Preparation process of bending-tensile concrete

Abstract

The invention discloses a preparation process of anti-bending concrete, which comprises the following steps: preparing raw materials of cement, sand and aggregate; a fiber assembly is prepared, the fiber assembly comprises steel fibers and carbon fibers, and the steel fibers and the carbon fibers are mutually wound; putting the raw materials into a stirrer, adding water and an additive, and mixing and stirring; after stirring the raw materials, uniformly putting the raw materials into a fiber assembly for mixing and stirring; obtaining a concrete finished product; a fiber assembly is added in the concrete stirring and mixing process, steel fibers have good toughness and ductility, carbon fibers have excellent strength and rigidity, the structural strength and the bending and tensile resistance of concrete are effectively improved in the mode that the steel fibers and the carbon fibers are combined, and finally the performance of the concrete is improved; therefore, the use requirements of more occasions can be met, and the fiber assembly formed through spiral combination is better in combination degree and stability.

Description

Technical Field

[0001] The present invention relates to the field of concrete, and in particular to a preparation process for flexural-tensile concrete. Background Art

[0002] Concrete is one of the most important civil engineering materials in modern times. Concrete is a kind of artificial stone prepared by mixing cementitious materials, water, fine and coarse aggregates, and if necessary, adding chemical admixtures and mineral admixtures in a certain proportion, and then stirring, forming and curing.

[0003] Concrete is widely used in many building structures in life. Different usage scenarios have different performance requirements for concrete. For example, for occasions such as bridges and airport runways, there are relatively high requirements for both the strength and crack resistance of concrete. Otherwise, cracks are likely to appear during long-term use, resulting in insufficient durability. Summary of the Invention

[0004] In order to further improve the flexural-tensile performance, the present application provides a preparation process for flexural-tensile concrete.

[0005] The present application provides a preparation process for flexural-tensile concrete, adopting the following technical solutions: A preparation process for flexural-tensile concrete, characterized by comprising the following steps: S1, prepare raw materials including cement, sand and aggregates; S2, prepare a fiber assembly, the fiber assembly includes steel fibers and carbon fibers, and the steel fibers and carbon fibers are wound around each other; S3, put the raw materials into a mixer, and add water and additives for mixing and stirring; S4, after the raw materials are stirred, evenly put the fiber assembly into it for mixing and stirring; S5, obtain the concrete finished product.

[0006] Optionally, the mixer includes a mixing barrel, a mixing paddle is rotatably connected in the mixing barrel, a rotating frame is arranged in the mixing barrel, the rotating frame has support rods evenly distributed circumferentially, a material box for placing the fiber assembly is slidably connected to the support rods, and the bottom of the material box has a discharge port.

[0007] Optionally, the length direction of the support rod is along the radial direction of the mixing barrel, the support rod is inclined, the end of the support rod far from the center of the mixing barrel is higher than the other end, and a detachment prevention member is detachably connected to the end of the support rod.

[0008] Optionally, the detachment prevention member includes a retaining ring threadedly connected to the end of the support rod.

[0009] Optionally, a clutch assembly for linking the rotating frame and the stirring paddle is provided therebetween. The clutch assembly includes a transmission gear and a connecting cylinder. The transmission gear is fixed on the stirring paddle, and the connecting cylinder is fixed on the rotating frame. The inner wall of the connecting cylinder has a toothed ring for meshing with the transmission gear. A driving cylinder for driving the connecting cylinder to lift is provided on the stirring barrel.

[0010] Optionally, the material box includes a slider and a box body. The slider is slidably connected to the support rod, and the top of the box body is hoisted on the slider by a suspension rope.

[0011] Optionally, a grille is provided at the corresponding position of the box body at the discharge port. A plurality of through holes for the fiber assembly to pass through are formed on the grille.

[0012] Optionally, the grille is vertically slidably connected to the box body. A bottom plate for closing the discharge port is provided at the corresponding position of the box body at the discharge port. Two bottom plates are symmetrically arranged. One side of the bottom plate is connected with a rotating shaft and is rotatably connected to the box body by means of the rotating shaft. A driving motor for driving the bottom plate to turn is provided on the box body.

[0013] Optionally, the side of the bottom plate away from the rotating shaft is an arc surface.

[0014] Optionally, through grooves are formed in the side wall of the box body and are uniformly distributed. A cover plate is provided at the corresponding position of the box body at the through groove. The top of the cover plate is hinged to the box body, and the cover plate is used to cover the through groove.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. By adding a fiber assembly during the concrete mixing process, the steel fiber has good toughness and ductility, and the carbon fiber has excellent strength and stiffness. The combination of steel fiber and carbon fiber effectively improves the structural strength and flexural and tensile properties of the concrete, ultimately improving the performance of the concrete, so as to meet the usage needs of more occasions, and the fiber assembly formed by spiral combination has better bonding degree and stability; 2. A unique stirring barrel structure is adopted to stir the concrete. The fiber assembly is scattered into the stirring barrel through the material box. The material box can rotate synchronously with the stirring paddle. During the rotation, the fiber assembly is evenly discharged from the discharge port, and during the rotation, the material box moves radially under the action of centrifugal force, so that the fiber assembly can be scattered in each area of the stirring barrel, and the falling of the fiber assembly is more uniform; 3. The design of the bottom plate can close the discharge port of the material box. When it needs to be opened, the bottom plate can be driven to flip. During use, the bottom plate can also be driven to turn up to strike the grille, promoting the vibration and facilitating the dropping of the fiber assembly, reducing the situation where the fiber assembly accumulates and blocks at the grille, affecting the dropping efficiency. After turning down, the inclined bottom plate can also guide the falling direction of the material, realizing multiple functions of the bottom plate. Description of the Drawings

[0016] Figure 1 is a flowchart of an embodiment of the present application.

[0017] Figure 2 is a structural diagram of a mixer in an embodiment of the present application.

[0018] Figure 3 is a cross-sectional view of a box body in an embodiment of the present application.

[0019] Description of the Reference Numerals: 1. Stirring barrel; 2. Stirring paddle; 3. Stirring shaft; 4. Stirring blade; 5. Power source; 6. Support frame; 7. Discharge port; 8. Check valve; 9. Rotating frame; 10. Support rod; 11. Material box; 12. Discharge port; 13. Slide block; 14. Box body; 15. Suspension rope; 16. Retaining ring; 17. Transmission gear; 18. Connecting cylinder; 19. Tooth ring; 20. Mounting rod; 21. Driving cylinder; 22. Bottom plate; 23. Rotating shaft; 24. Grille; 25. Through hole; 26. Slide groove; 27. Through groove; 28. Cover plate. Detailed Embodiment

[0020] The following is a further detailed description of the present application in conjunction with the attached Figures 1-3 drawings.

[0021] A preparation process for flexural-tensile concrete, as Figure 1 shown, includes the following steps: S1. Prepare raw materials; The prepared raw materials include cement, sand and aggregates, and the cement is selected from portland cement or ordinary portland cement.

[0022] S2. Prepare the fiber assembly; The fiber assembly includes steel fibers and carbon fibers, and the steel fibers and carbon fibers are helically wound around each other to form an integral fiber assembly.

[0023] S3. Mix and stir the raw materials; Put the cement, sand and aggregates into a mixer, and add water and admixtures for mixing and stirring. The admixtures can be selected from water reducers or setting retarders, etc.

[0024] S4. Put in the fiber assembly and mix and stir; Put the fiber component into the blender and mix it again.

[0025] S5. Obtain the finished concrete.

[0026] As Figure 2 shown, the blender used in step S3 includes a mixing barrel 1 and mixing paddles 2. The mixing paddles 2 are rotatably connected inside the mixing barrel 1. The mixing paddles 2 include a mixing shaft 3 and a plurality of mixing blades 4. A power source 5 for driving its rotation is provided at the top of the mixing shaft 3. The power source 5 uses an electric motor. A support frame 6 for supporting the power source 5 is provided at the top of the mixing barrel 1. The bottom of the mixing barrel 1 has a discharge port 7, and a stop valve 8 for opening and closing it is provided at the discharge port 7.

[0027] As Figure 2 and Figure 3 shown, a rotating frame 9 is rotatably connected inside the mixing barrel 1. The rotating frame 9 has a plurality of radially extending support rods 10. The support rods 10 are evenly distributed around the circumference of the rotating frame 9, and the support rods 10 are inclined. The end of the support rod 10 away from the mixing shaft 3 is higher than the other end. A material box 11 is slidably connected to the support rod 10. The fiber component is placed in the material box 11. The bottom of the material box 11 has a discharge port 12, and the fiber component can be discharged through the discharge port 12. In addition, a clutch component for linking the two is provided between the rotating frame 9 and the mixing shaft 3. In this way, the synchronous linkage of the rotating frame 9 and the mixing shaft 3 can be realized by means of the clutch component. During the rotation of the material box 11, due to the action of centrifugal force, it will slide on the support rod 10, so that the material box 11 can drop the fiber component in more areas inside the mixing barrel 1, effectively improving the uniformity of the fiber component blanking. When the mixing shaft 3 and the rotating frame 9 do not rotate, the material box 11 will slide down to its original position under the action of its own gravity. In this way, the intermittent rotation cycle realizes the good blanking of the material box 11.

[0028] As Figure 2 and Figure 3 shown, the material box 11 includes a slider 13 and a box body 14. The slider 13 is slidably connected to the support rod 10. The top of the box body 14 is fixed to the slider 13 by a suspension rope 15 to realize the hoisting of the box body 14. The fiber component is stored in the box body 14. The box body 14 is hoisted. During the rotation of the rotating frame 9, the box body 14 will also swing accordingly, which is more convenient for the blanking of the fiber component and expands the blanking area; a anti-disengagement part is detachably connected to the end of the support rod 10. The anti-disengagement part includes a retaining ring 16 threadedly connected to the end of the support rod 10. With the help of the retaining ring 16, the anti-disengagement effect can be achieved, avoiding the situation that the slider 13 disengages from the support rod 10 during rotation. When it is necessary to disassemble the material box 11, just rotate the retaining ring 16 and remove it.

[0029] As Figure 2 and Figure 3As shown in the figure, the clutch assembly includes a transmission gear 17 and a connecting cylinder 18. The transmission gear 17 is fixed on the stirring shaft 3, and the connecting cylinder 18 is fixed on the rotating frame 9. The connecting cylinder 18 is provided with tooth grooves adapted to the transmission gear 17, and the inner wall of the tooth groove is provided with a tooth ring 19 for meshing with the transmission gear 17. The connecting cylinder 18 is located below the transmission gear 17. At the top of the mixing barrel 1, there is an installation rod 20 for installing the rotating frame 9, and a driving cylinder 21 for driving the connecting cylinder 18 to move vertically is arranged on the installation rod 20. The output end of the driving cylinder 21 abuts against the bottom wall of the connecting cylinder 18. In this way, by driving the connecting cylinder 18 to move upward by the driving cylinder 21, when the tooth ring 19 in the tooth groove meshes with the transmission gear 17, the circumferential linkage between the stirring shaft 3 and the rotating frame 9 can be realized at this time. When the output end of the driving cylinder 21 moves downward, the connecting cylinder 18 moves downward under its own gravity, so that the transmission gear 17 disengages from the tooth groove. At this time, the linkage state is disengaged, and the rotation of the stirring shaft 3 will not drive the rotating frame 9 to rotate, avoiding the phenomenon of material falling when the mixing paddle 2 stirs the raw materials and the material box 11 rotates accordingly.

[0030] As Figure 3 shown, the bottom of the box body 14 has a discharge port 12, and a bottom plate 22 for closing the discharge port 12 is arranged at the discharge port 12. In this embodiment, two bottom plates 22 are symmetrically arranged, and a rotating shaft 23 is fixed on the back side of the two bottom plates 22 and is rotatably connected to the box body 14 by means of the rotating shaft 23. The end of the bottom plate 22 away from the rotating shaft 23 is an arc surface, so that the bottom plate 22 can freely turn up or down. In addition, a driving motor for driving the rotating shaft 23 to rotate to realize the turning of the bottom plate 22 is arranged on the box body 14. The turning of the two bottom plates 22 is independently driven by the corresponding driving motors.

[0031] As Figure 3 shown, a grille 24 is arranged above the discharge port 12 corresponding to the bottom of the box body 14. The grille 24 is provided with a plurality of through holes 25 for the fiber assembly to pass through. By means of the arrangement of the grille 24, the situation that the fiber assembly in the box body 14 falls too fast can be avoided, and the falling efficiency can be slowed down so that the fiber assembly can fall into more areas in the mixing barrel 1; the grille 24 is vertically slidably connected to the box body 14, and a chute 26 for the grille 24 to move vertically is arranged in the box body 14. In actual use, when the bottom plate 22 is driven to turn up, it can knock on the grille 24 to generate a vibration effect, reducing the phenomenon that the fiber assembly blocks the through holes 25 and affects the material falling; when the bottom plate 22 is driven to turn down, the discharge port 12 is opened, and by controlling the different driving angles of the bottom plate 22, the size of the falling material opening can be adjusted. Among them, the bottom plate 22 can also play a role in guiding the material, and finally the direction and position of the falling material are adjusted to realize the multi-purpose of the bottom plate 22.

[0032] As Figure 3As shown in the figure, a plurality of horizontally penetrating through grooves 27 are formed in the side wall of the box body 14, and a cover plate 28 is provided at the notch of the box body 14 corresponding to the through groove 27. The cover plate 28 is used to close the through groove 27. The top of the cover plate 28 is hinged to the box body 14, and the bottom of the cover plate 28 is also an arc surface to avoid interference during flipping. In this way, when the rotating frame 9 does not rotate with the stirring shaft 3, the cover plate 28 can play a role in closing the through groove 27 to prevent the internal fiber assembly from falling through the through groove 27; when the rotating frame 9 is linked with the stirring shaft 3, while the box body 14 rotates, it will also swing, and the cover plate 28 will be opened periodically, so that part of the fiber assembly can be discharged through the through groove 27, and most of the fiber assembly falls through the opening of the bottom bottom plate 22, making the falling method of the fiber assembly more diversified and achieving a better falling effect.

[0033] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A process for preparing flexural tensile concrete, characterized in that: The following steps are involved: S1, prepare raw materials cement, sand and aggregate; S2, preparing a fiber assembly, the fiber assembly comprising steel fibers and carbon fibers, the steel fibers and the carbon fibers being entangled with each other; S3, putting the raw materials into a mixer, adding water and additives for mixing and stirring; S4, after the raw materials are stirred, the fiber components are evenly added for mixing; S5, obtaining a finished concrete product.

2. The process for preparing flexural tensile concrete according to claim 1, characterized in that: The mixer comprises a mixing barrel (1), a mixing paddle (2) is rotatably connected inside the mixing barrel (1), a rotating frame (9) is arranged inside the mixing barrel (1), the rotating frame (9) has support rods (10) uniformly distributed in the circumferential direction, a material box (11) for placing fiber components is slidably connected to the support rods (10), and the bottom of the material box (11) has a discharge port (12).

3. The process for preparing flexural tensile concrete according to claim 2, characterized in that: The length direction of the support rod (10) is along the radial direction of the mixing barrel (1), the support rod (10) is arranged obliquely, one end of the support rod (10) away from the center of the mixing barrel (1) is higher than the other end, and the end of the support rod (10) is detachably connected with an anti-dropping piece.

4. The process for preparing flexural tensile concrete according to claim 3, characterized in that: The anti-dropping member comprises a retaining ring (16) threadedly connected to the end of the support rod (10).

5. The process for preparing flexural tensile concrete according to claim 2, characterized in that: A clutch assembly for linking the rotating frame (9) and the stirring paddle (2) is provided between the rotating frame (9) and the stirring paddle (2), the clutch assembly comprising a transmission gear (17) and a connecting cylinder (18), the transmission gear (17) being fixed on the stirring paddle (2), the connecting cylinder (18) being fixed on the rotating frame (9), the inner wall of the connecting cylinder (18) having a gear ring (19) for meshing with the transmission gear (17), and a driving cylinder (21) for driving the connecting cylinder (18) to rise and fall is provided on the stirring barrel (1).

6. The process for preparing flexural tensile concrete according to claim 2, characterized in that: The material box (11) comprises a slider (13) and a box body (14); the slider (13) is slidably connected to the support rod (10); and the top of the box body (14) is suspended on the slider (13) via a suspension rope (15).

7. The process for preparing flexural tensile concrete according to claim 6, characterized in that: The box body (14) is provided with a grid (24) at a position corresponding to the discharge port (12), and a plurality of through holes (25) for the fiber components to pass through are formed on the grid (24).

8. The process for preparing flexural tensile concrete according to claim 7, characterized in that: The grille (24) is vertically slidably connected to the box body (14); a bottom plate (22) for sealing the box body (14) is provided at a position corresponding to the discharge port (12); two bottom plates (22) are symmetrically provided; a rotating shaft (23) is connected to one side of the bottom plate (22) and the bottom plate (22) is rotatably connected to the box body (14) by means of the rotating shaft (23); and a driving motor for driving the bottom plate (22) to flip is provided on the box body (14).

9. The process for preparing flexural tensile concrete according to claim 8, characterized in that: The side of the bottom plate (22) away from the rotating shaft (23) is an arc surface.

10. The process for preparing flexural tensile concrete according to claim 6, characterized in that: A through slot (27) is provided on the side wall of the box body (14), and a plurality of the through slots (27) are evenly distributed. A cover plate (28) is provided on the box body (14) at a position corresponding to the through slot (27), and the top of the cover plate (28) is hinged on the box body (14), and the cover plate (28) is used to cover the through slot (27).

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