Recycled concrete aggregate strong washing and impregnation strengthening integrated device and preparation method

Abstract

The application discloses a recycling concrete aggregate strong washing and impregnation strengthening integrated device and a preparation method. The device comprises a liquid tank and an electric push rod fixed on the upper surface of the liquid tank. The upper end of the electric push rod is fixed with a support frame. The lower surface of the support frame is fixed with a connecting rod. The lower end of the connecting rod is fixed with a water-permeable plate. Two groups of adjusting assemblies are symmetrically arranged in the liquid tank. The adjusting assemblies are connected with the connecting rod on one side of the support frame. An ultrasonic dispersing machine is arranged on the inner wall of the liquid tank. The water-permeable plate is provided with a plurality of water-permeable holes. The device can lift the treated aggregate from the liquid tank and pour it into a subsequent screen tank for screening. The mud powder and weak mortar on the surface of the aggregate can be efficiently stripped by the ultrasonic dispersing machine. The device not only avoids secondary damage caused by mechanical methods, but also avoids the negative influence of acid root ions on the pH value. In addition, no additional chemical reagent is needed, and the operation cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of building materials technology, specifically a device and preparation method for integrating strong washing and impregnation reinforcement of recycled concrete aggregate. Background Technology

[0002] Recycled concrete aggregate is obtained by crushing and processing waste concrete. Compared with natural concrete aggregate, recycled concrete aggregate has hardened cement paste and mud powder adhering to its surface. The presence of hardened cement paste leads to high water absorption and low strength in recycled concrete aggregate, resulting in a significant reduction in performance compared to ordinary concrete. By strengthening recycled concrete aggregate and improving its physical and mechanical properties, it can be applied to structural layers with higher performance requirements, replacing natural concrete aggregate and generating better ecological benefits and economic value.

[0003] Currently, existing methods for strengthening recycled concrete aggregates both domestically and internationally include mechanical strengthening, acid washing, polymer treatment, and cement admixture with silica fume. Among these, mechanical strengthening can damage the aggregates; acid washing has limited effectiveness and introduces acid ions, affecting the pH value of the adhering mortar; polymer treatment effectively reduces the water absorption rate of recycled concrete aggregates, but its strength improvement is limited. Therefore, we propose an integrated device and process for strengthening and impregnating recycled concrete aggregates to address these issues. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies by proposing an integrated device and method for the strong washing and impregnation reinforcement of recycled concrete aggregates. This invention can remove mud, powder, and weak mortar, as well as seal rough pores, thereby improving the aggregate's strength, reducing water absorption, and enhancing its durability.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] An integrated device for washing and impregnating recycled concrete aggregate includes a liquid tank and an electric actuator fixed to the upper surface of the liquid tank; a support frame is fixed to the upper end of the electric actuator; connecting rods are fixed to the lower surface of the support frame and at least at its four corners; a permeable plate is fixed to the lower end of the connecting rods; two sets of symmetrically arranged adjustment components are also installed inside the liquid tank; the adjustment components are connected to the connecting rods on one side of the support frame; multiple ultrasonic dispersers are installed on the inner wall of the liquid tank, and these ultrasonic dispersers are evenly arranged on the sides and bottom of the liquid tank; the permeable plate has multiple permeable holes.

[0007] In this invention, multiple electric actuators are provided for lifting the support frame. These actuators are independently controllable, facilitating adjustment of the support frame's tilt. The dimensions of the support frame match the dimensions of the liquid tank; that is, the connecting rods at the four corners of the support frame are also located at the four corners of the liquid tank. In addition to the connecting rods at the four corners, connecting rods can be installed at other locations on the lower surface of the support frame, depending on the actual situation, to ensure that the support frame stably lifts the permeable slab containing recycled concrete aggregate via the connecting rods. The liquid tank is filled with reinforcing liquid and aggregate, and the permeable slab separates the aggregate from the reinforcing liquid through permeable holes.

[0008] As a further explanation of the present invention, the upper part of the side plate on one side of the liquid tank is provided with a placement groove and a discharge groove for placing the adjustment component; the adjustment component includes a threaded rod, a threaded tube, a baffle and a gear; one end of the threaded rod is fixedly installed with the gear and rotatably connected to the inner wall of the placement groove, and the other end is threadedly connected to the threaded tube; the other end of the threaded tube is fixed to the baffle; the baffle moves between the placement groove and the discharge groove by the rotation of the gear.

[0009] The threaded rod is threadedly connected to the threaded pipe. When the threaded rod rotates, since the position of the threaded rod remains unchanged, the threaded pipe will either be inserted into or removed from the threaded rod, thereby causing the baffle to move back and forth.

[0010] The discharge trough is located at the center of the upper part of the side plate on one side of the liquid tank, and the placement troughs are located on both sides of the discharge trough.

[0011] As a further explanation of the present invention, the surface of the liquid tank is also provided with a groove, and the gear passes through the groove; a toothed plate is embedded on the side of the connecting rod connected to the adjustment component, the toothed plate meshes with the gear, and the gear rotates by the movement of the toothed plate.

[0012] The groove is formed at the mounting position of the gear, and the outer side of the groove corresponds to the side of the connecting rod.

[0013] As a further illustration of the present invention, the ultrasonic disperser includes an ultrasonic generator, a transducer, and a vibration intensifier, used for cleaning and crushing aggregates filled inside a liquid tank. The ultrasonic disperser is a commercially available product.

[0014] The device of the present invention also includes an external control device connected to a 220V mains power supply. The control device uses conventional known devices such as computers (PCs), PLCs, and MCUs for control, and is used to control the working status of electrical components such as electric actuators and ultrasonic dispersers.

[0015] This invention also provides a method for preparing recycled concrete aggregate, which uses the integrated device for strong washing and impregnation reinforcement of recycled concrete aggregate as described above, and includes the following steps:

[0016] Step 1: Untreated recycled concrete aggregate is poured into the permeable plate inside the liquid tank via a conveyor belt, and reinforcing liquid is poured into the liquid tank.

[0017] Step 2: The recycled concrete aggregate in the liquid tank is subjected to strong washing and impregnation using an ultrasonic disperser. The strong washing and impregnation time of the recycled concrete aggregate is dynamically adjusted according to the different aggregate particle sizes or pollution levels based on test data, and is generally not less than 120 seconds.

[0018] Step 3: After the recycled concrete aggregate is subjected to strong washing and impregnation treatment, the electric actuator pushes the support frame upward. As the connecting rod moves upward with the support frame, it drives the gear to rotate, thereby moving the baffle from the discharge chute to the placement chute. The recycled concrete aggregate is discharged from the discharge chute and poured into the screening bin for screening and grading storage.

[0019] As a further explanation of the method described in this invention, in step one, the reinforcing liquid is a hydrophilic material, which is made by mixing the following raw materials in parts by weight: 10-15 parts of vinyl alcohol, 85-90 parts of water, 1-3 parts of chitosan, 0.5-2 parts of crosslinking agent, 0.1-0.5 parts of antifungal agent, and 5-10 parts of additives.

[0020] As a further explanation of the method described in this invention, the crosslinking agent is pentylene glycol diglycidyl ether, the antifungal agent is a silver ion antifungal agent and / or a zinc ion antifungal agent, and the auxiliary agent is a surfactant.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. This invention uses an electric actuator, support frame, connecting rod, permeable plate, and adjustment components to lift the treated aggregate from the liquid chamber and pour it into the subsequent screen chamber for screening. Furthermore, the ultrasonic disperser can efficiently remove mud powder and weak mortar from the surface of the aggregate, avoiding secondary damage caused by mechanical methods and the negative impact of residual acid ions on pH value. Moreover, it eliminates the need for additional chemical reagents, thus reducing operating costs.

[0023] 2. This invention impregnates recycled concrete aggregate with a reinforcing liquid to seal the rough pores on the aggregate surface, reducing water absorption. It also improves the overall strength and durability of the aggregate through crosslinking agents and antifungal agents. The hydrophilic polymer forms a film that seals the surface pores and reduces water absorption. At the same time, the intermolecular crosslinking enhances the stability of the coating, thereby improving the strength and crack resistance of the aggregate. The addition of antifungal agents can inhibit microbial erosion and extend the durability of recycled concrete in humid environments.

[0024] 3. The present invention utilizes the large amplitude ultrasonic waves of the ultrasonic disperser to generate higher energy density, which significantly improves crushing efficiency, reduces processing time, and generates a stronger cavitation effect due to the increased amplitude, which helps to improve the crushing and dispersion of materials. At the same time, it can effectively process fine particles.

[0025] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the integrated device for strong washing and impregnation reinforcement of recycled concrete aggregate in this invention.

[0027] Figure 2 This is a partial cross-sectional structural schematic diagram of the integrated device for strong washing and impregnation of recycled concrete aggregate in this invention.

[0028] Figure 3 This is an exploded schematic diagram of the integrated device for strong washing and impregnation reinforcement of recycled concrete aggregate in this invention.

[0029] Figure 4 This is a schematic diagram of the structure of the integrated device for washing and impregnating recycled concrete aggregates in the present invention during the material lifting process.

[0030] In the diagram: 1-Liquid tank; 101-Placement trough; 102-Groove; 103-Discharge trough; 2-Electric actuator; 3-Support frame; 4-Connecting rod; 401-Gear plate; 5-Permeable plate; 6-Adjusting component; 601-Threaded rod; 602-Threaded pipe; 603-Baffle; 604-Gear; 7-Ultrasonic disperser. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-4 The present invention provides the following implementation scheme:

[0033] An integrated device for washing and impregnating recycled concrete aggregate includes a liquid tank 1 and an electric actuator 2 fixed to the upper surface of the liquid tank 1; a support frame 3 is fixed to the upper end of the electric actuator 2; connecting rods 4 are fixed to the lower surface of the support frame 3 and at least at its four corners; a permeable plate 5 is fixed to the lower end of the connecting rods 4; two sets of symmetrically arranged adjustment components 6 are also installed inside the liquid tank 1; the adjustment components 6 are connected to the connecting rods 4 on one side of the support frame 3; multiple ultrasonic dispersers 7 are installed on the inner wall of the liquid tank 1 and are evenly arranged on the sides and bottom of the liquid tank 1; the permeable plate 5 has multiple permeable holes.

[0034] This embodiment further illustrates that the upper part of the side plate on one side of the liquid tank 1 is provided with a placement groove 101 and a discharge groove 103 for placing the adjustment component 6; the adjustment component 6 includes a threaded rod 601, a threaded tube 602, a baffle 603, and a gear 604; one end of the threaded rod 601 is fixedly mounted with the gear 604 and rotatably connected to the inner wall of the placement groove 101, and the other end is threadedly connected to the threaded tube 602; the other end of the threaded tube 602 is fixed to the baffle 603; the baffle 603 moves between the placement groove 101 and the discharge groove 103 by the rotation of the gear 604.

[0035] Furthermore, the surface of the liquid tank 1 is provided with a groove 102, and the gear 604 passes through the groove 102; the connecting rod 4 connected to the adjusting component 6 is provided with a toothed plate 401 on its side, the toothed plate 401 meshes with the gear 604, and the gear 604 rotates by moving the toothed plate 401.

[0036] In this embodiment, the liquid tank 1 is filled with reinforcing liquid and aggregate, and the aggregate and reinforcing liquid are separated by the permeable holes of the permeable plate 5.

[0037] The device in this embodiment, through the electric push rod 2, support frame 3, connecting rod 4, permeable plate 5, and adjustment component 6, can lift the processed aggregate from the liquid chamber and pour it into the subsequent screen chamber for screening. Furthermore, the ultrasonic disperser 7 can efficiently remove mud powder and weak mortar from the surface of the aggregate, which not only avoids secondary damage caused by mechanical methods but also avoids the negative impact of residual acid ions on the pH value. Moreover, it does not require additional chemical reagents, thus reducing operating costs.

[0038] The preparation of recycled concrete aggregate using this embodiment includes the following steps:

[0039] Step 1: Untreated recycled concrete aggregate is poured onto the permeable plate 5 inside the liquid tank 1 via a conveyor belt, and reinforcing liquid is poured into the liquid tank 1.

[0040] The reinforcing liquid is a hydrophilic material, which is made by mixing the following raw materials in parts by weight: 10-15 parts of vinyl alcohol, 85-90 parts of water, 1-3 parts of chitosan, 0.5-2 parts of crosslinking agent, 0.1-0.5 parts of antifungal agent, and 5-10 parts of additives.

[0041] Step 2: The recycled concrete aggregate in liquid tank 1 is subjected to strong washing and impregnation by ultrasonic disperser 7, and the strong washing and impregnation time of the recycled concrete aggregate is not less than 120s.

[0042] Step 3: After the recycled concrete aggregate is subjected to strong washing and impregnation treatment, the electric actuator 2 pushes the support frame 3 upward. When the connecting rod 4 moves upward with the support frame 3, it drives the gear 604 to rotate, thereby causing the baffle 603 to move from the discharge chute 103 to the placement chute 101. The recycled concrete aggregate is discharged from the discharge chute 103 and poured into the screening bin for screening and grading storage.

[0043] To further clarify, the crosslinking agent is pentylene glycol diglycidyl ether, the antifungal agent is a silver ion antifungal agent and / or a zinc ion antifungal agent, and the auxiliary agent is a surfactant.

[0044] In this embodiment, the method of impregnating recycled aggregate with reinforcing liquid seals the rough pores on the surface of the aggregate, reducing the water absorption rate. The overall strength and durability of the aggregate are improved by crosslinking agent and antifungal agent. The hydrophilic polymer forms a film to seal the surface pores and reduce the water absorption rate. At the same time, the intermolecular crosslinking enhances the stability of the coating, which can improve the strength and crack resistance of the aggregate. The addition of antifungal agent can inhibit microbial erosion and extend the durability of recycled concrete in humid environments.

[0045] The working principle of this embodiment is as follows: First, the liquid tank 1 is placed in a designated location and connected to an external control device and a 220V mains power supply. The control device can be a conventional known device such as a computer. Then, the worker pours the untreated recycled aggregate into the liquid tank 1 via a conveyor belt and adds reinforcing liquid. Next, the worker controls the ultrasonic disperser 7 to operate through the control device. The ultrasonic disperser 7 performs strong washing and impregnation of the recycled aggregate in the liquid tank 1. The strong washing and impregnation time of the recycled aggregate is dynamically adjusted based on different aggregate particle sizes or contamination levels according to experimental data, generally not less than 120 seconds.

[0046] Then, the staff controls the electric actuator 2 through the control equipment. The electric actuator 2 drives the support frame 3 to move, thereby driving the connecting rod 4 fixed on the lower surface of the support frame 3 and the permeable plate 5 fixed at the lower end of the connecting rod 4 to move synchronously. This, in turn, drives the recycled aggregate placed on the surface of the permeable plate 5 to move. At the same time, during the movement of the connecting rod 4, it can drive the toothed plate 401 embedded on its side to move. The toothed plate 401 can drive the gear 604 to rotate, thereby driving the threaded rod 601 to rotate. The rotation of the threaded rod 601 can drive the threaded tube 602 to move, thereby driving the baffle 603 fixed at one end of the threaded tube 602 to move, retracting the baffle 603 into the placement groove 101, so that the recycled aggregate can be discharged from the discharge groove 103 into the liquid tank 1.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. An integrated device for strong washing and impregnation reinforcement of recycled concrete aggregate, comprising a liquid tank (1), characterized in that: It also includes an electric push rod (2) fixed to the upper surface of the liquid tank (1); a support frame (3) is fixed to the upper end of the electric push rod (2); a connecting rod (4) is fixed to the lower surface of the support frame (3) and at least at the four corners; a permeable plate (5) is fixed to the lower end of the connecting rod (4); two sets of symmetrically arranged adjustment components (6) are also installed inside the liquid tank (1); the adjustment components (6) are connected to the connecting rod (4) on one side of the support frame (3); an ultrasonic disperser (7) is installed on the inner wall of the liquid tank (1), and there are multiple ultrasonic dispersers (7) evenly arranged on the side and bottom of the liquid tank (1); the permeable plate (5) is provided with multiple permeable holes; The upper part of the side plate on one side of the liquid tank (1) is provided with a placement slot (101) and a discharge slot (103) for placing the adjustment component (6); the adjustment component (6) includes a threaded rod (601), a threaded tube (602), a baffle (603) and a gear (604); one end of the threaded rod (601) is fixedly installed with the gear (604) and rotatably connected to the inner wall of the placement slot (101), and the other end is threadedly connected to the threaded tube (602); the other end of the threaded tube (602) is fixed on the baffle (603); the baffle (603) moves between the placement slot (101) and the discharge slot (103) by the rotation of the gear (604); The surface of the liquid tank (1) is also provided with a groove (102), and the gear (604) passes through the groove (102); the connecting rod (4) connected to the adjustment component (6) is provided with a toothed plate (401) on its side, the toothed plate (401) meshes with the gear (604), and the gear (604) rotates by the movement of the toothed plate (401).

2. The integrated device for strong washing and impregnation reinforcement of recycled concrete aggregate according to claim 1, characterized in that: The ultrasonic disperser (7) includes an ultrasonic generator, a transducer and a vibration intensifier, used to clean and crush the aggregates filled inside the liquid tank (1).

3. A method for preparing recycled concrete aggregate, characterized in that, The preparation process using the integrated device for strong washing and impregnation reinforcement of recycled concrete aggregate as described in claim 1 includes the following steps: Step 1: Untreated recycled concrete aggregate is poured onto the permeable plate (5) inside the liquid tank (1) via a conveyor belt, and reinforcing liquid is poured into the liquid tank (1); Step 2: The recycled concrete aggregate in the liquid tank (1) is subjected to strong washing and impregnation by ultrasonic disperser (7). The strong washing and impregnation time of the recycled concrete aggregate is dynamically adjusted according to the different aggregate particle size or pollution degree based on the test data, and is generally not less than 120s. Step 3: After the recycled concrete aggregate is washed and impregnated, the electric push rod (2) pushes the support frame (3) upward. When the connecting rod (4) moves upward with the support frame (3), it drives the gear (604) to rotate, thereby causing the baffle (603) to move from the discharge chute (103) to the placement chute (101). The recycled concrete aggregate is discharged from the discharge chute (103) and poured into the screening bin for screening and grading storage.

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