CN117888679A - Composite reinforcing steel bar and manufacturing method - Google Patents
Composite reinforcing steel bar and manufacturing method Download PDFInfo
- Publication number
- CN117888679A CN117888679A CN202311864844.6A CN202311864844A CN117888679A CN 117888679 A CN117888679 A CN 117888679A CN 202311864844 A CN202311864844 A CN 202311864844A CN 117888679 A CN117888679 A CN 117888679A
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- Prior art keywords
- steel bar
- slow
- bonding material
- composite
- psb
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- 239000002131 composite material Substances 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 229910001294 Reinforcing steel Inorganic materials 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 82
- 239000010959 steel Substances 0.000 claims abstract description 82
- 239000000463 material Substances 0.000 claims abstract description 59
- 230000001681 protective effect Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000005507 spraying Methods 0.000 claims description 9
- 238000000071 blow moulding Methods 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000004567 concrete Substances 0.000 description 5
- 238000004049 embossing Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 210000002435 tendon Anatomy 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 239000011513 prestressed concrete Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Landscapes
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The application relates to a composite steel bar and a manufacturing method thereof in the field of construction, comprising the following steps: PSB reinforcing steel bars; the slow-bonding material uniformly covers the surface of the PSB steel bar; and the protective pipe layer is sleeved outside the slow bonding material and is contacted with the slow bonding material. The composite steel bar has good corrosion resistance, the protection pipe of the composite steel bar has self-forming pore canal, the construction can be carried out on site by comparing with the pretensioning method, the procedures of reserving pore canal, grouting and sealing holes and the like are reduced by comparing with the post-tensioning method, the composite steel bar has high self-strength, large moment of inertia and large bending rigidity, is reliably manufactured into a steel bar cage, and can be used as a traditional steel bar and a prestressed steel bar by controlling the final setting time of a slow bonding material.
Description
Technical Field
The application relates to the field of buildings, in particular to a composite reinforcing steel bar and a manufacturing method thereof.
Background
The prestressed tendons in the prestressed concrete structure mainly adopt prestressed steel wires, steel strands and prestressed screw-thread steel bars. The prestressed concrete member is stretched by a pretensioning method and a post-tensioning method. The pretensioning method is mainly suitable for processing in factories because pretensioning conditions are not existed in a construction site because pretensioning is performed after pretensioning the prestressed tendons. The post-tensioning method is characterized in that a pore canal is reserved, the prestressed tendons are tensioned and then locked, the pore canal is sealed by grouting, the construction process is complex, and the efficiency is low. In corrosive environments and freeze thawing cycle environments, the prestressed tendons can be corroded, destroyed and even the structure fails. As for the slow-bonding steel strand, because the strength of the slow-bonding steel strand is often smaller than the diameter of the high section, the steel strand is small in rigidity, the steel strand can not form a cage when being made into a steel reinforcement cage, and can not be lifted, and the slow-bonding steel strand is provided with holes between steel wires, so that under the working condition that one section of the steel strand enters underground water, the underground water flows from the holes, and the durability is reduced.
Disclosure of Invention
The invention mainly aims to provide a composite steel bar and a manufacturing method thereof, and aims to solve at least one technical problem.
In order to achieve the above object, the present invention provides a composite reinforcing bar comprising: PSB reinforcing steel bars; the slow-bonding material uniformly covers the surface of the PSB steel bar; and the protective tube layer is sleeved outside the slow bonding material and is clung to the slow bonding material.
PSB reinforcing steel bar: refers to a deformed bar (finish-rolled deformed bar) for prestressed concrete.
In some embodiments of the invention, the outer side of the protective tube layer is threaded.
In some embodiments of the invention, the threads include, but are not limited to, one of trapezoidal threads, rectangular threads, triangular threads.
In some embodiments of the present invention, the material of the protective tube layer is a polymer composite material or a metal material.
In some embodiments of the invention, the initial viscosity of the slow-binding material is 1.0 x 10 4～1.0*103 mPa-s.
In some embodiments of the present invention, the slow-bonding material has a flexural strength of 20MPa or more, a compressive strength of 50MPa or more, and a tensile shear strength of 10MPa or more after solidification.
According to another aspect of the present invention, there is provided a method for manufacturing the composite steel bar, including the steps of:
feeding PSB steel bars into the positioning plate by using a motor;
centering the PSB steel bars, and ensuring that the PSB steel bars are coaxial on a production line and are not bent;
Adjusting the spraying pressure of the spraying equipment according to the viscosity of the slow-bonding material, so that the slow-bonding material is uniformly sprayed on the surface of the PSB steel bar with a set thickness;
and spraying the material of the protective tube layer on the surface of the slow bonding material by using a blow molding device to form the protective tube layer.
In some embodiments of the invention, the spraying device is provided with a temperature controller, and the temperature of the slow-bonding material is controlled to be 20-25 ℃.
Compared with the prior art, the invention achieves the following technical effects:
1. After the slow-bonding material is solidified, the composite steel bar can be solidified with the protective pipe layer and the concrete outside the pipe through the slow-bonding material, so that the elongation of the PSB steel bar is not reduced even if the anchor head is loosened, and the prestress is hardly lost.
2. The material of the protective pipe layer and the buffer bonding material layer has good corrosion resistance, so that the composite steel bar has good corrosion resistance.
3. The protection pipe of the invention can be used for self-forming a hole channel, and can be used for on-site construction compared with a pretensioning method, and the procedures of reserving a hole channel, grouting, sealing holes and the like are reduced compared with a post-tensioning method.
4. The composite steel bar has high self strength, large moment of inertia and large rigidity, and the bending moment generated by the dead weight of the steel bar cage and the lifting point can not cause the steel bar cage to excessively deform in the lifting and lifting processes after the steel bar cage is manufactured, so that the bending rigidity of the composite steel bar is reliably manufactured into the steel bar cage.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic view of the overall structure of a composite reinforcement bar according to an embodiment of the present application.
The reference numerals in the drawings are as follows:
1. PSB reinforcing steel bars; 2. a protective tube layer; 3. and (5) a slow-bonding material layer.
Detailed Description
It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application as detailed in the accompanying claims.
In the description of the present application, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present application, unless otherwise indicated, "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
The following describes a composite steel bar and a manufacturing method according to an embodiment of the present application with reference to the accompanying drawings.
The embodiment of the application discloses a composite steel bar. As shown in fig. 1, the composite steel bar comprises a PSB steel bar 1, a protective pipe layer 2 and a slow bonding material; wherein, the slow bonding material uniformly covers the surface of the PSB steel bar 1 to form a slow bonding material layer 3; the protective tube layer 2 is sleeved outside the slow bonding material, and the protective tube layer 2 is tightly attached to the slow bonding material.
The setting time of the slow-bonding material is controllable, the slow-bonding material is a plastic material before setting, fills the gap between the PSB steel bar 1 and the protective pipe layer 2, has certain viscosity, and can not flow too fast under the action of gravity after being smeared on the surface of the PSB steel bar 1; the slow-bonding material becomes solid after solidification and has high compressive strength, shear strength and bonding strength.
By using the composite steel bar in the technical scheme, the composite steel bar is stretched before the slow-bonding material is solidified, and the elongation of the PSB steel bar 1 can move in the protection pipe because the slow-bonding material is a plastic material at the moment, and the PSB steel bar 1 and the concrete have no bonding strength; after the slow-bonding material is solidified, the composite steel bar and the concrete have bonding strength and form a whole, the pre-pressure applied by tensioning can be transferred to the through length range of the PSB steel bar 1 from the tensioning locking end, and the pre-stress loss caused by loosening of the anchor head is greatly reduced, namely the PSB steel bar 1 is converted into full-length bonding from pressure type.
Furthermore, the slow-bonding material and the material of the protective tube layer 2 have corrosion resistance, so that the composite steel bar has good corrosion resistance, and the steel bar can be effectively protected.
Further, the protection pipe layer 2 is self-formed, construction can be carried out on site by a comparison pretensioning method, and procedures of reserving the hole, grouting, sealing holes and the like are reduced by a comparison post-tensioning method.
Further, the composite steel bar formed by the PSB steel bar 1 has high self-strength, large moment of inertia and large bending rigidity, and the composite steel bar can be reliably manufactured into a steel bar cage.
Flexural rigidity=ei, E is the steel bar elastic modulus, i=pi D 3/64 is the steel bar cross-sectional moment of inertia proportional to the cubic of the steel bar diameter.
Further, the final setting time of the slow-bonding material is controllable, the final setting time is controlled to be before delivery, the composite steel bar can be used as a traditional steel bar, and the composite steel bar can be used as a prestress steel bar after the final setting time is controlled to be applied.
In some embodiments of the invention, the outer side of the protective tube layer 2 is threaded; after the concrete material outside the protective tube layer 2 is solidified, the bonding strength of the composite steel bar and the concrete can be increased by increasing the mechanical biting force through the screw thread.
Further, the threads include, but are not limited to, trapezoidal threads, rectangular threads, triangular threads, and the like, without limitation.
In some embodiments of the present invention, the material of the protective tube layer 2 is a polymer composite material or a metal material.
Further, the polymer synthetic materials include, but are not limited to, PE (polyethylene), PVC (polyvinyl chloride), etc.; metallic materials include, but are not limited to, Q235 steel, 45# steel, and the like.
In some embodiments of the invention, the initial viscosity of the slow-binding material is 1.0 x 10 4～1.0*103 mPa-s.
Further, the flexural strength of the slow-bonding material after solidification is more than or equal to 20MPa, the compressive strength is more than or equal to 50MPa, and the tensile shear strength is more than or equal to 10MPa.
The invention also provides a manufacturing method for manufacturing the composite steel bar, wherein the composite steel bar is manufactured by using a composite steel bar processing production line, and the composite steel bar processing production line sequentially comprises a steel bar feeding device, a positioning plate, a gel coating device, a protective tube blow molding device, an embossing device and a water cooling device from front to back; the manufacturing method comprises the following steps:
(1) Starting the bar feeding device, and feeding the PSB steel bars 1 into the positioning plate by using the motor.
(2) At the locating plate, the PSB reinforcing steel bars 1 are centered, so that the PSB reinforcing steel bars 1 are concentric on the production line and are not bent.
(3) PSB reinforcing steel bar 1 enters the gelatinizing coating device from the locating plate, PSB reinforcing steel bar 1 passes through the slow-bonding agent glue cavity, and slow-bonding materials can be uniformly smeared on the surface.
Further, the temperature controller is arranged in the gel coating device, and the temperature of the slow-bonding material layer 3 is controlled to be 20-25 ℃, so that the slow-bonding material is prevented from being cured too quickly due to the too high temperature, or the slow-bonding material is prevented from being coated unevenly due to the high viscosity due to the too low temperature.
(4) The PSB reinforcing steel bar 1 and the slow bonding material continuously enter a protective tube blow molding device from a gel coating device, and the blow molding device is used for spraying the material of the protective tube layer 2 on the surface of the slow bonding material layer 3 to initially form the protective tube layer 2.
(5) PSB reinforcing bar 1 with slow bonding material and protection tube layer 2 continue to get into the embossing apparatus from protection tube blowing device, the embossing apparatus is two steel turntables of required external texture, the pressure of just carousel can be adjusted, extrudes the helicitic texture at protection tube layer 2 surface through the embossing apparatus, obtains fashioned composite reinforcement.
(6) The composite steel bar continuously enters a cooling device from the embossing device, and is cooled by adopting a cooling water tank mode, so that the protective tube layer 2 is rapidly shaped; the cooling device comprises a cooling water tank, a water tank and a water pump, wherein water is circulated in the water tank and the cooling water tank by the water pump, and the water temperature is controlled by controlling the water pumping speed of the water pump.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (8)
1. A composite rebar comprising:
PSB reinforcing steel bars;
The slow-bonding material uniformly covers the surface of the PSB steel bar;
And the protective tube layer is sleeved outside the slow bonding material and is clung to the slow bonding material.
2. The composite steel bar according to claim 1, wherein the outer side of the protective tube layer has threads.
3. The composite rebar of claim 2, wherein the threads include, but are not limited to, one of trapezoidal threads, rectangular threads, triangular threads.
4. A composite steel bar according to any one of claims 1 to 3, wherein the material of the protective tube layer is a polymer composite material or a metal material.
5. The composite reinforcement according to claim 1, wherein the initial viscosity of the slow-binding material is 1.0 x 10 4～1.0*103 mPa-s.
6. The composite steel bar according to claim 5, wherein the flexural strength of the slow-bonding material after solidification is 20MPa or more, the compressive strength is 50MPa or more, and the tensile shear strength is 10MPa or more.
7. A method of making a composite steel bar according to any one of claims 1 to 6, comprising the steps of:
feeding PSB steel bars into the positioning plate by using a motor;
centering the PSB steel bars, and ensuring that the PSB steel bars are coaxial on a production line and are not bent;
Adjusting the spraying pressure of the spraying equipment according to the viscosity of the slow-bonding material, so that the slow-bonding material is uniformly sprayed on the surface of the PSB steel bar with a set thickness;
and spraying the material of the protective tube layer on the surface of the slow bonding material by using a blow molding device to form the protective tube layer.
8. The method of claim 7, wherein the spraying equipment has a temperature controller, and the temperature of the slow-bonding material is controlled to be 20-25 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311864844.6A CN117888679A (en) | 2023-12-29 | 2023-12-29 | Composite reinforcing steel bar and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311864844.6A CN117888679A (en) | 2023-12-29 | 2023-12-29 | Composite reinforcing steel bar and manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117888679A true CN117888679A (en) | 2024-04-16 |
Family
ID=90640345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311864844.6A Pending CN117888679A (en) | 2023-12-29 | 2023-12-29 | Composite reinforcing steel bar and manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117888679A (en) |
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2023
- 2023-12-29 CN CN202311864844.6A patent/CN117888679A/en active Pending
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