Aluminum powder gas-forming material for aerated concrete and preparation method of aluminum powder gas-forming material

Abstract

The invention discloses an aluminum powder gas-forming material for aerated concrete and a preparation method thereof, and relates to the technical field of aluminum powder gas-forming materials, a screening and mixing device is utilized to ensure uniform mixing and proper granularity of aluminum powder, an active agent calcium oxide and a foam stabilizer calcium silicate, so that uniform proceeding of a subsequent reaction process is ensured; the active agent calcium oxide reacts with the aluminum powder to generate gas, uniform bubbles are formed, the foaming process of the concrete is promoted, the foam stabilizer calcium silicate stabilizes the bubbles, the microstructure of the concrete is enhanced, the compressive strength and durability are improved, and the influence of the active agent calcium oxide and the foam stabilizer calcium silicate on the environment is small. The improved concrete structure provides better heat insulation and sound insulation performance, so that the improved concrete structure is more competitive in construction projects, the designed screening and mixing device achieves automatic, efficient and accurate material screening and mixing, the production efficiency and the product quality are improved, the production process is optimized through the method and equipment design, and the performance and stability of concrete are improved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum powder gas-generating materials, in particular to an aluminum powder gas-generating material for aerated concrete and a preparation method thereof. Background Art

[0002] Aluminum powder gas-forming material in aerated concrete is an important component. It is mainly used to generate bubbles in concrete, thereby reducing the density of concrete and improving its performance. The powder gas-forming material provides key technical support for the production of aerated concrete through its unique foaming mechanism, making it one of the important options in modern building materials.

[0003] Under the existing technology, fine aluminum powder is often used as a gas-generating material added to concrete. The particle size of fine aluminum powder is small and is easily affected by environmental humidity and mixing conditions. Therefore, its foaming effect has a certain degree of uncontrollability, resulting in that fine aluminum powder may cause large fluctuations in the porosity of concrete, making it difficult to accurately control the density and strength of concrete. At the same time, fine aluminum powder requires a longer mixing time to ensure that it can fully exert its gas-generating effect, which will affect the construction operability and workability of concrete. Compared with aluminum powder gas-generating materials containing activators and foam stabilizers, the preparation and use costs of fine aluminum powder are usually higher, which will increase the production cost of concrete. It is necessary to improve the existing technology. To this end, we propose an aluminum powder gas-generating material for aerated concrete and a preparation method thereof to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide an aluminum powder gas-generating material for aerated concrete and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] The aluminum powder gas-generating material for aerated concrete provided by the present invention comprises the following materials by weight: aluminum powder, accounting for 70% to 80% of the total gas-generating material weight;

[0007] Activator calcium oxide, accounting for 16% to 20% by weight of the total gas-generating material;

[0008] The foam stabilizer calcium silicate accounts for 3% to 8% by weight of the total gas-generating material.

[0009] A method for preparing an aluminum powder gas-generating material for aerated concrete, the specific process is as follows:

[0010] S101. Prepare raw materials: aluminum powder accounts for 70% to 80% of the total weight of the foamed concrete, the active agent calcium oxide accounts for 16% to 20% of the total weight of the foamed concrete, and the foam stabilizer calcium silicate accounts for 3% to 8% of the total weight of the foamed concrete.

[0011] S102, mixing raw materials: the raw materials are first placed in a screening and mixing device, and the aluminum powder, the active agent calcium oxide and the foam stabilizer calcium silicate are uniformly mixed and screened by the screening and mixing device to ensure the uniformity and appropriate particle size of the raw materials so that the subsequent reaction process can be carried out uniformly;

[0012] S103, water addition activation: the mixed raw materials are activated by adding water. The addition of water starts the reaction between the activator and the foam stabilizer and the aluminum powder, generating gas to form bubbles, so that the concrete foams;

[0013] S104, Concrete formation: During the activation process, bubbles form tiny pores in the concrete, forming foamed concrete, and the concrete will undergo a preliminary hardening and curing process within a certain period of time;

[0014] S105. Curing: Curing of finished concrete to ensure that the designed strength and durability are achieved.

[0015] Preferably, the screening and mixing device comprises a fixed seat, a mixing component is sleeved inside the fixed seat, a screening component is arranged on the top of the fixed seat, driving components for controlling the working state of the mixing component and the screening component are arranged on both sides of the fixed seat, connecting windows are opened on both sides of the fixed seat, and the connecting windows on both sides are symmetrically distributed along the axis of the fixed seat, the driving component comprises two servo motors, the output end of the servo motor is fixedly connected to a rotating disk, a plurality of push rods are fixedly connected around the rotating disk, and the mixing component comprises a conical seat, the top of the conical seat A connecting ring is sleeved around the part, the inner ring wall of the connecting ring is fixedly connected to the conical seat, the outer ring wall of the connecting ring is provided with a plurality of assembly grooves matching the top rod, the conical seat is sleeved with multiple layers of continuous spiral plates around, the spiral plates are fixedly connected to the conical seat, the surface of the conical support is sleeved with a conical sleeve, the conical sleeve is sleeved on the surface of the spiral plate, and the spiral plate is rotatably connected to the conical sleeve, a continuous spiral channel from top to bottom is formed between the conical seat, the spiral plate and the conical sleeve, and a plurality of toggle plates are built into the spiral channel.

[0016] Preferably, the two servo motors are respectively arranged on both sides of the fixing seat, and the end of the servo motor away from the fixing seat is sleeved with a connecting seat, the connecting seat is fixedly connected to the servo motor, and the end of the connecting seat away from the servo motor is fixedly connected to the outer surface of the fixing seat.

[0017] Preferably, the output end of the servo motor extends through the connecting window to the inner side of the fixing seat, the plurality of push rods are evenly distributed around the axis of the rotating disk, and the output ends of the two servo motors rotate in the same direction.

[0018] Preferably, the middle part of the fixed seat is connected, the fixed seat is sleeved on the surface of the conical seat, the fixed seat is not directly connected to the conical seat, the cone head of the conical seat faces the bottom, a plurality of the assembly grooves are evenly distributed around the axis of the connecting ring, and the push rod is engaged with the connecting ring through the assembly grooves.

[0019] Preferably, the plurality of toggle plates are evenly distributed around the axis of the conical seat, the toggle plates are fixedly connected to the conical seat, connecting plates are fixedly connected on both sides of the bottom of the conical sleeve, the connecting plates on both sides are symmetrically distributed along the axis of the conical sleeve, and one end of the connecting plate away from the conical sleeve is fixedly connected to the inner wall of the fixed seat.

[0020] Preferably, the screening component comprises a vibration table, which is placed on the top of the mixing component, a screening cylinder is sleeved in the middle of the vibration table, the screening cylinder is placed on the top of the conical seat, and the vibration table is fixedly connected to the screening cylinder.

[0021] Preferably, a plurality of evenly distributed screening holes are provided at the bottom of the inner cavity of the screening cylinder, a partition is installed in the screening cylinder, and top seats are fixedly connected to both sides of the bottom of the vibration table close to the servo motor, and the top seats on both sides are symmetrically distributed along the axis of the vibration table.

[0022] Preferably, inclined surfaces are provided on both sides of the bottom of the top seat for easy contact with the top rod, the top rod is slidably connected to the top seat, a plurality of elastic parts are fixedly connected around the bottom of the vibration table, the plurality of elastic parts are evenly distributed around the axis of the vibration table, and one end of the elastic part away from the vibration table is fixedly connected to the top of the fixed seat.

[0023] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0024] The present invention utilizes a screening and mixing device to ensure uniform mixing and proper particle size of aluminum powder, active agent calcium oxide and foam stabilizer calcium silicate, thereby ensuring uniform progress of the subsequent reaction process. After adding water for activation, the active agent calcium oxide reacts with the aluminum powder to generate gas, forming uniform bubbles, which promotes the foaming process of the concrete. The foam stabilizer calcium silicate stabilizes the bubbles, enhances the microstructure of the concrete, and improves the compressive strength and durability. The use of active agent calcium oxide and foam stabilizer calcium silicate has little impact on the environment, which helps to reduce the carbon footprint in the construction process. The improved concrete structure provides better thermal insulation and sound insulation performance, making it more competitive in construction projects. The designed screening and mixing device utilizes components such as a vibration table and a screening drum to achieve automatic, efficient and precise material screening and mixing, thereby improving production efficiency and product quality. The method and equipment design not only improve the performance and stability of the concrete, but also optimize the production process, meet environmental protection requirements, and are suitable for application needs in engineering construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 The present invention Figure 1 The enlarged structural diagram at A in the middle;

[0028] Figure 3 It is a schematic diagram of the exploded structure of multiple parts of the present invention;

[0029] Figure 4 It is a schematic diagram of the assembly structure of the turntable and the vibration table of the present invention;

[0030] Figure 5 It is a schematic diagram of the assembly structure of the fixing seat and the mixing assembly of the present invention;

[0031] Figure 6 The present invention Figure 5 The enlarged structural diagram at B in the middle;

[0032] Figure 7 It is a schematic diagram of the assembly structure of the rotating disk and the connecting ring of the present invention.

[0033] In the figure:

[0034] 1. Fixed seat; 101. Connecting window; 2. Mixing assembly; 201. Conical seat; 202. Connecting ring; 203. Assembly groove; 204. Spiral plate; 205. Toggle plate; 206. Conical sleeve; 207. Spiral channel; 208. Connecting plate; 3. Screening assembly; 301. Vibrating table; 302. Screening cylinder; 303. Screening hole; 304. Partition; 305. Top seat; 306. Inclined surface; 307. Elastic member; 4. Driving assembly; 401. Servo motor; 402. Connecting seat; 403. Rotating disk; 404. Push rod. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution 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 only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0036] See also Figure 1-Figure 7, the present invention provides an aluminum powder gas-generating material for aerated concrete, which comprises the following materials by weight: aluminum powder, accounting for 70% to 80% of the total gas-generating material weight;

[0037] Activator calcium oxide, accounting for 16% to 20% by weight of the total gas-generating material;

[0038] Foam stabilizer calcium silicate, accounting for 3% to 8% of the total gas-generating material weight,

[0039] The active agent calcium oxide can release more gas in the concrete, promoting the aluminum powder to react more effectively to produce bubbles, thereby improving the foaming effect of the concrete. This means that the bubbles in the concrete are more evenly distributed, the density is lower, and the strength is higher. The foam stabilizer calcium silicate can stabilize the bubbles and enhance the microstructure of the concrete, which helps to improve the compressive strength and durability of the concrete. This allows the concrete to maintain stable performance in long-term use. Due to the more even distribution and enhanced stability of the bubbles in the concrete, the improved concrete structure can provide better insulation and sound insulation, making it more competitive in construction projects. Using calcium oxide and calcium silicate as active agents and foam stabilizers, these materials themselves have relatively little impact on the environment, which helps to reduce the carbon footprint of the construction process, and can significantly improve the physical properties and engineering applicability of concrete, and enhance its stability, strength and functional performance.

[0040] A method for preparing an aluminum powder gas-generating material for aerated concrete comprises preparing raw materials: aluminum powder accounts for 70% to 80% of the total weight of the foamed concrete, calcium oxide as an active agent accounts for 16% to 20% of the total weight of the foamed concrete, and calcium silicate as a foam stabilizer accounts for 3% to 8% of the total weight of the foamed concrete; the raw materials are firstly put into a screening and mixing device, and the aluminum powder, calcium oxide as an active agent and calcium silicate as a foam stabilizer are uniformly mixed and screened by the screening and mixing device to ensure the uniformity and proper particle size of the raw materials so that the subsequent reaction process can be carried out uniformly; the mixed raw materials are activated by adding water, and the addition of water starts the reaction of the active agent and the foam stabilizer with the aluminum powder. Gas is generated to form bubbles, so that the concrete foams; during the activation process, the bubbles form tiny pores in the concrete to form foamed concrete, and the concrete will undergo a preliminary hardening and curing process within a certain period of time; the finished concrete is cured to ensure that the designed strength and durability are achieved, wherein the screening and mixing device includes a fixed seat 1, a mixing component 2 is sleeved inside the fixed seat 1, a screening component 3 is arranged on the top of the fixed seat 1, and driving components 4 for controlling the working states of the mixing component 2 and the screening component 3 are arranged on both sides of the fixed seat 1, and connecting windows 101 are opened on both sides of the fixed seat 1, and the connecting windows 101 on both sides are symmetrically distributed along the axis of the fixed seat 1.

[0041] The driving assembly 4 includes two servo motors 401, which are respectively arranged on both sides of the fixing seat 1. The end of the servo motor 401 away from the fixing seat 1 is sleeved with a connecting seat 402, and the connecting seat 402 is fixedly connected to the servo motor 401. The end of the connecting seat 402 away from the servo motor 401 is fixedly connected to the outer surface of the fixing seat 1. The output end of the servo motor 401 extends to the inner side of the fixing seat 1 through the connecting window 101. The output end of the servo motor 401 is fixedly connected to a rotating disk 403, and a plurality of ejector rods 404 are fixedly connected around the rotating disk 403. The rods 404 are evenly distributed around the axis of the rotating disk 403, and the output ends of the two servo motors 401 rotate in the same direction. At the same time, a vibration table 301 is provided in the screening component 3, and the vibration table 301 is placed on the top of the mixing component 2. A screening cylinder 302 is sleeved in the middle of the vibration table 301, and the screening cylinder 302 is placed on the top of the conical seat 201. The vibration table 301 is fixedly connected to the screening cylinder 302. A plurality of evenly distributed screening holes 303 are provided at the bottom of the inner cavity of the screening cylinder 302. A partition 304 is installed in the screening cylinder 302. The bottom of the vibration table 301 is fixed near both sides of the servo motor 401. A top seat 305 is fixedly connected, and the top seats 305 on both sides are symmetrically distributed along the axis of the vibration table 301. Inclined surfaces 306 for contacting the top rod 404 are provided on both sides of the bottom of the top seat 305. The top rod 404 is slidably connected to the top seat 305. A plurality of elastic members 307 are fixedly connected around the bottom of the vibration table 301. The plurality of elastic members 307 are evenly distributed around the axis of the vibration table 301. One end of the elastic member 307 away from the vibration table 301 is fixedly connected to the top of the fixed seat 1. The servo motor 401 drives the rotating disk 403 to rotate, and drives the rotating disk 403 to rotate through the contact between the top rod 404 and the top seat 305. The vibration table 301 and the screening drum 302 move upward, and the screening drum 302 moves downward driven by the elastic member 307, reciprocating to screen the material in the screening drum 302, which is helpful for subsequent mixing. The design of the vibration table 301 enables the screening drum 302 to effectively screen the materials. The multiple screening holes 303 help to quickly separate materials of different particle sizes, thereby improving the screening efficiency. The screening process can be automated and precisely controlled, reducing the complexity and error rate of manual operation. It has the characteristics of high efficiency and precision, and is suitable for fine screening and pretreatment of aluminum powder gassing materials.

[0042] In addition, a conical seat 201 is provided in the mixing assembly 2, the middle of the fixed seat 1 is connected, the fixed seat 1 is sleeved on the surface of the conical seat 201, the fixed seat 1 is not directly connected to the conical seat 201, the cone head of the conical seat 201 faces the bottom, and a connecting ring 202 is sleeved around the top of the conical seat 201. The inner ring wall of the connecting ring 202 is fixedly connected to the conical seat 201, and the outer ring wall of the connecting ring 202 is provided with a plurality of assembly grooves 203 matching the ejector rod 404, and the plurality of assembly grooves 203 are evenly distributed around the axis of the connecting ring 202. The push rod 404 is meshed with the connecting ring 202 through the assembly groove 203. The conical seat 201 is surrounded by multiple layers of continuous spiral plates 204. The spiral plates 204 are fixedly connected to the conical seat 201. The surface of the conical support is sleeved with a conical sleeve 206. The conical sleeve 206 is sleeved on the surface of the spiral plate 204, and the spiral plate 204 and the conical sleeve 206 are rotatably connected. A continuous spiral channel 207 from top to bottom is formed between the conical seat 201, the spiral plate 204 and the conical sleeve 206. The spiral channel 207 has multiple toggle plates 205 built in, and the multiple toggle plates 205 are evenly distributed around the axis of the conical seat 201. The toggle plates 205 are fixedly connected to the conical seat 201. The two sides of the bottom of the conical sleeve 206 are fixedly connected with connecting plates 208. The connecting plates 208 on both sides are symmetrically distributed along the axis of the conical sleeve 206. The end of the connecting plate 208 away from the conical sleeve 206 is fixedly connected to the inner wall of the fixed seat 1. The servo motor 401 can simultaneously drive the conical seat 201 to rotate during the rotation process. The aluminum powder gas-generating material is extruded in and out of the spiral channel 207 and is fully mixed with the toggle plate 205. The screened material can be mixed again after the subsequent addition of raw materials to ensure that the ratio of the aluminum powder gas-generating material is correct. The design of the spiral plate 204 and the toggle plate 205 can effectively mix and extrude the aluminum powder gas-generating material to ensure the uniformity and quality of the mixing: through the continuous spiral channel 207, the aluminum powder gas-generating material can be effectively extruded and mixed, which helps to improve production efficiency and product quality.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An aluminum powder gas-generating material for aerated concrete, characterized in that: The following materials are included by weight: Aluminum powder, accounting for 70% to 80% of the total gas-generating material weight; Activator calcium oxide, accounting for 16% to 20% by weight of the total gas-generating material; The foam stabilizer calcium silicate accounts for 3% to 8% by weight of the total gas-generating material.

2. The method for preparing an aluminum powder gas-generating material for aerated concrete according to claim 1, characterized in that: The specific process is: S101. Prepare raw materials: aluminum powder accounts for 70% to 80% of the total weight of the foamed concrete, active agent calcium oxide accounts for 16% to 20% of the total weight of the foamed concrete, and foam stabilizer calcium silicate accounts for 3% to 8% of the total weight of the foamed concrete; S102, mixing raw materials: the raw materials are first placed in a screening and mixing device, and the aluminum powder, the active agent calcium oxide and the foam stabilizer calcium silicate are uniformly mixed and screened by the screening and mixing device to ensure the uniformity and appropriate particle size of the raw materials so that the subsequent reaction process can be carried out uniformly; S103, water addition activation: the mixed raw materials are activated by adding water. The addition of water starts the reaction between the activator and the foam stabilizer and the aluminum powder, generating gas to form bubbles, so that the concrete foams; S104, Concrete formation: During the activation process, bubbles form tiny pores in the concrete, forming foamed concrete, and the concrete will undergo a preliminary hardening and curing process within a certain period of time; S105. Curing: Curing of finished concrete to ensure that the designed strength and durability are achieved.

3. The method for preparing an aluminum powder gas-generating material for aerated concrete according to claim 2, characterized in that: The screening and mixing device comprises a fixed seat (1), a mixing assembly (2) is sleeved inside the fixed seat (1), a screening assembly (3) is arranged on the top of the fixed seat (1), driving assemblies (4) for controlling the working states of the mixing assembly (2) and the screening assembly (3) are arranged on both sides of the fixed seat (1), connecting windows (101) are opened on both sides of the fixed seat (1), and the connecting windows (101) on both sides are symmetrically distributed along the axis of the fixed seat (1), the driving assembly (4) comprises two servo motors (401), the output end of the servo motor (401) is fixedly connected to a rotating disk (403), and the rotating disk (403) is fixedly connected to a plurality of push rods (404) around the periphery, and the mixing assembly (2) comprises a conical seat (201), and the top of the conical seat (201) is sleeved with a connecting ring (201) around the periphery. 2), the inner ring wall of the connecting ring (202) is fixedly connected to the conical seat (201), the outer ring wall of the connecting ring (202) is provided with a plurality of assembly grooves (203) matching with the top rod (404), the conical seat (201) is sleeved with multiple layers of continuous spiral plates (204) around it, the spiral plates (204) are fixedly connected to the conical seat (201), the surface of the conical support is sleeved with a conical sleeve (206), the conical sleeve (206) is sleeved on the surface of the spiral plate (204), and the spiral plate (204) and the conical sleeve (206) are rotatably connected, a continuous spiral channel (207) from top to bottom is formed between the conical seat (201), the spiral plate (204) and the conical sleeve (206), and the spiral channel (207) is built with a plurality of toggle plates (205).

4. The method for preparing an aluminum powder gas-generating material for aerated concrete according to claim 3, characterized in that: The two servo motors (401) are respectively arranged on both sides of the fixing seat (1); one end of the servo motor (401) away from the fixing seat (1) is sleeved with a connecting seat (402); the connecting seat (402) is fixedly connected to the servo motor (401); and one end of the connecting seat (402) away from the servo motor (401) is fixedly connected to the outer surface of the fixing seat (1).

5. The method for preparing the aluminum powder gas-generating material for aerated concrete according to claim 3, characterized in that: The output end of the servo motor (401) extends through the communication window (101) to the inside of the fixed seat (1), and the plurality of push rods (404) are evenly distributed around the axis of the rotating disk (403). The output ends of the two servo motors (401) rotate in the same direction.

6. The method for preparing an aluminum powder gas-generating material for aerated concrete according to claim 3, characterized in that: The middle part of the fixed seat (1) is connected, the fixed seat (1) is sleeved on the surface of the conical seat (201), the fixed seat (1) is not directly connected to the conical seat (201), the cone head of the conical seat (201) faces the bottom, a plurality of the assembly grooves (203) are evenly distributed around the axis of the connecting ring (202), and the push rod (404) is meshedly connected with the connecting ring (202) through the assembly grooves (203).

7. The method for preparing an aluminum powder gas-generating material for aerated concrete according to claim 3, characterized in that: The plurality of toggle plates (205) are evenly distributed around the axis of the conical seat (201), the toggle plates (205) are fixedly connected to the conical seat (201), the bottom sides of the conical sleeve (206) are fixedly connected with connecting plates (208), the connecting plates (208) on both sides are symmetrically distributed along the axis of the conical sleeve (206), and one end of the connecting plate (208) away from the conical sleeve (206) is fixedly connected to the inner wall of the fixed seat (1).

8. The method for preparing the aluminum powder gas-generating material for aerated concrete according to claim 3, characterized in that: The screening component (3) comprises a vibration table (301), the vibration table (301) is placed on the top of the mixing component (2), a screening cylinder (302) is sleeved in the middle of the vibration table (301), the screening cylinder (302) is placed on the top of the conical seat (201), and the vibration table (301) is fixedly connected to the screening cylinder (302).

9. The method for preparing the aluminum powder gas-generating material for aerated concrete according to claim 8, characterized in that: A plurality of evenly distributed screening holes (303) are provided at the bottom of the inner cavity of the screening cylinder (302), a partition plate (304) is installed in the screening cylinder (302), and top seats (305) are fixedly connected to both sides of the bottom of the vibration table (301) close to the servo motor (401), and the top seats (305) on both sides are symmetrically distributed along the axis of the vibration table (301).

10. The method for preparing the aluminum powder gas-generating material for aerated concrete according to claim 9, characterized in that: Both sides of the bottom of the top seat (305) are provided with inclined surfaces (306) for contacting the top rod (404); the top rod (404) is slidably connected to the top seat (305); a plurality of elastic members (307) are fixedly connected around the bottom of the vibration table (301); the plurality of elastic members (307) are evenly distributed around the axis of the vibration table (301); and one end of the elastic member (307) away from the vibration table (301) is fixedly connected to the top of the fixed seat (1).

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