Concrete heat-preservation and moisture-preservation blanket and application of concrete heat-preservation and moisture-preservation blanket in concrete

Abstract

The invention discloses a concrete heat preservation and moisture preservation blanket, and belongs to the technical field of composite materials, a composite geotechnical cloth is modified through a heat preservation and moisture preservation coating, a multi-layer composite structure of flame-retardant canvas, an aluminum foil rubber and plastic plate, the modified composite geotechnical cloth and a sticky felt is adopted, and the concrete heat preservation and moisture preservation blanket is prepared and has the function of repeated use. The heat preservation and moisture preservation coating of the concrete heat preservation and moisture preservation blanket comprises polyol and diisocyanate components with the molar ratio of OH to NCO being 1: (1.0-1.5), the diisocyanate components comprise fluorine-modified diisocyanate and diisocyanate with the molar ratio of 1: (1-3), the polyol comprises polyethylene glycol, silica-modified diethanol amine and N, N-dimethylformamide with the molar ratio of (3-5): (2-4): 1: 1, and the diisocyanate components comprise fluorine-modified diisocyanate and diisocyanate with the molar ratio of 1: (3-5): (2-4): 1: 1. The invention relates to an N, N-bis (2-ethoxyl)-2-aminoethanesulfonic acid and benzobis (thiadiazole) hexylthiophene hydroxyl compound.

Description

Technical Field

[0001] The invention belongs to the technical field of composite materials, and particularly relates to a concrete thermal insulation and moisture retention blanket and application thereof in concrete. Background Art

[0002] After the concrete pouring process is complete, a hydration reaction initiates within the concrete, causing the internal temperature to rise rapidly, reaching a peak before gradually falling back. When the temperature difference between the interior and exterior of the concrete is too large, temperature cracks can appear on the surface of the structure. Excessive dryness on the concrete surface is also prone to cracking. Therefore, maintaining thermal insulation and moisture retention on the concrete surface is a key measure to prevent cracking.

[0003] However, in traditional maintenance methods, thermal insulation maintenance and moisture retention maintenance of concrete structures are two independent systems, which are implemented independently and difficult to take into account at the same time. Specifically, moisture retention maintenance usually involves directly sprinkling water on the surface of the concrete structure; while thermal insulation maintenance involves covering the surface of the concrete structure with insulation materials. Once the surface of the concrete structure is covered with insulation materials, it will cause inconvenience to the subsequent watering and moisture retention maintenance; conversely, if the surface of the concrete structure is to be watered and moisture retained, its surface needs to be exposed, but this is not conducive to the operation of covering it with insulation materials for thermal insulation maintenance. It can be seen that there are irreconcilable contradictions in the actual application of traditional thermal insulation maintenance and moisture retention maintenance measures, making it difficult to achieve synchronous maintenance. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a concrete thermal insulation and moisture-retaining blanket, which adopts a multi-layer composite structure. By optimizing the combination design of flame-retardant canvas, aluminum foil rubber-plastic board, modified composite geotextile and viscose felt, the composite geotextile is modified with a thermal insulation and moisture-retaining coating, thereby achieving improved performance of the concrete thermal insulation and moisture-retaining blanket and having the function of repeated use.

[0005] The technical solutions for achieving the purpose of the present invention are as follows:

[0006] A concrete thermal insulation and moisture-retaining blanket, which is a multi-layer composite structure, including flame-retardant canvas, aluminum foil rubber-plastic board, modified composite geotextile and felt; the modified composite geotextile includes composite geotextile and thermal insulation and moisture-retaining coating coated on the surface of the composite geotextile; the thermal insulation and moisture-retaining coating includes a polyol and a diisocyanate component with a molar ratio of OH to NCO groups of 1: (1.0-1.5), and the diisocyanate component includes a fluorocarbon with a molar ratio of 1: (1-3). Modified diisocyanate and diisocyanate, the polyol includes polyethylene glycol, silicone-modified diethanolamine, N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate and benzobisthiadiazole hexylthiophene hydroxyl compound in a molar ratio of (3-5): (2-4): 1:1; the general structural formula of the fluorine-modified diisocyanate is shown in Formulas 1 to 4, the structural formula of the silicone-modified diethanolamine is shown in Formula 5, and the structure of the benzobisthiadiazole hexylthiophene hydroxyl compound is shown in Formula 6:

[0007]

[0008] Specifically, the fluorine-modified diisocyanate is obtained by reacting diisocyanate with fluorine-containing diethylenetriamine; and the silicone-modified diethanolamine is obtained by reacting diethanolamine with an epoxy silane coupling agent.

[0009] Preferably, the thermal insulation and moisture-retaining coating is applied to the upper and lower surfaces of the composite geotextile.

[0010] Preferably, the fluorine-modified diisocyanate is prepared by the following preparation method:

[0011] Under a nitrogen atmosphere, weigh 2.5 to 3.5 eq of diisocyanate into a dry reactor and heat to 25 to 40°C. Dissolve 1.0 eq of fluorinated diethylenetriamine in DMF and add the mixture dropwise to the reactor. React under a nitrogen atmosphere for 16 to 18 hours to obtain a fluorinated diisocyanate.

[0012] Preferably, the diisocyanate in the diisocyanate and the fluorine-modified diisocyanate includes one or more of diphenylmethane diisocyanate, toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, and xylylene diisocyanate.

[0013] Preferably, the fluorinated diethylenetriamine is prepared by the following preparation method:

[0014] Under a dry nitrogen atmosphere, add amino-terminated diethylenetriamine and anhydrous dichloromethane to a round-bottom flask, place in an ice bath, slowly dropwise add fluorinated acyl chloride when the temperature drops to 0-5°C, and then add triethylamine dropwise, and control the temperature below 5°C; the molar ratio of the amino-terminated diethylenetriamine to the fluorinated acyl chloride is: (1.0-1.2): (1.1-1.3); after the dropwise addition is completed, the temperature is raised to 25-35°C and stirred for 3-4 hours. After the reaction is completed, wash with dilute hydrochloric acid and saturated sodium carbonate solution, dry, and remove the solvent by rotary evaporation to obtain a crude product; add dichloromethane and trifluoroacetic acid to the crude product, stir at room temperature, then add saturated sodium bicarbonate solution for washing, extract with ethyl acetate, dry and concentrate to obtain fluorinated diethylenetriamine.

[0015] Preferably, the drying is carried out in a vacuum oven at 40-55°C.

[0016] Preferably, the amino-terminated protected diethylenetriamine is prepared by the following preparation method:

[0017] Dry toluene, tert-butyl alcohol, potassium hydroxide, and N-Boc-imidazole are added to a round-bottom flask equipped with a dry nitrogen inlet and a magnetic stirrer. The mixture is heated at 50-70°C and stirred for 2-4 hours. Diethylenetriamine is then added dropwise in a molar ratio of N-Boc-imidazole to diethylenetriamine of 2-2.5:1. The solution is stirred at 50-70°C for 2-4 hours. After cooling, the reaction mixture is concentrated under vacuum, dissolved in dichloromethane, and washed three times with saturated sodium bicarbonate solution. The solution is dried over anhydrous sodium sulfate and then concentrated under vacuum to yield amino-terminated protected diethylenetriamine.

[0018] Preferably, the fluorine-containing acyl chloride includes one or more of ethyl hexafluoroglutaryl chloride, heptafluorobutyryl chloride, chlorodifluoroacetyl chloride, and 5H-octylfluoropentanoyl chloride.

[0019] Preferably, the silicone-modified diethanolamine is prepared by the following preparation method: under a nitrogen atmosphere, 0.8 to 1.0 eq of epoxy silane coupling agent and 1.2 to 3.0 eq of diethanolamine are added to a round-bottom flask, stirred and heated to 25 to 50° C., reacted for 2 to 4 hours, and then cooled to room temperature, and the excess diethanolamine is removed by reduced pressure distillation to obtain silicone-modified diethanolamine.

[0020] Preferably, the epoxysilane coupling agent includes one or more of γ-glycidyloxypropyltriethoxysilane, γ-glycidyloxypropyltrimethoxysilane, and β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

[0021] Preferably, the benzobisthiadiazole hexylthiophene hydroxy compound is prepared by the following preparation method:

[0022] (1) Synthesis of phenylthiophene amine intermediate: Under nitrogen atmosphere, 1 eq of 4,4'-dimethoxydiphenylamine, 1 eq of 2-bromo-4-hexylthiophene, 0.05 eq of tris(dibenzylideneacetone)dipalladium, 0.4 eq of tri-tert-butylphosphine (10% by mass solution in toluene), 1.3 eq of sodium tert-butoxide and toluene were mixed, stirred and heated under reflux for 24 h. After the reaction was completed, the mixture was cooled to room temperature, washed with water, and the organic phase was extracted and dried. The organic phase was purified by silica gel column chromatography to obtain the phenylthiophene amine intermediate, the structural formula of which is shown below:

[0023]

[0024] (2) Synthesis of tributyltin phenylthiophene amine intermediate: n-Butyl lithium was added dropwise to a tetrahydrofuran solution of MPA-TC6 at -78°C and stirred for 1 hour; tributyltin chloride was then added and stirred at room temperature for 12 hours. After the reaction was completed, a saturated potassium fluoride solution was added to quench the reaction; the mixture was extracted three times with hexane, the organic phases were combined and dried over solid sodium sulfate, and the solvent was removed under reduced pressure to obtain a tributyltin phenylthiophene amine intermediate, the structural formula of which is shown below:

[0025]

[0026] (3) Synthesis of benzobisthiadiazole hexylthiophene hydroxyl compound: Under nitrogen atmosphere, 1 eq of tributyltin phenylthiopheneamine intermediate, 0.5 eq of 4,7-dibromobenzo[1,2-c:4,5-c']bis([1,2,5]thiadiazole), 0.05 eq of tris(dibenzylideneacetone)dipalladium, 0.4 eq of tri(o-tolyl)phosphine and degassed ultra-dry toluene were mixed and reacted at 110°C for 10 to 12 hours. After the reaction, the mixture was cooled to room temperature, quenched with saturated potassium fluoride solution, extracted with dichloromethane, the organic phases were combined and dried with solid sodium sulfate, the solvent was removed under reduced pressure, and purified on a silica gel column to obtain benzobisthiadiazole hexylthiophene hydroxyl compound. Bis-thiadiazole hexylthiophene methyl ether compound; 1eq of benzobis-thiadiazole hexylthiophene methyl ether compound was mixed with anhydrous dichloromethane, and 15eq of a 20% by mass boron tribromide dichloromethane solution was added dropwise at a rate of 1 to 2 drops per second in an ice bath, maintaining the temperature below 5°C. After the addition was complete, the ice bath was removed and the mixture was stirred at room temperature for 3 to 4 hours. After the reaction was completed, methanol was added dropwise to quench the reaction, stirred for 10 to 15 minutes, and then extracted with a saturated sodium bicarbonate solution and a dichloromethane solution. The organic phases were combined, dried over a saturated sodium sulfate solid, and then subjected to silica gel column chromatography to obtain the product benzobis-thiadiazole hexylthiophene hydroxy compound, the structural formula of which is shown below:

[0027]

[0028] Preferably, the thermal insulation and moisture-retaining coating further includes a catalyst and an auxiliary agent; the amount of the catalyst added is 0.5 to 2 mol% of the total amount of the polyol and diisocyanate components added, and the amount of the auxiliary agent added is 0 to 30 mol% of the total amount of the polyol and diisocyanate components added.

[0029] Preferably, the catalyst comprises one or more of dibutyltin dilaurate, stannous octoate, dimethyltin diceneodecanoate and bismorpholinodivinyl ether.

[0030] Preferably, the auxiliary agent includes one or more of an inorganic filler, a plasticizer and a curing agent; the inorganic filler includes one or more of talc, calcite, dolomite, kaolin and quartz powder; the plasticizer includes one or more of chlorinated paraffin and diisononyl phthalate.

[0031] Preferably, the flame retardant canvas is one or more of aramid flame retardant canvas, flame retardant PVC coated glass fiber canvas, halogen-free flame retardant polyester canvas, and silicone coated flame retardant canvas.

[0032] Preferably, the method for preparing the thermal insulation and moisture-retaining coating comprises the following steps:

[0033] (4) mixing polyethylene glycol, silicone-modified diethanolamine, N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate, benzobisthiadiazole hexylthiophene hydroxy compound and an auxiliary agent, stirring and heating to 110-120° C., and dehydrating under vacuum conditions for 1-2 hours;

[0034] (5) Under nitrogen atmosphere, cool the system of step (1) to 60-70°C, add half of the fluorine-modified diisocyanate, half of the diisocyanate and half of the catalyst, stir and heat to 75-85°C, and react for 2-3 hours;

[0035] (6) Add the remaining fluorine-modified diisocyanate, diisocyanate and catalyst to the system of step (2), continue stirring for 2 to 3 hours, and naturally cool to room temperature after the reaction is completed. Discharge the material to obtain a thermal insulation and moisture-retaining coating.

[0036] Another object of the present invention is to provide a method for preparing a concrete thermal insulation and moisture-retaining blanket, comprising the following steps:

[0037] (a) using a soft brush to remove dust, oil and particulate matter from the surface of the composite geotextile and setting aside; applying the thermal insulation and moisture-retaining coating to the upper and lower surfaces of the surface-treated composite geotextile by spraying or scraping, and drying and curing with air at 50-60° C. to obtain a modified composite geotextile;

[0038] (b) From the outside to the inside, flame-retardant canvas, aluminum foil rubber-plastic board, composite geotextile and adhesive felt are bonded in sequence, and then cut and sewn to obtain a concrete thermal insulation and moisture-retaining blanket.

[0039] Preferably, the thickness of the thermal insulation and moisture-retaining coating in step (a) is 50 to 100 μm; and the bonding in step (b) is performed using an adhesive, which is one or more of polyurethane adhesive, acrylic adhesive, and EVA hot melt adhesive.

[0040] Another object of the present invention is to protect the application of a concrete thermal insulation and moisture-retaining blanket in concrete. The application method of the concrete thermal insulation and moisture-retaining blanket in concrete is as follows:

[0041] S1. Pre-attach the hook surface of the Velcro to the loop surface of the Velcro on the concrete insulation blanket. Each Velcro strip on the concrete insulation blanket must be tightly attached.

[0042] S2. After the main structure formwork is removed, immediately apply concrete insulation blankets to the water-facing wall, laying them flat and evenly across the entire surface. Adjacent concrete insulation blankets must overlap properly, leaving no gaps.

[0043] S3. After the concrete insulation blanket is firmly attached, sprinkle water into the gap between the concrete insulation blanket and the wall at the top edge. After sprinkling water, check whether the wall and the concrete insulation blanket are completely wet.

[0044] S4. Daily inspections are required during the curing process. If the concrete insulation blanket falls off and the wall surface becomes dry, the fallen concrete insulation blanket should be reattached and the dry wall surface should be hydrated and maintained in a timely manner.

[0045] S5. After the curing period, the concrete thermal insulation blanket shall be removed and recycled in a unified manner to avoid environmental pollution.

[0046] Beneficial effects

[0047] The present invention has the following beneficial effects:

[0048] The present invention provides a concrete thermal insulation and moisture-retaining blanket, which adopts a multi-layer composite structure. By optimizing the combined design of flame-retardant canvas, aluminum foil rubber-plastic board, modified composite geotextile and sticky felt, and modifying the composite geotextile with a thermal insulation and moisture-retaining coating, the performance of the concrete thermal insulation and moisture-retaining blanket is improved and the blanket has the function of repeated use.

[0049] The present invention introduces siloxane groups into the polyurethane through chemical modification, resulting in high chemical stability and weather resistance, resistance to erosion by environmental factors such as ultraviolet rays, oxygen, and moisture, enhanced flexibility, elasticity, and crosslinking density, and improved hydrophobicity. The introduction of fluorine groups can significantly reduce the surface energy of the coating, significantly improving its hydrophobicity and water resistance, thermal insulation, chemical resistance, weather resistance, and aging resistance. The introduction of sulfonic acid groups can enhance compatibility with the substrate, reduce the risk of interfacial delamination, improve the long-term integrity of the waterproof layer, and enhance crack resistance and durability. The effective combination of these groups results in the polyurethane having an appropriate viscosity, improved adhesion, and improved weather resistance.

[0050] The introduction of benzothiadiazole has the following effects: 1. Enhance the thermal stability and durability of the coating: its conjugated planar structure gives it high thermal stability, which can withstand the heat generated during the hydration process of concrete and delay the aging of the coating. Its conjugated π electron system can absorb ultraviolet rays, reduce the polymer chain breakage caused by sunlight exposure, and extend the service life of the coating; 2. Improve thermal insulation performance: From the molecular structure analysis, benzothiadiazole forms a surrounding insulation layer through π-π stacking and van der Waals force, reducing the heat conduction path, reducing heat loss, and enhancing thermal insulation performance; 3. Antibacterial and anti-mildew effect: The sulfur and nitrogen heterocyclic structures of benzothiadiazole have an inhibitory effect on microorganisms, which helps to reduce the biodegradation of the coating and extend the maintenance cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 Schematic diagram of the synthesis and structure of fluorinated diethylenetriamine.

[0052] Figure 2 Schematic diagram of the synthesis and structure of fluorine-modified diisocyanate.

[0053] Figure 3 Schematic diagram of the synthesis and structure of silicon-modified diethanolamine.

[0054] Figure 4 The diagram shows the synthesis and structure of benzobisthiadiazole hexylthiophene hydroxyl compound.

[0055] Figure 5 This is the H NMR spectrum of fluorine-modified diisocyanate 1.

[0056] Figure 6 This is the H NMR spectrum of benzobisthiadiazole hexylthiophene hydroxy compound 1. DETAILED DESCRIPTION

[0057] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0058] In the examples, the experimental methods used are conventional methods unless otherwise specified, and the materials, reagents, etc. used are all commercially available unless otherwise specified.

[0059] The raw materials and equipment used in the embodiments and comparative examples are described below:

[0060] Fluorine-modified diisocyanate 1: Homemade, the preparation method is as follows:

[0061] S1: Synthesis of amino-terminated protected diethylenetriamine: 150 mL of dry toluene, 1.0 eq of tert-butyl alcohol, 0.025 eq of potassium hydroxide, and 1 eq of N-Boc-imidazole were added to a 250 mL round-bottom flask equipped with a dry nitrogen inlet and a magnetic stirrer, heated at 60°C and stirred for 3 h. 0.5 eq of diethylenetriamine was then added dropwise. The solution was stirred at 60°C for another 3 h. The reaction mixture was cooled and concentrated under vacuum, then dissolved in 100 mL of dichloromethane and washed three times with 50 mL of saturated sodium bicarbonate solution. The solution was dried over anhydrous sodium sulfate and then concentrated under vacuum to obtain amino-terminated protected diethylenetriamine.

[0062] S2: Synthesis of fluorinated diethylenetriamine: In a dry nitrogen atmosphere, diethylenetriamine with protected terminal amino groups and anhydrous dichloromethane were mixed, placed in an ice bath, and when the temperature dropped to 0°C, ethylhexafluoroglutaryl chloride was slowly added dropwise, followed by triethylamine, with the temperature controlled below 5°C. After the addition was complete, the temperature was raised to 25°C and stirred for 3-4 hours. After the reaction was completed, the product was washed with 1 mol / L dilute hydrochloric acid and saturated sodium carbonate solution, dried, and the solvent was removed by rotary evaporation to obtain a crude product. The crude product was added with dichloromethane and trifluoroacetic acid, stirred at room temperature for 2-3 hours, washed with saturated sodium bicarbonate solution, extracted with ethyl acetate, and dried and concentrated to obtain fluorinated diethylenetriamine. The reaction route is as follows: Figure 1 shown.

[0063] S3: Synthesis of fluorine-modified diisocyanate 1: Under nitrogen atmosphere, 2.5 eq of diphenylmethane diisocyanate was weighed into a dry reactor and heated to 25°C. 1.0 eq of fluorinated diethylenetriamine was dissolved in DMF and added dropwise to the reactor. The reaction was carried out under nitrogen atmosphere for 16 h to obtain fluorine-modified diisocyanate 1. The structural formula is as follows, and the reaction route is as follows: Figure 2 As shown:

[0064] Its nuclear magnetic resonance hydrogen spectrum is as follows Figure 5 shown.

[0065] Fluorine-modified diisocyanate 2: Homemade. Compared with the preparation method of fluorine-modified diisocyanate 1, the difference is that the ethyl hexafluoroglutaryl chloride added in step S2 is replaced with heptafluorobutyryl chloride. Other conditions remain unchanged to obtain fluorine-modified diisocyanate 2, the structural formula of which is shown below:

[0066]

[0067] Modified diisocyanate 3: Homemade. Compared with the preparation method of fluorine-modified diisocyanate 1, the difference is that the ethyl hexafluoroglutaryl chloride added in step S2 is replaced with ethyl glutaric acid monoethyl chloride. Other conditions remain unchanged to obtain modified diisocyanate 3, the structural formula of which is shown below:

[0068]

[0069] Silicone-modified diethanolamine: homemade, the preparation method is as follows:

[0070] Under nitrogen atmosphere, 1.0 eq epoxy silane coupling agent and 2.0 eq diethanolamine were added to a 250 mL round-bottom flask, stirred and heated to 40 ° C, reacted for 2 to 4 hours, cooled to room temperature, and the excess diethanolamine was removed by vacuum distillation to obtain silicon-modified diethanolamine. The structural formula is shown below, and the reaction route is as follows: Figure 3 As shown:

[0071]

[0072] Benzobisthiadiazole hexylthiophene hydroxy compound 1: homemade, the preparation method is as follows:

[0073] (1) Synthesis of phenylthiophene amine intermediate: Under nitrogen atmosphere, 1 eq of 4,4'-dimethoxydiphenylamine, 1 eq of 2-bromo-4-hexylthiophene, 0.05 eq of tris(dibenzylideneacetone)dipalladium, 0.4 eq of tri-tert-butylphosphine (10% by mass solution in toluene), 1.3 eq of sodium tert-butoxide and toluene were mixed, stirred and heated under reflux for 24 h. After the reaction was completed, the mixture was cooled to room temperature, washed with water, and the organic phase was extracted and dried. The organic phase was purified by silica gel column chromatography to obtain the phenylthiophene amine intermediate, the structural formula of which is shown below:

[0074]

[0075] (2) Synthesis of tributyltin phenylthiophene amine intermediate: n-Butyl lithium was added dropwise to a tetrahydrofuran solution of MPA-TC6 at -78°C and stirred for 1 hour; tributyltin chloride was then added and stirred at room temperature for 12 hours. After the reaction was completed, a saturated potassium fluoride solution was added to quench the reaction; the mixture was extracted three times with hexane, the organic phases were combined and dried over solid sodium sulfate, and the solvent was removed under reduced pressure to obtain a tributyltin phenylthiophene amine intermediate, the structural formula of which is shown below:

[0076]

[0077] (3) Synthesis of benzobisthiadiazole hexylthiophene hydroxy compound: Under nitrogen atmosphere, 1 eq of tributyltin phenylthiopheneamine intermediate, 0.5 eq of 4,7-dibromobenzo[1,2-c:4,5-c']bis([1,2,5]thiadiazole), 0.05 eq of tris(dibenzylideneacetone)dipalladium, 0.4 eq of tri(o-tolyl)phosphine and degassed ultra-dry toluene were mixed and reacted at 110°C for 12 h. After the reaction, the mixture was cooled to room temperature, quenched with saturated potassium fluoride solution, extracted with dichloromethane, the organic phases were combined and dried with solid sodium sulfate, the solvent was removed under reduced pressure, and purified on a silica gel column to obtain benzobisthiadiazole. Bis-thiadiazole hexylthiophene methyl ether compound; 1eq of benzobis-thiadiazole hexylthiophene methyl ether compound was mixed with anhydrous dichloromethane, and 15eq of a 20% by mass boron tribromide dichloromethane solution was added dropwise at a rate of 1 to 2 drops per second in an ice bath, maintaining the temperature below 5°C. After the addition was complete, the ice bath was removed and the mixture was stirred at room temperature for 3 to 4 hours. After the reaction was completed, methanol was added dropwise to quench the reaction, stirred for 15 minutes, and then extracted with a saturated sodium bicarbonate solution and a dichloromethane solution. The organic phases were combined, dried over a saturated sodium sulfate solid, and then subjected to silica gel column chromatography to obtain the product benzobis-thiadiazole hexylthiophene hydroxy compound 1, the structural formula of which is shown below:

[0078] Its nuclear magnetic resonance hydrogen spectrum is as follows Figure 6 shown.

[0079] Benzobisthiadiazole hexylthiophene hydroxy compound 2: homemade. The preparation method is compared with the benzobisthiadiazole hexylthiophene hydroxy compound 1, except that 0.5eq of 4,7-dibromobenzo[1,2-c:4,5-c']bis([1,2,5]thiadiazole) in step (3) is replaced with 1eq of 4-bromobenzo[1,2-c:4,5-c']bis([1,2,5]thiadiazole). Other conditions remain unchanged to obtain benzobisthiadiazole hexylthiophene hydroxy compound 2, the structural formula of which is shown below:

[0080]

[0081] Benzobisthiadiazole hexylthiophene hydroxy compound 3: homemade. The preparation method is similar to that of benzobisthiadiazole hexylthiophene hydroxy compound 1, except that 4,7-dibromobenzo[1,2-c:4,5-c']bis([1,2,5]thiadiazole) in step (3) is replaced with p-dibromobenzene. Other conditions remain unchanged, resulting in benzobisthiadiazole hexylthiophene hydroxy compound 3, the structural formula of which is shown below:

[0082]

[0083] Polyethylene glycol: molecular weight 1000, product number P815605, purchased from Shanghai MacLean Biochemical Technology Co., Ltd.;

[0084] N,N-Bis(2-hydroxyethyl)-2-aminoethanesulfonate: Product No. BD168684, purchased from Shanghai Bidex Pharmaceutical Technology Co., Ltd.

[0085] Diphenylmethane diisocyanate: product number M106783, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0086] γ-Glycidyloxypropyltriethoxysilane: Product No. D030166, purchased from Anhui Zesheng Technology Co., Ltd.

[0087] Ethyl hexafluoroglutaryl chloride: Product No. JX035165, purchased from Anhui Zesheng Technology Co., Ltd.

[0088] Heptafluorobutyryl chloride: product number 908221, purchased from Beijing Bailingwei Technology Co., Ltd.;

[0089] Ethyl glutarate chloride: product number 252233, purchased from Shandong Xiya Chemical Co., Ltd.

[0090] Diethanolamine: Product No. EB000089, purchased from Anhui Zesheng Technology Co., Ltd.

[0091] Catalyst: dibutyltin dilaurate, product number W6105630250, purchased from Anhui Zesheng Technology Co., Ltd.

[0092] Additives: talc powder, product number A16588, purchased from Anhui Zesheng Technology Co., Ltd.

[0093] Additives: chlorinated paraffin, purchased from Shenzhen Polymer Biochemical Technology Co., Ltd.;

[0094] Polyester woven fabric: 200d, Shaoxing Shitai Textile Co., Ltd.

[0095] Flame retardant canvas: flame retardant PVC canvas, purchased from Taixing Sanxin Canvas Factory;

[0096] Aluminum foil rubber-plastic board: thermal conductivity <0.034W / (m·K), purchased from Hebei Aomeisi Rubber-Plastic Insulation Material Co., Ltd.

[0097] Composite geotextile: purchased from Shanghai Lejing Building Materials Co., Ltd.

[0098] Viscose felt: absorbent needle-punched non-woven fabric, thickness 5mm, Weixian Runhua Felt Products Sales Co., Ltd.; 1m×1m;

[0099] 4,4'-Dimethoxydiphenylamine: Product No. 1015059, purchased from Shanghai Haohong Biopharmaceutical Technology Co., Ltd.

[0100] 2-Bromo-4-hexylthiophene: purchased from Henan Weitixi Chemical Technology Co., Ltd.

[0101] Tris(dibenzylideneacetone)dipalladium: product number BD00783506, purchased from Shanghai Bid Pharmaceutical Technology Co., Ltd.;

[0102] Tri-tert-butylphosphine: 10% toluene solution, purchased from Yurui (Shanghai) Chemical Co., Ltd.

[0103] Sodium tert-butoxide: product number 1253505, purchased from Shanghai Haohong Biopharmaceutical Technology Co., Ltd.

[0104] n-Butyl lithium: 2.5 M hexane solution, product number MR030007, purchased from Shanghai Hanhong Technology Co., Ltd.

[0105] Tributyltin chloride: product number R012652, purchased from Shanghai Yien Chemical Technology Co., Ltd.;

[0106] Potassium fluoride: Product No. P116296, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0107] 4,7-Dibromobenzo[1,2-c:4,5-c']bis([1,2,5]thiadiazole): purchased from Zhengzhou Aikemu Chemical Co., Ltd.

[0108] 4-Bromobenzo[1,2-c:4,5-c']bis([1,2,5]thiadiazole): purchased from Shanghai Bidex Pharmaceutical Technology Co., Ltd.;

[0109] p-Dibromobenzene: product number 1015863, purchased from Shanghai Haohong Biopharmaceutical Technology Co., Ltd.

[0110] Tri(o-tolyl)phosphine: purchased from Beijing Greenchem Technology Co., Ltd.

[0111] Preparation Example 1

[0112] Thermal insulation and moisturizing coating 1: The preparation method is as follows:

[0113] (1) Weigh 20 parts of polyethylene glycol, 15 parts of silicone-modified diethanolamine, 5 parts of N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate, 5 parts of benzobisthiadiazole hexylthiophene hydroxy compound 1, 15 parts of talc, and 3 parts of chlorinated paraffin, mix them, stir, heat to 115°C, and dehydrate under vacuum for 2 hours;

[0114] (2) Under nitrogen atmosphere, the system of step S1 was cooled to 60°C, 8.5 parts of fluorinated diisocyanate 1, 17 parts of diphenylmethane diisocyanate and 0.6 parts of catalyst were added, and the mixture was stirred and heated to 80°C and reacted for 3 hours;

[0115] (3) Add 8.5 parts of fluorine-modified diisocyanate 1, 17 parts of diphenylmethane diisocyanate and 0.6 parts of catalyst to the system of step S2, continue stirring for 2 to 3 hours, and naturally cool to room temperature after the reaction is completed. Discharge the material to obtain a thermal insulation and moisture-retaining coating 1.

[0116] Preparation Example 2

[0117] Thermal insulation and moisture-retaining coating 2: The preparation method is compared with the thermal insulation and moisture-retaining coating 1, except that 6.5 parts of fluorine-modified diisocyanate 1 and 19 parts of diphenylmethane diisocyanate are added in step (2) and step (3), respectively, and other conditions remain unchanged.

[0118] Preparation Example 3

[0119] Thermal insulation and moisture-retaining coating 3: The preparation method is compared with the thermal insulation and moisture-retaining coating 1, except that 12.75 parts of fluorine-modified diisocyanate 1 and 12.75 parts of diphenylmethane diisocyanate are added in step (2) and step (3), respectively, and other conditions remain unchanged.

[0120] Preparation Example 4

[0121] Thermal insulation and moisturizing coating 4: The preparation method is compared with the thermal insulation and moisturizing coating 1, except that in step (1), 25 parts of polyethylene glycol, 10 parts of silicone-modified diethanolamine, 5 parts of N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate, and 5 parts of benzobisthiadiazole hexylthiophene hydroxyl compound 1 are added, and other conditions remain unchanged.

[0122] Preparation Example 5

[0123] Thermal insulation and moisturizing coating 5: The preparation method is compared with the thermal insulation and moisturizing coating 1, except that in step (1), 15 parts of polyethylene glycol, 20 parts of silicone-modified diethanolamine, 5 parts of N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate, and 5 parts of benzobisthiadiazole hexylthiophene hydroxyl compound 1 are added, and other conditions remain unchanged.

[0124] Preparation Example 6

[0125] Thermal insulation and moisture-retaining coating 6: The preparation method is compared with the thermal insulation and moisture-retaining coating 1, except that the fluorine-modified diisocyanate 1 in step (2) and step (3) is replaced by fluorine-modified diisocyanate 2, and other conditions remain unchanged.

[0126] Preparation Example 7

[0127] Thermal insulation and moisture-retaining coating 7: The preparation method is compared with the thermal insulation and moisture-retaining coating 1, except that the benzobisthiadiazole hexylthiophene hydroxyl compound 1 in step (1) replaces the benzobisthiadiazole hexylthiophene hydroxyl compound 2, and other conditions remain unchanged.

[0128] Preparation Example 8

[0129] Thermal insulation and moisture-retaining coating 8: The preparation method is compared with the thermal insulation and moisture-retaining coating 1, except that the benzobisthiadiazole hexylthiophene hydroxyl compound 1 in step (1) replaces the benzobisthiadiazole hexylthiophene hydroxyl compound 3, and other conditions remain unchanged.

[0130] Preparation Example 9

[0131] Thermal insulation and moisture-retaining coating 9: The preparation method is compared with the thermal insulation and moisture-retaining coating 1, except that the fluorine-modified diisocyanate 1 in step (2) and step (3) is replaced by modified diisocyanate 3, and other conditions remain unchanged.

[0132] Preparation Example 10

[0133] Thermal insulation and moisture-retaining coating 10: The preparation method is compared with the thermal insulation and moisture-retaining coating 1, except that the silicone-modified diethanolamine in step (1) is replaced with diethanolamine, and the structural formula is as follows:

[0134]

[0135] All other conditions remain unchanged.

[0136] Preparation Example 11

[0137] Thermal insulation and moisture-retaining coating 11: The preparation method is compared with the thermal insulation and moisture-retaining coating 1, except that N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate is not added in step (1), the amount of polyethylene glycol added is changed to 25 parts, and other conditions remain unchanged.

[0138] Preparation Example 12

[0139] Thermal insulation and moisture-retaining coating 12: The preparation method is compared with the thermal insulation and moisture-retaining coating 1, except that in step (1), benzobisthiadiazole hexylthiophene hydroxy compound 1 is not added, the amount of polyethylene glycol added is changed to 25 parts, and other conditions remain unchanged.

[0140] Examples 1 to 8 and Comparative Examples 1 to 4

[0141] Concrete thermal insulation and moisture-retaining blankets 1 to 12, wherein concrete thermal insulation and moisture-retaining blankets 1 to 8 correspond to Examples 1 to 8, and concrete thermal insulation and moisture-retaining blankets 9 to 12 correspond to Examples 1 to 4, are prepared as follows:

[0142] (a) using a soft brush to remove dust, oil, and particulate matter from the surface of the composite geotextile and setting aside; applying the thermal insulation and moisture-retaining coatings 1 to 12 to the upper and lower surfaces of the surface-treated composite geotextile by spraying or scraping, and drying and curing with air at 60° C. to obtain modified composite geotextiles 1 to 12;

[0143] (b) From the outside to the inside, the flame-retardant canvas, the aluminum foil rubber-plastic board, the modified composite geotextile 1 to 12 and the adhesive felt are sequentially bonded, and then cut and sewn to obtain the concrete thermal insulation and moisture-retaining blanket 1 to 12.

[0144] The following are the test methods for the performance parameters involved in the present invention:

[0145] 1. Peeling force: The peeling force between the thermal insulation and moisture-retaining coating and the composite geotextile is tested according to GB / T 8808-1988 "Test method for peeling of soft composite plastic materials";

[0146] 2. Crack Detection: The same batch of concrete was cured using the concrete thermal insulation and moisture retention blankets of Examples 1 to 8 and Comparative Examples 1 to 4, respectively. Curing was carried out for 7 days in an outdoor environment with an average outdoor temperature of not less than 20°C. The number of cracks on the concrete surface and the total cracked area per unit area were calculated and the data were recorded.

[0147] 3. Temperature difference detection: The same batch of concrete was cured using the concrete thermal insulation and moisture-retaining blankets of Examples 1 to 8 and Comparative Examples 1 to 4, respectively. The concrete was cured for 24 hours in an outdoor environment with an average outdoor temperature of not less than 20°C. The temperature of the contact surface between the covering concrete thermal insulation and moisture-retaining blanket and the concrete surface was detected and recorded as the covering curing surface temperature. The recorded temperature = covering curing surface temperature - outdoor temperature. The data was recorded. The greater the temperature difference, the better the thermal insulation effect, and the smaller the temperature difference, the worse the thermal insulation effect of the covering blanket.

[0148] 4. Humidity testing: The same batch of concrete was cured using the concrete thermal insulation and moisture-retaining blankets of Examples 1 to 8 and Comparative Examples 1 to 4, respectively. Curing was carried out for 24 hours in an outdoor environment with an average outdoor temperature of not less than 20°C. The humidity of the contact surface between the concrete thermal insulation and moisture-retaining blanket and the concrete surface was tested and the data was recorded.

[0149] Table 1 Performance test data of Examples 1 to 8 and Comparative Examples 1 to 4

[0150]

[0151] In terms of peeling force, the difference between Examples 1 to 3 lies in the different ratios of fluorine-modified diisocyanate to diphenylmethane diisocyanate. As the proportion of fluorine-modified diisocyanate added increases, the peeling force increases. Comparative Example 1 uses fluorine-free modified diisocyanate 3, and the peeling force decreases. It is speculated that the fluorine-containing chain segment helps to enhance the interfacial hydrophobicity and chemical bonding strength; at the same time, compared with Example 1, the peeling force of Comparative Example 2 decreases. It is speculated that the addition of silicone-modified diethanol helps to improve the bonding strength with the substrate, thereby increasing the peeling force.

[0152] In terms of crack detection, comparative example 4 does not add benzobisthiadiazole hexylthiophene hydroxy compound 1, and its crack number and crack area are much higher than those of other comparative examples and embodiments. It is speculated that the rigid conjugated structure of the benzobisthiadiazole hexylthiophene hydroxy compound inhibits shrinkage stress and reduces the number of cracks.

[0153] In terms of temperature difference, the temperature difference of Example 6 is better than that of Example 1, while the temperature difference of Comparative Example 1 is reduced to 3.5° C. It is speculated that the fluorine-modified diisocyanate can reduce heat convection loss and increase the temperature difference.

[0154] In terms of humidity, compared with Example 1 and Comparative Example 3, it is speculated that the introduction of ether bonds and sulfonic acid groups of polyethylene glycol forms a hydrogen bond network, which improves the water-locking ability; the hydrophobic surface of the fluorine segment prevents external water intrusion, and the hydrophilic group maintains humidity stability.

[0155] In summary, the present invention prepares a thermal insulation and moisture-retaining coating through the synergistic effect of fluorine-modified diisocyanate, benzobisthiadiazole hydroxyl compound, silicone-modified diethanolamine, and sulfonic acid group, which is used in concrete thermal insulation and moisture-retaining blanket. The significant performance degradation of the control ratio further highlights the irreplaceable nature of the core components.

[0156] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A concrete thermal insulation blanket, characterized in that: The concrete thermal insulation and moisture-retaining blanket is a multi-layer composite structure, including flame-retardant canvas, aluminum foil rubber-plastic board, modified composite geotextile and viscose felt; the modified composite geotextile includes composite geotextile and thermal insulation and moisture-retaining coating applied on the surface of the composite geotextile; The heat-insulating and moisture-retaining coating comprises a polyol and a diisocyanate component in a molar ratio of OH to NCO groups of 1:(1.0-1.5), the diisocyanate component comprises a fluorine-modified diisocyanate and a diisocyanate in a molar ratio of 1:(1-3), the polyol comprises polyethylene glycol, silicone-modified diethanolamine, N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate, and a benzobisthiadiazole hexylthiophene hydroxyl compound in a molar ratio of (3-5):(2-4):1:1; the general structural formulas of the fluorine-modified diisocyanate are shown in Formulas 1 to 4, the structural formula of the silicone-modified diethanolamine is shown in Formula 5, and the structure of the benzobisthiadiazole hexylthiophene hydroxyl compound is shown in Formula 6:

2. The concrete thermal insulation and moisture retention blanket according to claim 1, characterized in that: The thermal insulation and moisture retention coating is applied to the upper and lower surfaces of the composite geotextile.

3. The concrete thermal insulation and moisture retention blanket according to claim 1, characterized in that: The preparation method of the fluorine-modified diisocyanate is as follows: Under a nitrogen atmosphere, weigh a diisocyanate into a dry reactor, heat to 25-40°C, dissolve fluorinated diethylenetriamine in DMF, add the mixture dropwise to the reactor, and react for 16-18 hours under a nitrogen atmosphere to obtain a fluorine-modified diisocyanate; the diisocyanate includes one or more of diphenylmethane diisocyanate, toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, and xylylene diisocyanate.

4. The concrete thermal insulation and moisture retention blanket according to claim 1, characterized in that: The preparation method of the fluorinated diethylenetriamine is as follows: In a dry nitrogen atmosphere, amino-terminated diethylenetriamine and anhydrous dichloromethane are mixed, ice-bathed, and when the temperature drops to 0°C, a fluorinated acyl chloride is slowly added dropwise, and triethylamine is added dropwise, with the temperature controlled below 5°C. After the addition is complete, the temperature is raised to 25°C and stirred for 3-4 hours. After the reaction is completed, the product is washed with 1 mol / L dilute hydrochloric acid and a saturated sodium carbonate solution, dried, and the solvent is removed by rotary evaporation to obtain a crude product. The crude product is added with dichloromethane and trifluoroacetic acid, stirred at room temperature for 2-3 hours, washed with a saturated sodium bicarbonate solution, extracted with ethyl acetate, dried, and concentrated to obtain fluorinated diethylenetriamine. The fluorinated acyl chloride includes one or more of ethyl hexafluoroglutaryl chloride, heptafluorobutyryl chloride, chlorodifluoroacetyl chloride, and 5H-octylfluorovaleryl chloride.

5. The concrete thermal insulation and moisture retention blanket according to claim 1, characterized in that: The preparation method of the silicone-modified diethanolamine is as follows: Under a nitrogen atmosphere, 0.8 to 1.0 eq of an epoxy silane coupling agent and 1.2 to 3.0 eq of diethanolamine are added to a round-bottom flask, stirred and heated to 25 to 50° C., reacted for 2 to 4 hours, cooled to room temperature, and the excess diethanolamine is removed by reduced pressure distillation to obtain silicon-modified diethanolamine; the epoxy silane coupling agent includes one or more of γ-glycidyloxypropyltriethoxysilane, γ-glycidyloxypropyltrimethoxysilane, and β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane.

6. The concrete thermal insulation and moisture retention blanket according to claim 1, characterized in that: The preparation method of the benzobisthiadiazole hexylthiophene hydroxy compound is as follows: Under a nitrogen atmosphere, 4,4'-dimethoxydiphenylamine, 2-bromo-4-hexylthiophene, tris(dibenzylideneacetone)dipalladium, tri-tert-butylphosphine, sodium tert-butoxide and toluene were mixed, stirred and heated under reflux for 24 hours, extracted and purified by silica gel column chromatography to obtain a phenylthiopheneamine intermediate; at -78 ° C, n-butyllithium was added dropwise to a tetrahydrofuran solution of MPA-TC6 with stirring, and then tributyltin chloride was added and stirred at room temperature for 12 hours. After the reaction was completed, a saturated solution of potassium fluoride was added to quench the reaction to obtain a tributyltin phenylthiopheneamine intermediate; the tributyltin phenylthiopheneamine intermediate, 4,7-dibromobenzo[1,2-c:4,5-c']bis([1,2,5]thiadiazole), Tris(dibenzylideneacetone)dipalladium, tri(o-tolyl)phosphine and degassed ultra-dry toluene are mixed and reacted at 110° C. to obtain a benzobisthiadiazole hexylthiophene methyl ether compound; the benzobisthiadiazole hexylthiophene methyl ether compound is mixed with anhydrous dichloromethane, and a 20% by mass fraction of boron tribromide dichloromethane solution is added dropwise at a rate of 1 to 2 drops per second in an ice bath, while maintaining the temperature below 5° C. After the addition is complete, the ice bath is removed and the mixture is stirred at room temperature. After the reaction is completed, methanol is added dropwise to quench the reaction, and the mixture is stirred for 10 to 15 minutes. Saturated sodium bicarbonate solution and dichloromethane solution are then added for extraction, and the mixture is subjected to silica gel column chromatography to obtain the product benzobisthiadiazole hexylthiophene hydroxy compound, the structural formula of which is shown below:

7. The concrete thermal insulation and moisture retention blanket according to claim 1, characterized in that: The thermal insulation and moisture-retaining coating also includes a catalyst and an auxiliary agent; the catalyst includes one or more of dibutyltin dilaurate, stannous octoate, dimethyltin dineodecanoate and bismorpholino divinyl ether, and the auxiliary agent includes one or more of an inorganic filler, a plasticizer and a curing agent; the addition amount of the catalyst is 0.5 to 2 mol% of the total addition amount of the polyol and diisocyanate components, and the addition amount of the auxiliary agent is 0 to 30 mol% of the total addition amount of the polyol and diisocyanate components.

8. The concrete thermal insulation and moisture retention blanket according to claim 1, characterized in that: The preparation method of the thermal insulation and moisture-retaining coating comprises the following steps: (1) Polyethylene glycol, silicone-modified diethanolamine, N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonate, benzobisthiadiazole hexylthiophene hydroxy compound and auxiliary agent are mixed, stirred and heated to 110-120°C, and dehydrated under vacuum conditions for 1-2 hours; (2) Under nitrogen atmosphere, cool the system of step (1) to 60-70°C, add half of the fluorine-modified diisocyanate, half of the diisocyanate and half of the catalyst, stir and heat to 75-85°C, and react for 2-3 hours; (3) Add the remaining fluorine-modified diisocyanate, diisocyanate and catalyst to the system of step (2), continue stirring for 2 to 3 hours, and naturally cool to room temperature after the reaction is completed. Discharge the material to obtain a thermal insulation and moisture-retaining coating.

9. A method for preparing a concrete thermal insulation and moisture-retaining blanket, comprising the following steps: (a) Use a soft brush to remove dust, oil and particulate matter from the surface of the geotextile and set aside; The thermal insulation and moisture-retaining coating is applied to the upper and lower surfaces of the surface-treated composite geotextile by spraying or scraping, and then air-dried and solidified at 50-60° C. to obtain a modified composite geotextile; The thickness of the thermal insulation and moisture retention coating is 50 to 100 μm; (b) From the outside to the inside, the flame-retardant canvas, the aluminum foil rubber-plastic board, the composite geotextile and the adhesive felt are sequentially bonded, and then cut and sewn to obtain a concrete thermal insulation and moisture-retaining blanket; the bonding is performed using an adhesive, and the adhesive is one or more of polyurethane adhesive, acrylic adhesive and EVA hot melt adhesive.

10. Application of a concrete thermal insulation and moisture-retaining blanket in concrete. The application method of the concrete thermal insulation and moisture-retaining blanket in concrete is as follows: S1. Pre-attach the hook surface of the Velcro to the loop surface of the Velcro on the concrete insulation blanket. Each Velcro strip on the concrete insulation blanket must be tightly attached. S2. After the main structure formwork is removed, immediately apply concrete insulation blankets to the water-facing wall, laying them flat and evenly across the entire surface. Adjacent concrete insulation blankets must overlap properly, leaving no gaps. S3. After the concrete insulation blanket is firmly attached, sprinkle water into the gap between the concrete insulation blanket and the wall at the top edge. After sprinkling water, check whether the wall and the concrete insulation blanket are completely wet. S4. Daily inspections are required during the curing process. If the concrete insulation blanket falls off and the wall surface becomes dry, the fallen concrete insulation blanket should be reattached and the dry wall surface should be hydrated and maintained in a timely manner. S5. After the curing period, the concrete thermal insulation blanket shall be removed and recycled in a unified manner to avoid environmental pollution.

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