Graphene concrete precast slab and preparation method thereof

Abstract

The application relates to the technical field of concrete prefabricated slabs, in particular to a graphene concrete prefabricated slab and a preparation method thereof. The graphene concrete prefabricated slab comprises two oppositely arranged concrete prefabricated slabs, the concrete prefabricated slabs are uniformly provided with frameworks, supporting frames are fixedly connected between the two concrete prefabricated slabs, the two concrete prefabricated slabs are spliced and fixed into an integrated whole, a plurality of flow channels are arranged on opposite surfaces of the concrete prefabricated slabs, the flow channels on one concrete prefabricated slab correspond to the flow channels on the other concrete prefabricated slab, the flow channels extend from the central parts of the concrete prefabricated slabs to the side edge directions of the concrete prefabricated slabs, and the number of the flow channels close to the side edges of the concrete prefabricated slabs is greater than that of the flow channels close to the centers of the concrete prefabricated slabs. The application further provides a feeding device for the graphene concrete prefabricated slab and a preparation method for the graphene concrete prefabricated slab.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete prefabricated slabs, and particularly relates to a graphene concrete prefabricated slab and a preparation method thereof. BACKGROUND

[0002] Concrete prefabricated slabs are commonly used in the construction industry and have the advantages of fast construction speed, high strength and good durability. At present, people add graphene or graphene oxide into concrete prefabricated slabs in order to improve the durability of the concrete prefabricated slabs. Compared with the hardened body of pure cement paste, the concrete prefabricated slab containing graphene has higher tensile strength and bending strength, and the compression resistance and impact resistance are also improved to some extent, thereby improving the use demand of people on the concrete prefabricated slabs. However, the installation of the concrete prefabricated slabs needs to be connected, and the connection part is easily impacted by a combination of various external forces, thereby causing unstable connection or cracking and damage of the connection part, and affecting the use safety and stability.

[0003] To solve the above technical problems, Chinese patent CN110344534A discloses a graphene concrete structure, which comprises a first graphene concrete block, the first graphene concrete block is provided with a second graphene concrete block on one side, the second graphene concrete block is provided with a second connecting column on one side, the outer side of the second connecting column on the outer surface of the one side of the first graphene concrete block is provided with a connecting groove, the inside of the first graphene concrete block is provided with a first reinforcing frame, the inner side of the middle of the first reinforcing frame is provided with a first reinforcing plate, the lower end of the first reinforcing frame is provided with a first longitudinal reinforcing column, and the lower end of the first longitudinal reinforcing column in the inside of the first graphene concrete block is provided with a second reinforcing frame. The above patent improves the stability and impact resistance after splicing, but a large amount of graphene needs to be mixed, which is easy to cause waste.

[0004] Therefore, the present application provides a graphene concrete prefabricated slab and a preparation method thereof, graphene or graphene oxide is added to the connection part of the concrete prefabricated slab to obtain the graphene concrete prefabricated slab, so as to ensure the stability and strength of the connection part and improve the use stability and service life of the graphene concrete prefabricated slab, which is needed by those skilled in the art. SUMMARY

[0005] The present application aims to provide a graphene concrete prefabricated slab and a preparation method thereof, so as to solve the technical problems of low strength of the connection part of the prefabricated slab in the prior art, unstable connection, cracking and damage of the connection part.

[0006] The technical scheme adopted by the present application to solve its technical problems is: a graphene concrete precast slab, comprising two oppositely arranged concrete precast slabs, the concrete precast slab is uniformly provided with a framework, a support frame is fixedly connected between the two concrete precast slabs, the two concrete precast slabs are spliced and fixed as a whole, a plurality of flow channels are arranged on the opposite surfaces of the concrete precast slab, the flow channels on one concrete precast slab correspond to the flow channels on the other concrete precast slab, the flow channels extend from the central part of the concrete precast slab towards the side edge direction of the concrete precast slab, and the number of flow channels near the side edge of the concrete precast slab is greater than the number of flow channels near the center of the concrete precast slab.

[0007] Further, the flow channel comprises a feeding channel, a distribution channel, a dispensing channel and a containing channel; the feeding channel is symmetrically arranged on both sides of the support frame, the feeding channel is arranged in parallel with respect to the axis of the support frame, and the feeding channel extends downward from the top surface of the concrete precast slab to the center.

[0008] Further, the distribution channel is arranged vertically with respect to the axis of the support frame, the distribution channel is connected to the feeding channel, first and second shunt channels are symmetrically arranged on both sides of the distribution channel, and triangular protrusions are arranged near the first and second shunt channels in the distribution channel.

[0009] Further, the dispensing channel is arranged vertically with respect to the axis of the support frame, and the dispensing channel is provided with a plurality of channels respectively connected to the distribution channel, the first shunt channel and the second shunt channel.

[0010] Further, the containing channel is arranged vertically with respect to the axis of the support frame, the containing channel is connected to the dispensing channel, a plurality of containing holes are formed in the opposite two side walls of the containing channel, part of the containing holes are straight holes, and part of the containing holes are inclined holes.

[0011] A feeding device for a graphene concrete precast slab, comprising a feeding body, the feeding body is arranged on two concrete precast slabs and connected to the flow channels, and a feeding connector is arranged on the top of the feeding body, and the feeding connector is connected to the graphene concrete.

[0012] Further, the feeding body is provided with a first feeding pipe and a second feeding pipe, the first feeding pipe is provided with two, the first feeding pipe extends inward from the bottom surface of the feeding body, and one first feeding pipe is opposite to one feeding channel; the second feeding pipe extends inward from the top surface of the feeding body, the second feeding pipe is connected to the first feeding pipe, and the feeding connector is installed in the first feeding pipe.

[0013] Further, the feeding body is provided with a separation cavity, a first feeding pipeline is communicated with the bottom wall of the separation cavity, and a second feeding pipeline is communicated with the top wall of the separation cavity; the separation ring is rotatably arranged on the bottom wall of the separation cavity, the top surface of the separation ring abuts against the top wall of the separation cavity, and the bottom surface of the separation ring faces the first feeding pipeline.

[0014] Further, the separation ring is provided with a notch, the notch is communicated with the first feeding pipeline and the second feeding pipeline, the inner ring cavity is coaxially arranged in the separation ring, and the counterweight is fixedly connected to the inner ring cavity and close to the notch.

[0015] A preparation method of a graphene concrete precast slab, characterized in that the method comprises the following steps: step one, placing a framework in a mold, the mold being provided with a flow channel on one side wall, pouring concrete into the mold, and completing the production of one concrete precast slab; step two, placing a support frame in a mounting groove on one concrete precast slab, combining two concrete precast slabs, and making the flow channels oppositely arranged and aligned with each other, and then using a bolt or a screw or other fasteners to splice and fix the two concrete precast slabs into one, thereby obtaining a precast slab; and step three, clamping the precast slab by using a clamp, rotating the precast slab by 90° so that the axis of the support frame is parallel to the horizontal plane, installing a feeding body at one end of the support frame, and making the feeding body communicated with the flow channel, and then high-pressure pouring graphene concrete into the flow channel from the feeding body, and after the addition is completed, rotating the clamp and continuing to high-pressure pour graphene concrete, thereby completing the production of a graphene concrete precast slab.

[0016] The graphene concrete precast slab has the advantages that: the graphene concrete can make cement hydration products form flower-shaped crystals and increase the compactness of the internal structure, the accommodating channel and the accommodating hole are additionally arranged at the joint part of the concrete precast slab, the number of the flow channels on the side edge of the concrete precast slab is large, the strength of the joint part of the concrete precast slab is improved, the use stability is ensured, the amount of the graphene concrete at the middle part of the concrete precast slab is reduced, the production cost is effectively reduced, and resource waste is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a perspective view of a graphene concrete precast slab in the present application.

[0018] Figure 2 FIG. 2 is an exploded view of a graphene concrete precast slab in the present application.

[0019] Figure 3 FIG. 3 is a top view of a graphene concrete precast slab in the present application.

[0020] Figure 4 is Figure 3 a sectional view along A-A in

[0021] Figure 5 is Figure 4 a partial enlarged view of the A part in

[0022] Figure 6 is an exploded view of the feeding body in the present application.

[0023] Figure 7 is an isometric side sectional view of the feeding body in the present application.

[0024] The reference signs of the components in the drawings are as follows: 10, concrete precast slab; 11, skeleton; 12, support frame; 20, feeding body; 21, feeding joint; 22, mounting seat; 23, first feeding pipeline; 24, second feeding pipeline; 25, separation ring; 251, notch; 252, inner ring cavity; 253, counterweight; 27, mating mounting hole; 28, separation cavity; 30, flow channel; 31, feeding channel; 32, distribution channel; 33, triangular protrusion; 34, mounting groove; 35, first distribution channel; 36, second distribution channel; 37, distribution channel; 38, containing channel; 39, containing hole. DETAILED DESCRIPTION

[0025] The present application will now be described in detail in connection with the drawings. The drawing is a simplified schematic diagram and only schematically illustrates the basic structure of the present application, and thus only shows the components related to the present application.

[0026] Referring to Figure 1 , Figure 2 , the present application provides a graphene concrete precast slab and a preparation method thereof. The graphene concrete precast slab comprises two oppositely arranged concrete precast slabs 10, which are fixedly spliced together. The concrete precast slab 10 has a square plate structure. A plurality of flow channels 30 are arranged on the opposite faces of the concrete precast slab 10. Preferably, the flow channels 30 on one concrete precast slab 10 correspond to the flow channels 30 on the other concrete precast slab 10. The flow channels 30 extend from the central part of the concrete precast slab 10 towards the side edge direction of the concrete precast slab 10. The number of flow channels 30 near the side edge of the concrete precast slab 10 is greater than the number of flow channels 30 near the center of the concrete precast slab 10. Feeding bodies 20 are arranged on the two concrete precast slabs 10. The feeding bodies 20 are connected to the flow channels 30. In use, the graphene concrete is poured into the flow channels 30 by using the feeding bodies 20.

[0027] The two concrete prefabricated plates 10 are fixed as a whole by using fasteners such as bolts or screws, the flowing channel 30 between the two concrete prefabricated plates 10 is filled with graphene concrete, the two concrete prefabricated plates 10 are bonded as a whole by using the graphene concrete, the overall quality is ensured, and the local compressive performance is improved; the graphene concrete fills the flowing channel 30 by the high-pressure filling mode, the compressive performance of the side edge of the concrete prefabricated plate 10 is higher due to the large number of the flowing channels 30 on the side edge of the concrete prefabricated plate 10, the strength of the connecting part of the application is improved, the use stability is ensured, meanwhile, the amount of the graphene concrete in the middle part of the concrete prefabricated plate 10 is reduced due to the small stress on the middle part of the concrete prefabricated plate 10, the production cost is effectively reduced, and the resource waste is reduced.

[0028] Further, the concrete prefabricated plate 10 is uniformly provided with a framework 11 made of steel bars. The two concrete prefabricated plates 10 are fixedly connected with a support frame 12 located at the center line of the concrete prefabricated plate 10, and the support frame 12 is parallel to the framework 11.

[0029] Specifically, the concrete prefabricated plate 10 is provided with a mounting groove 34 on the side surface of the flowing channel 30, the mounting groove 34 is semicircular, the mounting groove 34 is located on the symmetry plane of the flowing channel 30, and the support frame 12 is fixedly connected in the mounting groove 34.

[0030] The framework 11 is used to improve the mechanical properties of one concrete prefabricated plate 10, and the support frame 12 is additionally arranged between the two concrete prefabricated plates 10 to improve the overall quality of the two concrete prefabricated plates 10 after being combined into one, and improve the use stability.

[0031] The application relates to Figure 2 、 Figure 3 、 Figure 4 , and the flowing channel 30 comprises an inlet channel 31, a distribution channel 32, a dispensing channel 37 and a containing channel 39.

[0032] Further, the inlet channel 31 is symmetrically arranged on both sides of the support frame 12, the inlet channel 31 is arranged in parallel relative to the axis of the support frame 12, and the inlet channel 31 extends downward from the top surface of the concrete prefabricated plate 10 to the center. The graphene concrete is introduced into the flowing channel 30 between the two concrete prefabricated plates 10 from the inlet channel 31, and the inlet channel 31 is located in the middle part of the concrete prefabricated plate 10, so that the stability of the two concrete prefabricated plates 10 after being combined is ensured.

[0033] Further, the distribution channel 32 is vertically arranged relative to the axis of the support frame 12, the distribution channel 32 is communicated into the feeding channel 31, first and second sub-flow channels 35 and 36 are symmetrically arranged on both sides of the distribution channel 32, and triangular protrusions 33 are arranged in the distribution channel 32 close to the first and second sub-flow channels 35 and 36. Since the length of the distribution channel 32 is shorter than the length of the first and second sub-flow channels 35 and 36, in order to ensure the stability of feeding, triangular protrusions 33 are arranged in the distribution channel 32 to slow down the graphene concrete in the distribution channel 32, thereby ensuring that the graphene concrete can uniformly flow into the distribution channel 37.

[0034] Further, the distribution channel 32 is vertically arranged relative to the axis of the support frame 12, the distribution channel 32 is communicated into the feeding channel 31, first and second sub-flow channels 35 and 36 are symmetrically arranged on both sides of the distribution channel 32, and triangular protrusions 33 are arranged in the distribution channel 32 close to the first and second sub-flow channels 35 and 36. Since the length of the distribution channel 32 is shorter than the length of the first and second sub-flow channels 35 and 36, in order to ensure the stability of feeding, triangular protrusions 33 are arranged in the distribution channel 32 to slow down the graphene concrete in the distribution channel 32, thereby ensuring that the graphene concrete can uniformly flow into the distribution channel 37.

[0035] Further, the distribution channel 32 is vertically arranged relative to the axis of the support frame 12, the distribution channel 32 is communicated into the feeding channel 31, first and second sub-flow channels 35 and 36 are symmetrically arranged on both sides of the distribution channel 32, and triangular protrusions 33 are arranged in the distribution channel 32 close to the first and second sub-flow channels 35 and 36. Since the length of the distribution channel 32 is shorter than the length of the first and second sub-flow channels 35 and 36, in order to ensure the stability of feeding, triangular protrusions 33 are arranged in the distribution channel 32 to slow down the graphene concrete in the distribution channel 32, thereby ensuring that the graphene concrete can uniformly flow into the distribution channel 37.

[0036] In use, the graphene concrete is poured from the feeding channel 31, and then flows into the distribution channel 37 through the distribution channel 32, the first and second sub-flow channels 35 and 36, and then flows into the distribution channel 38, and finally fills the accommodation holes 39 in the distribution channel 38 to complete the pouring.

[0037] The application adds the accommodation channel 38 and the accommodation holes 39 close to the joint part of the concrete prefabricated slab 10, so that the joint part has higher compression resistance, thereby improving the strength of the joint part and ensuring the stability in use.

[0038] It can be understood that the addition of graphene concrete makes the cement hydration product form flower-shaped crystals, increases the compactness of the internal structure, and thus improves the strength. However, the addition of graphene leads to poor flowability and a large increase in viscosity of the concrete, so that a special feeding device needs to be used.

[0039] Please refer to Figure 2 、 Figure 5 、 Figure 6 、 Figure 7The utility model provides a kind of feeding device of graphene concrete precast slab, including feeding body 20, the feeding body 20 is square structure, and feeding body 20 bottom is equipped with mounting seat 22, and mounting seat 22 is fixedly connected by bolt or screw etc.

[0040] Further, first feeding pipe 23 and second feeding pipe 24 are equipped in the feeding body 20, the first feeding pipe 23 is equipped with two, and first feeding pipe 23 extends from the bottom surface of feeding body 20 inward, and one first feeding pipe 23 is opposite one inlet channel 31;Second feeding pipe 24 extends from the top surface of feeding body 20 inward, and second feeding pipe 24 is communicated with first feeding pipe 23, and the feeding connector 21 is installed in first feeding pipe 23.

[0041] Further, the cooperation installation hole 27 is equipped between the two first feeding pipe 23 in the feeding body 20, and the cooperation installation hole 27 is sleeved in the end of support frame 12;When using, directly install feeding body 20 to the end of support frame 12 and utilize bolt or screw etc.

[0042] Further, the separation cavity 28 is equipped in the feeding body 20, and first feeding pipe 23 is communicated with the bottom wall of separation cavity 28, and second feeding pipe 24 is communicated with the top wall of separation cavity 28;The separation ring 25 is rotatably equipped on the bottom wall of separation cavity 28, and the top surface portion of separation ring 25 abuts the top wall of separation cavity 28, and the bottom surface of separation ring 25 is opposite first feeding pipe 23, and notch 251 is equipped on separation ring 25, and notch 251 is communicated with first feeding pipe 23 and second feeding pipe 24.

[0043] When using, graphene concrete enters into separation cavity 28 from second feeding pipe 24, and enters into one of the two first feeding pipe 23 in separation cavity 28.

[0044] Further, the separation ring 25 is provided with an inner ring cavity 252 coaxially arranged in the separation ring 25, and a counterweight 253 is fixedly connected in the inner ring cavity 252 close to the gap 251.

[0045] In use, the separation ring 25 is rotatably arranged in the separation cavity 28 by a sealing bearing (not shown in the figure), when the concrete prefabricated slab 10 rotates, the counterweight 253 falls to the upper opening of a first feeding pipe 23 under the action of gravity, the separation ring 25 rotates and aligns the gap 251 with the upper opening of a first feeding pipe 23, at the same time, the upper opening of another first feeding pipe 23 is closed by the separation ring 25, thereby completing the separation of the two first feeding pipes 23.

[0046] The specific preparation method of the present application is that: step one: placing the framework 11 in a mold, the mold is provided with a flow channel 30 on one side wall, pouring concrete into the mold, and completing the production of a concrete prefabricated slab 10.

[0047] Step two: placing the support frame 12 in the mounting groove 34 on one concrete prefabricated slab 10, and then combining the two concrete prefabricated slabs 10 to make the flow channels 30 oppositely arranged and aligned with each other, and using bolts or screws and the like fasteners to splice and fix the two concrete prefabricated slabs 10 into one, to obtain a prefabricated slab.

[0048] Step three: clamping the prefabricated slab by a clamp, rotating 90° to make the axis of the support frame 12 parallel to the horizontal plane, installing the feeding body 20 at one end of the support frame 12, and making the feeding body 20 communicate with the flow channel 30, high-pressure pouring graphene concrete into the flow channel 30 from the feeding body 20, after the addition is completed, rotating the clamp to continue high-pressure pouring graphene concrete, and completing the production of a graphene concrete prefabricated slab.

[0049] The present application utilizes the characteristics that graphene concrete can make cement hydration products form flower-shaped crystals and increase the compactness of the internal structure, adds the accommodation channel 38 and the accommodation hole 39 near the joint part of the concrete prefabricated slab 10, so that the number of flow channels 30 on the side edge of the concrete prefabricated slab 10 is more, thereby improving the strength of the joint part of the present application and ensuring the use stability, at the same time, since the middle part of the concrete prefabricated slab 10 bears less force, the amount of graphene concrete in the middle part of the concrete prefabricated slab 10 is reduced, the production cost is effectively reduced, and resource waste is reduced.

[0050] It is to be understood that the present application is described by way of example only, and that modifications or alterations can be made to the features and embodiments described without departing from the spirit and scope of the application. In addition, modifications can be made to the features and embodiments described to accommodate specific situations and materials without departing from the spirit and scope of the application. Accordingly, the application is not limited to the specific embodiments disclosed herein, but rather, the scope of the application includes all embodiments falling within the scope of the claims.

Claims

1. A graphene concrete precast slab, comprising two oppositely arranged concrete precast slabs (10), the concrete precast slabs (10) are uniformly provided with a framework (11), and a support frame (12) is fixedly connected between the two concrete precast slabs (10), characterized in that, Two concrete prefabricated slabs (10) are spliced and fixed as a whole, a plurality of flow channels (30) are arranged on opposite surfaces of the concrete prefabricated slabs (10), the flow channels (30) on one concrete prefabricated slab (10) correspond to the flow channels (30) on the other concrete prefabricated slab (10), the flow channels (30) extend from the central part of the concrete prefabricated slab (10) to the side edge direction of the concrete prefabricated slab (10), the number of the flow channels (30) close to the side edge of the concrete prefabricated slab (10) is greater than the number of the flow channels (30) close to the center of the concrete prefabricated slab (10), the flow channels (30) comprise a feeding channel (31), a distribution channel (32), a dispensing channel (37) and a containing channel (38), the dispensing channel (37) is arranged vertically relative to the axis of the support frame (12), the dispensing channel (37) is provided with a plurality of and respectively corresponds to the distribution channel (32), the first flow channel (35) and the second flow channel (36), the containing channel (38) is arranged vertically relative to the axis of the support frame (12), the containing channel (38) is communicated with the dispensing channel (37), a plurality of containing holes (39) are arranged on the opposite two side walls of the containing channel (38), part of the containing holes (39) are straight holes, and part of the containing holes (39) are inclined holes, the feeding channel (31) is symmetrically arranged on both sides of the support frame (12), the feeding channel (31) is arranged in parallel relative to the axis of the support frame (12), and the feeding channel (31) extends downward from the top surface of the concrete prefabricated slab (10) to the center, the distribution channel (32) is arranged vertically relative to the axis of the support frame (12), the distribution channel (32) is communicated with the feeding channel (31), the first flow channel (35) and the second flow channel (36) are symmetrically arranged on both sides of the distribution channel (32), and the distribution channel (32) is provided with a triangular protrusion (33) close to the first flow channel (35) and the second flow channel (36).

2. The feeding device of the graphene concrete precast slab, applied to the graphene concrete precast slab of claim 1, characterized in that, The utility model provides a graphene concrete prefabricated slab, including feeding body (20), feeding body (20) is arranged on two concrete prefabricated slabs (10) and communicates flow channel (30), feeding body (20) top is equipped with feeding joint (21), the feeding joint (21) is circumscribed graphene concrete, the first feeding pipe (23) and second feeding pipe (24) are equipped with in feeding body (20), the first feeding pipe (23) is equipped with two, and the first feeding pipe (23) extends from the bottom surface of feeding body (20) inward, and one first feeding pipe (23) is opposite one inlet channel (31);Second feeding pipe (24) extends from the top surface of feeding body (20) inward, and second feeding pipe (24) communicates first feeding pipe (23), and the feeding joint (21) is installed in first feeding pipe (23), and the separation cavity (28) is equipped with in feeding body (20), and first feeding pipe (23) communicates the bottom wall of separation cavity (28), and second feeding pipe (24) communicates the top wall of separation cavity (28);The bottom wall of separation cavity (28) is equipped with the separation ring (25) rotationally, and the separation ring (25) top surface portion abuts the top wall of separation cavity (28), and the bottom surface of separation ring (25) is opposite first feeding pipe (23), and the separation ring (25) is equipped with notch (251), and notch (251) communicates first feeding pipe (23) and second feeding pipe (24);The inner ring cavity (252) is equipped with in separation ring (25), and the inner ring cavity (252) is coaxially arranged in separation ring (25), and the counterweight (253) is fixedly connected in the inner ring cavity (252) near notch (251), and the counterweight (253) is opposite notch (251).

3. A method of manufacturing a graphene concrete precast panel suitable for use in the graphene concrete precast panel of claim 1, characterised in that, Including: Step one: the skeleton (11) is placed in the mould, and the flow channel (30) is arranged on one side wall of the mould, and the concrete is poured into the mould, and the manufacture of one concrete prefabricated slab (10) is completed; Step two: the support frame (12) is placed in the mounting groove (34) on one concrete prefabricated slab (10), then two concrete prefabricated slabs (10) are combined, the flow channel (30) is oppositely arranged and is aligned with each other, and the two concrete prefabricated slabs (10) are fixed as a whole by using bolt or screw fastener, to obtain a prefabricated slab; Step three: the clamp is clamped to the prefabricated slab, is rotated 90 °, makes the axis of support frame (12) parallel to the horizontal plane, installs feeding body (20) at one end of support frame (12), and makes feeding body (20) communicate flow channel (30), and high-pressure graphene concrete is poured into flow channel (30) from feeding body (20), after adding, rotates the clamp, continues high-pressure graphene concrete and pours, and the manufacture of graphene concrete prefabricated slab is completed.

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