High-strength aerated board and preparation method thereof

Abstract

The application relates to the field of building materials and buildings, and particularly discloses a high-strength aerated board and a preparation method thereof. The aerated board is prepared from the following raw materials in parts by weight: aggregate 42-63 parts; quicklime 7-13 parts; cement 8-13 parts; aluminum powder 0.05-0.1 part; gypsum 40-55 parts; additive 0.2-0.4 part; modified fiber 1-3 parts; and water 50-70 parts. The modified fiber is obtained by grafting modified mesoporous silicon dioxide onto the fiber. The aerated board has the advantages of high strength.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building materials and construction, and more particularly, to a high-strength aerated board and a preparation method thereof. BACKGROUND

[0002] The autoclaved aerated concrete board, referred to as aerated board, is a high-performance lightweight board made of high-quality silica sand or fly ash, lime, cement, aluminum powder and the like as raw materials, through foaming and high-pressure steam curing and other processes. The aerated board has the advantages of light weight, good thermal insulation, good sound insulation, convenient construction, long-lasting fire resistance, small freeze-thaw loss, green environmental protection and the like, and is gradually used in the fields of buildings in severe cold regions and buildings in seismic regions.

[0003] At present, in order to improve the strength of the aerated board concrete, fibers are generally added, and a water reducing agent is essential in the concrete. The commonly used water reducing agent is mostly a polycarboxylic acid high-performance water reducing agent or a naphthalene sulfonate water reducing agent. As an anionic surfactant, the water reducing agent reduces the ion adsorption effect on the surface of the fiber, reduces the van der Waals force, electrostatic adsorption force and ion adsorption force to the minimum value, and is more easily dispersed under the external force of stirring, thereby affecting the strength of the aerated board after forming.

[0004] According to the related technology in the above, the inventors believe that the following defects exist: In the concrete, the presence of the water reducing agent weakens the adsorption capacity of the fiber surface to metal ions, thereby reducing the adhesion capacity of the fiber to the concrete, and further affecting the strength of the aerated board after forming. SUMMARY

[0005] In order to improve the strength of the aerated board after forming, the present application provides a high-strength aerated board and a preparation method thereof.

[0006] A high-strength aerated board is made of raw materials including the following weight parts:

[0007] Aggregates 42-63 parts;

[0008] Quicklime 7-13 parts;

[0009] Cement 8-13 parts;

[0010] Aluminum powder 0.05-0.1 parts;

[0011] Gypsum 40-55 parts;

[0012] Admixtures 0.2-0.4 parts;

[0013] Modified fibers 1-3 parts;

[0014] Water 50-70 parts;

[0015] The modified fiber is made by coating the fiber surface with a catechol group N-propyne amide helical polymer.

[0016] By adopting the above technical solution, the addition of quicklime powder releases a large amount of heat during the saturation of the quicklime powder, which promotes the formation of hydration gel, facilitates the control of the production process, and thus ensures product quality. The calcium sulfate in the gypsum reacts with the tricalcium aluminate in the cement mix to form ettringite, which reduces the hydration rate of the cement and thus plays a role in retarding the setting process. The aluminum powder is used as an expansion agent, which causes the concrete to expand slightly after use, reducing the shrinkage of the concrete.

[0017] During concrete mixing, the water-reducing agent added is also an anionic surfactant, which reduces the ability of the fibers added during the mixing process to bind metal ions. In particular, the fibers are more easily dispersed during the mixing process. The catechol groups in the N-propyne amide helical polymer have a strong adsorption effect on metal ions. By uniformly dispersing the N-propyne amide helical polymer on the fiber surface, the adsorption capacity of the fiber surface for metal ions is enhanced, thereby improving the mechanical properties of the concrete.

[0018] Preferably, the preparation of the modified fiber includes the following steps:

[0019] S1: First, the catechol-based N-propyne amide spiral polymer is ground. The catechol-based N-propyne amide spiral polymer powder and mesoporous silica are added to a ball mill for ball milling. The ball-milled powder is then sieved to obtain modified mesoporous silica.

[0020] S2: Add the modified mesoporous silica from S1 to the modifier and stir. Stir the slurry at low speed and add the fiber during the stirring process. After stirring evenly, the modified fiber is obtained.

[0021] By adopting the above technical solution, the catechol-based N-propyne amide helical polymer is thoroughly ground so that the particle size of the catechol-based N-propyne amide helical polymer powder is smaller than the pore size of mesoporous silica. The mesoporous silica and the catechol-based N-propyne amide helical polymer powder are mixed and added to a ball mill for ball milling. After ball milling, modified mesoporous silica is obtained. Modifier is added to the modified mesoporous silica and stirring is started so that the modifier is uniformly coated on the surface of the modified mesoporous silica. The resulting slurry is stirred at low speed. During the stirring process, fibers are added so that the modifier uniformly grafts the modified mesoporous silica onto the fibers. This not only yields modified fibers with stronger surface adsorption of metal ions, but also effectively increases the mechanical properties of the modified fibers.

[0022] Preferably, the particle size of the catechol-based N-propyne amide helical polymer powder in S1 is less than 2 nm.

[0023] By adopting the above technical solution, since the pore size of commonly available mesoporous silica is about 2nm-4nm, it is necessary to grind the catechol group N-propyne amide spiral polymer powder to less than 2nm.

[0024] Preferably, the stirring speed in S2 is 400-500 r / min.

[0025] By adopting the above technical solution, the stirring in S2 is carried out by putting the slurry into the stirrer and stirring the stirring speed to 400-500r / min, so that the slurry can better and more evenly adhere to the fiber surface during the stirring process, thereby achieving a better effect on fiber modification.

[0026] Preferably, the fiber added in S2 is polyester fiber.

[0027] By adopting the above technical solution, polyester fiber is a high polymer fiber with properties such as good stability, low moisture absorption, high strength, high flexural elasticity, high elongation, easy mixing, and inertness. Under conditions of large diurnal temperature differences and repeated temperature stress loading, concrete with added polyester fiber can effectively withstand large tensile stress, and the reinforcing effect of the fiber can effectively improve the mechanical properties of concrete.

[0028] Preferably, the modifier in S2 is a self-crosslinking acrylate emulsion.

[0029] By adopting the above technical solution, the self-crosslinking acrylate emulsion has strong adhesion to polyester fibers, which can better graft modified mesoporous silica onto polyester fibers during the fiber modification process.

[0030] Preferably, the admixture is made from the following raw materials in parts by weight, based on the aerated concrete panel:

[0031] Foam stabilizer 0.1-0.15 parts;

[0032] Early strength agent 0.05-0.1 parts;

[0033] Water-reducing agent 0.08-0.15 parts;

[0034] The foam stabilizer is polyacrylamide, the early strength agent is triethanolamine, and the water-reducing agent is a naphthalene-based high-efficiency water-reducing agent. Polyacrylamide can increase the viscosity of foam and reduce its fluidity, thus having a certain foam stabilizing effect. Triethanolamine can promote concrete hydration and improve the early strength of aerated concrete panels. The naphthalene-based high-efficiency water-reducing agent, when added to the concrete mixture, has a dispersing effect on cement particles, which can improve its workability, reduce the unit water consumption, and improve the fluidity of the concrete mixture.

[0035] The aggregate, based on the aerated concrete panel, is made from the following raw materials in parts by weight:

[0036] 22-32 parts sand;

[0037] 20-31 portions of waste brick slag.

[0038] By adopting the above scheme, the particle size of the waste brick slag used in this application is 5.00-5.75mm, and the particle size of the sand is 0.15-4.75mm. The waste brick slag mainly plays a skeleton role and reduces the volume change caused by the drying shrinkage and wet expansion of the cementitious material during the setting and hardening process; the role of the sand is to fill the gaps between the waste brick slag and increase the strength of the concrete.

[0039] Secondly, this application provides a method for preparing high-strength aerated concrete panels, employing the following technical solution: A method for preparing high-strength aerated concrete panels, comprising the following steps:

[0040] The preparation steps using the above technical solution are as follows:

[0041] S1: Aggregate, aluminum powder, gypsum, additives and modified fibers are mixed to obtain a mixture;

[0042] S2: Add water to the mixture and stir continuously until the mixture is uniform to obtain the casting refractory;

[0043] S3: Pour the refractory material into the mold, insert the reinforcing mesh to obtain the slab blank, demold and cut the slab blank, steam cure to obtain autoclaved aerated concrete slab.

[0044] By adopting the above technical solution, firstly, aggregates, aluminum powder, gypsum, lime, admixtures, and modified fibers are mixed evenly. Then, water is added to the mixture and stirred until homogeneous to obtain concrete castable. The castable is poured into a mold, a reinforcing mesh is inserted, and then it is placed at 55-65℃ for 1.5-2.5 hours to obtain a slab blank. The slab blank is demolded and cut, then placed at 175-185℃ and 1-1.2 MPa for 20-24 hours to obtain autoclaved aerated concrete (AAC) slabs. Aluminum powder acts as a foaming agent, giving the concrete more porosity; gypsum acts as a retarder; and lime promotes the formation of hydration gel. Admixtures include a foam stabilizer (polyacrylamide); an early-strength agent (triethanolamine); and a naphthalene-based high-efficiency water-reducing agent. Polyacrylamide makes the foam more durable and stable, triethanolamine improves the early strength of the concrete, and the naphthalene-based high-efficiency water-reducing agent reduces the amount of water used in mixing. Water-reducing agents, as anionic active substances, weaken the ability of fiber surfaces to bind metal ions. However, the addition of catechol-based N-propyne amide helical polymers to modified fibers can enhance the ability of fibers to bind metal ions, thereby increasing the strength of concrete.

[0045] In summary, this application has the following beneficial effects:

[0046] 1. Since this application uses catechol-based N-propyne amide spiral polymer to modify silica, and then uses the modified silica to graft polyester fibers, the effect of the water-reducing agent as an anionic surfactant weakens the adsorption effect of the polyester fiber surface on metal ions. However, the adsorption capacity of the catechol-based N-propyne amide spiral polymer on metal ions enhances the adsorption capacity of the fiber surface on metal ions, thereby increasing the strength of the aerated concrete panel.

[0047] 2. In this application, self-crosslinking acrylate emulsion is preferred as a modifier because self-crosslinking acrylate emulsion has strong adhesion to polyester fibers, which can better graft modified mesoporous silica onto polyester fibers during the fiber modification process.

[0048] 3. Polyester fiber was chosen as the modified fiber in this application because it is a high-polymer fiber with good stability, low moisture absorption, high strength, high flexural elasticity, high elongation, easy mixing, and inertness. Under conditions of large diurnal temperature differences and repeated temperature stress loading, concrete with added polyester fiber can effectively withstand large tensile stress, and the reinforcing effect of the fiber can effectively improve the mechanical properties of aerated concrete panels. Detailed Implementation

[0049] The present application will be further described in detail below with reference to the embodiments.

[0050] Example of modified fiber preparation

[0051] The particle size range of the catechol-based N-propyne amide helical polymer powder is 0.1-0.5 nm;

[0052] Mesoporous silica pore size: particle size ratio 1:45, mesoporous silica pore size range: 1-2nm; particle size range: 43-90nm.

[0053] Polyester fiber diameter: length ratio 1:50; cross-sectional diameter range of polyester fiber: 6.8-8µm; length range of polyester fiber: 340-4000µm.

[0054] Preparation Example 1

[0055] The preparation of modified fibers includes the following steps:

[0056] S1: First, 2 kg of catechol-based N-propyne amide spiral polymer was ground in a grinder to achieve a particle size range of 0.1-0.5 nm. The catechol-based N-propyne amide spiral polymer powder and 7.6 kg of mesoporous silica were added to a ball mill and the ball milling speed was adjusted to 800 r / min for 30 min. The ball-milled powder was then sieved through a filter screen with a pore size of 43 nm to obtain modified mesoporous silica.

[0057] S2: Add the modified mesoporous silica obtained in S1 to 8L of self-crosslinking acrylate emulsion and pour it into a stirrer. Set the speed to 500r / min and start stirring at low speed. During the stirring process, add 4.4kg of polyester fiber and continue stirring until the mixture is uniform to obtain the modified fiber.

[0058] Preparation Example 2

[0059] The preparation of modified fibers includes the following steps:

[0060] S1: First, 1.6 kg of catechol-based N-propyne amide spiral polymer was ground in a grinder to achieve a particle size range of 0.1-0.5 nm. The catechol-based N-propyne amide spiral polymer powder and 8.4 kg of mesoporous silica were added to a ball mill and ball milled at 800 r / min for 30 min. The ball-milled powder was then sieved through a filter screen with a pore size of 43 nm to obtain modified mesoporous silica.

[0061] S2: Add the modified mesoporous silica obtained in S1 to 10L of self-crosslinking acrylate emulsion and pour it into a stirrer. Set the speed to 500r / min and start stirring at low speed. During the stirring process, add 4kg of polyester fiber and continue stirring until the mixture is uniform to obtain the modified fiber.

[0062] Preparation Example 3

[0063] The preparation of modified fibers includes the following steps:

[0064] S1: First, 1.8 kg of catechol-based N-propyne amide spiral polymer was ground in a grinder to achieve a particle size range of 0.1-0.5 nm. The catechol-based N-propyne amide spiral polymer powder and 8 kg of mesoporous silica were added to a ball mill and the ball milling speed was adjusted to 800 r / min for 30 min. The ball-milled powder was then sieved through a filter screen with a pore size of 43 nm to obtain modified mesoporous silica.

[0065] S2: Add the modified mesoporous silica obtained in S1 to 9L of self-crosslinking acrylate emulsion and pour it into a stirrer. Set the speed to 500r / min and start stirring at low speed. During the stirring process, add 4.2kg of polyester fiber and continue stirring until the mixture is uniform to obtain the modified fiber.

[0066] Example

[0067] Example 1

[0068] A method for preparing high-strength aerated concrete panels:

[0069] S1: Mix cement, sand, waste brick slag, quicklime, gypsum, aluminum powder, polyacrylamide, triethanolamine, naphthalene-based high-efficiency water-reducing agent and modified fiber for 5 minutes to obtain a mixture;

[0070] S2: Add the mixture to the mixer and mix for 10 minutes. Adjust the mixer speed to 100 r / min. Add water to the mixer in batches during the mixing process and continue mixing for 15 minutes to obtain the casting material.

[0071] S3: Pour the refractory material into the mold, insert the reinforcing mesh, and then cure it at 60℃ to obtain the plate blank. Demold the plate blank, cut it, and then steam it at 180℃ for 22 hours to obtain the aerated concrete plate.

[0072] In this embodiment, the modified fiber is the modified fiber obtained in Preparation Example 3, and the cement is ordinary commercially available silicate cement.

[0073] Example 2-3

[0074] A high-strength aerated concrete panel differs from Example 1 in that its raw material components and their corresponding weight parts are shown in Table 2.

[0075] Table 2. Raw materials and their weights (kg) in Examples 1-3

[0076] Component Example 1 Example 2 Example 3 Sand 22 30 26 Waste brick 31 20 25 Quicklime 7 13 10 Cement 13 8 10 Aluminum powder 0.1 0.05 0.07 Gypsum 40 55 48 Foam stabilizer 0.15 0.1 0.13 Early strength agent 0.05 0.1 0.07 Water reducing agent 0.15 0.08 0.1 Modified fiber 1 3 2 Water 70 50 60

[0077] Example 4

[0078] A high-strength aerated concrete panel differs from Example 3 in that the raw material is the modified fiber obtained in Preparation Example 1.

[0079] Example 5

[0080] A high-strength aerated concrete panel differs from Example 3 in that the raw material is the modified fiber obtained in Preparation Example 2.

[0081] Example 6

[0082] A high-strength aerated concrete panel differs from Example 3 in that only 25 kg of waste brick slag is selected as the aggregate.

[0083] Example 7

[0084] A high-strength aerated concrete panel differs from Example 3 in that only 27 kg of sand is selected as the aggregate.

[0085] Example 8

[0086] A high-strength aerated concrete board differs from Example 3 in that only 0.13 kg of polyacrylamide is selected as the admixture.

[0087] Example 9

[0088] A high-strength aerated concrete panel differs from Example 3 in that only 0.07 kg of triethanolamine is selected as the admixture.

[0089] Example 10

[0090] A high-strength aerated concrete panel differs from Example 3 in that only 0.1 kg of naphthalene-based high-efficiency water-reducing agent is selected as the admixture.

[0091] Comparative Example

[0092] Comparative Example 1

[0093] A high-strength aerated concrete panel differs from Example 3 in that the modified fiber is replaced with ordinary plant fiber.

[0094] S1: Mix cement, sand, waste brick slag, quicklime, gypsum, aluminum powder, polyacrylamide, triethanolamine, naphthalene-based high-efficiency water-reducing agent and modified fiber for 5 minutes to obtain a mixture;

[0095] S2: Add the mixture to the mixer and mix for 10 minutes. Adjust the mixer speed to 100 r / min. Add water to the mixer in batches during the mixing process and continue mixing for 15 minutes to obtain the casting material.

[0096] S3: Pour the refractory material into the mold, insert the reinforcing mesh, and then cure it at 60℃ to obtain the plate blank. Demold the plate blank, cut it, and then steam it at 180℃ for 22 hours to obtain the aerated concrete plate.

[0097] Comparative Example 2

[0098] A high-strength aerated concrete panel, which differs from Example 3 in that it does not include modified fibers.

[0099] S1: Mix cement, sand, waste brick slag, quicklime, gypsum, aluminum powder, polyacrylamide, triethanolamine, naphthalene-based high-efficiency water-reducing agent and modified fiber for 5 minutes to obtain a mixture;

[0100] S2: Add the mixture to the mixer and mix for 10 minutes. Adjust the mixer speed to 100 r / min. Add water to the mixer in batches during the mixing process and continue mixing for 15 minutes to obtain the casting material.

[0101] S3: Pour the refractory material into the mold, insert the reinforcing mesh, and then cure it at 60℃ to obtain the plate blank. Demold the plate blank, cut it, and then steam it at 180℃ for 22 hours to obtain the aerated concrete plate.

[0102] Comparative Example 3

[0103] A high-strength aerated concrete panel differs from Example 3 in that the modified fiber is replaced with ordinary polyester fiber.

[0104] S1: Mix cement, sand, waste brick slag, quicklime, gypsum, aluminum powder, polyacrylamide, triethanolamine, naphthalene-based high-efficiency water-reducing agent and modified fiber for 5 minutes to obtain a mixture;

[0105] S2: Add the mixture to the mixer and mix for 10 minutes. Adjust the mixer speed to 100 r / min. Add water to the mixer in batches during the mixing process and continue mixing for 15 minutes to obtain the casting material.

[0106] S3: Pour the refractory material into the mold, insert the reinforcing mesh, and then cure it at 60℃ to obtain the plate blank. Demold the plate blank, cut it, and then steam it at 180℃ for 22 hours to obtain the aerated concrete plate.

[0107] Performance testing

[0108] 1. Compressive strength test method

[0109] First, inspect the appearance of the specimen. Measure the dimensions of the specimen and calculate its compressive area. Next, place the specimen at the center of the lower platen of the material testing machine, ensuring the compressive direction is perpendicular to the expansion direction of the product. Start the testing machine. When the upper platen approaches the specimen, adjust the ball seat to ensure even contact. Apply the load continuously and uniformly at a rate of (2.0±0.5) kN / s until the specimen fails. Record the failure load (p1). Set up multiple sets of specimens and calculate the compressive strength using the following formula, obtaining the average value.

[0110] Formula for calculating compressive strength:

[0111]

[0112] f ∝ —Specimen compressive strength (MPa)

[0113] p1——Destruction load (N)

[0114] A1—Compression area of ​​the specimen (mm²) 2 )

[0115] The length, width, and height of the test block are all set to 100 mm.

[0116] 2. Flexural Strength Test Method

[0117] First, inspect the appearance of the specimen. Measure its width and height at the center of the specimen, accurate to 1 mm. Place the specimen on the bending support rollers, with a support point spacing of 300 mm. Start the testing machine. When the pressure roller is almost close to the specimen, adjust the pressure roller and support rollers to ensure even contact. The dimensional deviation of all spacing should not exceed ±1 mm. The two support rollers and two pressure rollers in contact with the specimen should have an arc-shaped top surface with a diameter of 30 mm and should be at least 10 mm longer than the width of the specimen. Three of these rollers (one support roller and two pressure rollers) should be able to roll and tilt back and forth as much as possible. Apply a continuous and uniform load at a speed of (0.20 ± 0.05) kN / s until the specimen fails. Record the failure load (p) and failure location. Set up multiple sets of specimens and calculate the flexural strength using the following formula, obtaining the average value.

[0118] Formula for calculating flexural strength:

[0119]

[0120] f f —Flexural strength of the specimen (MPa)

[0121] p — Destructive load (N)

[0122] b — Specimen width (mm)

[0123] h — Specimen height (mm)

[0124] L – Support spacing, i.e., span (mm), accurate to 1mm.

[0125] The length, width, and height of the test block are set to 400mm, 100mm, and 100mm, respectively.

[0126] Table 3 Performance test results

[0127] 28d compressive strength (MPa) 28d flexural strength (MPa) Example 1 9.9 1.24 Example 2 9.6 1.21 Example 3 10.3 1.27 Example 4 10.0 1.22 Example 5 10.0 1.21 Example 6 8.2 0.94 Example 7 8.8 1.10 Example 8 8.9 1.10 Example 9 9.5 1.18 Example 10 9.2 1.12 Comparative Example 1 4.9 0.59 Comparative Example 2 4.6 0.53 Comparative Example 3 6.6 0.88

[0128] As can be seen from Examples 1-10 and Comparative Examples 1 and 3, and Table 3, the strength, stability, and flexural elasticity of polyester fibers are superior to those of ordinary plant fibers. This enhances the bonding ability of the modified fibers to the castable, strengthens the bonding ability of the castable to the reinforcing mesh during casting, and greatly improves the flexural strength of the formed plate. By loading the N-propyne propyne helical polymer of hydroquinone groups onto the surface of polyester fibers, the metal ions in the mixture are adsorbed onto the surface of the modified fibers, thereby making the modified fibers more bonded to the mixture and thus improving the strength.

[0129] As can be seen from Examples 1-3 and 6-7 and Table 3, by mixing sand and waste brick slag, the waste brick slag acts as coarse aggregate to support the mixture, while the sand acts as fine aggregate to fill the gaps between the waste brick slag. When waste brick slag is used alone as aggregate, there will be gaps and the density is smaller than when sand is used alone as aggregate. Therefore, the strength is the highest when waste brick slag and sand are mixed, and the strength is the lowest when waste brick slag is used alone.

[0130] Combining Examples 1-3 and Examples 8-10 with Table 3, it can be seen that both the accelerator and the water-reducing agent enhance the strength of concrete to a certain extent. However, the water-reducing agent's enhancement effect is not as good as that of the accelerator. This also reflects that the problem of the water-reducing agent inhibiting the adsorption of metal ions on the fiber surface has been successfully solved through fiber modification, which is directly reflected in the strength of the aerated concrete panel. The foam stabilizer plays a role in maintaining the stability of air bubbles in the concrete. The more air bubbles there are in the concrete, the lower the strength will be. Therefore, the foam stabilizer has no effect on enhancing the strength of concrete.

[0131] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A high strength aerated panel, characterised in that, The aerated board is made of raw materials including the following weight parts: Aggregate 42-63 parts; Quicklime 7-13 parts; Cement 8-13 parts; Aluminum powder 0.05-0.1 parts; Gypsum 40-55 parts; Admixtures 0.2-0.4 parts; Modified fiber 1-3 parts; Water 50-70 parts; The modified fiber is a catechol group N-propargyl amide helical polymer loaded on the surface of the fiber; The preparation of the modified fiber includes the following steps: S1: First, grind the catechol group N-propargyl amide helical polymer, add the catechol group N-propargyl amide helical polymer powder and mesoporous silica to a ball mill for ball milling, sieve the powder after ball milling to obtain modified mesoporous silica; S2: Add the modified mesoporous silica in S1 to a modifier and stir, stir the slurry at low speed, and add the fiber during stirring, and then obtain the modified fiber after uniform stirring; The fiber added in S2 is polyester fiber.

2. The high-strength air-entrained panel according to claim 1, characterized in that: The particle size of the catechol group N-propargyl amide helical polymer powder in S1 is less than 2nm.

3. The high-strength air-entrained panel according to claim 1, wherein: The stirring speed in S2 is 400-500r / min.

4. The high-strength, gas-infused panel of claim 1, wherein: The modifier in S2 is a self-crosslinking acrylate emulsion.

5. A high-strength air-entrained panel according to claim 1, wherein: The admixtures are made of raw materials including the following weight parts based on the aerated board: Foam stabilizer 0.1-0.15 parts; Early strength agent 0.05-0.1 parts; Water reducing agent 0.08-0.15 parts.

6. A high-strength air-entrained panel according to claim 1, characterized in that: The aggregate is made of raw materials including the following weight parts based on the aerated board: Sand 22-32 parts; Waste brick slag 20-31 parts.

7. A method of making a high strength air-entrained panel as claimed in any one of claims 1 to 6 wherein: The preparation steps are as follows: S1: Stir the aggregate, aluminum powder, gypsum, admixtures and modified fiber to obtain a mixture; S2: Add water to the mixture and continuously stir until uniform to obtain a casting material; S3: Pour the casting material into a mold, insert a steel mesh, obtain a board blank, demold and cut the board blank, steam and cure to obtain an autoclaved aerated concrete board.

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