Anti-crack concrete and preparation process thereof

Abstract

The invention relates to the field of concrete processing, in particular to anti-crack concrete and a preparation process thereof. According to the anti-crack concrete preparation equipment, a plurality of first sliding rods and a plurality of second sliding rods are slidably connected to a lifting frame, the first sliding rods and the second sliding rods are alternately arranged, a plurality of gears are rotationally connected between every two adjacent first sliding rods and second sliding rods, and two bottom plates are arranged below the lifting frame. The concrete comprises the following components in percentage by mass: 10% of cement, 30% of sand, 40% of stones, 15% of water and 5% of knotted polypropylene fibers. The preparation process of the anti-crack concrete comprises the following steps: S1, driving the two-way telescopic rod to stretch back and forth; s2, a lead screw is rotated, and meanwhile a multi-section telescopic rod is driven to contract; s3, a hydraulic cylinder is driven to extend; s4, the first hydraulic rod is contracted; and S5, the second hydraulic rod is shrunk, meanwhile, sand, cement and water are added into the mixing box, and then a concrete stirring mechanism in the mixing box is driven to work.

Description

Technical Field

[0001] The invention relates to the field of concrete processing, and more particularly to a crack-resistant concrete and a preparation process thereof. Background Art

[0002] Crack-resistant concrete is a specially designed concrete that is designed to improve its crack resistance and reduce or prevent cracks during use. This type of concrete is usually used in projects that require high durability and structural integrity, such as large-volume concrete structures, basement walls, high-strength pavements, etc. The difference between existing crack-resistant concrete and ordinary concrete is that crack-resistant fiber materials are added to it. The added crack-resistant fiber materials are generally long strips, and the friction between the fibers and the inside of the concrete can be further improved. Summary of the invention

[0003] The invention provides a crack-resistant concrete and a preparation process thereof, and aims to increase the crack-resistant performance of the concrete by changing the shape of the crack-resistant fibers.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A crack-resistant concrete preparation device comprises a lifting frame, on which a plurality of first sliding bars and a plurality of second sliding bars are slidably connected, each first sliding bar and a plurality of second sliding bars are alternately arranged, a rubber strip is fixedly connected under each first sliding bar and a plurality of second sliding bars, a plurality of gears are rotatably connected between every two adjacent first sliding bars and a plurality of second sliding bars, each gear is meshed with the first sliding bars and the second sliding bars on both sides, each gear is rotatably connected to the lifting frame, two bottom plates are arranged under the lifting frame, and a plurality of longitudinal rubber strips are fixedly connected to each bottom plate.

[0006] The mass percentages of the components in the concrete are: 10% cement, 30% sand, 40% gravel, 15% water and 5% knotted polypropylene fiber.

[0007] A preparation process used in a crack-resistant concrete preparation device comprises the following steps;

[0008] S1: drives the bidirectional telescopic rod to reciprocate and extend;

[0009] S2: Rotate the lead screw to drive the multiple telescopic rods to retract at the same time;

[0010] S3: drives the hydraulic cylinder to extend;

[0011] S4: retract the first hydraulic rod;

[0012] S5: Contract the second hydraulic rod, add sand, cement and water into the mixing box at the same time, and then drive the concrete mixing mechanism in the mixing box to work. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of a crack-resistant concrete preparation device;

[0014] Figure 2 It is a structural schematic diagram of the bottom plate and the lifting plate;

[0015] Figure 3 It is a schematic diagram of the structure of the first sliding bar and the second sliding bar;

[0016] Figure 4 It is a structural schematic diagram of the hydraulic cylinder part;

[0017] Figure 5 It is a structural schematic diagram of the telescopic inclined plate part;

[0018] Figure 6 It is a structural schematic diagram of the roller part;

[0019] Figure 7 It is a structural schematic diagram of a bidirectional telescopic rod part;

[0020] Figure 8 It is a schematic diagram of the structure of the scattering claw part;

[0021] Fig. 9 It is a structural schematic diagram of the mixing box part;

[0022] Fig.10 The present invention is a flow chart of a process for preparing crack-resistant concrete.

[0023] In the figure:

[0024] Lifting frame 11; first sliding rod 101; second sliding rod 102; gear 103; first hydraulic rod 104;

[0025] Bottom plate 12; longitudinal rubber strip 201; convex teeth 202; second hydraulic rod 203;

[0026] Bracket 13; hydraulic cylinder 301; bidirectional telescopic rod 302; connecting rod 303; screw 304;

[0027] Telescopic inclined plate 14; blocking bar 401; multi-section telescopic rod 402; roller 403;

[0028] Barrel shell 15; threaded ring 501; threaded rod 502; breaking claw 503;

[0029] Mixing box 16. DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] like Figures 1 to 3 , in order to solve the problem of increasing the crack resistance of concrete.

[0033] A plurality of first slide bars 101 and second slide bars 102 are alternately arranged below the lifting frame 11, each of the first slide bars 101 and the second slide bars 102 is slidably connected to the lifting frame 11, and adhesive strips are bonded to the bottom of the first slide bars 101 and the second slide bars 102. A plurality of gears 103 are respectively arranged between adjacent first slide bars 101 and second slide bars 102, and each of the first slide bars 101 and the second slide bars 102 is provided with teeth. Each gear 103 meshes with teeth at corresponding positions on the first slide bars 101 and the second slide bars 102 on both sides. Two bottom plates 12 are arranged below the lifting frame 11, and a plurality of longitudinal adhesive strips 201 are bonded to each bottom plate 12.

[0034] The difference between crack-resistant concrete and traditional concrete mainly lies in the addition of fiber-reinforced materials. In the present invention, polypropylene fibers are firstly arranged longitudinally on the bottom plate 12, and then the lifting frame 11 is moved downward to drive the first slide bar 101 and the second slide bar 102 to move downward, and the polypropylene fiber material is pressed on the bottom plate 12, and then the multiple second slide bars 102 are driven to slide to one side relative to the lifting frame 11. At this time, the meshing driving gear 103 rotates, thereby driving the first slide bar 101 to move in the opposite direction relative to the second slide bar 102. Through the friction between the rubber strips under the first slide bar 101 and the second slide bar 102 and the longitudinal rubber strip 201 on the bottom plate 12, the two ends of the polypropylene fiber material below are twisted in opposite directions, thereby generating stress inside the material, thereby causing the material to be twisted and knotted. Compared with ordinary strip-shaped polypropylene fiber materials, multiple spherical knots are generated on the material, and then after adding the material to the concrete, the friction resistance after mixing is increased, so that the crack resistance of the concrete is improved.

[0035] like Figure 2 and Figure 3 , in order to solve the problem of the second sliding bar 102 moving.

[0036] Two first hydraulic rods 104 are fixed on the lifting frame 11 by means of a fixture. The movable ends of the two first hydraulic rods 104 are fixed with a fixing plate by means of screws. One end of the same side of the plurality of second sliding rods 102 is welded to the fixing plate.

[0037] The first hydraulic rod 104 is an electric telescopic rod, which is electrically driven to extend, thereby driving the fixed plate to move, and then driving multiple second sliding rods 102 to move synchronously, thereby engaging the driving gear 103 to rotate, and then engaging and driving the corresponding first sliding rod 101 to move, so that the adjacent first sliding rod 101 and the second sliding rod 102 move in opposite directions, thereby tying the polypropylene material.

[0038] like Figure 1 and Figure 4 , in order to solve the problem of filling above the bottom plate 12.

[0039] The fixed end of the hydraulic cylinder 301 is fixedly connected to the bracket 13 by means of screws, and the movable end of the hydraulic cylinder 301 is fixedly connected to the lifting frame 11 by means of screws.

[0040] When polypropylene fiber is added to the bottom plate 12, the hydraulic rod 301 is driven to contract and thus drive the lifting frame 11 to move partially upward. At this time, a gap is generated between the first slide bar 101, the second slide bar 102 and the bottom plate 12. Then, polypropylene fiber material is added thereto, and the hydraulic rod 301 is further driven to extend. Similarly, the first slide bar 101 and the second slide bar 102 are driven to press the polypropylene fiber material above the bottom plate 12. At the same time, the hydraulic rod 301 can increase the pressure between the first slide bar 101, the second slide bar 102 and the longitudinal rubber strip 201 to ensure the twisting effect on the polypropylene fiber material.

[0041] like Figures 5 to 7 , in order to solve the problem of adding polypropylene fiber material above the bottom plate 12.

[0042] The two filling mechanisms are respectively arranged on the left and right sides of the bracket 13, and each filling mechanism includes a telescopic inclined plate 14. The upper end of the telescopic inclined plate 14 is a fixed end, and the upper end is rotatably connected to the bracket 13. The lower end of the telescopic inclined plate 14 is a movable end, and the lower end contacts the bottom plate 12. A plurality of longitudinal blocking strips 401 are welded to the movable end of the telescopic inclined plate 14, the movable end of the multi-section telescopic rod 402 is fixedly connected to the movable end of the telescopic inclined plate 14, and the fixed end of the multi-section telescopic rod 402 is connected to the fixed end of the telescopic inclined plate 14.

[0043] When filling the top of the bottom plate 12, the polypropylene fiber is placed on the fixed end of the telescopic inclined plate 14, so that it slides down along the telescopic inclined plate 14 due to gravity, and the blocking strip 401 arranged below can block the horizontal material, so that the material sliding onto the bottom plate 12 is all along the direction of the longitudinal rubber strip 201. When the material slides along the telescopic inclined plate 14, the multi-section telescopic rod 402 is driven to contract at the same time, thereby pulling the telescopic inclined plate 401 to contract, and at the same time the moving end moves to both sides. Due to its own gravity, the moving end is always in contact with the bottom plate 12, so that the polypropylene fiber sliding along the telescopic inclined plate 14 is evenly distributed on the bottom plate 12.

[0044] like Figure 6 To solve the problem of excessive accumulation of polypropylene fibers on the blocking strip 401 causing blockage

[0045] The movable end of each telescopic inclined plate 14 is rotatably connected to a roller 403 , and a convex tooth 202 is fixedly connected to the bottom plate 12 , and the roller 403 contacts the corresponding convex tooth 202 .

[0046] When the moving end of the telescopic inclined plate 14 moves to both sides, it drives the roller 403 to roll on the convex tooth 202, so that the convex tooth 202 can lift it up, and then the telescopic inclined plate 14 falls again due to its own gravity, thereby achieving the purpose of vibrating the telescopic inclined plate 14 when it contracts, and then vibrating the horizontal polypropylene fiber material blocked by the blocking strip 401, avoiding excessive accumulation of the material blocking the addition of the bottom plate 12.

[0047] like Figures 5 to 7 , in order to solve the problem of adding polypropylene material to the fixed end of the telescopic inclined plate 14.

[0048] The two corresponding barrel shells 15 are movably connected, and the lead screw 304 is rotatably connected to the bracket 13. Each barrel shell 15 is threadedly driven with the lead screw 304, and the threaded driving directions of the two barrel shells 15 on the same side and the corresponding lead screw 304 are opposite.

[0049] Polypropylene material is arranged between the two barrel shells 15. When polypropylene material needs to be added, the driving screw 304 is rotated, and then the barrel shell 15 is driven by the thread to move. Since the thread driving directions between the two barrel shells 15 on the same side and the corresponding screws 304 are opposite, the movement directions of the two barrel shells 15 on the same side are opposite, and they can be driven open by the screw 304, so that the material therein falls above the telescopic inclined plate 14, and then slides along the telescopic inclined plate 14 to the bottom plate 12.

[0050] like Figure 8 , in order to solve the problem of the accumulation and entanglement of the polypropylene material in the barrel shell 15.

[0051] The fixed end of the two-way telescopic rod 302 is welded to the bracket 13, one end of each connecting rod 303 is welded to the corresponding two-way telescopic rod 302, the other end of each connecting rod 303 is rotatably connected to the threaded rod 502, each breaking claw 503 is welded to the corresponding threaded rod 502, and a threaded ring 501 is welded on the barrel shell 15, and a threaded transmission is formed between the threaded ring 501 and the corresponding threaded rod 502.

[0052] Since the polypropylene material is relatively rough, it will stick together when it accumulates in the barrel shell 15, making it inconvenient to process it, thereby driving the two-way telescopic rod 302 to reciprocate, thereby driving the connecting rod 303 to move back and forth, and then driving the threaded rod 502 to move back and forth. When the threaded rod 502 moves relative to the threaded ring 501, since the threaded ring 501 is fixed, the internal thread of the threaded ring 501 can drive the threaded rod 502 to rotate, thereby driving the breaking claw 503 to move and rotate at the same time, thereby breaking up the polypropylene material accumulated inside and preventing it from piling up and knotting.

[0053] like Fig. 9 , to solve the problem of concrete production.

[0054] The movable end of the second hydraulic rod 203 is rotatably connected to the corresponding bottom plate 12 , and the fixed end of the second hydraulic rod 203 is rotatably connected to the bracket 13 . The mixing box 16 is fixed below the bottom plate 12 , and a concrete mixing mechanism is disposed in the mixing box 16 .

[0055] When the polypropylene material is processed, the second hydraulic rod 203 is driven to contract, thereby driving the inner side of the bottom plate 12 to rotate outward, thereby causing the two bottom plates 12 to rotate, and then the polypropylene material on the bottom plate 12 falls into the mixing box 16. At the same time, sand, gravel, cement and water are added to the mixing box 16 to drive the internal concrete mixing mechanism to work and produce crack-resistant concrete.

[0056] 10% cement is the main cementing material of concrete, which is used to solidify sand, gravel and polypropylene fiber. 40% gravel provides the main skeleton for concrete. 30% sand is used to fill the gaps between coarse aggregates. 5% polypropylene fiber is the main material in anti-cracking concrete, which is used to increase the anti-cracking performance of concrete. The knotted polypropylene fiber can increase the contact effect with various materials in concrete, thereby increasing its anti-cracking performance and overall mechanical properties.

[0057] like Fig.10 , a preparation process used in a crack-resistant concrete preparation device comprises the following steps;

[0058] S1: driving the bidirectional telescopic rod 302 to reciprocate and telescope to break up the polypropylene fibers in the barrel shell 15;

[0059] S2: Rotate the lead screw 304 to open the barrel shell 15, and at the same time drive the multi-section telescopic rod 402 to contract, so that the polypropylene fiber slides along the telescopic inclined plate 14 to above the bottom plate 12;

[0060] S3: driving the hydraulic cylinder 301 to extend so that the first slide bar 101 and the second slide bar 102 press the polypropylene fiber onto the bottom plate 12;

[0061] S4: Contracting the first hydraulic rod 104 causes the first sliding rod 102 and the second sliding rod 102 to move in opposite directions relative to each other, thereby tying the polypropylene fibers;

[0062] S5: The second hydraulic rod 203 is retracted to make the processed polypropylene fibers fall into the mixing box 16, and sand, cement and water are added into the mixing box 16, and then the concrete mixing mechanism in the mixing box 16 is driven to work.

Claims

1. A crack-resistant concrete preparation device, characterized in that: The invention comprises a lifting frame (11), wherein a plurality of first sliding bars (101) and a plurality of second sliding bars (102) are slidably connected to the lifting frame (11), wherein each first sliding bar (101) and the second sliding bar (102) are alternately arranged, wherein a rubber strip is fixedly connected below each first sliding bar (101) and the second sliding bar (102), wherein a plurality of gears (103) are rotatably connected between each two adjacent first sliding bars (101) and the second sliding bars (102), wherein each gear (103) is meshed with the first sliding bars (101) and the second sliding bars (102) on both sides, wherein each gear (103) is rotatably connected to the lifting frame (11), and wherein two bottom plates (12) are arranged below the lifting frame (11), wherein each bottom plate (12) is fixedly connected with a plurality of longitudinal rubber strips (201).

2. The crack-resistant concrete preparation equipment according to claim 1, characterized in that: The plurality of second sliding rods (102) are all fixedly connected to a fixed plate, one end of a plurality of first hydraulic rods (104) is fixedly connected to the fixed plate, and the other end of each first hydraulic rod (104) is fixedly connected to the lifting frame (11).

3. The crack-resistant concrete preparation equipment according to claim 2, characterized in that: The movable end of the hydraulic cylinder (301) is fixedly connected to the upper part of the lifting frame (11), and the fixed end of the hydraulic cylinder (301) is fixedly connected to the bracket (13).

4. The crack-resistant concrete preparation equipment according to claim 3, characterized in that: The bracket (13) is provided with a packing mechanism on both the left and right sides, each packing mechanism comprises a telescopic inclined plate (14), the fixed end of each telescopic inclined plate (14) is rotatably connected to the bracket (13), the movable end of each telescopic inclined plate (14) is in contact with the bottom plate (12), the movable end of each telescopic inclined plate (14) is fixedly connected to a plurality of blocking bars (401), the movable end of each telescopic inclined plate (14) is fixedly connected to the movable end of a multi-section telescopic rod (402), and the fixed end of the multi-section telescopic rod (402) is fixedly connected to the fixed end of the telescopic inclined plate (14).

5. The crack-resistant concrete preparation equipment according to claim 4, characterized in that: The movable end of each telescopic inclined plate (14) is rotatably connected to a roller (403), each base plate (12) is provided with a convex tooth (202), and each roller (403) is in contact with a corresponding convex tooth (202).

6. The crack-resistant concrete preparation equipment according to claim 5, characterized in that: Each of the packing structures comprises two barrel shells (15), a lead screw (304) is rotatably connected to the bracket (13), and threaded transmission is performed between the lead screw (304) and the corresponding barrel shell (15).

7. The crack-resistant concrete preparation equipment according to claim 6, characterized in that: Each of the packing structures comprises a bidirectional telescopic rod (302) fixedly connected to a bracket (13); each movable end of each bidirectional telescopic rod (302) is fixedly connected to a connecting rod (303); each connecting rod (303) is rotatably connected to a threaded rod (502); each threaded rod (502) is fixedly connected to a breaking claw (503); each barrel shell (15) is fixedly connected to a threaded ring (501); and each threaded rod (502) is threadedly driven with a corresponding threaded ring (501).

8. The crack-resistant concrete preparation equipment according to claim 7, characterized in that: The inner side of each base plate (12) is rotatably connected to the movable ends of two second hydraulic rods (203), the fixed end of each second hydraulic rod (203) is rotatably connected to the bracket (13), and the outer side of each base plate (12) is rotatably connected to the bracket (13). A mixing box (16) is provided below the two base plates (12), and a concrete mixing mechanism is provided in the mixing box (16).

9. The concrete prepared by the crack-resistant concrete preparation equipment according to claim 8 is characterized in that: The mass percentages of the components in the concrete are: 10% cement, 30% sand, 40% gravel, 15% water and 5% knotted polypropylene fiber.

10. A preparation process using the crack-resistant concrete preparation equipment according to claim 8, characterized in that: The process comprises the following steps; S1: driving the bidirectional telescopic rod (302) to reciprocate and telescope; S2: rotating the lead screw (304) to simultaneously drive the multi-section telescopic rod (402) to retract; S3: driving the hydraulic cylinder (301) to extend; S4: retract the first hydraulic rod (104); S5: The second hydraulic rod (203) is retracted, and sand, cement and water are added into the mixing box (16) at the same time, and then the concrete mixing mechanism in the mixing box (16) is driven to work.

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