Environment-friendly ALC wallboard and preparation method thereof

Abstract

The invention relates to the technical field of ALC wallboards, in particular to an environment-friendly ALC wallboard. The environment-friendly ALC wallboard comprises a wallboard main body, a reinforcing mesh is embedded in the wallboard main body, the wallboard main body is made of fireproof and waterproof filler, a tenon and a tenon which are matched with each other are arranged on the two sides of the wallboard main body, and a fireproof layer and a waterproof layer are arranged on the outer surface of the wallboard main body. The invention further provides a preparation method of the wallboard. The preparation method comprises the steps that S1, steel bars are subjected to rust removal, straightening, cutting and welding to form steel bar meshes for standby application; s2, stirring the raw materials at a high speed, performing wet grinding, and injecting into a mold frame to form a blank body; s3, the reinforcing mesh is installed in a mold frame, a fireproof layer is laid, and constant-temperature pre-curing is conducted; and S4, after demolding, spraying a waterproof layer, and finally performing high-temperature autoclaved curing. Aiming at the defects in the prior art, the environment-friendly ALC wallboard with reliable performance is provided, the ALC wallboard has relatively high strength and fireproof, flame-retardant and waterproof performance, a wall body is not easy to crack, and the ALC wallboard can be used in kitchens and bathrooms.

Description

Technical Field

[0001] The invention relates to the technical field of ALC wall panels, and in particular to an environmentally friendly ALC wall panel. Background Art

[0002] ALC wallboard (Autoclaved Lightweight Concrete, ALC for short) is the abbreviation of autoclaved lightweight concrete, which is a kind of high-performance autoclaved aerated concrete. ALC wallboard is made of quartz sand (or silica sand), cement, lime and other raw materials, and contains treated steel reinforcement and high-pressure steam curing to form a porous concrete forming board. It is a new type of building material with superior performance.

[0003] With the acceleration of my country's urbanization process and the vigorous development of the construction and real estate industry, ALC wall panels are increasingly used in engineering projects. However, due to the characteristics of ALC wall panels themselves, there are also some limitations. For example, the strength of the wall panels is relatively low, and the walls are easily damaged by impact. Various cracks will appear under temperature changes, and they have certain water absorption, which may cause the walls to become damp in some cases. The moisture-proof and fire-proof performance is poor, so it is not suitable for use in kitchens and bathrooms. When ALC wall panels encounter high temperatures or large fires, the ALC panels may be damaged, causing inconvenience to users. Therefore, it is urgent to make technical improvements to the existing ALC wall panels. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an environmentally friendly ALC wallboard with reliable performance and a preparation method thereof. The ALC wallboard has high strength and good fire retardancy and waterproof performance, the wall is not easy to crack, and can be used in kitchens and bathrooms.

[0005] The technical solution of the present invention is implemented as follows: an environmentally friendly ALC wall panel, including a wall panel body, in which a steel mesh is embedded, characterized in that: the wall panel body is made of fireproof and water-stopping filler, matching convex and concave flanges are provided on both sides of the wall panel body, and the outer surface of the wall panel body is provided with a fireproof layer and a waterproof layer.

[0006] The fireproof and water-stopping filler includes the following raw materials in parts by mass: 25-45 parts of quartz sand, 10-15 parts of tailings sand, 25-30 parts of cement, 3-8 parts of glass fiber, 0.2-1 part of aluminum chloride, 0.5-1 part of magnesium oxide, 1-3 parts of mica flakes, 2-5 parts of sodium silicate, 1-4 parts of foaming agent, 5-8 parts of waterproofing agent, 15-25 parts of water, and 0.1-0.5 parts of additives.

[0007] The fireproof layer is silicone rubber coated glass fiber cloth, basalt fiber fireproof cloth, acrylic fiber fireproof cloth or ceramic fiber fireproof cloth.

[0008] The waterproof layer is a polyurethane waterproof coating layer, an acrylic waterproof coating layer or a silicone waterproof coating layer.

[0009] The present invention provides a method for preparing the environmentally friendly ALC wallboard, which is characterized by comprising the following steps:

[0010] S1. Derust, straighten and cut the steel bars, and then weld them into steel mesh for standby use;

[0011] S2. According to the weight ratio, quartz sand, tailings sand, cement, glass fiber, aluminum chloride, magnesium oxide, mica powder, foaming agent, waterproofing agent, water and additives are stirred at high speed and wet-milled with a ball mill to obtain a fireproof and waterproof filler poured into the mold frame to form an embryo;

[0012] S3. The cast mold frame is vibrated to remove bubbles generated by casting, and the steel mesh is installed and fixed to the raw material of the mold frame according to the size and relative position required by the process, and then the fiber fireproof cloth is laid on the upper and lower surfaces of the mold frame, and the mold frame is sent to the curing kiln for constant temperature pre-curing;

[0013] S4. After pre-curing reaches the demoulding requirements, the mold frame is separated by a turning machine and the size is cut. The surface of the cut embryo is sprayed with waterproof coating, two layers of spraying, and after the coating is dried, it is sent to the autoclave for high-temperature autoclaving curing to make the embryo undergo physical and chemical reactions, increase the prefabrication strength of the wallboard, and cool to obtain the ALC lightweight partition board.

[0014] Preferably, in step S3, the pre-curing temperature is 60-90° C., the humidity is 50%-70%, and the pre-curing time is 3-7 hours.

[0015] Preferably, in step S4, the steam pressure of high temperature autoclave curing is 1-1.5 MPa, the temperature is 170° C.-200° C., and the curing time is 5-10 h.

[0016] The present invention also provides a method for installing the environmentally friendly ALC wallboard, which is characterized by comprising the following steps:

[0017] A1. Before installation, make a panel layout diagram and list the installation sequence of ALC wall panels, and try to reduce and avoid the number of panels embedded in the vertical direction of the partition wall to ensure the bonding quality of the joints; then clean the base floor to ensure the flatness of the construction site; measure and lay out the lines, and pop up the horizontal double-sided edge lines of the partition wall and the door and window opening lines on the ground to ensure the verticality and flatness of the wall surface;

[0018] A2. Lift the ALC wall panels to the designated location and install them according to the layout drawing. Fix the upper part of the ALC wall panels with U-shaped clips or pipe clips. After the panels are in place, drive wooden wedges into the bottom of the panels to tighten them. Fill the gaps at the bottom with bonding mortar. After the mortar solidifies to the preset strength, take out the wooden wedges and fill the positions of the wooden wedges with bonding mortar.

[0019] A3. When splicing wall panels, first apply bonding mortar on the surface of the convex and concave surfaces, then splice adjacent wall panels together through the convex and concave surfaces, stick 200-300mm wide fiberglass mesh cloth on the wall panel joints and smooth and compact them with anti-cracking mortar, and control the panel joints within 2-3mm;

[0020] A4. The joints between the top of the wall panels and the beams are sealed with mortar and sealed with caulking agent, and the wall panels and columns are connected with adhesives;

[0021] A5. Set a contraction joint at the connection between the door frame and the long wall, give it enough time to release the wall stress, and then use mortar to caulking the contraction joint to prevent the inverted eight-shaped joint;

[0022] A6. Carry out surface coating, such as puttying and spraying paint, to further improve the appearance and performance of the wall. After the installation of ALC panels, conduct quality inspection to ensure that the installation quality and construction quality of the wall panels meet the specifications.

[0023] The mortar is a polymer type cement mortar.

[0024] Preferably, the moisture content of the ALC wallboard during installation is not more than 15%, and the U-shaped clip is a U-shaped connector made of flat steel with a thickness of not less than 3 mm.

[0025] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0026] 1. The present invention adopts quartz sand and cement as main materials to prepare ALC wall panels, which have the advantages of light weight, high strength, heat preservation, fire resistance, waterproofness and one-time forming of large panels, simple process, and are green building materials. The wall panels do not need plastering, and can be directly puttyed and sprayed with paint; the cost performance is high, and it is energy-saving and environmentally friendly.

[0027] 2. The ALC wallboard of the present invention is made of fireproof and water-stopping fillers. The fireproof and water-stopping fillers are prepared with waterproofing agents in a certain proportion by metal salts such as aluminum chloride and water, and will react with quartz sand, cement and water to promote the hydration of cement. At the same time, compounds such as hydrated calcium chloroaluminate are generated during the coagulation and hardening of the mortar to fill the pores in the wallboard, thereby improving the density of the mortar and the waterproof performance of the wallboard. Cement and quartz sand are used as the base material, and tailings sand is used as the aggregate. The synergistic effect of magnesium oxide, mica flakes and sodium silicate can improve the fire retardant performance of the ALC board, and it has excellent fire resistance and environmental protection performance. The glass fiber provided can resist the internal shrinkage stress of the wallboard and eliminate the risk of cracking of the wallboard in the later stage.

[0028] 3. The ALC wallboard of the present invention is provided with a waterproof layer 6, and the dense structure makes it difficult for water to penetrate into the interior of the wallboard, thereby preventing the wallboard from expanding after being damp and shrinking and deforming after being dehydrated, which may cause cracking of the wall. By providing a fireproof layer, the fiber fireproof cloth can play a flame retardant role, thereby slowing down the spread of fire, further improving the flame retardant performance of the wallboard, and achieving a good fireproof effect.

[0029] 4. The installation method of the ALC wall panels provided by the present invention takes into account the influence of factors such as maintenance, carries out quality control on each link of the construction, effectively avoids the splicing cracks of the ALC wall panels, and ensures the quality of the construction project. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the ALC wallboard of the present invention;

[0032] Figure 2 It is a front cross-sectional schematic diagram of the ALC wallboard of the present invention;

[0033] Figure 3 for Figure 2 A top view schematic diagram of

[0034] In the figure: 1- wall panel body, 2- steel mesh, 3- convex falcon, 4- concave falcon, 5- fireproof layer, 6- waterproof layer. DETAILED DESCRIPTION

[0035] Example 1

[0036] See Figures 1 to 3The environmentally friendly ALC wall panel shown includes a wall panel body 1, a steel mesh 2 is embedded in the wall panel body 1, the wall panel body 1 is made of fireproof and water-stopping filler, matching convex grommets 3 and concave grommets 4 are arranged on both sides of the wall panel body 1, and the outer surface of the wall panel body 1 is provided with a fireproof layer 5 and a waterproof layer 6. The fireproof layer 5 is a silicone rubber coated glass fiber cloth, a basalt fiber fireproof cloth, an acrylic fiber fireproof cloth or a ceramic fiber fireproof cloth. The waterproof layer 6 is a polyurethane waterproof coating layer, an acrylic waterproof coating layer or a silicone waterproof coating.

[0037] Example 2

[0038] The present invention provides a method for preparing the environmentally friendly ALC wallboard, comprising the following steps:

[0039] S1. Derust, straighten and cut the steel bars, and then weld them into steel mesh for standby use;

[0040] S2. According to the composition ratio of the fireproof and waterproof filler, weigh the following raw materials by mass: 33 parts of quartz sand, 13 parts of tailings sand (silica sand), 27 parts of cement, 6 parts of glass fiber, 0.6 parts of aluminum chloride, 0.8 parts of magnesium oxide, 2 parts of mica flakes, 3 parts of sodium silicate, 2 parts of foaming agent, 6 parts of waterproofing agent, 20 parts of water, and 0.3 parts of additives. Quartz sand, tailings sand, cement, glass fiber, aluminum chloride, magnesium oxide, mica powder, foaming agent, waterproofing agent, water and additives are stirred at high speed in sequence, wet-milled with a ball mill, and the obtained fireproof and waterproof filler is poured into the mold frame to form an embryo;

[0041] S3. The cast mold frame is vibrated to remove bubbles generated by casting, and the steel mesh is fixed to the raw material of the mold frame according to the size and relative position required by the process. Then, ceramic fiber fireproof cloth is laid on the upper and lower surfaces of the mold frame, and the mold frame is sent to the curing kiln for constant temperature pre-curing; the pre-curing temperature is 85℃, the humidity is 65%, and the pre-curing time is 5h.

[0042] S4. After pre-curing reaches the demoulding requirements, the mold frame is separated by a turning machine and the size is cut. The surface of the cut embryo is sprayed with polyurethane waterproof coating, and two layers are sprayed. After the coating is dried, it is sent to the autoclave for high-temperature autoclaving curing. The steam pressure of high-temperature autoclaving curing is 1.2MPa, the temperature is 180℃, and the curing time is 8h; the embryo undergoes physical and chemical reactions to increase the prefabrication strength of the wallboard, and the ALC lightweight partition board is obtained by cooling.

[0043] The obtained ALC wall panels were subjected to performance tests to obtain the main performance data:

[0044] Among them, the compressive strength is tested with reference to GB15762-2008 "Autoclaved Aerated Concrete (AAC) Plate";

[0045] The fire protection level is tested in accordance with GB8624-2012;

[0046] Thermal conductivity is tested according to GB / T10294;

[0047] The drying shrinkage value is tested with reference to GB15762-2008 "Autoclaved Aerated Concrete (AAC) Board";

[0048] Product performance: compressive strength 5.5MPa, fire protection grade A, thermal conductivity 0.13w / (m·k), drying shrinkage value 0.13mm / m. All indicators are better than the relevant indicator parameter requirements in GB national standard.

[0049] Example 3

[0050] The present invention provides a method for preparing the environmentally friendly ALC wallboard, comprising the following steps:

[0051] S1. Derust, straighten and cut the steel bars, and then weld them into steel mesh for standby use;

[0052] S2. According to the composition ratio of the fireproof and waterproof filler, weigh the following raw materials by mass: 25 parts of quartz sand, 10 parts of tailings sand (silica sand), 25 parts of cement, 3 parts of glass fiber, 0.2 parts of aluminum chloride, 0.5 parts of magnesium oxide, 1 part of mica flakes, 2 parts of sodium silicate, 1 part of foaming agent, 5 parts of waterproofing agent, 15 parts of water, and 0.1 parts of additives. Quartz sand, tailings sand, cement, glass fiber, aluminum chloride, magnesium oxide, mica powder, foaming agent, waterproofing agent, water and additives are stirred at high speed in sequence, wet-milled with a ball mill, and the obtained fireproof and waterproof filler is poured into the mold frame to form an embryo;

[0053] S3. The cast mold frame is vibrated to remove bubbles generated by casting, and the steel mesh is fixed to the raw material of the mold frame according to the size and relative position required by the process. Then, basalt fiber fireproof cloth is laid on the upper and lower surfaces of the mold frame, and the mold frame is sent to the curing kiln for constant temperature pre-curing; the pre-curing temperature is 60℃, the humidity is 50%, and the pre-curing time is 3h.

[0054] S4. After pre-curing meets the demoulding requirements, the mold frame is separated by a turning machine and the size is cut. The surface of the cut embryo is sprayed with polyurethane waterproof coating, and two layers are sprayed. After the coating is dried, it is sent to the autoclave for high-temperature autoclaving curing. The steam pressure of high-temperature autoclaving curing is 1MPa, the temperature is 170℃, and the curing time is 5h; the embryo undergoes physical and chemical reactions to increase the prefabrication strength of the wallboard, and the ALC lightweight partition board is obtained by cooling.

[0055] Product performance: compressive strength 4.8MPa, fire protection grade A, thermal conductivity 0.16w / (m·k), drying shrinkage value 0.16mm / m. All indicators are better than the relevant indicator parameter requirements in GB national standard.

[0056] Example 4

[0057] The present invention provides a method for preparing the environmentally friendly ALC wallboard, comprising the following steps:

[0058] S1. Derust, straighten and cut the steel bars, and then weld them into steel mesh for standby use;

[0059] S2. According to the composition ratio of the fireproof and waterproof filler, weigh the following raw materials by mass: 45 parts of quartz sand, 15 parts of tailings sand (silica sand), 30 parts of cement, 8 parts of glass fiber, 1 part of aluminum chloride, 1 part of magnesium oxide, 3 parts of mica flakes, 5 parts of sodium silicate, 4 parts of foaming agent, 8 parts of waterproofing agent, 25 parts of water, and 0.5 parts of additives. Quartz sand, tailings sand, cement, glass fiber, aluminum chloride, magnesium oxide, mica powder, foaming agent, waterproofing agent, water and additives are stirred at high speed in sequence, wet-milled with a ball mill, and the obtained fireproof and waterproof filler is poured into the mold frame to form an embryo;

[0060] S3. The cast mold frame is vibrated to remove bubbles generated by casting, and the steel mesh is fixed to the raw material of the mold frame according to the size and relative position required by the process. Then, ceramic fiber fireproof cloth is laid on the upper and lower surfaces of the mold frame, and the mold frame is sent to the curing kiln for constant temperature pre-curing; the pre-curing temperature is 90℃, the humidity is 70%, and the pre-curing time is 7h.

[0061] S4. After pre-curing meets the demoulding requirements, the mold frame is separated by a turning machine and the size is cut. The surface of the cut embryo is sprayed with acrylic waterproof coating. Two layers are sprayed. After the coating is dried, it is sent to the autoclave for high-temperature autoclaving curing. The steam pressure of high-temperature autoclaving curing is 1.5MPa, the temperature is 200℃, and the curing time is 10h; the embryo undergoes physical and chemical reactions to increase the prefabrication strength of the wallboard, and the ALC lightweight partition board is obtained by cooling.

[0062] Product performance: compressive strength 5.2MPa, fire protection grade A, thermal conductivity 0.11w / (m·k), drying shrinkage value 0.20mm / m, all indicators are better than the relevant indicator parameter requirements in GB national standard.

[0063] The present invention also provides a method for installing the environmentally friendly ALC wallboard, comprising the following steps:

[0064] A1. Before installation, make a panel layout diagram and list the installation sequence of ALC wall panels, and try to reduce and avoid the number of panels embedded in the vertical direction of the partition wall to ensure the bonding quality of the joints; then clean the base floor to ensure the flatness of the construction site; measure and lay out the lines, and pop up the horizontal double-sided edge lines of the partition wall and the door and window opening lines on the ground to ensure the verticality and flatness of the wall surface;

[0065] A2. Lift the ALC wall panels to the designated location and install them according to the layout drawing. Fix the upper part of the ALC wall panels with U-shaped clips or pipe clips. After the panels are in place, drive wooden wedges into the bottom of the panels to tighten them. Fill the gaps at the bottom with bonding mortar. After the mortar solidifies to the preset strength, take out the wooden wedges and fill the positions of the wooden wedges with bonding mortar.

[0066] A3. When splicing wall panels, first apply bonding mortar on the surface of convex 3 and concave 4, and then splice adjacent wall panels together through the convex and concave. Paste 200-300mm wide fiberglass mesh cloth on the wall panel joints and smooth and compact it with anti-cracking mortar to enhance the stability and sealing of the joints. The board joints are controlled within 2-3mm;

[0067] A4. The joints between the top of the wall panels and the beams are sealed with mortar and sealed with caulking agent, and the wall panels and columns are connected with adhesives;

[0068] A5. Set a contraction joint at the connection between the door frame and the long wall, give it enough time to release the wall stress, and then use mortar to caulking the contraction joint to prevent the inverted eight-shaped joint;

[0069] A6. Carry out surface coating, such as puttying and spraying paint, to further improve the appearance and performance of the wall. After the installation of ALC panels, conduct quality inspection to ensure that the installation quality and construction quality of the wall panels meet the specifications.

[0070] The principle of the present invention is: the present invention adopts quartz sand and cement as main materials to prepare ALC wall panels, which have the advantages of light weight, high strength, heat preservation, fire resistance, waterproofness and one-time forming of large panels, simple process, and are green building materials. The wall panels do not need plastering, and can be directly puttyed and sprayed with paint; the cost performance is high, and it is energy-saving and environmentally friendly.

[0071] The present invention splices the convex ribs 3 and the concave ribs 4 together, so the construction is fast and convenient, and at the same time the connection strength between the wall panels is improved, avoiding cracks at the installation locations of the wall panels.

[0072] The ALC wallboard of the present invention is made of fireproof and water-stopping fillers. The fireproof and water-stopping fillers are configured with waterproofing agents in a certain proportion by metal salts such as aluminum chloride and water, and will react with quartz sand, cement and water to promote the hydration of cement. At the same time, compounds such as hydrated calcium chloroaluminate are generated during the coagulation and hardening process of the mortar to fill the pores in the wallboard, thereby improving the density of the mortar and the waterproof performance of the wallboard. Cement and quartz sand are used as the base material, and tailings sand is used as the aggregate. The synergistic effect of magnesium oxide, mica flakes and sodium silicate can improve the fire retardant performance of the ALC board, and it has excellent fire resistance and environmental protection performance. The glass fiber provided can resist the internal shrinkage stress of the wallboard and eliminate the risk of cracking of the wallboard in the later stage.

[0073] The ALC wallboard of the present invention is provided with a waterproof layer 6, and the dense structure makes it difficult for water to penetrate into the interior of the wallboard, thereby preventing the wallboard from expanding after being damp and shrinking and deforming after being dehydrated, which causes the wall to crack. By providing a fireproof layer 5, the fiber fireproof cloth can play a flame retardant role, thereby slowing down the spread of fire, further improving the flame retardant performance of the wallboard, and having a good fireproof effect.

[0074] After the completion of the project, traditional ALC wall panels are prone to wall cracks or water seepage during use. There are many reasons for this problem, which can be roughly divided into the following reasons: the wall panels are still in a damp state during installation, and the panels shrink significantly after assembly, resulting in installation cracks; workers fail to perform operations in accordance with relevant specifications and standards during assembly operations, the joint processing process of the panels is incorrect, the raw materials used to process the joints are inappropriate, the mortar is not full, the joint processing time is incorrect, external load vibration, changes in the self-weight stress of the panels, temperature stress, and thermal expansion and contraction, etc. The installation method of ALC wall panels provided by the present invention takes into account the influence of factors such as maintenance, conducts quality control in all aspects of construction, effectively avoids joint cracks in ALC wall panels, and ensures the quality of the construction project.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An environmentally friendly ALC wall panel, comprising a wall panel body (1), wherein a steel mesh (2) is embedded in the wall panel body (1), characterized in that: The wall panel body (1) is made of fireproof and water-stopping filler, and matching convex flanges (3) and concave flanges (4) are provided on both sides of the wall panel body (1). The outer surface of the wall panel body (1) is provided with a fireproof layer (5) and a waterproof layer (6).

2. The environmentally friendly ALC wallboard according to claim 1 is characterized in that: The fireproof and water-stopping filler includes the following raw materials in parts by mass: 25-45 parts of quartz sand, 10-15 parts of tailings sand, 25-30 parts of cement, 3-8 parts of glass fiber, 0.2-1 part of aluminum chloride, 0.5-1 part of magnesium oxide, 1-3 parts of mica flakes, 2-5 parts of sodium silicate, 1-4 parts of foaming agent, 5-8 parts of waterproofing agent, 15-25 parts of water, and 0.1-0.5 parts of additives.

3. The environmentally friendly ALC wallboard according to claim 1 or 2, characterized in that: The fireproof layer (5) is silicone rubber coated glass fiber cloth, basalt fiber fireproof cloth, acrylic fiber fireproof cloth or ceramic fiber fireproof cloth.

4. The environmentally friendly ALC wallboard according to claim 1 or 2, characterized in that: The waterproof layer (6) is a polyurethane waterproof coating layer, an acrylic waterproof coating layer or a silicone waterproof coating layer.

5. A method for preparing the environmentally friendly ALC wallboard according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Derust, straighten and cut the steel bars, and then weld them into steel mesh for standby use; S2. According to the weight ratio, quartz sand, tailings sand, cement, glass fiber, aluminum chloride, magnesium oxide, mica powder, foaming agent, waterproofing agent, water and additives are stirred at high speed and wet-milled with a ball mill to obtain a fireproof and waterproof filler poured into the mold frame to form an embryo; S3. The cast mold frame is vibrated to remove bubbles generated by casting, and the steel mesh is installed and fixed to the raw material of the mold frame according to the size and relative position required by the process, and then the fiber fireproof cloth is laid on the upper and lower surfaces of the mold frame, and the mold frame is sent to the curing kiln for constant temperature pre-curing; S4. After pre-curing reaches the demoulding requirements, the mold frame is separated by a turning machine and the size is cut. The surface of the cut embryo is sprayed with waterproof coating, two layers of spraying, and after the coating is dried, it is sent to the autoclave for high-temperature autoclaving curing to make the embryo undergo physical and chemical reactions, increase the prefabrication strength of the wallboard, and cool to obtain the ALC lightweight partition board.

6. The method for preparing the environmentally friendly ALC wallboard according to claim 5, characterized in that: In step S3, the pre-curing temperature is 60-90° C., the humidity is 50%-70%, and the pre-curing time is 3-7 hours.

7. The method for preparing the environmentally friendly ALC wallboard according to claim 5, characterized in that: In step S4, the steam pressure of high temperature autoclave curing is 1-1.5 MPa, the temperature is 170° C.-200° C., and the curing time is 5-10 hours.

8. A method for installing the environmentally friendly ALC wallboard according to any one of claims 1 to 4, characterized in that: The following steps are involved: A1. Before installation, make a panel layout diagram and list the installation sequence of ALC wall panels, and try to reduce and avoid the number of panels embedded in the vertical direction of the partition wall to ensure the bonding quality of the joints; then clean the base floor to ensure the flatness of the construction site; measure and lay out the lines, and pop up the horizontal double-sided edge lines of the partition wall and the door and window opening lines on the ground to ensure the verticality and flatness of the wall surface; A2. Lift the ALC wall panels to the designated location and install them according to the layout drawing. Fix the upper part of the ALC wall panels with U-shaped clips or pipe clips. After the panels are in place, drive wooden wedges into the bottom of the panels to tighten them. Fill the gaps at the bottom with bonding mortar. After the mortar solidifies to the preset strength, take out the wooden wedges and fill the positions of the wooden wedges with bonding mortar. A3. When splicing the wall panels, first apply bonding mortar on the surface of the convex falcon (3) and the concave falcon (4), and then splice the adjacent wall panels together through the convex falcon and the concave falcon. The wall panel joints are affixed with 200 to 300 mm wide glass fiber mesh cloth and smoothed and compacted with anti-cracking mortar. The board joints are controlled within 2 to 3 mm; A4. The joints between the top of the wall panels and the beams are sealed with mortar and sealed with caulking agent, and the wall panels and columns are connected with adhesives; A5. Set a contraction joint at the connection between the door frame and the long wall, give it enough time to release the wall stress, and then use mortar to caulking the contraction joint to prevent the inverted eight-shaped joint; A6. Carry out surface coating to further enhance the beauty and performance of the wall. After the installation of ALC panels, conduct quality inspection to ensure that the installation quality and construction quality of the wall panels meet the regulatory requirements.

9. The method for installing the environmentally friendly ALC wallboard according to claim 8, characterized in that: The mortar is a polymer type cement mortar.

10. The method for installing the environmentally friendly ALC wallboard according to claim 8, characterized in that: The moisture content of the ALC wallboard during installation is not more than 15%, and the U-shaped card is a U-shaped connecting piece made of flat steel with a thickness of not less than 3mm.

Images