Concrete self-curing device and method of use thereof

Abstract

This invention discloses a concrete self-curing device and its usage method, including an internal curing device, wires, and a controller. The internal curing device is connected to the controller via the wires and is embedded within the concrete block. The advantages of this invention are: by controlling the electromagnetic induction coil and semiconductor cooling chip, the internal temperature of the concrete is reduced in the early stages, preventing early-age cracking; through the electromagnetic induction coil in the device, the controller controls the electromagnetic induction coil to emit a high-frequency alternating electric field, causing the nano-ferric oxide inside the concrete to heat up in the alternating electric field. In cold seasons, this allows the concrete to self-heat, preventing cracking due to freeze-thaw erosion.

Description

Technical Field

[0001] This invention relates to the field of concrete curing device technology, specifically to a concrete self-curing device and its usage method. Background Technology

[0002] Concrete is currently the most widely used and consumed building material. For a long time, concrete has been a commonly used material in construction and has been extensively applied in our production and daily life. However, since concrete was first used in construction projects, a large number of concrete structures have failed prematurely due to various reasons, failing to reach their intended service life. Some of these failures are due to insufficient structural resistance, while others are due to adverse changes in loads. However, the main reason is the inherent deterioration and decreased durability of concrete under adverse environmental conditions.

[0003] In the early stages of concrete pouring, the early hydration process generates a large amount of heat, causing a rapid rise in the internal temperature of the concrete. Concrete is a brittle material, making it highly susceptible to cracking due to this increased hydration temperature. Currently, a common method is to pre-embed cooling water pipes within the concrete. During the early stages of pouring, cooling water is circulated through these pipes to draw out the heat from the concrete, thus achieving cooling. However, cooling water pipes have drawbacks, including complex construction and the risk of breakage during later pouring stages. Furthermore, in high-latitude regions or during cold seasons in low-latitude regions, the freeze-thaw cycle can cause varying degrees of damage to the concrete.

[0004] Therefore, it is necessary to design a concrete self-curing device to solve the defect in the existing technology that the heat of hydration of concrete cannot be reduced when it is poured at an early age, thus causing it to suffer freeze-thaw erosion in cold seasons. Summary of the Invention

[0005] The purpose of this invention is to solve the problem in the prior art that concrete cannot reduce the heat of hydration when poured at an early age, thus causing it to suffer from freeze-thaw erosion in cold seasons.

[0006] This invention is achieved through the following technical solution:

[0007] A concrete self-curing device includes an internal curing device, a wire, and a controller. The internal curing device is connected to the controller via the wire and is embedded in the concrete block.

[0008] The existing technology involves pre-embedding cooling water pipes inside the concrete. In the early stages of concrete pouring, cooling water is introduced into the cooling water pipes to draw out the hydration heat inside the concrete, thereby achieving the purpose of cooling. However, the cooling water pipes have drawbacks such as complex construction process and easy breakage during later pouring.

[0009] This invention adds an internal curing device, wires, and a controller. The internal curing device is connected to the controller via wires and uses the thermoelectric effect to draw out the hydration heat inside the concrete, thereby reducing the internal temperature of the concrete and preventing early-age cracking. In cold seasons, the controller causes the concrete block to heat up in an alternating electric field, preventing the concrete from cracking due to freeze-thaw erosion.

[0010] A preferred embodiment of the present invention is a concrete self-curing device, wherein the internal curing device includes an electromagnetic induction coil, the electromagnetic induction coil is connected to a controller via a first wire, and the concrete block is mixed with nano-ferric oxide.

[0011] The nano-sized iron oxide exhibits a superparamagnetic effect, generating a large eddy current and thus inducing heat in an alternating electric field. By pre-mixing nano-iron oxide into concrete, during cold seasons, the electromagnetic induction coil in the device, controlled by a controller, emits a high-frequency alternating electric field. The nano-iron oxide inside the concrete heats up in this alternating electric field, preventing the concrete from cracking due to freeze-thaw erosion.

[0012] A preferred embodiment of the present invention is a concrete self-curing device, wherein the internal curing device further includes a semiconductor refrigeration chip, the semiconductor refrigeration chip being disposed in the middle of an electromagnetic induction coil, and the semiconductor refrigeration chip being connected to a controller via a second wire;

[0013] The electromagnetic induction coil is arranged around the semiconductor cooling chip, which serves to protect the semiconductor cooling chip. In the internal curing device, the semiconductor cooling chip with thermoelectric effect is activated by the controller when the concrete is freshly poured due to the large heat of hydration. The thermoelectric effect is used to expel the heat of hydration from the inside of the concrete, thereby reducing the internal temperature of the concrete and preventing early-age cracking.

[0014] In a preferred embodiment of the present invention, a concrete self-curing device is provided, wherein the controller is placed outside the concrete block;

[0015] The controller is placed outside the concrete block for easy operation.

[0016] The present invention provides a preferred concrete self-curing device, wherein the particle size of the nano-ferric oxide is 20-30 nm;

[0017] The nano-iron oxide has a particle size of 20-30 nm and exhibits superparamagnetism.

[0018] The present invention provides a preferred embodiment of a concrete self-curing device, wherein the high-frequency alternating electric field excited by the electromagnetic induction coil has an oscillation frequency of 20-30KHz;

[0019] When the size of the magnetic iron oxide is smaller than the critical size (30nm), the magnetic iron oxide with a single domain structure exhibits a superparamagnetic effect, which can generate heat in a high-frequency alternating electric field. In order to ensure sufficient thermal efficiency, the high-frequency alternating electric field excited by the electromagnetic induction coil has an oscillation frequency of 20-30KHz.

[0020] In a preferred embodiment of the present invention, the internal resistance of the semiconductor refrigeration chip must be ≤1.5Ω and the refrigeration power must be ≥200W.

[0021] A method for using a concrete self-curing device includes the following steps:

[0022] S1: Add 0.1%-0.5% by mass of nano-ferric oxide when mixing concrete;

[0023] S2: Connect the electromagnetic induction coil to the first wire, connect the semiconductor cooling chip to the second wire, and place them inside the already mixed concrete. Lead out the first wire and the second wire and connect them to the controller to pour concrete and form a concrete block.

[0024] S3: After the concrete is poured, the semiconductor cooling chip is turned on by the controller. The semiconductor cooling chip uses the thermoelectric effect to draw out the heat of hydration inside the concrete block, thereby reducing the internal temperature of the concrete and preventing early-age cracking.

[0025] S4: When the cold season or cold wave arrives, the controller turns on the electromagnetic induction coil to generate a high-frequency alternating electric field. The nano-ferric oxide inside the concrete begins to heat up under the excitation of the alternating electric field. By pre-mixing nano-ferric oxide into the concrete, during the cold season, the controller controls the electromagnetic induction coil in the device to emit a high-frequency alternating electric field. The nano-ferric oxide inside the concrete heats up in the alternating electric field, preventing the concrete from cracking due to freeze-thaw erosion.

[0026] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0027] 1. The present invention provides a concrete self-curing device, which controls an electromagnetic induction coil and a semiconductor cooling chip to reduce the internal temperature of the concrete in the early stage, thereby preventing the concrete from cracking in the early stage.

[0028] 2. The present invention provides a concrete self-curing device. Through the electromagnetic induction coil in the device, the controller controls the electromagnetic induction coil to emit a high-frequency alternating electric field. The nano-iron oxide inside the concrete heats up in the alternating electric field. In the cold season, the concrete can self-heat and prevent the concrete from cracking due to freeze-thaw erosion. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of a concrete self-curing device.

[0031] Figure 2 This is a schematic diagram of the internal structure of the internal curing device.

[0032] 1-First wire, 2-Controller, 3-Electromagnetic induction coil, 4-Semiconductor cooling chip, 5-Internal curing device, 6-Second wire, 7-Concrete block. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are only for explaining this invention and are not intended to limit this invention.

[0034] Example 1

[0035] like Figure 1 and Figure 2 As shown, the present invention is a concrete self-curing device, including an internal curing device 5, a wire and a controller 2. The internal curing device 5 is connected to the controller 2 through the wire, and the internal curing device 5 is built into the concrete block 7.

[0036] Example 2

[0037] like Figure 1 and Figure 2 As shown, this embodiment is based on embodiment 1. The internal curing device 5 includes an electromagnetic induction coil 3, which is connected to the controller 2 via a first wire 1. The concrete block 7 is mixed with nano-ferric oxide. The nano-ferric oxide has a superparamagnetic effect and generates a large eddy current in an alternating electric field, thus generating heat. By pre-mixing nano-ferric oxide into the concrete, during the cold season, the electromagnetic induction coil 3 in the device is controlled by the controller 2 to emit a high-frequency alternating electric field. The nano-ferric oxide inside the concrete heats up in the alternating electric field, preventing the concrete from cracking due to freeze-thaw erosion.

[0038] The internal curing device 5 also includes a thermoelectric cooler 4, which is disposed in the middle of the electromagnetic induction coil 3. The thermoelectric cooler 4 is connected to the controller 2 via a second wire 6. The electromagnetic induction coil 3 surrounds the thermoelectric cooler 4, thus protecting it. When the concrete is first poured, the thermoelectric cooler 4, which has a thermoelectric effect, generates a large amount of heat of hydration. The controller 2 activates the cooler to draw out the heat of hydration from the concrete, reducing the internal temperature and preventing early-age cracking.

[0039] The controller 2 is placed outside the concrete block 7; the controller 2 is placed outside the concrete block 7 for easy operation; the nano-iron oxide has a particle size of 20-30 nm; the nano-iron oxide has a particle size of 20-30 nm and has superparamagnetism.

[0040] The high-frequency alternating electric field excited by the electromagnetic induction coil 3 has an oscillation frequency of 20-30KHz. When the size of the magnetic iron oxide is smaller than the critical size (30nm), the magnetic iron oxide with a single domain structure exhibits a superparamagnetic effect, which can generate heat in the high-frequency alternating electric field. In order to ensure sufficient thermal efficiency, the high-frequency alternating electric field excited by the electromagnetic induction coil 3 has an oscillation frequency of 20-30KHz.

[0041] The internal resistance of the semiconductor cooling chip 4 must be ≤1.5Ω, and the cooling power must be ≥200W.

[0042] Example 3

[0043] like Figure 1 and Figure 2 As shown, this embodiment, based on Embodiments 1 and 2, describes a method for using a concrete self-curing device, including the following steps:

[0044] S1: Add 0.1% by mass of nano-ferric oxide when mixing concrete;

[0045] S2: Connect the electromagnetic induction coil 3 to the first wire 1, connect the semiconductor cooling chip 4 to the second wire 6, and place them inside the already mixed concrete. Lead out the first wire 1 and the second wire 6 and connect them to the controller 2 to pour concrete and form a concrete block 7.

[0046] S3: After the pouring is completed, the semiconductor cooling chip 4 is turned on by the controller 2. The semiconductor cooling chip 4 uses the thermoelectric effect to draw out the heat of hydration inside the concrete block 7, thereby reducing the internal temperature of the concrete and preventing early-age cracking.

[0047] S4: When the cold season or cold wave arrives, the controller 2 turns on the electromagnetic induction coil 3 to generate a high-frequency alternating electric field. The nano-iron oxide inside the concrete begins to heat up under the excitation of the alternating electric field. By pre-mixing nano-iron oxide into the concrete, during the cold season, the electromagnetic induction coil 3 in the device, controlled by the controller 2, emits a high-frequency alternating electric field. The nano-iron oxide inside the concrete heats up in the alternating electric field, preventing the concrete from cracking due to freeze-thaw erosion.

[0048] Example 4

[0049] like Figure 1 and Figure 2 As shown, unlike Example 3, a method for using a concrete self-curing device includes the following steps:

[0050] S1: Add 0.5% by mass of nano-ferric oxide when mixing concrete;

[0051] S2: Connect the electromagnetic induction coil 3 to the first wire 1, connect the semiconductor cooling chip 4 to the second wire 6, and place them inside the already mixed concrete. Lead out the first wire 1 and the second wire 6 and connect them to the controller 2 to pour concrete and form a concrete block 7.

[0052] S3: After the pouring is completed, the semiconductor cooling chip 4 is turned on by the controller 2. The semiconductor cooling chip 4 uses the thermoelectric effect to draw out the heat of hydration inside the concrete block 7, thereby reducing the internal temperature of the concrete and preventing early-age cracking.

[0053] S4: When the cold season or cold wave arrives, the controller 2 turns on the electromagnetic induction coil 3 to generate a high-frequency alternating electric field. The nano-iron oxide inside the concrete begins to heat up under the excitation of the alternating electric field. By pre-mixing nano-iron oxide into the concrete, during the cold season, the electromagnetic induction coil 3 in the device, controlled by the controller 2, emits a high-frequency alternating electric field. The nano-iron oxide inside the concrete heats up in the alternating electric field, preventing the concrete from cracking due to freeze-thaw erosion.

[0054] Depending on the size of the concrete block, several concrete self-curing devices can be installed.

[0055] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An application of a concrete self-curing device, characterized in that, It includes an internal curing device (5), wires and a controller (2), the internal curing device (5) being connected to the controller (2) via wires, and the internal curing device (5) being built into the concrete block (7); The internal curing device (5) includes an electromagnetic induction coil (3), which is connected to a controller (2) via a first wire (1). The concrete block (7) is mixed with nano-ferric oxide; the nano-ferric oxide has a particle size of 20-30 nm. Place The nano-ferric oxide is dispersed in concrete during mixing; The controller is used to control the electromagnetic induction coil to change the surrounding magnetic field, so that the nano-iron oxide is induced to heat up due to eddy currents. The internal maintenance device (5) also includes a semiconductor cooling chip (4), which is disposed in the middle of the electromagnetic induction coil (3) and is connected to the controller (2) through a second wire (6).

2. The application of the concrete self-curing device according to claim 1, characterized in that, The controller (2) is placed outside the concrete block (7).

3. The application of the concrete self-curing device according to claim 1, characterized in that, The high-frequency alternating electric field excited by the electromagnetic induction coil (3) has an oscillation frequency of 20-30KHz.

4. The application of the concrete self-curing device according to claim 1, characterized in that, The internal resistance of the semiconductor cooling chip (4) must be ≤1.5Ω and the cooling power must be ≥200W.

5. A method of using a concrete self-curing device as described in any one of 1-4, characterized in that, Includes the following steps: S1: Add 0.1%-0.5% by mass of nano-ferric oxide when mixing concrete; S2: Connect the electromagnetic induction coil (3) to the first wire (1), connect the semiconductor cooling chip (4) to the second wire (6), and place them inside the already mixed concrete. Lead out the first wire (1) and the second wire (6) and connect them to the controller (2) to pour concrete and form a concrete block (7). S3: After the pouring is completed, the semiconductor cooling chip (4) is turned on by the controller (2). The semiconductor cooling chip (4) uses the thermoelectric effect to draw out the hydration heat inside the concrete block (7). S4: When the cold season or cold wave arrives, the controller (2) turns on the electromagnetic induction coil (3) to generate a high-frequency alternating electric field. The nano-iron oxide inside the concrete begins to generate heat under the excitation of the alternating electric field, achieving the effect of self-heating of the concrete.

Images