A mold for casting a functionally graded concrete composite structure

Abstract

The utility model discloses a mould for pouring function gradient concrete composite structure, the utility model ingeniously utilizes the partition of metal net, two metal nets divide the cavity into three parts, and form a mixing cavity between two metal nets, and form pouring cavity between each metal net and the inner wall of cavity corresponding side, and two pouring cavities are used for pouring different component concrete. The mesh of metal net makes the concrete part slurry and aggregate in two pouring cavities can ingeniously infiltrate and mix each other at the junction. This " mixing " effect greatly enhances the binding force between two concrete interfaces, avoids the production of weak interface caused by different materials pouring layer by layer. Especially under the gradient construction mode, with the pouring of different level concrete in turn, two kinds of concrete form the herringbone structure near the metal net, thereby forming a composite structure with very high integrity, effectively improving the stability and durability.

Description

Technical Field

[0001] This utility model relates to a mold for casting functional gradient concrete composite structures. Background Technology

[0002] In water conservancy and waterway projects, concrete in spillway sections, water conveyance corridors, and areas subject to collisions with ships faces severe wear and tear, making it highly susceptible to damage such as impact damage, cracking and spalling, exposed and corroded reinforcing steel, and even structural collapse. Once cracks form, external corrosive substances will further penetrate the concrete, exacerbating steel corrosion and concrete decay, creating a vicious cycle. Compared to ordinary structural concrete, impact-resistant and wear-resistant concrete is generally more expensive, and using it for the entire structure results in high economic costs. Actual research revealed that wear primarily occurs on the surface of the structural concrete. Therefore, our company has developed a highly economical functionally graded concrete composite structure based on the design principles of functionally graded materials. Its structure is as follows: Figure 1 As shown, during construction, two construction cavities need to be set up inside the mold cavity, and then two different components of concrete are poured according to the gradient construction method (concrete is poured in layers, i.e., 31-32-33-34-35-36-37-38). Based on this, our company has developed a mold for pouring functional gradient concrete composite structures. Summary of the Invention

[0003] This invention provides a mold for casting functional gradient concrete composite structures to solve the problems existing in the prior art.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] A mold for casting concrete composite structures, comprising:

[0006] Templates, which are assembled and form a cavity;

[0007] Two metal meshes are arranged vertically and spaced apart in the cavity of the template. The two metal meshes divide the cavity into three parts, with a mixing cavity formed between the two metal meshes and a pouring cavity formed between each metal mesh and the corresponding inner wall of the cavity. The two pouring cavities are used to pour concrete of different components.

[0008] Furthermore, the templates are connected by splicing in both the horizontal and vertical directions.

[0009] Furthermore, the template includes a first plate and a second plate, with two first plates and two second plates joined together to form a rectangular frame, and several rectangular frames superimposed and joined together.

[0010] Furthermore, the first plate has insertion holes on its left and right sides, and the second plate has protrusions on its two sides that are adapted to the insertion holes.

[0011] Furthermore, the upper end face of the first plate is provided with a boss, and the lower end face is provided with a groove.

[0012] Furthermore, the gap between the two metal meshes is 15-30cm.

[0013] Furthermore, the two ends of the metal mesh are fixed with steel bars.

[0014] Furthermore, the inner wall of the template is provided with a slot, and the reinforcing bar is placed vertically in the slot.

[0015] This utility model has the following beneficial effects:

[0016] (1) This utility model ingeniously utilizes the separating effect of metal mesh to form a mixing cavity between two metal meshes. Each metal mesh forms a casting cavity between its corresponding inner wall and the cavity, allowing two different concrete components to be cast separately. The mesh openings of the metal mesh allow the concrete in the two casting cavities to cleverly permeate and mix with each other in the mixing cavity at the interface, forming an integral whole with the metal mesh. This "mixing" effect greatly enhances the bonding force between the two types of concrete, avoiding the generation of structural weak surfaces due to the layering of different materials. Especially under the gradient construction method, as different levels of concrete are poured in sequence, the two types of concrete form a toothed joint structure near the metal mesh. The mesh openings of the metal mesh act like a ribbon, tightly weaving the concrete of each level and component together to form a highly integrated composite structure, effectively improving the overall stability and durability of the structure, and providing reliable structural protection for complex working conditions such as water discharge sections and water conveyance corridors in water conservancy projects.

[0017] (2) The template design is well thought out. The first plate and the second plate are spliced ​​by the cooperation of the insertion hole and the protrusion. At the same time, the boss and the groove are used to stack and splice. The assembly and disassembly of the mold is simple and quick, which greatly saves construction time and labor costs. Attached Figure Description

[0018] Figure 1 This is a construction diagram illustrating the pouring of concrete with two different components using a gradient construction method.

[0019] Figure 2 This is a structural diagram of the present utility model.

[0020] Figure 3 This is a structural diagram of the present utility model.

[0021] Figure 4 This is a structural diagram of the first plate. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figures 2 to 4 This utility model discloses a mold for casting concrete composite structures. The mold is rectangular and is formed by splicing templates. Two spaced-apart metal meshes 2 are vertically arranged inside the mold cavity, with a gap of 15-30 cm between the two meshes. The two metal meshes 2 are spaced apart and vertically arranged inside the template cavity, dividing the cavity into three parts. A mixing cavity 20 is formed between the two metal meshes, and a casting cavity 21 is formed between each metal mesh and the corresponding inner wall of the cavity. The two casting cavities are used to cast concrete of different components.

[0024] The mold of this utility model has a splicing structure, which is spliced ​​in both the horizontal and vertical directions. The horizontal direction is spliced ​​to form the mold (i.e., to form the mold), and the vertical direction is to increase the height of the mold.

[0025] First, the two first plates 11 and the two second plates 12 are joined together in the shape of a rectangular frame. During the joining process, the protrusions on both sides of the second plate 12 are inserted into the insertion holes 13 on the left and right sides of the first plate 11 to ensure a tight and secure connection.

[0026] Meanwhile, the upper surface of the first plate 11 is provided with a boss 14, and the lower surface is provided with a groove. After being assembled into a rectangular frame, adjacent rectangular frames can be stacked and spliced ​​together by the cooperation of the boss and the groove to form a mold of the required height. In actual operation, the number of rectangular frames required is determined according to the design requirements, and they are stacked and spliced ​​in sequence.

[0027] Two metal meshes 2 are vertically arranged in the cavity of the mold, and the two metal meshes divide the cavity into three parts. A mixing cavity is formed between the two metal meshes, and a casting cavity 21 is formed between each metal mesh and the corresponding inner wall of the cavity. The two casting cavities are used to cast concrete of different components.

[0028] Steel bars 22 are fixed at both ends of the metal mesh 2. If the metal mesh 2 is placed directly into the cavity at the beginning of pouring, it will tip over. Steel bars 22 are fixed at both ends to facilitate standing the metal mesh 2 upright. In use, a small amount of concrete can be poured into the bottom mold first, and then the steel bars can be inserted into the bottom concrete and allowed to harden before use. To better ensure the steel bars 22 are upright, slots 14 are provided on the inner wall of the formwork 1. In actual use, slots can be provided only on the inner wall of two of the first plates 11 or the second plates 12 in the bottom layer. The width of the slots is greater than the diameter of the steel bars 22, and the steel bars are placed in the slots to prevent them from tipping over. Slots are not required on the inner wall of the plates above the second-to-last layer, as the metal mesh and steel bars can be directly inserted into the concrete to maintain verticality.

[0029] The mesh size and strength of the metal mesh should be selected according to the engineering design requirements.

[0030] The metal mesh allows the concrete in the two pouring cavities 21 to be mixed to a certain extent at the interface through the mesh openings, thus enhancing the bonding effect at the contact point.

[0031] Concrete with different components is poured into two separate pouring cavities 21. Due to the separating effect of the metal mesh 2, the two types of concrete are effectively separated within their respective pouring cavities 21 during the pouring process. Simultaneously, the metal mesh allows for the penetration and "interlocking" of the slurry and aggregates of different particle sizes in the two types of concrete, preventing large aggregates from migrating. This eliminates the need for later formwork removal, simplifying the construction process. Furthermore, the metal mesh strengthens the concrete interface. During pouring, it is crucial to control the pouring speed and vibration method to ensure that the concrete fully fills every corner of the pouring cavity 21, while avoiding excessive impact on the metal mesh 2 and the formwork to prevent deformation or damage. In addition, following a gradient construction method, concrete is poured in layers 31-32-33-34-35-36-37-38, with appropriate vibration to ensure the quality and performance of the entire composite structure.

[0032] After the concrete is poured and cured for a certain period of time until it reaches the design strength, the formwork can be removed. When removing formwork 1, start with the top rectangular frame and disassemble the first plate 11 and the second plate 12 in sequence. Handle the concrete gently during the disassembly process to avoid collisions or damage to the concrete structure.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A mold for casting functionally graded concrete composite structures, comprising: Templates, which are assembled and form a cavity; Two metal meshes are arranged vertically and spaced apart in the cavity of the template. The two metal meshes divide the cavity into three parts, with a mixing cavity formed between the two metal meshes and a pouring cavity formed between each metal mesh and the corresponding inner wall of the cavity. The two pouring cavities are used to pour concrete of different components.

2. The mold for casting functionally graded concrete composite structures as described in claim 1, characterized in that: The templates are connected by splicing in both the horizontal and vertical directions.

3. The mold for casting functionally graded concrete composite structures as described in claim 2, characterized in that: The template includes a first plate and a second plate. The two first plates and the two second plates are spliced ​​together to form a rectangular frame, and several rectangular frames are superimposed and spliced ​​together.

4. The mold for casting functionally graded concrete composite structures as described in claim 3, characterized in that: The first plate has insertion holes on its left and right sides, and the second plate has protrusions on its two sides that are adapted to the insertion holes.

5. The mold for casting functionally graded concrete composite structures as described in claim 3, characterized in that: The upper end face of the first plate is provided with a boss, and the lower end face is provided with a groove.

6. The mold for casting functionally graded concrete composite structures as described in claim 1, characterized in that: The gap between the two metal meshes is 15-30cm.

7. The mold for casting functionally graded concrete composite structures as described in claim 1, characterized in that: The metal mesh is fixed with steel bars at both ends.

8. The mold for casting functionally graded concrete composite structures as described in claim 7, characterized in that: The template has a slot on its inner wall, and the reinforcing bars are placed vertically in the slot.

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