Concrete foaming agent as well as preparation method and application thereof

Abstract

The invention belongs to the field of concrete admixtures and relates to a concrete foaming agent as well as a preparation method and application thereof. The concrete foaming agent contains a foaming component, a reinforcing agent, a conditioning agent, water and an optional foam stabilizer, wherein the foaming component is organic amine modified sulfonated alkyl glycoside; the organic amine modified sulfonated alkyl glycoside is prepared according to the following method: carrying out hydroxyamination reaction on polyether alkyl glycoside and organic amine, carrying out sulfonation reaction on the obtained hydroxyamination reaction product, and filtering, washing and drying the obtained crude product to obtain the organic amine modified sulfonated alkyl glycoside. The key point of the invention is that the organic amine modified sulfonated alkyl glycoside is introduced into the concrete foaming agent as a foaming component, and the organic amine modified sulfonated alkyl glycoside can enhance the temperature resistance of the concrete foaming agent and endow the concrete foaming agent with good weather resistance, so that the concrete foaming agent still has good foaming and foam stabilizing properties under a relatively high temperature condition.

Description

Technical Field

[0001] The invention belongs to the field of concrete admixtures, and specifically relates to a concrete foaming agent and a preparation method and application thereof. Background Art

[0002] With the global emphasis on energy conservation, emission reduction and sustainable development, the building materials industry has a growing demand for high-performance, environmentally friendly products, and the improvement of its performance has always been a hot topic of research. As an important additive to improve the performance of concrete, concrete foaming agent can significantly change the physical and chemical properties of concrete, such as reducing density, improving thermal insulation performance, and enhancing impermeability, thereby meeting the needs of modern buildings for high-performance, environmentally friendly, and energy-saving materials. The performance of concrete foaming agent directly affects the overall quality and application effect of concrete products.

[0003] However, the existing concrete foaming agents on the market have a single function and are difficult to meet the use requirements in complex environments or specific environmental conditions. For example, CN115286282A discloses a composite concrete foaming agent based on animal protein modification, which is prepared from a basic component, a modified protein-based foaming agent, a foam stabilizing component, an early strength component and water, and uses sodium sulfate and a modified starch-based graft copolymer as an early strength component. Its preparation requires condensation reflux, extraction, ultrasound and other processes. The process is relatively complicated and requires specific conditions, which limits its promotion and application. CN110606687A discloses a method for preparing a composite foam concrete foaming agent, first preparing a soybean protein foaming agent solution, then adding citric acid, a surfactant, a stabilizer and polyvinyl alcohol to the soybean protein foaming agent solution, and obtaining a composite concrete foaming agent after dispersion. CN103553421A discloses an environmentally friendly composite concrete foaming agent and a preparation method thereof, wherein the foaming components are sodium α-olefin sulfonate, alkyl glycoside, sodium fatty acid methyl ester sulfonate, cocamidopropyl betaine, tea saponin, gum arabic, hydroxypropyl methylcellulose, gelatin, polyanionic cellulose, polyvinyl alcohol and sodium bentonite, and the foaming components are complex in composition and single in performance. In addition, although the above concrete fermentation agents have good foaming performance at relatively low temperatures, they have poor temperature resistance and cannot achieve good foaming and foam stabilization performance at relatively high temperatures (above 35°C). Summary of the invention

[0004] The first object of the present invention is to provide a concrete foaming agent having good foaming and foam stabilizing properties under high temperature environment.

[0005] The second object of the present invention is to provide a method for preparing the above concrete foaming agent.

[0006] The third object of the present invention is to provide application of the above concrete foaming agent in the field of construction.

[0007] Specifically, the concrete foaming agent provided by the present invention contains a foaming component, a reinforcing agent, a regulating agent, water and an optional foam stabilizer; the foaming component is an organic amine-modified sulfonated alkyl glycoside; the organic amine-modified sulfonated alkyl glycoside is prepared according to the following method: a polyether alkyl glycoside is subjected to a hydroxylation reaction with an organic amine, and then the obtained hydroxylation reaction product is subjected to a sulfonation reaction with a sulfonating agent, and then the obtained crude product is filtered, washed and dried to obtain the organic amine-modified sulfonated alkyl glycoside.

[0008] The preparation method of the concrete foaming agent provided by the invention comprises uniformly mixing a foaming component, a reinforcing agent, a regulating agent, water and an optional foam stabilizer.

[0009] The key of the present invention is to introduce organic amine-modified sulfonated alkyl glycoside as a foaming component into the concrete foaming agent. The organic amine-modified sulfonated alkyl glycoside can enhance the temperature resistance of the concrete foaming agent, give it good weather resistance, and enable it to still have good foaming and foam stabilization performance under higher temperature conditions.

[0010] In a preferred embodiment, the concrete foaming agent contains a foam stabilizer, and the foam stabilizer is a hyperbranched modified alkylolamide obtained by melt polymerization of cyclic fatty acids, alkanolamines and multifunctional branched monomers in the presence of a catalyst, and its specific hyperbranched structure can synergize with the organic amine-modified sulfonated alkyl glycoside to further improve the strength and durability of the foam, and give the concrete foaming agent better foaming and foam stabilization properties.

[0011] In a preferred embodiment, the regulator contains both a waterproofing agent and a water reducing agent, and the waterproofing agent is sodium methyl silicate and / or water-soluble polyurethane, and the water reducing agent is a foam-stabilizing polycarboxylic acid water reducing agent. In this case, the surface tension of the system can be effectively reduced to form a stable foam, which can further improve the strength and durability of the foam, thereby improving the foaming and foam-stabilizing properties of the concrete foaming agent. DETAILED DESCRIPTION

[0012] The concrete foaming agent provided by the present invention contains a foaming component, a reinforcing agent, a regulator, water and an optional foam stabilizer. The mass ratio of the foaming component, the reinforcing agent, the regulator, water and the foam stabilizer is preferably 100:(2.5-25):(2.5-50):(100-350):(0-50). Based on the content of the foaming agent as 100 parts by weight, the content of the enhancer is preferably 2.5 to 25 parts by weight, such as 2.5, 3, 5, 8, 10, 12, 15, 18, 20, 22, 25 parts by weight or any value therebetween; the content of the regulator is preferably 2.5 to 50 parts by weight, such as 2.5, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 parts by weight or any value therebetween; the content of water is preferably 100 to 350 parts by weight, such as 100, 125, 150, 180, 200, 220, 250, 280, 300, 320, 350 parts by weight or any value therebetween; the content of the foam stabilizer is preferably 0 to 50 parts by weight, such as 0, 1, 2, 2.5, 5, 10, 15, 20, 25 parts by weight or any value therebetween.

[0013] In a preferred embodiment, the content of the foaming component is 20 to 40 parts by weight, such as 20, 22, 25, 28, 30, 32, 35, 38, 40 parts by weight or any value therebetween; the content of the enhancer is 1 to 5 parts by weight, such as 1, 2, 3, 4, 5 parts by weight or any value therebetween; the content of the regulator is 1 to 10 parts by weight, such as 1, 2, 4, 6, 8, 10 parts by weight or any value therebetween; the content of water is 40 to 70 parts by weight, such as 40, 45, 50, 55, 60, 65, 70 parts by weight or any value therebetween; the content of the foam stabilizer is 2 to 10 parts by weight, such as 2, 4, 6, 8, 10 parts by weight or any value therebetween.

[0014] In the present invention, the foaming component is an organic amine-modified sulfonated alkyl glycoside. The organic amine-modified sulfonated alkyl glycoside is prepared by the following method: a polyether alkyl glycoside is subjected to a hydroxylation reaction with an organic amine, and then the obtained hydroxylation reaction product is subjected to a sulfonation reaction with a sulfonating agent, and then the obtained crude product is filtered, washed and dried to obtain an organic amine-modified sulfonated alkyl glycoside. Wherein, the molar ratio of the polyether alkyl glycoside to the organic amine is preferably 1:(0.8-1.2), such as 1:0.8, 1:0.85, 1:0.9, 1:0.95, 1:1, 1:1.05, 1:1.1, 1:1.15, 1:1.2 or any value therebetween. The polyether alkyl glycoside is preferably selected from at least one of octyl glucoside, glyceryl glucoside and dodecyl glucoside. The organic amine is preferably ethylenediamine and / or triethylenetetramine. The molar ratio of the sulfonating agent to the polyether alkyl glycoside is preferably 1:(1.05-1.5), such as 1:1.05, 1:1.1, 1:1.15, 1:1.2, 1:1.25, 1:1.3, 1:1.35, 1:1.4, 1:1.45, 1:1.5 or any value therebetween. The sulfonating agent is preferably aminosulfonic acid and / or sodium sulfite. The conditions of the hydroxylation reaction preferably include a temperature of 50°C to 70°C, such as 50°C, 52°C, 55°C, 58°C, 60°C, 62°C, 65°C, 68°C, 70°C or any value therebetween; and a time of 3h to 5h, such as 3h, 3.2h, 3.4h, 3.6h, 3.8h, 4h, 4.2h, 4.4h, 4.6h, 4.8h, 5h or any value therebetween. The conditions of the sulfonation reaction preferably include a temperature of 40°C to 60°C, such as 40°C, 42°C, 45°C, 48°C, 50°C, 52°C, 55°C, 58°C, 60°C or any value therebetween; and a time of 1h to 2h, such as 1h, 1.2h, 1.4h, 1.6h, 1.8h, 2h or any value therebetween. The sulfonation reaction is preferably carried out in the presence of a catalyst. The catalyst is preferably vanadium oxide and / or boron trifluoride.

[0015] In the present invention, the reinforcing agent is preferably at least one selected from nano-silicon dioxide, nano-carbonate and nano-titanium dioxide.

[0016] In the present invention, the regulator may be a waterproofing agent and / or a water reducing agent, preferably containing both a waterproofing agent and a water reducing agent. Among them, the waterproofing agent is preferably sodium methyl silicate and / or water-soluble polyurethane. The water reducing agent is preferably a foam-stabilizing polycarboxylic acid water reducing agent. The number average molecular weight of the foam-stabilizing polycarboxylic acid water reducing agent is preferably 30,000 to 50,000, such as 30,000, 32,000, 35,000, 38,000, 40,000, 42,000, 45,000, 48,000, 50,000 or any value therebetween.

[0017] In a specific embodiment, the foam-stabilizing polycarboxylic acid water-reducing agent is prepared by free radical polymerization of a polyether monomer, a functional monomer and an unsaturated acid. Among them, the polyether monomer is preferably isopentanol polyoxyethylene ether and / or ethylene glycol monovinyl polyethylene glycol ether. The functional monomer is preferably a C1-C5 fluorinated hydrocarbon compound and / or a phosphate compound. The unsaturated acid is preferably acrylic acid and / or methacrylic acid. In addition, the weight parts of the polyether monomer, the functional monomer and the unsaturated acid are preferably (180-200): (1-6): (15-30). Specifically, the amount of the polyether monomer can be, for example, 180-200 parts by weight, such as 180, 182, 185, 188, 190, 192, 195, 198, 200 parts by weight or any value therebetween. The amount of the functional monomer can be, for example, 1 to 6 parts by weight, such as 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6 parts by weight or any value therebetween. The amount of the unsaturated acid can be, for example, 15 to 30 parts by weight, such as 15, 18, 20, 22, 25, 28, 30 parts by weight or any value therebetween. In addition, the conditions for the free radical polymerization reaction preferably include a temperature of 10°C to 30°C, such as 10°C, 15°C, 20°C, 25°C, 30°C or any value therebetween; a time of 1.5h to 3h, such as 1.5h, 1.8h, 2h, 2.2h, 2.5h, 2.8h, 3h or any value therebetween. In addition, the free radical polymerization reaction is carried out under the protection of an inert gas. The inert gas can be exemplified by nitrogen, helium or argon.

[0018] In the present invention, the foam stabilizer is preferably a hyperbranched modified alkyl alcohol amide. In a preferred embodiment, the hyperbranched modified alkyl alcohol amide is prepared according to the following method: cyclic fatty acids, alkanolamines and multifunctional branched monomers are subjected to melt polymerization in the presence of a catalyst, and after the reaction is completed, the obtained polymerization product is filtered, washed with water and dried to obtain a hyperbranched modified alkyl alcohol amide. Wherein, the molar ratio of the cyclic fatty acids, alkanolamines, multifunctional branched monomers and catalyst is preferably 1: (1-3): (0.8-1): (0.5-0.8). Based on the amount of cyclic fatty acid as 1 mol, the amount of alkanolamine is preferably 1 to 3 mol, such as 1 mol, 1.5 mol, 2 mol, 2.5 mol, 3 mol or any value therebetween; the amount of multifunctional branched monomer is preferably 0.8 to 1 mol, such as 0.8 mol, 0.82 mol, 0.85 mol, 0.88 mol, 0.9 mol, 0.92 mol, 0.95 mol, 0.98 mol, 1 mol or any value therebetween; the amount of catalyst is preferably 0.5 to 0.8 mol, such as 0.5 mol, 0.55 mol, 0.6 mol, 0.65 mol, 0.7 mol, 0.75 mol, 0.8 mol or any value therebetween. The cyclic fatty acid is preferably at least one of cyclohexyl carboxylic acid, cyclopentane carboxylic acid and cycloheptane carboxylic acid. Among them, the cyclohexyl carboxylic acid can be listed as at least one of cyclohexyl carboxylic acid, cyclohexyl acetic acid, cyclohexyl propionic acid, etc. The cyclopentanecarboxylic acid may be exemplified by at least one of cyclopentanecarboxylic acid, cyclopentaneacetic acid, cyclopentanepropionic acid, etc. The cycloheptanecarboxylic acid may be exemplified by at least one of cycloheptanecarboxylic acid, cycloheptaneacetic acid, cycloheptanepropionic acid, etc. The alkanolamine is preferably diethanolamine and / or triethanolamine. The multifunctional branched monomer is preferably at least one of chitosan, pentaerythritol and sorbitol. The catalyst is preferably dipotassium hydrogen phosphate and / or trifluoromethanesulfonic acid. In addition, the conditions of the melt polymerization reaction preferably include a temperature of 160°C to 180°C, such as 160°C, 162°C, 165°C, 168°C, 170°C, 172°C, 175°C, 178°C, 180°C or any value therebetween; a time of 6h to 8h, such as 6h, 6.2h, 6.5h, 6.8h, 7h, 7.2h, 7.5h, 7.8h, 8h or any value therebetween.

[0019] The preparation method of the concrete foaming agent provided by the present invention comprises uniformly mixing a foaming component, a reinforcing agent, a regulator, water and an optional foam stabilizer. The mixing method preferably comprises slowly stirring the foaming component, the reinforcing agent, the regulator and water at 50 to 180 r / min for 2 to 10 minutes, and then optionally adding a foam stabilizer and continuing stirring for 2 to 10 minutes to obtain the concrete foaming agent.

[0020] In addition, the invention also provides application of the concrete foaming agent in the field of construction.

[0021] The present invention will be described in detail below through examples.

[0022] In the following examples and comparative examples, the foam-stabilizing polycarboxylic acid water reducer was purchased from Kezhijie New Materials Group Co., Ltd., with a number average molecular weight of 30,000 and a water reducer rate of 30%; the water-soluble polyurethane was purchased from Anhui Yuanchen New Materials Technology Co., Ltd. with a brand name of YC-305.

[0023] Preparation Example 1-1 Preparation of organic amine modified sulfonated alkyl glycoside

[0024] 1 mol of octyl glucoside was mixed with 0.8 mol of ethylenediamine and reacted at 50°C for 5 hours. Then, 1.2 mol of vanadium oxide and 1.05 mol of aminosulfonic acid were added to the reaction product and reacted at 40°C for 2 hours. The crude product was then filtered, washed with water and dried to obtain an organic amine-modified sulfonated alkyl glycoside, which was recorded as A-1.

[0025] Preparation Example 1-2 Preparation of organic amine modified sulfonated alkyl glycoside

[0026] 1 mol of glycerol glucoside was mixed with 1.0 mol of ethylenediamine and reacted at 60°C for 4 hours. Then, 1.5 mol of boron trifluoride and 1.2 mol of sodium sulfite were added to the reaction product and reacted at 50°C for 1.5 hours. The crude product was then filtered, washed with water and dried to obtain an organic amine-modified sulfonated alkyl glycoside, which was recorded as A-2.

[0027] Preparation Example 1-3 Preparation of organic amine modified sulfonated alkyl glycoside

[0028] 1 mol of dodecyl glucoside was mixed with 1.2 mol of triethylenetetramine and reacted at 70°C for 3 hours, and then 2.0 mol of boron trifluoride and 1.5 mol of sodium sulfite were added to the reaction product, and the mixture was reacted at 60°C for 1 hour. The crude product was then filtered, washed with water and dried to obtain an organic amine-modified sulfonated alkyl glycoside, which was recorded as A-3.

[0029] Comparative Preparation Example 1-1 Preparation of Reference Organic Amine-Modified Alkyl Glucoside

[0030] The preparation of organic amine-modified alkyl polyglycoside was prepared according to the method of Preparation Example 1-1, except that the sulfonation modification step was not included, and the remaining conditions were the same as those of Preparation Example 1-1. The specific steps are as follows:

[0031] 1 mol of octyl glucoside and 0.8 mol of ethylenediamine were mixed and reacted at 50° C. for 5 hours, and then the obtained crude product was filtered, washed with water and dried to obtain an organic amine-modified alkyl glucoside, which was recorded as DA-1.

[0032] Preparation Example 2-1 Preparation of Hyperbranched Modified Alkyl Alcohol Amide

[0033] In a four-necked flask equipped with a stirrer, cyclohexanecarboxylic acid, diethanolamine, chitosan and dipotassium hydrogen phosphate were added in a molar ratio of 1:1:0.8:0.5, and melt polymerization was carried out at 160°C for 8 hours. After the reaction, the product was filtered, washed with water and vacuum dried to obtain a hyperbranched modified alkyl alcohol amide, which was recorded as B-1.

[0034] Preparation Example 2-2 Preparation of Hyperbranched Modified Alkyl Alcohol Amide

[0035] In a four-necked flask equipped with a stirrer, cyclopentaneacetic acid, triethanolamine, sorbitol and trifluoromethanesulfonic acid were added in a molar ratio of 1:2:1:0.6, and melt polymerization was carried out at 180°C for 6 hours. After the reaction, the product was filtered, washed with water and vacuum dried to obtain a hyperbranched modified alkyl alcohol amide, recorded as B-2.

[0036] Preparation Example 2-3 Preparation of Hyperbranched Modified Alkyl Alcohol Amide

[0037] In a four-necked flask equipped with a stirrer, cycloheptanecarboxylic acid, triethanolamine, pentaerythritol and dipotassium hydrogen phosphate were added in a molar ratio of 1:3:0.9:0.8, and melt polymerization was carried out at 160°C for 8 hours. After the reaction, the product was filtered, washed with water and vacuum dried to obtain a hyperbranched modified alkyl alcohol amide, which was recorded as B-3.

[0038] Example 1 Preparation of concrete foaming agent

[0039] According to the ratio, 20 parts by weight of organic amine-modified sulfonated alkyl glycoside (A-1), 1 part by weight of nano-silica with a D90 of 80 nm, 1 part by weight of sodium methyl silicate, 1 part by weight of a foam-stabilizing polycarboxylic acid water-reducing agent and 40 parts by weight of water are slowly stirred at 50 r / min for 2 minutes, 2 parts by weight of a hyperbranched modified alkyl alcohol amide (B-1) are added, and stirring is continued for 2 minutes to obtain a concrete foaming agent.

[0040] Example 2 Preparation of concrete foaming agent

[0041] According to the proportion, 30 parts of organic amine modified sulfonated alkyl glycoside (A-2), 2 parts by weight of nano calcium carbonate with a D90 of 110 nm, 1.5 parts by weight of water-soluble polyurethane, 1 part by weight of foam-stabilizing polycarboxylic acid water-reducing agent and 60 parts by weight of water are slowly stirred at 100 r / min for 8 minutes, 6 parts by weight of hyperbranched modified alkyl alcohol amide (B-2) are added, and stirring is continued for 7 minutes to obtain a concrete foaming agent.

[0042] Example 3 Preparation of concrete foaming agent

[0043] According to the ratio, 40 parts of organic amine modified sulfonated alkyl glycoside (A-3), 5 parts by weight of nano titanium dioxide with a D90 of 90 nm, 0.5 parts by weight of water-soluble polyurethane, 1 part by weight of foam-stabilizing polycarboxylic acid water-reducing agent and 70 parts by weight of water are slowly stirred at 180 r / min for 5 minutes, 10 parts by weight of hyperbranched modified alkyl alcohol amide (B-3) are added, and stirring is continued for 5 minutes to obtain a concrete foaming agent.

[0044] Example 4 Preparation of concrete foaming agent

[0045] A concrete foaming agent was prepared according to the method of Example 1, except that no hyperbranched modified alkyl alcohol amide (B-1) was added. The other conditions were the same as those of Example 1 to obtain a concrete foaming agent.

[0046] Example 5 Preparation of concrete foaming agent

[0047] A concrete foaming agent was prepared according to the method of Example 1, except that sodium methyl silicate was replaced by a foam-stabilizing polycarboxylate water-reducing agent of the same weight portion, and the other conditions were the same as those of Example 1 to obtain a concrete foaming agent.

[0048] Example 6 Preparation of concrete foaming agent

[0049] A concrete foaming agent was prepared according to the method of Example 1, except that the foam-stabilizing polycarboxylate water-reducing agent was replaced by the same weight portion of sodium methyl silicate, and the other conditions were the same as those of Example 1 to obtain a concrete foaming agent.

[0050] Comparative Example 1

[0051] The commercially available concrete foaming agent was purchased from Sasol (China) Chemical Co., Ltd. with the brand number 6104.

[0052] Comparative Example 2

[0053] A concrete foaming agent was prepared according to the method of Example 1, except that the organic amine-modified sulfonated alkyl glycoside (A-1) was replaced by the reference organic amine-modified alkyl glycoside (DA-1) obtained in Comparative Preparation Example 1-1 in the same weight portion, and the other conditions were the same as in Example 1 to obtain a concrete foaming agent.

[0054] Test Case

[0055] The performance of the concrete foaming agent was tested according to the method in JCT 2199-2013 ≤Foaming agent for foamed concrete≥. The dilution ratio when testing the foaming ratio was 30 times, and the foaming temperatures were 20℃±3℃ and 40℃±1℃ respectively. The temperature when testing the settlement distance and water seepage rate was controlled at 20℃±3℃ and 40℃±1℃. The results are shown in Table 1.

[0056] Table 1

[0057]

[0058] As can be seen from the results of Table 1, the concrete foaming agent provided by the present invention has a higher foaming multiple at 20°C and 40°C, and the 1h settlement distance and water bleeding rate are both low, which shows that it not only has good foaming and foam stabilizing performance at a lower temperature (20°C), but also still has good foaming and foam stabilizing performance under a higher temperature (40°C). In addition, it can be seen from the comparison of Example 1 with Example 4 that when the concrete foaming agent does not contain hyperbranched modified alkyl alcohol amide as a foam stabilizer, the foaming multiple is reduced, and the settlement distance and water bleeding rate are increased, which shows that the hyperbranched modified alkyl alcohol amide can give the concrete foaming agent better foaming and foam stabilizing performance. It can be seen from the comparison of Example 1 with Examples 5-6 that when the regulator contains both a waterproofing agent and a water reducing agent, the strength and durability of the foam can be further improved, so that the foaming and foam stabilizing performance of the concrete foaming agent is better.

[0059] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A concrete foaming agent, characterized in that: The concrete foaming agent contains a foaming component, a reinforcing agent, a regulator, water and an optional foam stabilizer; the foaming component is an organic amine-modified sulfonated alkyl glycoside; the organic amine-modified sulfonated alkyl glycoside is prepared according to the following method: polyether alkyl glycoside is subjected to hydroxylation reaction with an organic amine, the obtained hydroxylation reaction product is subjected to sulfonation reaction with a sulfonating agent, and then the obtained crude product is filtered, washed and dried to obtain the organic amine-modified sulfonated alkyl glycoside.

2. The concrete foaming agent according to claim 1, characterized in that The content of the foaming component is 20 to 40 parts by weight, the content of the enhancer is 1 to 5 parts by weight, the content of the regulator is 1 to 10 parts by weight, the content of water is 40 to 70 parts by weight, and the content of the foam stabilizer is 2 to 10 parts by weight.

3. The concrete foaming agent according to claim 1, characterized in that The molar ratio of the polyether alkyl polyglycoside to the organic amine is 1:(0.8-1.2); Preferably, the polyether alkyl glucoside is selected from at least one of octyl glucoside, glyceryl glucoside and dodecyl glucoside; Preferably, the organic amine is ethylenediamine and / or triethylenetetramine; Preferably, the molar ratio of the sulfonating agent to the polyether alkyl glycoside is 1:(1.05-1.5); Preferably, the sulfonating agent is aminosulfonic acid and / or sodium sulfite; Preferably, the conditions of the hydroxylation reaction include a temperature of 50°C to 70°C and a time of 3h to 5h; Preferably, the conditions of the sulfonation reaction include a temperature of 40°C to 60°C and a time of 1h to 2h; Preferably, the sulfonation reaction is carried out in the presence of a catalyst, and the catalyst is vanadium oxide and / or boron trifluoride.

4. The concrete foaming agent according to claim 1, characterized in that The reinforcing agent is selected from at least one of nano silicon dioxide, nano carbonate and nano titanium dioxide.

5. The concrete foaming agent according to claim 1, characterized in that The conditioning agent is a waterproofing agent and / or a water reducing agent; Preferably, the waterproofing agent is sodium methyl silicate and / or water-soluble polyurethane; Preferably, the water reducer is a foam-stabilizing polycarboxylate water reducer; Preferably, the number average molecular weight of the foam-stabilizing polycarboxylate water-reducing agent is 30,000 to 50,000; Preferably, the foam-stabilizing polycarboxylate water-reducing agent is prepared by free radical polymerization of a polyether monomer, a functional monomer and an unsaturated acid; Preferably, the polyether monomer is prenol polyoxyethylene ether and / or ethylene glycol monovinyl polyethylene glycol ether; Preferably, the functional monomer is a C1-C5 fluorinated hydrocarbon compound and / or a phosphate compound; Preferably, the unsaturated acid is acrylic acid and / or methacrylic acid.

6. The concrete foaming agent according to any one of claims 1 to 5, characterized in that: The foam stabilizer is a hyperbranched modified alkyl alcohol amide.

7. The concrete foaming agent according to claim 6, characterized in that The hyperbranched modified alkyl alcohol amide is prepared according to the following method: a cyclic fatty acid, an alkanolamine and a multifunctional branched monomer are subjected to a melt polymerization reaction in the presence of a catalyst, and after the reaction is completed, the obtained polymerization product is filtered, washed with water and dried to obtain the hyperbranched modified alkyl alcohol amide; Preferably, the molar ratio of the cyclic fatty acid, alkanolamine, multifunctional branched monomer and catalyst is 1:(1-3):(0.8-1):(0.5-0.8); Preferably, the cyclic fatty acid is selected from at least one of cyclohexylcarboxylic acid, cyclopentanecarboxylic acid and cycloheptanecarboxylic acid; Preferably, the alkanolamine is diethanolamine and / or triethanolamine; Preferably, the multifunctional branched monomer is selected from at least one of chitosan, pentaerythritol and sorbitol; Preferably, the catalyst is dipotassium hydrogen phosphate and / or trifluoromethanesulfonic acid; Preferably, the conditions of the melt polymerization reaction include a temperature of 160° C. to 180° C. and a time of 6 h to 8 h.

8. The method for preparing the concrete foaming agent according to any one of claims 1 to 7, characterized in that: The method comprises uniformly mixing a foaming component, a reinforcing agent, a regulating agent, water and an optional foam stabilizer.

9. The method for preparing a concrete foaming agent according to claim 8, characterized in that: The mixing method comprises slowly stirring the foaming component, the reinforcing agent, the regulating agent and water at 50 to 180 r / min for 2 to 10 minutes, and then optionally adding a foam stabilizer and continuing stirring for 2 to 10 minutes to obtain the concrete foaming agent.

10. Use of the concrete foaming agent according to any one of claims 1 to 7 in the field of construction.

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