for calculating the content of the fiber is well known for the skilled person in the art, the method will not be explained in detail here);
5. After being rearranged, both the fiber yarn of the core 1 and the bulked yarn of the cladding 2 come into a center aperture 10 of another preforming mould 4, which has a diameter of 9.5 mm, under the effect of the dragger 7, the diameter of the center aperture 10 of the preforming mould 4 can control the content of the fiber of the cladding of about 30 %
by volume (since the method for calculating the content of the fiber is well known for the skilled person in the art, and the method will not be explained in detail here);
by volume (since the method for calculating the content of the fiber is well known for the skilled person in the art, and the method will not be explained in detail here);
6. The fiber bundle after being dipped in the glue is subjected to surface-winding and helices distorting by twister 11, to form a helical and concave-convex shape, and at last is subjected to curing by passing the heating unit 12, to obtained the final product.
Test result of the bond stress to concrete ( C30 ):
Type of FRP Bar Diameter(mm) Bond Stress(MPa) Standard Method Common FRP Bar 9.5 9.11 FRP Bar(with Bulked Yarn) 9.5 10.93 Compared with common FRP bar, bond stress of FRP bar with bulked yarn to concrete (C30) increases by about 20% o Example 2: preparation of FRP bar with a diameter of 12.7 mm The Fiber of the core 1 in this example is an alkali free glass fiber twistless slubbings of 1200TEX and a carbon fiber yarn pf 800TEX, and the volume ratio of the alkali free glass fiber twistless slubbings to the carbon fiber yarn is 2:1. The fiber of the cladding 2 is high tensile bulked glass yarn of 1200TEX; the base resin is an unsaturated polyester resin. The FRP bar is produced via special equipment and the once forming process for pultruding and winding. The manufacturing process thereof is the same as that of example 1, except for that:
The diameter of the center aperture 9 of the preforming mould 3 is 9.0 mm; the diameter of the center aperture 9 can control the content of the fiber of the core I of about 70 % by volume; the diameter of the center aperture 10 of other preforming mould 4 is 12.7 mm, and the diameter of the center aperture 10 of the preforming mould can control the content of the fiber of the cladding of about 60 % by volume.
Test result of the bond stress to concrete ( C30 ):
Type of FRP Bar Diameter(mm) Bond Stress(MPa) Standard Method Common FRP Bar 9.5 9.11 FRP Bar(with Bulked Yarn) 9.5 10.93 Compared with common FRP bar, bond stress of FRP bar with bulked yarn to concrete (C30) increases by about 20% o Example 2: preparation of FRP bar with a diameter of 12.7 mm The Fiber of the core 1 in this example is an alkali free glass fiber twistless slubbings of 1200TEX and a carbon fiber yarn pf 800TEX, and the volume ratio of the alkali free glass fiber twistless slubbings to the carbon fiber yarn is 2:1. The fiber of the cladding 2 is high tensile bulked glass yarn of 1200TEX; the base resin is an unsaturated polyester resin. The FRP bar is produced via special equipment and the once forming process for pultruding and winding. The manufacturing process thereof is the same as that of example 1, except for that:
The diameter of the center aperture 9 of the preforming mould 3 is 9.0 mm; the diameter of the center aperture 9 can control the content of the fiber of the core I of about 70 % by volume; the diameter of the center aperture 10 of other preforming mould 4 is 12.7 mm, and the diameter of the center aperture 10 of the preforming mould can control the content of the fiber of the cladding of about 60 % by volume.
Claims (8)
1. A fiber reinforced plastics bar, comprising: a core (1) of fiber reinforced plastics and a base resin in which the fiber reinforced plastics bar is impregnated, characterized in that the peripheral surface of the core (1) is coated with a cladding (2) of bulked glass yarn reinforced plastics.
2. The fiber reinforced plastics bar according to claim 1, characterized in that the fiber in the core (1) is selected one from a group of 1) carbon fiber; 2 alkali free glass fiber; 3) high strength glass fiber; 4 aramid fiber; and 5) combination of two or more of them.
3. The fiber reinforced plastics bar according to claim 1 or 2, characterized in that the content of the fiber in the core (1) is in the range of 40 % by volume to 70 % by volume.
4. The fiber reinforced plastics bar according to claim 1, characterized in that the fiber in the cladding (2) is selected one from a group of 1) high strength glass fiber bulked yarn; 2) alkali free glass fiber bulked yarn; 5) combination of two of them.
5. The fiber reinforced plastics bar according to claim 1 or 4, characterized in that the content of the fiber in the cladding (2) is in the range of 30 % by volume to 60 % by volume.
6. The fiber reinforced plastics bar according to claim 1, characterized in that the base resin in which the fiber reinforced plastics bar is impregnated is a thermosetting resin.
7. The fiber reinforced plastics bar according to claim 1 or 6, characterized in that the thermosetting resin in which the fiber reinforced plastics bar is impregnated is selected one from a group of 1) epoxy resin; 2) epoxy vinyl ester resin; 3) unsaturated polyester resin.
8. The fiber reinforced plastics bar according to claim 1, characterized in that the external surface of cladding (2) of the bar has a concave-convex and helical shape.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620077436 CN2934433Y (en) | 2006-08-11 | 2006-08-11 | Fiber reinforced plastic reinforcement material |
| CNCN.200610041190.7 | 2006-08-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2596911A1 true CA2596911A1 (en) | 2008-02-11 |
Family
ID=38351122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2596911 Abandoned CA2596911A1 (en) | 2006-08-11 | 2007-08-10 | Fiber-reinforced plastic bar |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN2934433Y (en) |
| CA (1) | CA2596911A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060766A (en) * | 2014-06-16 | 2014-09-24 | 四川航天五源复合材料有限公司 | Steel-continuous-fiber composite bar for building |
| CN104060767A (en) * | 2014-06-19 | 2014-09-24 | 四川航天五源复合材料有限公司 | Method of industrially preparing steel-continuous-fiber composite bar |
| CN104060768A (en) * | 2014-06-19 | 2014-09-24 | 四川航天五源复合材料有限公司 | Industrial preparation method of steel-continuous-fiber composite bar with rib texture |
| CN107742558A (en) * | 2017-10-26 | 2018-02-27 | 江苏神马电力股份有限公司 | A kind of insulation mandrel and preparation method thereof |
| WO2018094521A1 (en) * | 2016-11-23 | 2018-05-31 | Pultrall Inc. | Method and system for producing a reinforcing bar, and resulting reinforcing bar |
| CN114347502A (en) * | 2022-01-05 | 2022-04-15 | 泰山玻璃纤维有限公司 | Carbon-glass mixed pulling plate based on bulked yarn modification and production process thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7993122B2 (en) * | 2007-09-07 | 2011-08-09 | Plasticomp, Llc | Device for improved reinforcing element with a continuous center core member with very long fiber reinforced thermoplastic wrapping |
-
2006
- 2006-08-11 CN CN 200620077436 patent/CN2934433Y/en not_active Expired - Fee Related
-
2007
- 2007-08-10 CA CA 2596911 patent/CA2596911A1/en not_active Abandoned
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060766A (en) * | 2014-06-16 | 2014-09-24 | 四川航天五源复合材料有限公司 | Steel-continuous-fiber composite bar for building |
| CN104060767A (en) * | 2014-06-19 | 2014-09-24 | 四川航天五源复合材料有限公司 | Method of industrially preparing steel-continuous-fiber composite bar |
| CN104060768A (en) * | 2014-06-19 | 2014-09-24 | 四川航天五源复合材料有限公司 | Industrial preparation method of steel-continuous-fiber composite bar with rib texture |
| WO2018094521A1 (en) * | 2016-11-23 | 2018-05-31 | Pultrall Inc. | Method and system for producing a reinforcing bar, and resulting reinforcing bar |
| EP3544796A4 (en) * | 2016-11-23 | 2020-07-22 | Pultrall Inc. | Method and system for producing a reinforcing bar, and resulting reinforcing bar |
| US11613086B2 (en) | 2016-11-23 | 2023-03-28 | Pultrall Inc. | Method and system for producing a reinforcing bar, and resulting reinforcing bar |
| US12011888B2 (en) | 2016-11-23 | 2024-06-18 | Pultrall Inc. | Method and system for producing a reinforcing bar, and resulting reinforcing bar |
| CN107742558A (en) * | 2017-10-26 | 2018-02-27 | 江苏神马电力股份有限公司 | A kind of insulation mandrel and preparation method thereof |
| CN114347502A (en) * | 2022-01-05 | 2022-04-15 | 泰山玻璃纤维有限公司 | Carbon-glass mixed pulling plate based on bulked yarn modification and production process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN2934433Y (en) | 2007-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2596911A1 (en) | Fiber-reinforced plastic bar | |
| CN1916327A (en) | Fiber wall with strong rib material of plastic | |
| CN104060944B (en) | Multilayer compound eccentric-wear-preventing continuous sucker rod and manufacturing device and method thereof | |
| US5727357A (en) | Composite reinforcement | |
| CN103225369B (en) | A kind of surface fibre composite reinforcement with helicitic texture and preparation method thereof | |
| CN101328993B (en) | Glass fiber reinforced plastic pressure pipe and preparing method thereof | |
| CN103206612B (en) | Light-metal-lined composite cylinder fully-wrapped with basalt fiber, and production process thereof | |
| CN108342995A (en) | The fiber cloth reinforced pillarwork of steel wire of overcoating ultra-high performance concrete | |
| KR101043809B1 (en) | Fiber reinforced polymer rod, manufacturing method thereof, and reinforcing method of concrete structure using the same | |
| WO2003037814A3 (en) | Compact, hybrid fiber reinforced rods for optical cable reinforcements and method for making same | |
| CN1936206A (en) | Steel-continuous-fiber composite-rib reinforced concrete earthquake-resisting structure | |
| CN102127986A (en) | Composite material transmission tower | |
| CN102345236A (en) | Wet-method production technology for multicore stranded fiber-reinforced core material | |
| CN104060767A (en) | Method of industrially preparing steel-continuous-fiber composite bar | |
| JPH05148780A (en) | Production of rope composed of fiber-reinforced composite material | |
| CN103132654B (en) | FRP reinforcement material end nut and manufacturing method thereof | |
| KR102112960B1 (en) | Frp-mesh for reinforcing concrete | |
| CN104060768A (en) | Industrial preparation method of steel-continuous-fiber composite bar with rib texture | |
| CN101139177B (en) | Extra-fine steel wire distributed fibre plastic bar and method for making same | |
| CN109838036A (en) | A kind of pipe-reinforced composite reinforcing of FRP ripple | |
| KR102060285B1 (en) | Method for manufacturing frp-mesh for reinforcing concrete | |
| WO1994011590A1 (en) | Fiber-reinforced plastic rod and method of manufacturing the same | |
| JP2008274667A (en) | Metal reinforcement bar and metal reinforcement bar forming device | |
| CN113039332B (en) | Composite steel bar | |
| CN2142912Y (en) | Fiber-reinforced draw-extrude plastic pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |