A ternary cementitious system foam concrete and a preparation method thereof

Abstract

This invention belongs to the field of concrete materials technology, specifically disclosing a ternary cementitious foamed concrete system and its preparation method. The invention involves thoroughly mixing cement, desulfurization ash, slag powder, and alkali-resistant glass fiber to obtain a dry powder; mixing a water-reducing agent, a stabilizing agent, and a portion of water to obtain a composite admixture solution; mixing the composite admixture solution with the dry powder to obtain a concrete slurry; mixing a foaming agent, a foam stabilizer, and the remaining water to foam the concrete to obtain a stable foam; and then mixing the stable foam with the concrete slurry to obtain the ternary cementitious foamed concrete system. This invention, by limiting the optimal mix proportion, achieves efficient resource utilization of desulfurization ash and slag powder, effectively alleviating the environmental pressure of solid waste storage, improving the strength of foamed concrete, and reducing the manufacturing cost of foamed concrete.

Description

Technical Field

[0001] This invention relates to the field of concrete materials technology, and in particular to a ternary cementitious foamed concrete and its preparation method. Background Technology

[0002] Desulfurization ash is a byproduct of industrial flue gas desulfurization processes, while slag powder is made from molten slag produced during blast furnace ironmaking. Both are important components of industrial solid waste. Currently, the annual emissions of desulfurization ash and slag powder are enormous, but most of it is not effectively utilized and remains idle and stockpiled for extended periods. This solid waste disposal model not only causes environmental pollution and resource waste but also, to some extent, restricts the sustainable development of the steel industry.

[0003] Foamed concrete is a lightweight, porous material formed through mechanical or chemical foaming. Its high air bubble content results in a generally low density, providing controllable applicable strength for the same volume while significantly reducing its weight. Compared to ordinary concrete, the amount of cement used is also greatly reduced, thus significantly lowering construction costs. However, its high porosity structure also leads to significant shortcomings in mechanical properties, such as low compressive strength, high brittleness, and a tendency for large drying shrinkage and cracking due to the low proportion of paste, limiting its direct application in load-bearing structures.

[0004] However, existing foamed concrete mostly uses ordinary Portland cement as the sole cementing material. Although a large amount of industrial solid waste (such as fly ash and slag) can be introduced as admixtures, research on the synergistic utilization of desulfurization ash and slag powder is still insufficient. Desulfurization ash contains components such as calcium sulfite, calcium sulfate, and a small amount of free calcium oxide. Its hydration activity is low, and there is a risk of poor volume stability. When it directly replaces cement in large quantities to prepare foamed concrete, it easily leads to slow early strength development, prolonged setting time, and even cracking failure. Although slag powder has potential hydraulic properties, it requires alkaline activation under room temperature conditions to fully exert its cementing performance.

[0005] Currently, there is no systematic technical solution for preparing high-volume solid waste-based foamed concrete by using desulfurization ash and slag powder as the main cementitious components and optimizing the mix proportions and foaming process. Therefore, how to achieve large-scale synergistic utilization of desulfurization ash and slag powder to prepare foamed concrete that combines lightweight, high strength, and good volume stability is not only an urgent need for solid waste resource utilization technology, but also a key to expanding the application of foamed concrete in non-load-bearing and even partially load-bearing fields. Summary of the Invention

[0006] In view of this, the present invention provides a ternary cementitious system foamed concrete and its preparation method to solve the problems of the difficulty in resource utilization of desulfurization ash and slag powder, and the poor mechanical properties of foamed concrete.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A ternary cementitious foamed concrete comprises the following components in parts by weight: 100 parts cement, 58.53~72.1 parts water, 6.8~23.62 parts desulfurization ash, 23.21~31.50 parts slag powder, 0.72~2.21 parts alkali-resistant glass fiber, 0.1~0.15 parts foaming agent, 0.68~0.79 parts water-reducing agent, 0.16~0.19 parts precipitant, and 0.16~0.19 parts foam stabilizer.

[0008] Preferably, the cement includes one or more of silicate cement, aluminate cement, and sulfoaluminate cement.

[0009] Preferably, the desulfurization ash is dry desulfurization ash with a density of 2.3~2.8 g / cm³. 3 The bulk density is 750~900 kg / m³ 3 The average particle size is 2~3.5μm, and the specific surface area is 520~540m². 2 / kg.

[0010] Preferably, the density of the slag powder is 2.7~3.1 g / cm³. 3 The bulk density is 900~1050 kg / m³ 3 The particle size is 30~60μm, and the specific surface area is 410~430m². 2 / kg.

[0011] Preferably, the alkali-resistant glass fiber has a length of 5.5~6.5 mm, a filament diameter of 10~18 μm, a specific gravity of 2.6~2.75, a loss on ignition of 0.4~0.8%, and a moisture content of ≤0.5%.

[0012] Preferably, the foaming agent includes one or more of animal protein foaming agents, plant protein foaming agents, hydrogen peroxide, and anionic surfactants.

[0013] Preferably, the foam stabilizer includes one or more of tea saponin, fatty alcohol, alkylolamide, and silicone polyether emulsion.

[0014] Another object of the present invention is to provide a method for preparing ternary cementitious foamed concrete, comprising the following steps: 1) Thoroughly mix cement, desulfurization ash, slag powder, and alkali-resistant glass fiber to obtain dry powder; mix water-reducing agent, precipitant, and some water to obtain composite admixture solution; mix composite admixture solution with dry powder to obtain concrete paste; 2) Mix the foaming agent, foam stabilizer, and the remaining water to produce stable foam; 3) The stabilized foam is mixed with the concrete slurry to obtain ternary cementitious foamed concrete; There is no specific order requirement between steps 1) and 2).

[0015] Preferably, the sum of the mass of the partial water and the remaining water equals the total water consumption; The mass ratio of the foaming agent to the remaining water is 1:40~60.

[0016] Preferably, the density of the stabilized foam in step 2) is 35~40 kg / m³. 3 .

[0017] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial effects: 1. This invention investigates the effects of dry density grade, water-to-material ratio, desulfurization ash content, and ARGF content on the compressive strength, splitting tensile strength, and thermal conductivity of foamed concrete. Ultimately, it determines an optimized mix proportion, resulting in ternary cementitious foamed concrete with excellent comprehensive mechanical properties. This invention not only provides a mix proportioning basis for the engineering application of cement-desulfurization ash-slag powder-based (ternary cementitious system) foamed concrete, but also promotes the resource utilization of desulfurization ash and slag powder, alleviates the environmental pressure of solid waste storage, and simultaneously improves the structural performance of foamed concrete while reducing production costs.

[0018] 2. This invention uses desulfurization ash and slag powder to replace part of the cement, and incorporates alkali-resistant glass fiber (ARGF) to prepare cement-desulfurization ash-slag powder-based foamed concrete. It optimizes material properties through synergistic effects of its components: cement hydration provides an initial alkaline environment and structural framework for the system, stimulating the pozzolanic reaction of the slag powder; SO3 and CaO in the desulfurization ash further activate the slag powder, generating ettringite with filling and micro-expansion properties, inhibiting material shrinkage cracking; continuous hydration of the slag powder forms a dense CASH gel, improving the later-stage strength and micro-density of the matrix. Furthermore, the incorporation of alkali-resistant glass fiber (ARGF) promotes its uniform dispersion in the slurry. Through mechanical interlocking and interfacial bonding between the fiber and cementitious particles, the aggregate and fiber network are combined into a continuous whole, thereby significantly improving the compressive strength and splitting tensile strength of the foamed concrete. Detailed Implementation

[0019] This invention provides a ternary cementitious foamed concrete system, comprising the following components in parts by weight: 100 parts cement, 58.53-72.1 parts water, 6.8-23.62 parts desulfurization ash, 23.21-31.50 parts slag powder, 0.72-2.21 parts alkali-resistant glass fiber, 0.1-0.15 parts foaming agent, 0.68-0.79 parts water-reducing agent, 0.16-0.19 parts stabilizing agent, and 0.16-0.19 parts foam stabilizer. Under the above proportions, the specific amounts of water added can be 60, 62, 65, 68, 70, or 72 parts; the specific amounts of desulfurization ash added can be 8, 10, 12, 15, 18, 20, or 22 parts. The specific amounts of slag powder added can be 25, 28, 29, 30, or 31 parts; the specific amounts of alkali-resistant glass fiber added can be 0.8, 1, 1.2, 1.4, 1.5, 1.6, 1.8, 2, or 2.2 parts; the specific amounts of foaming agent added can be 0.11, 0.12, 0.13, or 0.14 parts; the specific amounts of water-reducing agent added can be 0.7, 0.72, 0.75, or 0.78 parts; the specific amounts of stabilizing adhesive added can be 0.16, 0.17, 0.18, or 0.19 parts; and the specific amounts of foam stabilizer added can be 0.16, 0.17, 0.18, or 0.19 parts.

[0020] In this invention, the preferred composition of the ternary cementitious foamed concrete is: 100 parts cement, 69.96 parts water, 23.44 parts desulfurization ash, 31.25 parts slag powder, 0.78 parts alkali-resistant glass fiber, 0.12 parts foaming agent, 0.78 parts water-reducing agent, 0.19 parts precipitant, and 0.19 parts foam stabilizer.

[0021] In this invention, the preferred composition of the ternary cementitious foamed concrete is: 100 parts cement, 61.34 parts water, 6.85 parts desulfurization ash, 27.40 parts slag powder, 2.05 parts alkali-resistant glass fiber, 0.15 parts foaming agent, 0.68 parts water-reducing agent, 0.16 parts precipitant, and 0.16 parts foam stabilizer.

[0022] In this invention, the cement includes one or more of silicate cement, aluminate cement and sulfoaluminate cement.

[0023] In this invention, the desulfurization ash is dry desulfurization ash with a density of 2.3~2.8 g / cm³. 3 Specifically, it can be 2.4 g / cm³. 3 2.5g / cm 3 2.52g / cm 3 2.6g / cm 3 2.7g / cm 3 The bulk density is 750~900 kg / m³.3 Specifically, it can be 760 kg / m 3 780kg / m 3 800kg / m 3 815kg / m 3 820kg / m 3 850kg / m 3 880kg / m 3 The average particle size is 2~3.5μm, specifically 2.2μm, 2.4μm, 2.5μm, 2.6μm, 2.8μm, 3μm, 3.2μm, and 3.4μm, with a specific surface area of ​​520~540m². 2 / kg, specifically 525m 2 / kg, 530m 2 / kg, 535m 2 / kg.

[0024] In this invention, the density of the slag powder is 2.7~3.1 g / cm³. 3 Specifically, it can be 2.8 g / cm³. 3 2.9g / cm 3 3g / cm 3 The bulk density is 900~1050 kg / m³ 3 Specifically, it can be 920 kg / m 3 940kg / m 3 950kg / m 3 960kg / m 3 980kg / m 3 982kg / m 3 1000kg / m 3 The particle size is 30~60μm, specifically 35μm, 40μm, 45μm, 50μm, and 55μm, with a specific surface area of ​​410~430m². 2 / kg, specifically 415m 2 / kg, 420m 2 / kg, 422m 2 / kg, 425m 2 / kg.

[0025] In this invention, the alkali-resistant glass fiber has a length of 5.5~6.5mm, specifically 5.6mm, 5.8mm, 6mm, 6.2mm, or 6.4mm; a precursor fiber diameter of 10~18μm, specifically 11μm, 12μm, 13μm, 14μm, 15μm, 16μm, or 17μm; a specific gravity of 2.6~2.75, specifically 2.62, 2.65, 2.68, 2.7, or 2.72; a loss on ignition of 0.4~0.8%, specifically 0.5%, 0.6%, or 0.7%; and a moisture content ≤0.5%, specifically 0.1%, 0.2%, 0.3%, or 0.4%.

[0026] In this invention, the foaming agent includes one or more of animal protein foaming agents, plant protein foaming agents, hydrogen peroxide, and anionic surfactants.

[0027] In this invention, the foam stabilizer includes one or more of tea saponins, fatty alcohols, alkyl alcohol amides, and silicone polyether emulsions.

[0028] This invention also provides a method for preparing ternary cementitious foamed concrete, comprising the following steps: 1) Thoroughly mix cement, desulfurization ash, slag powder, and alkali-resistant glass fiber to obtain dry powder; mix water-reducing agent, precipitant, and some water to obtain composite admixture solution; mix composite admixture solution with dry powder to obtain concrete paste; 2) Mix the foaming agent, foam stabilizer, and the remaining water to produce stable foam; 3) Mix the stabilized foam with the concrete slurry to obtain ternary cementitious foamed concrete.

[0029] In this invention, the sum of the mass of the partial water and the remaining water is equal to the total water consumption, and the mass ratio of the foaming agent to the remaining water is 1:40~60, preferably 1:45~55, and more preferably 1:50.

[0030] In this invention, the density of the stabilized foam described in step 2) is 35~40 kg / m³. 3 Specifically, it can be 36kg / m 3 37kg / m 3 38kg / m 3 39kg / m 3 .

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] Cement: Conch P·O 42.5 grade ordinary Portland cement, with an apparent density of 3000 m³ / s. 2 / kg, loss on ignition 1.62%, composition CaO 61.8%, Fe2O3 2.5%, SiO2 21.4%, MgO 1.6%, MnO 1.6%, Al2O3 5.8%, TiO2 0.4%; Desulfurization ash: Dry desulfurization ash, density 2.52 g / cm³ 3 Bulk density 815 kg / m³ 3 The average particle size is 2.8 μm, and the specific surface area is 536 m². 2 / kg, composition: CaO 55.41%, SO3 26.52%, Fe2O3 1.32%, SiO2 5.78%, MgO 0.95%, Al2O3 3.91%, Na2O 1.33%, balance impurities (mass ratio); Slag powder: density 2.9 g / cm³ 3 Bulk density 982 kg / m³ 3 Particle size 45μm, specific surface area 422m² 2 / kg; Composition: CaO 39.51%, SiO2 33.22%, MgO 8.96%, SO3 1.80%, Al2O3 16.04%, balance impurities (mass ratio); Alkali-resistant glass fiber: 6mm in length, 14μm in diameter, 2.68 in specific gravity, 0.6% loss on ignition, and 0.2% moisture content; Foaming agent: Animal protein composite foaming agent (manufacturer: Henan Huatai New Material Co., Ltd., model: HTW-I), foamed form is tough and semi-transparent, density 1.15g / cm³ 3 It has a foaming ratio of 50 times and a water absorption rate of 18%. Water-reducing agent: β-naphthalenesulfonate formaldehyde condensate naphthalene-based water-reducing agent, sodium sulfate content is 18%; Foam stabilizer: Tea saponin foam stabilizer, HLB value 16.

[0034] The composition is as follows: 100 parts cement, 58.53 parts water, 14.71 parts desulfurization ash, 29.41 parts slag powder, 2.21 parts alkali-resistant fiber, 0.11 parts foaming agent, 0.74 parts water-reducing agent, 0.18 parts precipitant, and 0.18 parts foam stabilizer.

[0035] S1: The above amounts of cement, desulfurization ash, slag powder and alkali-resistant glass fiber are thoroughly mixed to obtain dry powder. At the same time, water-reducing agent and precipitant are added to water and thoroughly mixed to obtain composite admixture solution. Finally, the composite admixture solution is added to the dry powder and thoroughly mixed to obtain concrete paste. S2: Dilute the above-mentioned amount of foaming agent with water at a dilution ratio of 1:50 (the sum of the dilution water and the water used in step S1 equals the total water volume), then add the foam stabilizer and use a foaming device to obtain a density of 40 kg / m³. 3 Stable bubbles; S3: Add the prepared stable foam to the concrete slurry and stir for 5 minutes to obtain cement-desulfurized ash-slag micro powder-based foamed concrete (ternary cementitious system foamed concrete). S4: Pour cement-desulfurization ash-slag micro-powder based foamed concrete into a mold, cover the mold with plastic film, let it stand for 24 hours, and then demold to obtain a cement-desulfurization ash-slag micro-powder based foamed concrete test block. (Length, width, and height are 150 mm respectively) 150 150 (mm)).

[0036] Example 2

[0037] The only difference between this embodiment and Example 1 is the adjustment of the component dosage, as detailed below: The composition is as follows: 100 parts cement, 69.96 parts water, 23.44 parts desulfurization ash, 31.25 parts slag powder, 0.78 parts alkali-resistant fiber, 0.12 parts foaming agent, 0.78 parts water-reducing agent, 0.19 parts precipitant, and 0.19 parts foam stabilizer.

[0038] Example 3

[0039] The only difference between this embodiment and Example 1 is the adjustment of the component dosage, as detailed below: The composition is as follows: 100 parts cement, 67.69 parts water, 6.80 parts desulfurization ash, 27.21 parts slag powder, 1.36 parts alkali-resistant fiber, 0.12 parts foaming agent, 0.68 parts water-reducing agent, 0.16 parts precipitant, and 0.16 parts foam stabilizer.

[0040] Example 4

[0041] The only difference between this embodiment and Example 1 is the adjustment of the component dosage, as detailed below: The composition is as follows: 100 parts cement, 62.68 parts water, 23.62 parts desulfurization ash, 31.50 parts slag powder, 1.57 parts alkali-resistant fiber, 0.12 parts foaming agent, 0.79 parts water-reducing agent, 0.19 parts precipitant, and 0.19 parts foam stabilizer.

[0042] Example 5

[0043] The only difference between this embodiment and Example 1 is the adjustment of the component dosage, as detailed below: The composition is as follows: 100 parts cement, 61.34 parts water, 6.85 parts desulfurization ash, 27.40 parts slag powder, 2.05 parts alkali-resistant fiber, 0.15 parts foaming agent, 0.68 parts water-reducing agent, 0.16 parts precipitant, and 0.16 parts foam stabilizer.

[0044] Example 6

[0045] The only difference between this embodiment and Example 1 is the adjustment of the component dosage, as detailed below: The composition is as follows: 100 parts cement, 72.10 parts water, 14.49 parts desulfurization ash, 28.99 parts slag powder, 0.72 parts alkali-resistant fiber, 0.10 parts foaming agent, 0.72 parts water-reducing agent, 0.17 parts precipitant, and 0.17 parts foam stabilizer.

[0046] Comparative Example 1

[0047] The only difference between this embodiment and Example 1 is the adjustment of the component dosage, as detailed below: The composition is as follows: 100 parts cement, 53.78 parts water, 6.76 parts desulfurization ash, 27.03 parts slag powder, 0.68 parts alkali-resistant fiber, 0.17 parts foaming agent, 0.68 parts water-reducing agent, 0.16 parts precipitant, and 0.16 parts foam stabilizer.

[0048] Comparative Example 2

[0049] The only difference between this embodiment and Example 1 is the adjustment of the component dosage, as detailed below: The composition is as follows: 100 parts cement, 78.97 parts water, 23.81 parts desulfurization ash, 31.75 parts slag powder, 2.38 parts alkali-resistant fiber, 0.12 parts foaming agent, 0.79 parts water-reducing agent, 0.19 parts precipitant, and 0.19 parts foam stabilizer.

[0050] According to the Technical Specification for Application of Foamed Concrete (JGJ / T 341-2014) and Foamed Concrete (JG / T 266-2011), the performance of the cement-desulfurized ash-slag micro powder-based foamed concrete prepared in Examples 1 to 9 above was tested, and the performance indicators are shown in Table 1.

[0051] Table 1 Performance Index Test Results

[0052] As shown in Table 1, when desulfurized ash is used instead of cement as the cementitious material, the compressive strength of the test blocks increases by approximately 19% when the desulfurized ash content is 15%, compared to 10%. With the increase in desulfurized ash content, slag powder participates in the hydration reaction of the desulfurized ash, forming a network-like skeleton structure, thus significantly improving the strength performance of DRSFC. Compared to a desulfurized ash content of 10%, the tensile strength of the test blocks increases by 15.3% when the desulfurized ash content is 5%. Under the alkaline-activated environment provided by slag powder, the desulfurized ash can undergo a secondary hydration reaction with the cement hydration products, generating more hydrated calcium silicate gel and hydrated calcium aluminate, significantly enhancing the density of the matrix and directly improving the tensile strength of cement-desulfurized ash-slag powder-based foamed concrete. Compared to a desulfurized ash content of 5%, the thermal insulation performance of the test blocks increases by 23.1% when the desulfurized ash content is 15%. The low density of desulfurization ash and the optimization of pore structure by the pozzolanic reaction work together to increase the internal porosity and refine the pore size of the material, thereby enhancing the thermal insulation capacity of cement-desulfurization ash-slag micro-powder based foamed concrete. Comprehensive analysis reveals the optimal mix proportions for cement-desulfurization ash-slag micro-powder based foamed concrete as follows: dry density grade 1200, water-cement ratio 0.45, desulfurization ash content 5%, and ARGF content 1.5%.

[0053] This invention also includes two additional comparative examples to more intuitively demonstrate the impact of the component dosage ratios on the overall material performance. Because different component dosages result in different dry density grades, calculations show that, compared to Examples 1-3 with a dry density grade of 1000 kg / m³, [the following is a more detailed description of the comparative examples]. 3 Compared with Examples 4-6, the dry density grade is 1200 kg / m³ 3 The dry density grades of Comparative Examples 1 and 2 are only 800 kg / m³. 3 Although some specimens have low thermal conductivity and certain heat preservation advantages, their overall compressive strength and splitting tensile strength are relatively low. This indicates that simply reducing the dry density or unilaterally pursuing a lower thermal conductivity is insufficient to meet the comprehensive requirements of the material for mechanical and heat preservation properties.

[0054] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0055] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ternary cementitious foamed concrete, characterized in that, The components include the following parts by mass: 100 parts cement, 58.53~72.1 parts water, 6.8~23.62 parts desulfurization ash, 23.21~31.50 parts slag powder, 0.72~2.21 parts alkali-resistant glass fiber, 0.1~0.15 parts foaming agent, 0.68~0.79 parts water-reducing agent, 0.16~0.19 parts precipitant, and 0.16~0.19 parts foam stabilizer.

2. The ternary cementitious foamed concrete according to claim 1, characterized in that, The cement includes one or more of silicate cement, aluminate cement, and sulfoaluminate cement.

3. The ternary cementitious foamed concrete according to claim 2, characterized in that, The desulfurization ash is dry desulfurization ash with a density of 2.3~2.8 g / cm³. 3 The bulk density is 750~900 kg / m³ 3 The average particle size is 2~3.5μm, and the specific surface area is 520~540m². 2 / kg.

4. The ternary cementitious foamed concrete according to claim 3, characterized in that, The density of the slag powder is 2.7~3.1 g / cm³. 3 The bulk density is 900~1050 kg / m³ 3 The particle size is 30~60μm, and the specific surface area is 410~430m². 2 / kg.

5. A ternary cementitious foamed concrete according to any one of claims 1 to 4, characterized in that, The alkali-resistant glass fiber has a length of 5.5~6.5mm, a precursor diameter of 10~18μm, a specific gravity of 2.6~2.75, a loss on ignition of 0.4~0.8%, and a moisture content of ≤0.5%.

6. The ternary cementitious foamed concrete according to claim 5, characterized in that, The foaming agent includes one or more of animal protein foaming agents, plant protein foaming agents, hydrogen peroxide, and anionic surfactants.

7. The ternary cementitious foamed concrete according to claim 6, characterized in that, The foam stabilizer includes one or more of tea saponins, fatty alcohols, alkyl alcohol amides, and silicone polyether emulsions.

8. A method for preparing ternary cementitious foamed concrete according to any one of claims 1 to 7, characterized in that, Includes the following steps: 1) Thoroughly mix cement, desulfurization ash, slag powder, and alkali-resistant glass fiber to obtain dry powder; mix water-reducing agent, precipitant, and some water to obtain composite admixture solution; mix composite admixture solution with dry powder to obtain concrete paste; 2) Mix the foaming agent, foam stabilizer, and the remaining water to produce stable foam; 3) The stabilized foam is mixed with the concrete slurry to obtain ternary cementitious foamed concrete; There is no specific order requirement between steps 1) and 2).

9. The method for preparing ternary cementitious foamed concrete according to claim 8, characterized in that, The sum of the mass of the partial water and the remaining water equals the total water consumption; The mass ratio of the foaming agent to the remaining water is 1:40~60.

10. A method for preparing ternary cementitious foamed concrete according to claim 9, characterized in that, The density of the stabilized foam mentioned in step 2) is 35~40 kg / m³. 3 .

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