Concrete formwork system with temperature indication function and easy-to-disassemble characteristic as well as preparation method and application of concrete formwork system

Abstract

The invention relates to a concrete formwork system with a temperature indication function and an easy-to-disassemble characteristic and a preparation method and application of the concrete formwork system. The concrete formwork system comprises a plurality of thermochromic concrete unit modules and a connecting agent for connecting the thermochromic concrete unit modules; the thermochromic concrete unit module is composed of a concrete base material and a reversible thermochromic part embedded in the surface of the concrete base material. Compared with the prior art, the concrete formwork system prepared by the invention has the advantages of temperature indication function, easy disassembly characteristic, high-precision forming, modular design and connection and the like.

Description

Technical Field

[0001] The invention relates to the technical field of concrete engineering, and in particular to a concrete formwork system with a temperature indication function and easy-to-dismantle characteristics, and a preparation method and application thereof. Background Art

[0002] At present, the commonly used formwork materials in concrete engineering are mainly wood, steel and plastic. These materials have their own advantages and disadvantages, but in the concrete pouring of complex structures, wooden formwork is light, easy to process, and low in cost, but has poor durability, limited reuse times, and is prone to deformation and rot in humid environments. Steel formwork has high strength, good durability, and is suitable for repeated use, but it is heavy, inconvenient to carry and install, difficult to process complex shapes, and has high cost. Plastic formwork is light, corrosion-resistant, and reusable, but its strength and rigidity are relatively low, it is easy to deform at high temperatures, and is not suitable for high-strength concrete pouring.

[0003] The concrete formwork in the prior art also has the following limitations:

[0004] (1) Poor temperature adaptability: It cannot indicate whether the ambient temperature is suitable for concrete pouring, which affects the quality of concrete.

[0005] (2) Difficulty in removing the formwork: In concrete projects with complex structures, it is difficult to remove the formwork, which can easily damage the concrete surface. The removal process is often accompanied by noise, dust, and pollution, which is not conducive to environmental protection and improvement of working conditions.

[0006] (3) Complex structures are difficult to form: Existing formwork materials lack precision when making complex shapes, which affects the quality of the final concrete structure. Summary of the invention

[0007] The purpose of the present invention is to overcome the above difficulties and provide a concrete formwork system with temperature indication function and easy-to-dismantle characteristics, as well as a preparation method and application thereof.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] One of the technical solutions of the present invention is to provide a concrete formwork system, including a plurality of thermochromic concrete unit modules and a connecting agent connecting the thermochromic concrete unit modules, wherein the thermochromic concrete unit modules are composed of a concrete substrate and a reversible thermochromic part embedded in the surface of the concrete substrate.

[0010] In some specific embodiments, the reversible thermochromic portion includes a microencapsulated reversible thermochromic substance and a composite substrate.

[0011] In some specific embodiments, the microencapsulated reversible thermochromic material is a material that changes color when the temperature is below 5° C. and / or above 31° C. Exemplarily, the reversible thermochromic material can be selected to change color at two specific temperatures, and the color changes do not overlap, such as at low temperatures, a "colored-colorless" transition.

[0012] In some specific implementations, the connecting agent includes resin sand and a curing agent, and the resin sand is resin sand that dissolves in high temperature.

[0013] In some specific embodiments, the resin sand is resin sand dissolved in a solution above 95°C.

[0014] A second technical solution of the present invention is to provide a method for preparing a concrete formwork system as described in one of the above technical solutions, comprising the following steps:

[0015] S1. preparing a reversible thermochromic part: mixing a gastric encapsulated reversible thermochromic substance and a composite substrate, and extruding and drawing the mixture into a reversible thermochromic filament by using 3D printing technology;

[0016] S2. Preparation of thermochromic concrete unit module: using 3D printing technology to prepare a concrete substrate, and inlaying the reversible thermochromic filament prepared in step S1 during the printing process;

[0017] S3. Connection of the thermochromic concrete unit modules: Every two thermochromic concrete unit modules are connected by curing with a connecting agent to obtain a concrete formwork system.

[0018] In some specific embodiments, in step S1, the extrusion temperature is 180-230°C.

[0019] In some specific embodiments, in step S3, the curing temperature is 10-50°C and the curing time is 10-48h.

[0020] A third technical solution of the present invention is to provide an application of a concrete formwork system as described in one of the above technical solutions, wherein the concrete formwork system is applied in concrete buildings.

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

[0022] (1) Temperature indication function: The concrete formwork system of the present invention has a thermochromic property and can present different color changes at different temperatures, thus acting as a temperature indicator. By comparing the color with that at room temperature, construction personnel can intuitively judge whether the ambient temperature is suitable for concrete pouring and curing.

[0023] (2) Easy disassembly: After the concrete formwork system of the present invention comes into contact with hot water (about 95 degrees Celsius), the resin sand in the connector melts into liquid, so that the concrete formwork system can be automatically disassembled into unit modules. This feature eliminates the traditional destructive demoulding process, bringing convenience and safety to the construction process.

[0024] (3) High-precision molding: The present invention uses additive manufacturing technology to make unit modules, which can achieve high-precision, complex-shaped formwork manufacturing. This method allows the formwork to be customized according to specific engineering requirements, further improving construction efficiency and the accuracy of concrete structures.

[0025] (4) Modular design and connection: The present invention uses a connector to tightly fix multiple unit modules together, which can improve the stability and accuracy of the formwork system. At the same time, the modular design can greatly reduce the time of assembly and disassembly, further improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of cured resin sand dissolving in hot water above 95°C. DETAILED DESCRIPTION

[0027] The present invention provides a concrete formwork system which is easy to dismantle, easy to assemble, has strong versatility, high surface flatness, high precision, simple operation, low cost, and can realize centralized production in a factory.

[0028] The concrete formwork system comprises a plurality of thermochromic concrete unit modules and a connecting agent for connecting the thermochromic concrete unit modules. The thermochromic concrete unit modules are composed of a concrete base material and a reversible thermochromic part embedded in the surface of the concrete base material.

[0029] Preferably, the concrete substrate may be in the shape of a cuboid, with a length ranging from 600 mm to 1500 mm, a width ranging from 300 mm to 800 mm, and a height ranging from 50 mm to 400 mm; and a thickness of the concrete substrate ranging from 20 mm to 30 mm.

[0030] Furthermore, the reversible thermochromic portion includes a microencapsulated reversible thermochromic substance and a composite substrate.

[0031] Furthermore, the microencapsulated reversible thermochromic substance is a material that changes color when the temperature is lower than 5°C and / or higher than 31°C.

[0032] When the temperature is below 5°C, the reversible thermochromic substance can change from colored to colorless; when the temperature is above 31°C, the reversible thermochromic substance can change from one color to another. This function enables construction workers to intuitively judge whether the ambient temperature is suitable for concrete pouring and curing, thereby avoiding insufficient strength caused by low temperature and shrinkage cracks caused by high temperature. The formwork materials in the prior art do not have a temperature indication function and cannot provide a temperature reference for the construction process, which may cause concrete quality problems.

[0033] Furthermore, the composite substrate is selected from ABS or PLA.

[0034] Furthermore, the connecting agent includes resin sand, curing agent, etc., and the resin sand is high-temperature soluble resin sand.

[0035] Furthermore, the resin sand is resin sand dissolved in a solution above 95°C.

[0036] When poured with hot water over 95°C, the resin in the sand mold will dissolve, turning the sand mold into loose sand, making it easier for construction workers to quickly and safely remove the concrete formwork system without damaging the concrete surface. This feature is particularly suitable for complex concrete structures or areas that are difficult to remove. Formwork materials in the prior art usually need to be removed mechanically or manually, which is not only time-consuming and labor-intensive, but may also damage the concrete surface.

[0037] The present invention also provides a method for preparing a concrete formwork system, comprising the following steps:

[0038] S1. preparing a reversible thermochromic part: mixing a gastric encapsulated reversible thermochromic substance and a composite substrate, and extruding and drawing the mixture into a reversible thermochromic filament by using 3D printing technology;

[0039] S2. Preparation of thermochromic concrete unit module: using 3D printing technology to prepare a concrete substrate, and inlaying the reversible thermochromic filament prepared in step S1 during the printing process;

[0040] S3. Connection of the thermochromic concrete unit modules: Every two thermochromic concrete unit modules are connected by curing with a connecting agent to obtain a concrete formwork system.

[0041] Furthermore, in step S1, the extrusion temperature is 180-230°C.

[0042] Furthermore, in step S3, the curing temperature is 10-50°C, and the curing time is 10-48h.

[0043] The present invention can improve construction quality, efficiency and safety. Through the temperature indication function, construction personnel can monitor and adjust the construction environment in real time to ensure that the concrete is poured and cured under the most suitable temperature conditions, thereby improving the overall quality of the concrete. The easy-to-remove feature makes the removal of the concrete formwork system more convenient, reduces construction time and labor costs, and avoids damage to the concrete surface during the demolding process, thereby improving construction efficiency. The melting and easy-to-remove feature reduces the operational risks of construction personnel during the demolding process and improves the safety of the construction site.

[0044] The unit modules made using additive manufacturing technology can be reused, reducing the waste and cost of formwork materials, and have high environmental and economic benefits. Additive manufacturing technology also allows customized formwork design, which can meet the construction needs of concrete structures of various complex shapes and improve the design flexibility and precision of the project. The use of unit modules simplifies the production and transportation process, while the connector provides the ability to easily disassemble and reassemble, further improving the flexibility and efficiency of construction.

[0045] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0046] In the following examples, unless otherwise specified, raw materials or processing techniques are conventional commercially available raw materials or conventional processing techniques in the art.

[0047] Embodiment 1:

[0048] This embodiment provides a concrete formwork system, and the preparation method thereof comprises the following steps:

[0049] (1) Material selection and configuration:

[0050] Reversible thermochromic substances such as microencapsulated reversible thermochromic substances (thermosensitive pigments) that change from colored to colorless at over 5°C and from green to yellow at over 31°C are selected respectively, PLA is selected as the base material, and high-temperature soluble resin sand such as a mixture of zircon sand and hydrogen phosphate, and quartz resin sand.

[0051] (2) Preparation of thermochromic concrete unit module:

[0052] The shape and size of the concrete formwork are designed using computer-aided design (CAD) software, and the thermochromic concrete unit module is designed according to engineering requirements. The thermochromic concrete unit module consists of a concrete substrate and a reversible thermochromic part embedded in the surface of the concrete substrate.

[0053] The reversible thermochromic material and PLA are mixed, extruded and drawn into reversible thermochromic filaments by 3D printing technology, and the extrusion temperature is about 200°C.

[0054] Similarly, the concrete substrate is prepared by 3D printing technology, and the reversible thermochromic filament is embedded in the concrete substrate during the printing process.

[0055] (3) Connection of thermochromic concrete unit modules: Every two thermochromic concrete unit modules are connected by a connecting agent and cured at room temperature for 24 hours to obtain a template, wherein the connecting agent is composed of quartz resin sand and silicate adhesive in a mass ratio of 4:1.

[0056] like Figure 1 The figure shows a schematic diagram of the cured connecting agent dissolving in hot water above 95°C.

[0057] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A concrete formwork system, characterized in that: The invention comprises a plurality of thermochromic concrete unit modules and a connecting agent for connecting the thermochromic concrete unit modules. The thermochromic concrete unit modules are composed of a concrete base material and a reversible thermochromic part embedded in the surface of the concrete base material.

2. The concrete formwork system according to claim 1, characterized in that: The reversible thermochromic part includes a microencapsulated reversible thermochromic substance and a composite substrate.

3. The concrete formwork system according to claim 2, characterized in that: The microencapsulated reversible thermochromic substance is a material that changes color when the temperature is lower than 5°C and / or higher than 31°C.

4. The concrete formwork system according to claim 2, characterized in that: The composite substrate is selected from ABS or PLA.

5. The concrete formwork system according to claim 1, characterized in that: The connecting agent comprises resin sand and curing agent, and the resin sand is resin sand that dissolves in high temperature.

6. The concrete formwork system according to claim 5, characterized in that: The resin sand is resin sand dissolved in a solution above 95°C.

7. A method for preparing a concrete formwork system according to any one of claims 1 to 6, characterized in that: The steps include: S1. preparing a reversible thermochromic part: mixing a microencapsulated reversible thermochromic substance and a composite substrate, and extruding and drawing the mixture into a reversible thermochromic filament by using 3D printing technology; S2. Preparation of thermochromic concrete unit module: using 3D printing technology to prepare a concrete substrate, and inlaying the reversible thermochromic filament prepared in step S1 during the printing process; S3. Connection of thermochromic concrete unit modules: Every two thermochromic concrete unit modules are connected by curing with a connecting agent to obtain a concrete formwork system.

8. The preparation method according to claim 7, characterized in that: In step S1, the extrusion temperature is 180-230°C.

9. The preparation method according to claim 7, characterized in that: In step S3, the curing temperature is 10-50°C and the curing time is 10-48h.

10. An application of a concrete formwork as claimed in any one of claims 1 to 6, characterized in that: The concrete formwork system is applied in concrete buildings.

Images