A concrete foaming agent, its preparation method and application

Abstract

The application belongs to the field of concrete admixtures, and relates to a concrete foaming agent and a preparation method and application thereof. The concrete foaming agent contains a foaming component, a reinforcing agent, a regulator, water and an optional foam stabilizer, and the foaming component is organic amine modified sulfonated alkyl polyglycoside. The organic amine modified sulfonated alkyl polyglycoside is prepared by the following method: polyether alkyl polyglycoside is subjected to a hydroxylamine reaction with organic amine, and then the obtained hydroxylamine reaction product is subjected to a sulfonation reaction, and then the obtained crude product is filtered, washed and dried to obtain the organic amine modified sulfonated alkyl polyglycoside. The key of the application is to introduce the organic amine modified sulfonated alkyl polyglycoside as the foaming component into the concrete foaming agent, and the organic amine modified sulfonated alkyl polyglycoside 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 performance under high temperature conditions.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of concrete admixtures, and particularly relates to a concrete foaming agent, a preparation method and application thereof. BACKGROUND

[0002] With the global emphasis on energy saving and emission reduction and sustainable development, the demand for high-performance and environmentally friendly products in the building materials industry is increasing, and the improvement of performance has always been a research hotspot. As an important additive for improving the performance of concrete, the concrete foaming agent can significantly change the physical and chemical properties of concrete, such as reducing the density, improving the thermal insulation performance, and enhancing the impermeability, so as to meet the demand for high-performance, environmentally friendly and energy-saving materials in modern construction. The performance of the concrete foaming agent directly affects the overall quality and application effect of the concrete product.

[0003] However, the existing concrete foaming agents on the market have single function, which is difficult to meet the use demand under complex or specific environmental conditions. For example, CN115286282A discloses a composite concrete foaming agent based on animal protein modification, which is prepared from a base component, a modified protein-based foaming agent, a foam stabilizing component, an early strength component, and water. Sodium sulfate and a modified starch-based graft copolymer are used as the early strength component, and the preparation process needs to go through condensation reflux, extraction, ultrasonic and other processes, which is relatively complex and requires specific conditions, limiting its popularization and application. CN110606687A discloses a preparation method of a composite foam concrete foaming agent, which first prepares a soy protein foaming agent solution, and then adds citric acid, a surfactant, a stabilizer and polyvinyl alcohol into the soy protein foaming agent solution to obtain the composite concrete foaming agent after dispersion. CN103553421A discloses an environmentally friendly compound concrete foaming agent and a preparation method thereof, wherein the foaming component is sodium alpha-alkenyl sulfonate, alkyl glycoside, sodium fatty acid methyl ester sulfonate, cocamidopropyl betaine, tea saponin, gum arabic, hydroxypropyl methyl cellulose, gelatin, polyanionic cellulose, polyvinyl alcohol and sodium bentonite. The composition of the foaming component is complex, and the performance is single. In addition, the above-mentioned concrete fermenting agents have good foaming performance at low temperature, but poor temperature resistance, and cannot achieve good foaming and stabilizing performance at high temperature (above 35℃). SUMMARY

[0004] The first object of the present application is to provide a concrete foaming agent with good foaming and stabilizing performance in a high temperature environment.

[0005] The second object of the present application is to provide a preparation method of the above-mentioned concrete foaming agent.

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

[0007] Specifically, the concrete foaming agent provided by the present application 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 glucoside; the organic amine modified sulfonated alkyl glucoside is prepared by the following method: subjecting a polyether alkyl glucoside to a hydroxylamine reaction with an organic amine, then subjecting the obtained hydroxylamine reaction product to a sulfonation reaction with a sulfonating agent, and then filtering, washing and drying the obtained crude product to obtain the organic amine modified sulfonated alkyl glucoside.

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

[0009] The key of the present application lies in introducing the organic amine modified sulfonated alkyl glucoside as the foaming component into the concrete foaming agent, which can enhance the temperature resistance of the concrete foaming agent, endow it with good weather resistance, and make it still have good foaming and stabilizing performance under high temperature conditions.

[0010] In a preferred embodiment, the concrete foaming agent contains a foam stabilizer, and the foam stabilizer is an ultrabranched modified alkyl alcohol amide obtained by melt polymerization reaction of a cyclic fatty acid, an alkanolamine and a multifunctional branched monomer in the presence of a catalyst, which has a specific ultrabranched structure and can play a synergistic effect with the organic amine modified sulfonated alkyl glucoside, further improving the strength and durability of the foam and endowing the concrete foaming agent with better foaming and stabilizing performance.

[0011] In a preferred embodiment, the regulating agent contains a water repellent and a water reducing agent at the same time, and the water repellent is sodium methyl silicate and / or water-soluble polyurethane, and the water reducing agent is a foam stabilizing type polycarboxylic acid water reducing agent, which can effectively reduce the surface tension of the system, form stable foam, further improve the strength and durability of the foam, and make the foaming and stabilizing performance of the concrete foaming agent better. DETAILED DESCRIPTION

[0012] The foaming agent for concrete provided by the present application contains a foaming component, a reinforcing agent, a regulating agent, water and optionally a stabilizing agent. The mass ratio of the foaming component, the reinforcing agent, the regulating agent, the water and the stabilizing agent is preferably 100:(2.5-25):(2.5-50):(100-350):(0-50). The content of the reinforcing agent is preferably 2.5-25 parts by weight, such as 2.5, 3, 5, 8, 10, 12, 15, 18, 20, 22, 25 parts by weight or any value therebetween, based on 100 parts by weight of the foaming agent; the content of the regulating agent is preferably 2.5-50 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 the water is preferably 100-350 parts by weight, such as 100, 125, 150, 180, 200, 220, 250, 280, 300, 320, 350 parts by weight or any value therebetween; and the content of the stabilizing agent is preferably 0-50 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 20-40 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 reinforcing agent is 1-5 parts by weight, such as 1, 2, 3, 4, 5 parts by weight or any value therebetween; the content of the regulating agent is 1-10 parts by weight, such as 1, 2, 4, 6, 8, 10 parts by weight or any value therebetween; the content of the water is 40-70 parts by weight, such as 40, 45, 50, 55, 60, 65, 70 parts by weight or any value therebetween; and the content of the stabilizing agent is 2-10 parts by weight, such as 2, 4, 6, 8, 10 parts by weight or any value therebetween.

[0014] In the present application, the foaming component is an organic amine modified sulfonated alkyl glucoside. The organic amine modified sulfonated alkyl glucoside is prepared by the following method: hydroxyl amination reaction of polyether alkyl glucoside with organic amine, then sulfonation reaction of the obtained hydroxyl amination reaction product with sulfonating agent, and then the obtained crude product is filtered, washed and dried to obtain the organic amine modified sulfonated alkyl glucoside. The molar ratio of the polyether alkyl glucoside 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 between them. The polyether alkyl glucoside is preferably at least one selected from octyl glucoside, glycerol glucoside and dodecyl glucoside. The organic amine is preferably ethylenediamine and / or triethylenetetramine. The molar ratio of the sulfonating agent to the polyether alkyl glucoside 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 between them. The sulfonating agent is preferably sulfamic acid and / or sodium sulfite. The conditions of the hydroxyl amination reaction preferably include a temperature of 50-70°C, such as 50°C, 52°C, 55°C, 58°C, 60°C, 62°C, 65°C, 68°C, 70°C or any value between them; and a time of 3-5h, such as 3h, 3.2h, 3.4h, 3.6h, 3.8h, 4h, 4.2h, 4.4h, 4.6h, 4.8h, 5h or any value between them. The conditions of the sulfonation reaction preferably include a temperature of 40-60°C, such as 40°C, 42°C, 45°C, 48°C, 50°C, 52°C, 55°C, 58°C, 60°C or any value between them; and a time of 1-2h, such as 1h, 1.2h, 1.4h, 1.6h, 1.8h, 2h or any value between them. 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 application, the reinforcing agent is preferably at least one selected from nano-silica, nano-carbonate and nano-titanium dioxide.

[0016] In the present application, the adjusting agent can be a water repellent agent and / or a water reducing agent, preferably containing both a water repellent agent and a water reducing agent. The water repellent agent is preferably sodium methyl silicate and / or water-soluble polyurethane. The water reducing agent is preferably a foam-stable polycarboxylic acid water reducing agent. The number average molecular weight of the foam-stable polycarboxylic acid water reducing agent is preferably 30000-50000, such as 30000, 32000, 35000, 38000, 40000, 42000, 45000, 48000, 50000 or any value between them.

[0017] In an embodiment, the foam stabilizing polycarboxylate superplasticizer is prepared by a free radical polymerization reaction of a polyether monomer, a functional monomer, and an unsaturated acid. The polyether monomer is preferably isopentenyl alcohol polyoxyethylene ether and / or ethylene glycol mono-vinyl polyethylene glycol ether. The functional monomer is preferably a C1-C5 fluorohydrocarbon 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, 1-6 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, 15-30 parts by weight, such as 15, 18, 20, 22, 25, 28, 30 parts by weight, or any value therebetween. In addition, the conditions of the free radical polymerization reaction preferably include a temperature of 10-30°C, such as 10°C, 15°C, 20°C, 25°C, 30°C, or any value therebetween; and a time of 1.5-3 hours, such as 1.5 hours, 1.8 hours, 2 hours, 2.2 hours, 2.5 hours, 2.8 hours, 3 hours, or any value therebetween. In addition, the free radical polymerization reaction is performed under inert gas protection. The inert gas can be, for example, nitrogen, helium, or argon.

[0018] In the present application, the foam stabilizer is preferably a hyperbranched modified alkyl alcohol amide. In a preferred embodiment, the hyperbranched modified alkyl alcohol amide is prepared by melt polymerization of a cyclic fatty acid, an alkanolamine and a multi-functional branching monomer in the presence of a catalyst, and after the reaction is completed, the resulting polymerization product is filtered, washed with water and dried to obtain the hyperbranched modified alkyl alcohol amide. The molar ratio of the cyclic fatty acid, the alkanolamine, the multi-functional branching monomer and the catalyst is preferably 1:(1-3):(0.8-1):(0.5-0.8). The amount of the alkanolamine is preferably 1-3 mol, such as 1 mol, 1.5 mol, 2 mol, 2.5 mol, 3 mol or any value therebetween, based on 1 mol of the cyclic fatty acid; the amount of the multi-functional branching monomer is preferably 0.8-1 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; and the amount of the catalyst is preferably 0.5-0.8 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 selected from the group consisting of cyclohexyl carboxylic acid, cyclopentane carboxylic acid and cycloheptane carboxylic acid. The cyclohexyl carboxylic acid can be at least one selected from the group consisting of cyclohexyl formic acid, cyclohexyl acetic acid, cyclohexyl propionic acid and the like. The cyclopentane carboxylic acid can be at least one selected from the group consisting of cyclopentane formic acid, cyclopentane acetic acid, cyclopentane propionic acid and the like. The cycloheptane carboxylic acid can be at least one selected from the group consisting of cycloheptane formic acid, cycloheptane acetic acid, cycloheptane propionic acid and the like. The alkanolamine is preferably diethanolamine and / or triethanolamine. The multi-functional branching monomer is preferably at least one selected from the group consisting of chitosan, pentaerythritol and sorbitol. The catalyst is preferably di-potassium hydrogen phosphate and / or trifluoromethanesulfonic acid. In addition, the conditions of the melt polymerization preferably include a temperature of 160-180°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; and a time of 6-8 h, such as 6 h, 6.2 h, 6.5 h, 6.8 h, 7 h, 7.2 h, 7.5 h, 7.8 h, 8 h or any value therebetween.

[0019] The method for preparing the concrete foaming agent provided by the present application comprises mixing the foaming component, the reinforcing agent, the adjusting agent, water and optionally the foam stabilizer uniformly. The mixing method preferably comprises slowly stirring the foaming component, the reinforcing agent, the adjusting agent and water at 50-180 r / min for 2-10 min, and then optionally adding the foam stabilizer and continuing to stir for 2-10 min to obtain the concrete foaming agent.

[0020] In addition, the application further provides application of the concrete foaming agent in the field of building.

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

[0022] In the following examples and comparative examples, the foam stabilizing polycarboxylate superplasticizer is purchased from Kezhijie New Material Group Co., Ltd., the number average molecular weight is 30000, and the superplasticizer rate is 30%; the water-soluble polyurethane is purchased from Anhui Yuanchen New Material Technology Co., Ltd., and the brand is YC-305.

[0023] Preparation of organic amine modified sulfonated alkyl glucoside in preparation example 1-1

[0024] After 1 mol of octyl glucoside is mixed with 0.8 mol of ethylenediamine and reacted at 50℃ for 5h, 1.2 mol of vanadium oxide and 1.05 mol of sulfamic acid are added to the obtained reaction product, and reacted at 40℃ for 2h. Then, the obtained crude product is filtered, washed with water and dried to obtain the organic amine modified sulfonated alkyl glucoside, which is denoted as A-1.

[0025] Preparation of organic amine modified sulfonated alkyl glucoside in preparation example 1-2

[0026] After 1 mol of glycerol glucoside is mixed with 1.0 mol of ethylenediamine and reacted at 60℃ for 4h, 1.5 mol of boron trifluoride and 1.2 mol of sodium sulfite are added to the obtained reaction product, and reacted at 50℃ for 1.5h. Then, the obtained crude product is filtered, washed with water and dried to obtain the organic amine modified sulfonated alkyl glucoside, which is denoted as A-2.

[0027] Preparation of organic amine modified sulfonated alkyl glucoside in preparation example 1-3

[0028] After 1 mol of dodecyl glucoside is mixed with 1.2 mol of triethylenetetramine and reacted at 70℃ for 3h, 2.0 mol of boron trifluoride and 1.5 mol of sodium sulfite are added to the obtained reaction product, and reacted at 60℃ for 1h. Then, the obtained crude product is filtered, washed with water and dried to obtain the organic amine modified sulfonated alkyl glucoside, which is denoted as A-3.

[0029] Preparation of reference organic amine modified alkyl glucoside in comparative preparation example 1-1

[0030] The organic amine modified alkyl glucoside is prepared according to the method of preparation example 1-1, except that the sulfonation modification step is not included, and the rest of the conditions are the same as those of preparation example 1-1. The specific steps are as follows:

[0031] After 1 mol of octyl glucoside is mixed with 0.8 mol of ethylenediamine and reacted at 50℃ for 5h, the obtained crude product is filtered, washed with water and dried to obtain the organic amine modified alkyl glucoside, which is denoted as DA-1.

[0032] Preparation of hyperbranched modified alkyl alcohol amide

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

[0034] Preparation of hyperbranched modified alkyl alcohol amide

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

[0036] Preparation of hyperbranched modified alkyl alcohol amide

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

[0038] Preparation of concrete foaming agent

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

[0040] Preparation of concrete foaming agent

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

[0042] Preparation of concrete foaming agent

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

[0044] Preparation of the concrete foaming agent of Example 4

[0045] The concrete foaming agent is prepared according to the method of Example 1, except that the hyperbranched modified alkylolamide (B-1) is not added, and the other conditions are the same as those of Example 1, to obtain the concrete foaming agent.

[0046] Preparation of the concrete foaming agent of Example 5

[0047] The concrete foaming agent is prepared according to the method of Example 1, except that the sodium methylsiliconate is replaced by the same weight part of the foam stabilizing polycarboxylic acid superplasticizer, and the other conditions are the same as those of Example 1, to obtain the concrete foaming agent.

[0048] Preparation of the concrete foaming agent of Example 6

[0049] The concrete foaming agent is prepared according to the method of Example 1, except that the foam stabilizing polycarboxylic acid superplasticizer is replaced by the same weight part of the sodium methylsiliconate, and the other conditions are the same as those of Example 1, to obtain the concrete foaming agent.

[0050] Comparative Example 1

[0051] The commercially available concrete foaming agent is purchased from Sika (China) Chemical Co., Ltd., and the trade name is 6104.

[0052] Comparative Example 2

[0053] The concrete foaming agent is prepared according to the method of Example 1, except that the organic amine modified sulfonated alkyl polyglycoside (A-1) is replaced by the same weight part of the reference organic amine modified alkyl polyglycoside (DA-1) obtained from Comparative Preparation Example 1-1, and the other conditions are the same as those of Example 1, to obtain the concrete foaming agent.

[0054] Test Example

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

[0056] Table 1

[0057]

[0058] From the results of Table 1, it can be seen that the concrete foaming agent provided by the present application has a higher foaming multiple at 20℃ and 40℃, and the 1h sedimentation distance and bleeding rate are both lower, which shows that it not only has good foaming and stabilizing performance at lower temperature (20℃), but also has good foaming and stabilizing performance at higher temperature (40℃). In addition, from the comparison of Example 1 and Example 4, it can be seen that when the concrete foaming agent does not contain hyperbranched modified alkyl alcohol amide as a stabilizing agent, the foaming multiple decreases, and the sedimentation distance and bleeding rate increase, which shows that the hyperbranched modified alkyl alcohol amide can give the concrete foaming agent better foaming and stabilizing performance. From the comparison of Example 1 and Examples 5-6, it can be seen that when the adjusting agent contains both water repellent and water reducing agent at the same time, the strength and durability of the foam can be further improved, so that the foaming and stabilizing performance of the concrete foaming agent is better.

[0059] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments without departing from the principles and purposes of the present application within the scope of the present application.

Claims

1. A concrete foaming agent, characterized by, The concrete foaming agent contains a foaming component, a reinforcing agent, a regulator, and water, and optionally a foam stabilizer; the foaming component is an organic amine modified sulfonated alkyl glucoside; the organic amine modified sulfonated alkyl glucoside is prepared by the following method: hydroxyl amination reaction of polyether alkyl glucoside with organic amine, then sulfonation reaction of the obtained hydroxyl amination reaction product with a sulfonating agent, and then filtration, washing, and drying of the obtained crude product to obtain the organic amine modified sulfonated alkyl glucoside.

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

3. The concrete foaming agent of claim 1, wherein The molar ratio of the polyether alkyl glucoside to the organic amine is 1:(0.8-1.2).

4. The concrete foaming agent of claim 1, wherein The polyether alkyl glucoside is at least one selected from octyl glucoside, glycerol glucoside, and dodecyl glucoside.

5. The concrete foaming agent of claim 1, wherein The organic amine is ethylenediamine and / or triethylenetetramine.

6. The concrete foaming agent of claim 1, wherein The molar ratio of the sulfonating agent to the polyether alkyl glucoside is 1:(1.05-1.5).

7. The concrete foaming agent of claim 1, wherein The sulfonating agent is aminosulfonic acid and / or sodium sulfite.

8. The concrete foaming agent of claim 1, wherein The conditions of the hydroxyl amination reaction include a temperature of 50-70°C and a time of 3-5 hours.

9. The concrete foaming agent of claim 1, wherein The conditions of the sulfonation reaction include a temperature of 40-60°C and a time of 1-2 hours.

10. The concrete foaming agent of claim 1, wherein The sulfonation reaction is carried out in the presence of a catalyst, and the catalyst is vanadium oxide and / or boron trifluoride.

11. The concrete foaming agent of claim 1, wherein The reinforcing agent is at least one selected from nano-silicon dioxide, nano-carbonate, and nano-titanium dioxide.

12. The concrete foaming agent of claim 1, wherein The regulator is a water repellent and / or a water reducing agent.

13. The concrete foaming agent of claim 12, wherein The water repellent is sodium methyl silicate and / or a water-soluble polyurethane.

14. The concrete foaming agent of claim 12, wherein The water reducing agent is a foam stabilizing polycarboxylic acid reducing agent.

15. The concrete foaming agent of claim 14, wherein The number average molecular weight of the foam stabilizing polycarboxylic acid reducing agent is 30,000-50,000.

16. The concrete foaming agent of claim 14, wherein The foam stabilizing polycarboxylic acid reducing agent is prepared by free radical polymerization of a polyether monomer, a functional monomer, and an unsaturated acid.

17. The concrete foaming agent of claim 16, wherein The polyether monomer is isopentenyl alcohol polyoxyethylene ether and / or ethylene glycol monovinyl polyethylene glycol ether.

18. The concrete foaming agent of claim 16, wherein The functional monomer is a C1-C5 fluorohydrocarbon compound and / or a phosphate compound.

19. The concrete foaming agent according to any one of claims 1 to 18, wherein The foam stabilizer is a hyperbranched modified alkyl alcohol amide.

20. The concrete foaming agent of claim 19, wherein The hyperbranched modified alkyl alcohol amide is prepared by the following method: melt polymerization of a cyclic fatty acid, an alkanolamine, and a multi-functional branched monomer in the presence of a catalyst, and then filtration, water washing, and drying of the obtained polymerization product to obtain the hyperbranched modified alkyl alcohol amide.

21. The concrete foaming agent of claim 20, wherein The molar ratio of the cyclic fatty acid, the alkanolamine, the multi-functional branched monomer, and the catalyst is 1:(1-3):(0.8-1):(0.5-0.8).

22. The concrete foaming agent of claim 20, wherein The cyclic fatty acid is at least one selected from cyclohexyl carboxylic acid, cyclopentane carboxylic acid, and cycloheptane carboxylic acid.

23. The concrete foaming agent of claim 20, wherein The alkanolamine is diethanolamine and / or triethanolamine.

24. The concrete foaming agent of claim 20, wherein The multi-functional branched monomer is at least one selected from chitosan, pentaerythritol, and sorbitol.

25. The concrete foaming agent of claim 20, wherein The catalyst is dipotassium hydrogen phosphate and / or triflic acid.

26. The concrete foaming agent of claim 20, wherein The conditions of the melt polymerization include a temperature of 160-180°C and a time of 6-8 hours.

27. The method of claim 1-26, wherein the method is characterized by, The method comprises mixing the foaming component, the reinforcing agent, the adjusting agent, water and the optional foam stabilizer uniformly.

28. The method for preparing the concrete foaming agent according to claim 27, characterized in that, The mixing method comprises slowly stirring the foaming component, the reinforcing agent, the adjusting agent and water at 50-180 r / min for 2-10 min, and then optionally adding the foam stabilizer and continuing to stir for 2-10 min, to obtain the concrete foaming agent.

29. Use of the concrete foaming agent according to any one of claims 1-26 in the field of construction.

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