Method for forming bubbles to harden building material by using hydrate method
The carbohydrate is crushed into hydrate particles by the hydrate method, mixed with cement quick-setting agent and heated to form bubble hardened building materials, solving the problems of high cost, difficult operation and low cost performance in traditional methods, and achieving efficient and economical preparation of building materials.
Patent Information
- Application Number
- CN202510222252.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-04-22
AI Technical Summary
The existing carbon dioxide capture and storage methods are costly and difficult to operate, and the traditional bubble concrete preparation process has the problem of low cost performance of materials.
The carbohydrate is crushed into hydrate particles by the hydrate method, mixed with cement quick-setting agent and heated to form bubble hardened building materials. This method improves the cost-effectiveness of the material by forming bubbles inside the building material by hydrate particles.
It has achieved the preparation of bubble hardened building materials under conventional commercial cold storage environment conditions. The materials have good physical and mechanical properties, strong adaptability, easy construction, and improved the insulation performance and toughness of the materials.
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Figure CN119858225A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of new materials, and in particular to a method for forming bubble-hardened building materials by utilizing a hydrate method. Background Art
[0002] Carbon dioxide capture technology refers to the process of separating and purifying carbon dioxide from emission sources. Traditional capture methods can generally be divided into pre-combustion capture, oxygen-enriched combustion, chemical chain combustion capture and post-combustion capture technology. Post-combustion capture is a relatively efficient and economical method, which usually requires the use of solid or liquid solvents to separate carbon dioxide. Currently, common carbon dioxide separation technologies include chemical absorption, physical absorption, adsorption, membrane separation and cryogenic distillation. Among them, the chemical absorption method is relatively mature and suitable for states where the carbon dioxide concentration is not high and the pressure is normal, but the amount of absorbent used is large, and it needs to be replenished during the circulation process. The reagent requirements are high, and its regeneration process has high energy consumption. Although the membrane separation method has a simple process and is easy to operate, it has high requirements for raw gas, and requires pretreatment, dehydration and filtration, and the purity of the obtained product is not high.
[0003] In recent years, a new hydrate capture and separation method has emerged, that is, the use of gas hydrate method to recover and store carbon dioxide technology. Compared with traditional separation methods, it can greatly reduce separation costs while effectively improving separation efficiency.
[0004] At present, the medium used in hydrate carbon capture technology is mainly pure water or solution system. Pure water or solution system is usually used as the base medium for hydrate formation reaction, and mechanical strengthening and chemical and physical strengthening are used to enhance the solubility of carbon dioxide gas in the liquid phase system, convert carbon dioxide into hydrates, and confine it in solid hydrates. The commonly used mechanical strengthening process is mainly achieved by increasing the gas-liquid contact area, such as stirring, bubbling, spraying, and spraying. Through a series of external environmental disturbances, the mass transfer and heat transfer efficiency of hydrates can be increased, thereby increasing the hydrate formation rate.
[0005] Currently available carbon dioxide storage methods usually consider underground or submarine environments, and the use of large-scale injection into deep depths means that the carbon dioxide gas storage and injection equipment requires high costs, the technical cost of carbon dioxide storage is high, and the engineering operation is difficult, which increases the overall process cost. Summary of the invention
[0006] The purpose of this application is to provide a method for forming bubble-hardened building materials using the hydrate method. This method uses hydrate particles to form bubbles inside the building materials. The prepared building materials will have the good physical and mechanical properties of ordinary bubble concrete, thereby improving the cost-effectiveness of bubble concrete.
[0007] In order to achieve the above object, the present invention provides a method for forming a bubble hardening building material using a hydrate method, the method comprising:
[0008] S1: crushing carbon dioxide hydrate into hydrate particles;
[0009] S2: uniformly mixing and compacting the hydrate particles and cement accelerating agent to form a mixture;
[0010] S3: The mixture is heated to decompose the hydrate particles in the mixture into carbon dioxide and liquid water. The liquid water reacts with the cement accelerator to form a hardened cement material. The overflowed carbon dioxide forms bubbles in the hardened cement material.
[0011] In an optional embodiment, S1 includes:
[0012] A hydrate preparation device is used to prepare bulk carbon dioxide hydrate;
[0013] Fully freezing the blocky carbon dioxide hydrate in a cold storage to make the carbon dioxide hydrate fully stable;
[0014] The carbon dioxide hydrate block is crushed and kneaded in a cold storage, and then a porous sieve is used to screen out uniform hydrate particles for use.
[0015] In an optional embodiment, S2 includes:
[0016] In the cold storage, the hydrate particles are uniformly mixed with the cement accelerating agent to form a mixture;
[0017] The mixture was packed into aluminum boxes for compaction.
[0018] In an optional embodiment, S3 includes:
[0019] A heating plate is fixedly installed around the outside of the aluminum box containing the mixture;
[0020] Adjust the temperature of the heating plate to 60°C to 70°C and continue heating for 1.5min to 2.5min.
[0021] In an optional embodiment, the temperature of the heating plate is adjusted to 60° C. to 70° C., and the heating is continued for 1.5 min to 2.5 min, comprising:
[0022] The temperature of the hot plate was adjusted to 65°C and heating was continued for 2 min.
[0023] In an optional embodiment, the method further comprises:
[0024] S4: Firing and hardening cement material.
[0025] In an optional embodiment, S4 includes:
[0026] The hardened cement material is fired at 1250°C to enhance the hardness of the material.
[0027] Through the above technical scheme, the hydrate particles and the cement accelerator are directly mixed in a solid-solid manner to bring the high-density carbon dioxide gas trapped in the hydrate particles into the cement material. When the cement accelerator is thermally excited and begins to harden, it releases heat. The released heat can promote the decomposition of the hydrate particles, releasing carbon dioxide and liquid water. The liquid water in turn promotes the hardening process of the cement accelerator. Through this mutually reinforcing chain reaction process, the cement accelerator is eventually completely hardened and quickly seals the carbon dioxide in the form of fine bubbles in the hardened cement material. Therefore, the new building material prepared by this method has the significant advantages of strong adaptability and convenient construction.
[0028] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0030] Figure 1 A flow chart of a method for forming a bubble building material using a hydrate method provided in an embodiment of the present application;
[0031] Figure 2 This is a physical picture of carbon dioxide hydrate after it is fully frozen in a cold storage;
[0032] Figure 3 This is a physical picture of the hydrate particles screened out;
[0033] Figure 4 A physical picture of the hardened cement material produced;
[0034] Figure 5 This is a physical picture of the hardened cement material after firing. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0036] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0037] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0038] The existing bubble concrete technology usually uses a mechanical method to prepare a foaming agent aqueous solution into foam, and then adds the foam into a slurry composed of silicon materials, calcium materials, water and various admixtures, and then mixes, pours, and cures to form a bubble material. Since the foamed concrete contains a large number of closed pores, it has the following good physical and mechanical properties: the formed concrete is light, has good thermal insulation performance, good sound insulation and fire resistance, good overall performance, strong waterproof performance, good durability, convenient production and processing, good environmental protection performance, convenient construction, high compressive strength, good impact energy absorption performance, can make large amounts of industrial waste residues, and low price.
[0039] The foaming agent used in the preparation technology of bubble concrete is usually called cement foaming agent, also known as foam concrete foaming agent. It refers to an admixture that can reduce the surface tension of the liquid and produce a large amount of uniform and stable foam for the production of foam concrete. Foaming agent is a type of substance that can produce a large amount of foam in its aqueous solution when air is introduced into it by mechanical force. This type of substance is surfactant or surface active substance. The essence of foaming agent is its surface activity. Without surface activity, it cannot foam, and it cannot become a foaming agent. Surface activity is the core of foaming.
[0040] In actual application, the foaming agent is usually operated under normal temperature and pressure conditions. The bubble density produced under this condition is relatively low. In addition, air bubbles are mainly formed inside the concrete.
[0041] Please refer to Figure 1This embodiment provides a method for forming bubble-hardened building materials using the hydrate method (hereinafter referred to as the method), which uses hydrate particles to form bubbles inside the building materials. The prepared building materials will have the good physical and mechanical properties of ordinary bubble concrete, thereby improving the cost-effectiveness of bubble concrete.
[0042] The method comprises the following steps:
[0043] S1: crushing carbon dioxide hydrate into hydrate particles.
[0044] Specifically, first, a block of carbon dioxide hydrate is prepared by using a hydrate preparation device, and the chemical formula is as follows: CO2+5.75H2O→CO2·5.75H2O. It can be seen that carbon dioxide hydrate contains rich carbon dioxide, and the mass ratio of carbon dioxide content is 30%; then, the block of carbon dioxide hydrate is fully frozen in a cold storage to make the carbon dioxide hydrate fully stable, such as Figure 2 As shown, the temperature of the cold storage is less than -5°C, and the carbon dioxide hydrate has a self-protection function in this low temperature environment and can stably maintain a solid state; finally, the blocky carbon dioxide hydrate is pressed and crushed in the cold storage, and then a porous screen is used to screen out uniform hydrate particles for use, as shown in FIG. Figure 3 shown.
[0045] S2: The hydrate particles and cement accelerator are uniformly mixed and compacted to form a mixture.
[0046] Specifically, first, in a cold storage, the hydrate particles are uniformly mixed with cement accelerator to form a mixture; then, the mixture is packed into an aluminum box for compaction. Since this process is carried out in a cold storage at a temperature below -5°C, the hydrate particles remain stable throughout the mixing process without decomposition.
[0047] S3: The mixture is heated to decompose the hydrate particles in the mixture into carbon dioxide and liquid water. The liquid water reacts with the cement accelerator to form a hardened cement material. The overflowed carbon dioxide forms bubbles in the hardened cement material.
[0048] Specifically, first, a heating plate is fixedly installed around the outside of the aluminum box containing the mixture, wherein the maximum heating temperature of the heating plate can reach 150°C; then, the temperature of the heating plate is adjusted to 60°C to 70°C, preferably 65°C, and the heating is continued for 1.5min to 2.5min, preferably 2min.
[0049] During the heating process of the mixture, the hydrate particles evenly distributed in the mixture will decompose due to the heat to form carbon dioxide and liquid water. Since the carbon dioxide is released by the decomposition of tiny hydrate particles, the carbon dioxide bubbles formed by the decomposition and release are uniform in size and fine in scale. The liquid water released by the decomposition is fully absorbed by the cement accelerator and used in its hardening process. The hardening process of the cement accelerator releases heat, which in turn promotes the decomposition reaction of the hydrate particles and further releases carbon dioxide and liquid water.
[0050] Therefore, when the mixture of hydrate particles and cement accelerator is heated at 65℃ for 2 minutes, the process of hydrate particle decomposition → cement accelerator hardening will continue in a cycle until all hydrate particles are decomposed into carbon dioxide and liquid water, and the generated liquid water is fully used for the hardening of cement accelerator. In this way, the decomposition → hardening process will finally stop. When the entire decomposition and hardening cycle inside the aluminum box is completely completed, a hardened cement material containing bubbles can be obtained, such as Figure 4 , i.e., bubble-hardening building materials, wherein the pores of the bubble-hardening building materials mainly contain carbon dioxide gas.
[0051] S4: Firing and hardening cement material.
[0052] Specifically, firing the hardened cement material at 1250°C can further enhance the hardness of the material without losing the pore density and size characteristics inside the material, and ultimately obtain a high-temperature resistant bubble-hardening building material, such as Figure 5 shown.
[0053] In summary, the core solution of this embodiment is to use a solid-solid direct mixing method between hydrate particles and cement accelerator to bring high-density carbon dioxide gas trapped in hydrate particles into cement material. The whole process is carried out in a low-temperature environment of less than -5°C, so that the hydrate particles will not decompose during the whole material mixing process, ensuring the stability of the high-density gas in its structure. When the cement accelerator is thermally stimulated and begins to harden, it will release heat. The released heat can promote the decomposition of hydrate particles, release carbon dioxide and liquid water, and the liquid water promotes the hardening process of the cement accelerator. Through this mutually reinforcing chain reaction process, the cement accelerator will eventually harden completely and quickly seal the carbon dioxide in the hardened cement material in the form of fine bubbles.
[0054] The beneficial effects of the method for forming bubble-hardened building materials using the hydrate method provided in this embodiment include:
[0055] High-density carbon dioxide fine bubbles can be formed in cement materials, and the bubble distribution can be uniform and the outer diameter can be small. In addition, cement accelerator has the characteristics of releasing a large amount of heat and hardening quickly. The chain reaction process of cement accelerator hardening → hydrate particle decomposition → cement accelerator hardening can be started by local high-temperature thermal excitation. Therefore, the new building material prepared by this method has the significant advantages of strong adaptability and convenient construction.
[0056] A large amount of carbon dioxide is sealed in the form of microbubbles in building materials, and the carbon dioxide bubbles formed after the sealing are used to improve the thermal insulation performance of the building materials. The heterogeneous structure around the bubbles is used to increase the toughness and corrosion resistance of the building materials, thereby preparing green and environmentally friendly building materials with carbon dioxide sealing function, thermal insulation and noise reduction performance, and toughness enhancement function.
[0057] In addition, the present method can complete the entire preparation process under conventional commercial cold storage environment conditions, is simple to operate and has low requirements for infrastructure and equipment, and can also overcome the disadvantage that ordinary building materials cannot be constructed in a low temperature environment below zero degrees.
[0058] Using fast-setting cement accelerator as the base material can achieve rapid setting and solidification of the material within a few minutes, greatly improving the environmental adaptability and construction efficiency of new building materials and improving the economy of the materials during the construction process.
[0059] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.
[0060] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A method for forming a bubble-hardening building material using a hydrate method, characterized in that: The method comprises: S1: crushing carbon dioxide hydrate into hydrate particles; S2: uniformly mixing and compacting the hydrate particles and cement accelerating agent to form a mixture; S3: heating the mixture so that the hydrate particles in the mixture decompose carbon dioxide and liquid water, the liquid water reacts with the cement accelerator to form a hardened cement material, and the overflowed carbon dioxide forms bubbles in the hardened cement material.
2. The method for forming bubble-hardening building materials by hydrate method according to claim 1, characterized in that: S1 includes: Using a hydrate preparation device to prepare the carbon dioxide hydrate in block form; Fully freezing the block-shaped carbon dioxide hydrate in a cold storage to make the carbon dioxide hydrate fully stable; The carbon dioxide hydrate in block form is crushed and kneaded in a cold storage, and then a porous sieve is used to sieve out uniform hydrate particles for later use.
3. The method for forming bubble-hardening building materials by hydrate method according to claim 1, characterized in that S2 include: In the cold storage, the hydrate particles are uniformly mixed with the cement accelerating agent to form a mixture; The mixture was packed into aluminum boxes for compaction.
4. The method for forming bubble-hardening building materials by hydrate method according to claim 3, characterized in that S3 include: A heating plate is fixedly installed around the outside of the aluminum box containing the mixture; Adjust the temperature of the heating plate to 60°C to 70°C and continue heating for 1.5min to 2.5min.
5. The method for forming bubble-hardening building materials by hydrate method according to claim 4, characterized in that: The step of adjusting the temperature of the heating plate to 60° C. to 70° C. and continuously heating for 1.5 min to 2.5 min comprises: The temperature of the hot plate was adjusted to 65°C and heating was continued for 2 min.
6. The method for forming bubble-hardening building materials by hydrate method according to claim 1, characterized in that: The method further comprises: S4: Firing the hardened cement material.
7. The method for forming bubble-hardening building materials by hydrate method according to claim 6, characterized in that: S4 includes: The hardened cement material is fired at 1250°C to enhance the hardness of the material.