A curing device for construction waste recycled C50 concrete

Abstract

The utility model relates to the technical field of regenerative C50 concrete maintenance, discloses a kind of maintenance devices of construction waste regenerative C50 concrete, including maintenance cover body and water storage tank, the inner wall of maintenance cover body is fixed with water collecting tank in the position close to bottom, the bottom of maintenance cover body side is equipped with water outlet, the top of inside maintenance cover body is equipped with even wet plate, and maintenance cover body and water storage tank are fixedly connected by mounting bracket, the top of water storage tank side is fixed with overflow pipe;The utility model utilizes capillary action automatic water delivery and gravity effect to realize water circulation, completely need not electric power, water pump or intelligent control system, can spontaneously, continuously maintain relative humidity in maintenance space, perfect fit the harsh requirement of construction waste regenerative high-strength concrete to stable humid environment, effectively prevent shrinkage cracking and hydration deficiency due to water loss, guarantee the final strength and durability of concrete.

Description

Technical Field

[0001] This utility model relates to the field of recycled C50 concrete curing technology, specifically a curing device for recycled C50 concrete from construction waste. Background Technology

[0002] Recycled aggregate concrete technology is an important way to achieve sustainable development in the building materials industry. Among its applications, using recycled aggregates to formulate high-performance concrete with a strength grade of C50 or higher represents one of the most valuable directions for resource utilization. However, recycled aggregates, due to their inherent characteristics such as the presence of old cement paste on their surface and numerous internal microcracks, have high porosity and water absorption. This makes the early curing stage of recycled high-strength concrete particularly critical. The strength and durability of concrete mainly depend on the degree of cement hydration, and sufficient hydration requires a continuous, moist environment. If water is lost during early curing, not only will the hydration reaction cease, but severe plastic shrinkage and drying shrinkage will also occur due to capillary negative pressure. This will create microcracks at the weak interface between the recycled aggregate and the old and new cement paste, significantly reducing the final strength, impermeability, and durability of the concrete, thus preventing the advantages of recycled high-strength concrete from being realized.

[0003] Currently, the curing of concrete components mainly employs traditional manual curing or automated spray curing systems. However, the following problems exist in practical applications: Manual curing uses methods such as periodic watering and covering with straw mats or plastic sheets. This method results in short humidity retention time, extremely poor uniformity, and high dependence on manual operation, leading to unstable curing quality and failing to meet the stringent requirements of recycled C50 concrete for a constant humidity environment. Automated spray curing systems achieve automatic humidification through humidity sensors, controllers, and spray devices. While this method offers better curing results, it has significant drawbacks: complex system structure, high cost, requiring external power supply and intelligent control system, high energy consumption, and unsuitability for construction sites with little or no electricity; spray nozzles are prone to clogging, requiring highly specialized maintenance, making it economical and unsuitable for most small and medium-sized precast component factories or conventional construction sites. Utility Model Content

[0004] The purpose of this invention is to provide a curing device for recycled C50 concrete from construction waste, which has the effect of constant humidity curing.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a curing device for C50 concrete recycled from construction waste, comprising a curing hood and a water storage tank, wherein a water collection trough is fixedly provided on the inner wall of the curing hood near the bottom, a water outlet is provided on the bottom of one side of the curing hood, a moisture equalization plate is provided on the upper part of the curing hood, the curing hood and the water storage tank are fixedly connected by a mounting bracket, an overflow pipe is fixedly provided on the top of one side of the water storage tank, a water inlet is provided on one side of the water storage tank above the overflow pipe, a return pipe is provided between the water inlet and the water outlet, a one-way valve is provided at the end of the return pipe near the water storage tank, and a capillary water guiding structure is provided between the moisture equalization plate and the water storage tank.

[0006] A further feature of this invention is that a sealing seat is fixedly provided at the bottom end of the curing cover, and a sealing skirt made of rubber material is embedded at the bottom of the sealing seat.

[0007] A further feature of this invention is that each of the four corners of the top of the maintenance cover is fixedly provided with a hanging ring.

[0008] A further feature of this invention is that the moisture equalization plate is composed of a thermal insulation cotton layer, a metal mesh plate, and a non-woven fabric layer bonded together from top to bottom. The bottom of both sides of the moisture equalization plate is provided with a fixing frame, which is connected to the top of the curing cover by fixing screws.

[0009] A further feature of this invention is that the capillary water-conducting structure includes a first water-conducting belt, a second water-conducting belt, and an immersion seat, all of which are made of materials with extremely strong capillary water-conducting capabilities. The immersion seat is disposed inside the water storage tank and is connected to the top end of the first water-conducting belt. The other end of the first water-conducting belt passes through the water storage tank and the curing cover and is connected to the surface of the second water-conducting belt. A sealing structure is provided at the connection between the water-conducting belt and the water storage tank and the curing cover. An embedding groove is provided on the surface of the insulation cotton layer, and the second water-conducting belt is embedded inside the embedding groove.

[0010] A further feature of this invention is that an upper mounting seat is fixedly provided at the top of the mounting frame, and the upper mounting seat is fixedly connected to the bottom of the water storage tank by mounting bolts; a lower mounting seat is fixedly provided at the other end of the mounting frame, and the lower mounting seat is fixedly connected to one side of the maintenance cover by mounting bolts.

[0011] A further feature of this invention is that the top of the water storage tank is provided with a tank cover, the tank cover is connected to the top of the water storage tank by fixing bolts, and the surface of the tank cover is provided with a water inlet pipe.

[0012] A further feature of this invention is that: both ends of the return pipe are fixedly provided with mounting plates, the mounting plates are connected to the sides of the maintenance cover and the water storage tank by mounting screws, and a sealing gasket is provided on the inner side of the mounting plates.

[0013] In summary, this utility model has the following beneficial effects: 1. It utilizes capillary action to automatically transport water and gravity to achieve water circulation. It requires no electricity, water pumps or intelligent control systems. It can spontaneously and continuously maintain relative humidity in the curing space, perfectly meeting the stringent requirements of recycled high-strength concrete from construction waste for a stable and humid environment. It effectively prevents shrinkage cracking and insufficient hydration caused by water loss, ensuring the final strength and durability of the concrete. 2. By setting up a large-area uniform moisture distribution plate, water first diffuses evenly inside and then slowly evaporates across the entire lower surface, forming a stable and uniform humidity field. This overcomes the uneven wetting and drying problem caused by traditional spraying or sprinkling, ensuring the consistency of performance of various parts of the concrete component. The unique gravity recirculation design collects the condensed water droplets after evaporation and the unevaporated water, and automatically returns them to the water storage tank for recycling, greatly reducing the consumption of fresh water during the curing process. This is an environmentally friendly water-saving technology. 3. The entire device consists of simple mechanical components such as a curing hood, water tank, pipes, and a uniform moisture distribution plate. It does not require expensive electronic sensors or controllers, which not only reduces manufacturing costs but also makes operation and maintenance very simple. It has a long service life and is particularly suitable for large-scale application in small and medium-sized precast component factories or construction sites with limited construction conditions. The sealing skirt at the bottom of the curing hood effectively prevents the leakage of moisture and steam, ensuring curing efficiency. At the same time, the water tank is connected to the curing hood through a sturdy mounting bracket to form a whole, ensuring the stability of the device during use. Attached Figure Description

[0014] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model; Figure 2 This is the second three-dimensional structural schematic diagram of the present invention; Figure 3 This is the third three-dimensional structural schematic diagram of the present invention; Figure 4 This is one of the cross-sectional structural schematic diagrams of this utility model; Figure 5 This is the second cross-sectional structural schematic diagram of the present invention; Figure 6 This is a schematic diagram of the structure of the uniform moisture distribution plate of this utility model; Figure 7 This is a schematic diagram of the capillary water-guiding structure of this utility model.

[0015] In the diagram: 1. Curing cover; 101. Sealing seat; 102. Sealing skirt; 103. Water collection trough; 104. Water outlet; 105. Lifting ring; 2. Wet distribution board; 201. Insulation cotton layer; 202. Embedding groove; 203. Metal mesh plate; 204. Non-woven fabric layer; 205. Fixing frame; 3. Water storage tank; 301. Tank cover; 302. Water inlet pipe; 303. Overflow pipe; 304. Water inlet; 4. Mounting frame; 401. Upper mounting seat; 402. Lower mounting seat; 5. Return pipe; 501. One-way valve; 6. Water guide belt one; 601. Immersion seat; 602. Water guide belt two. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings of the embodiments thereof.

[0017] Please see Figures 1-7 In this embodiment of the utility model, a curing device for recycled C50 concrete from construction waste includes a curing cover 1, a uniform wetting board 2, a water storage tank 3, a capillary water guiding structure, and a return pipe 5.

[0018] The curing cover 1 is a rigid shell made of engineering plastic or fiberglass, used to cover the concrete component to be cured, forming a sealed curing space. To ensure the sealing effect, a sealing seat 101 is fixedly provided at the bottom of the curing cover 1. The bottom of the sealing seat 101 is embedded with a sealing skirt 102 made of rubber material. When the curing cover 1 is placed on the ground or a platform, the sealing skirt 102 undergoes elastic deformation, tightly adhering to the ground, effectively preventing water vapor in the curing space from escaping.

[0019] To facilitate hoisting and movement, lifting rings 105 are fixedly welded to the four corners of the top of the curing cover 1; a U-shaped water collection trough 103 is fixed to the inner wall of the curing cover 1 near the bottom by buckles or screws to collect condensate droplets; a water outlet 104 is provided at the bottom of the side of the curing cover 1 corresponding to the lowest point of the water collection trough 103 for connecting the return pipe 5.

[0020] The uniform moisture distribution board 2 is suspended and fixed above the inside of the curing cover 1 by a fixing frame 205, with its lower surface maintaining a distance of 50-150mm from the upper surface of the concrete component. The uniform moisture distribution board 2 has a composite layered structure, consisting of an insulation cotton layer 201, a metal mesh plate 203, and a non-woven fabric layer 204 bonded together with environmentally friendly adhesive from top to bottom. The insulation cotton layer 201, such as rock wool board, serves as the core water storage and water guiding layer, responsible for absorbing and evenly distributing moisture. The metal mesh plate 203 serves as a support and fixing layer, preventing the insulation cotton layer 201 from sagging. The non-woven fabric layer 204 serves as an evaporation contact layer, allowing moisture to evaporate evenly and preventing the formation of water droplets.

[0021] The capillary water-guiding structure is used to transport water from the water storage tank 3 to the uniform wetting plate 2; specifically, the structure includes an immersion seat 601, a first water-guiding belt 6, and a second water-guiding belt 602; the immersion seat 601 is a block made of porous material, submerged at the bottom of the water storage tank 3, with the top of the first water-guiding belt 6 connected to it; the first water-guiding belt 6 is made of strong capillary materials such as microfiber or cotton yarn, and its other end penetrates through the outer wall of the water storage tank 3 and the curing cover 1, with a dense layer at the penetration point. Sealing structures such as sealing rings are used to prevent leakage; after entering the interior of the curing cover 1, the end of the first water-guiding belt 6 overlaps with the second water-guiding belt 602 laid flat on the upper surface of the uniform moisture plate 2; in order to fix the second water-guiding belt 602, an embedding groove 202 is provided on the surface of the insulation cotton layer 201, and the second water-guiding belt 602 is embedded in the groove; water passes through the immersion seat 601, the first water-guiding belt 6, and the second water-guiding belt 602 in sequence through capillary action, and finally wets the entire uniform moisture plate 2.

[0022] The water storage tank 3 is fixed to one side of the curing cover 1 by the mounting bracket 4, and the bottom surface of the water storage tank 3 is higher than the upper surface of the uniform moisture plate 2; one end of the mounting bracket 4 is fixedly connected to the bottom end of the water storage tank 3 by the upper mounting base 401 and the mounting bolt, and the other end is fixedly connected to the outer wall of the curing cover 1 by the lower mounting base 402 and the mounting bolt, thereby forming a stable whole.

[0023] The top of the water storage tank 3 is provided with an openable tank cover 301, which is sealed by fixing bolts. The surface of the tank cover is provided with a water inlet pipe 302 for connecting to an external water source for initial water filling. An overflow pipe 303 is fixedly connected to the top of one side of the water storage tank 3. When water is filled through the water inlet pipe 302 to the height of the overflow pipe 303, excess water is discharged from the overflow pipe 303, thereby keeping the water level in the water storage tank 3 constant. A water inlet hole 304 is provided above the overflow pipe 303 for connecting to the return pipe 5.

[0024] The return pipe 5 is connected between the water outlet 104 of the maintenance cover 1 and the water inlet 304 of the water storage tank 3. The return pipe 5 is configured to be inclined upwards from the water collection tank 103 towards the water storage tank 3 to avoid air blockage. A one-way valve 501 (such as a duckbill valve) is provided at the end of the return pipe 5 near the water storage tank 3. The one-way valve 501 only allows water to flow from the water collection tank 103 to the water storage tank 3 to prevent backflow. To achieve a reliable connection, both ends of the return pipe 5 are fastened to the sides of the maintenance cover 1 and the water storage tank 3 respectively by mounting plates and mounting screws, and a sealing gasket is provided on the inner side of the mounting plate to ensure a seal.

[0025] In use, the curing cover 1 is first placed over the concrete block using the lifting ring 105. Then, water is injected into the tank through the inlet pipe 302 at the top of the water tank 3. The water flows continuously until the water level reaches the height of the overflow pipe 303 at the top of the side wall of the water tank 3. At this time, excess water will be automatically discharged from the overflow pipe 303, thus ensuring that the water level in the water tank 3 is always maintained at a constant height. This constant water level is the basis for ensuring the stability of capillary water transport. After the system initialization is completed, the water in the water tank 3 is transported through the capillary water intake structure. Specifically, the water is first absorbed by the immersion seat 601 submerged at the bottom of the water tank 3, and then drawn to the water intake belt 6 through capillary action. Water-guiding belt 602 runs through the box body and the curing cover 1, delivering water into the curing cover 1 and then to water-guiding belt 602, which is laid flat on the surface of the moisture equalization board 2. Water-guiding belt 602 delivers water directly to the moisture equalization board 2. The moisture equalization board 2 is composed of a thermal insulation cotton layer 201, a metal mesh plate 203, and a non-woven fabric layer 204. Its material has extremely strong water absorption and lateral diffusion capabilities, allowing water to quickly and evenly diffuse within the moisture equalization board 2, saturating the entire board. The saturated moisture equalization board 2, especially its bottom... The non-woven fabric layer 204 provides a large evaporation surface area, allowing moisture to slowly and evenly evaporate from the surface of the uniform moisture distribution board 2 into the sealed curing space below. This causes the water vapor concentration in the air inside the curing enclosure 1 to rise rapidly, and the relative humidity can be maintained for a long time. This stable high-humidity environment surrounds the concrete component below, ensuring that the cement hydration reaction can proceed fully and effectively inhibiting the plastic shrinkage and drying shrinkage of the concrete. During the curing process, some of the moisture that fails to evaporate in time will condense into droplets on the surface of the uniform moisture distribution board 2. Water droplets may condense on the cooler surface of the enclosure wall and flow down the wall. These droplets are eventually collected in the water collection trough 103 at the bottom of the inner wall of the curing enclosure 1. As the water level in the collection trough 103 rises, when it exceeds the outlet hole 104 of the return pipe 5 on the curing enclosure 1, the water flows into the return pipe 5 under gravity. The return pipe 5 is designed to slope upwards from the water collection trough 103 towards the water storage tank 3. The water flows forward in the return pipe 5, pushing open the single [unclear - possibly a specific point or feature] located near the water storage tank 3 at the end of the pipe. The water is ultimately returned to the water storage tank 3 through the inlet hole 304 on the water storage tank 3 via the one-way valve 501 (such as a duckbill valve). The function of the one-way valve 501 is to ensure that the water flow can only flow from the water collection tank 103 back to the water storage tank 3 in one direction, preventing the water in the water storage tank 3 from flowing back. After the water flowing back to the water storage tank 3 is mixed with the freshly replenished water, it can be transported to the uniform humidity plate 2 again by the capillary water guiding structure to continue to participate in the process of evaporation, condensation and reflux. This cycle repeats itself, forming a self-sufficient constant humidity maintenance closed loop that does not require any external energy input.

[0026] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A curing device for recycled C50 concrete from construction waste, comprising a curing hood (1) and a water storage tank (3), characterized in that, The inner wall of the curing cover (1) is fixedly provided with a water collection tank (103) near the bottom. A water outlet (104) is provided at the bottom of one side of the curing cover (1). A moisture equalization plate (2) is provided at the top inside the curing cover (1). The curing cover (1) and the water storage tank (3) are fixedly connected by a mounting bracket (4). An overflow pipe (303) is fixedly provided at the top of one side of the water storage tank (3). A water inlet (304) is provided on one side of the water storage tank (3) and above the overflow pipe (303). A return pipe (5) is provided between the water inlet (304) and the water outlet (104). A one-way valve (501) is provided at the end of the return pipe (5) near the water storage tank (3). A capillary water guiding structure is provided between the moisture equalization plate (2) and the water storage tank (3).

2. The curing device for recycled C50 concrete from construction waste as described in claim 1, characterized in that: The bottom end of the maintenance cover (1) is fixedly provided with a sealing seat (101), and the bottom of the sealing seat (101) is embedded with a sealing skirt (102) made of rubber material.

3. The curing device for recycled C50 concrete from construction waste as described in claim 1, characterized in that: The four corners of the top of the maintenance cover (1) are all fixed with hanging rings (105).

4. The curing device for recycled C50 concrete from construction waste as described in claim 1, characterized in that: The uniform moisture plate (2) is composed of a thermal insulation cotton layer (201), a metal mesh plate (203) and a non-woven fabric layer (204) bonded together from top to bottom. The bottom of both sides of the uniform moisture plate (2) is provided with a fixing frame (205), which is connected to the top of the curing cover (1) by fixing screws.

5. The curing device for recycled C50 concrete from construction waste as described in claim 4, characterized in that: The capillary water-conducting structure includes a water-conducting belt one (6), a water-conducting belt two (602), and an immersion seat (601), all of which are made of materials with extremely strong capillary water-conducting ability. The immersion seat (601) is located inside the water storage tank (3) and is connected to the top end of the water-conducting belt one (6). The other end of the water-conducting belt one (6) passes through the water storage tank (3) and the curing cover (1) and is connected to the surface of the water-conducting belt two (602). A sealing structure is provided at the connection between the water-conducting belt (6) and the water storage tank (3) and the curing cover (1). The surface of the insulation cotton layer (201) is provided with an embedding groove (202), and the water-conducting belt two (602) is embedded in the embedding groove (202).

6. The curing device for recycled C50 concrete from construction waste as described in claim 1, characterized in that: The top of the mounting frame (4) is fixedly provided with an upper mounting seat (401), which is fixedly connected to the bottom of the water storage tank (3) by mounting bolts. The other end of the mounting frame (4) is fixedly provided with a lower mounting seat (402), which is fixedly connected to one side of the maintenance cover (1) by mounting bolts.

7. The curing device for recycled C50 concrete from construction waste as described in claim 1, characterized in that: The top of the water storage tank (3) is provided with a tank cover (301), which is connected to the top of the water storage tank (3) by fixing bolts, and the surface of the tank cover (301) is provided with a water inlet pipe (302).

8. The curing device for recycled C50 concrete from construction waste as described in claim 1, characterized in that: Both ends of the return pipe (5) are fixed with mounting plates. The mounting plates are connected to the sides of the maintenance cover (1) and the water storage tank (3) by mounting screws, and a sealing gasket is provided on the inner side of the mounting plate.

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