Building nano high-elastic heat-insulation waterproof multi-layer composite structure and construction method thereof

Abstract

The invention relates to the technical field of building composite structures, in particular to a building nano high-elastic heat-insulation waterproof multilayer composite structure and a construction method thereof. A permeable alkali-resistant enhancer bottom layer, a high-performance heat-insulating backing material layer, an alkali-resistant glass fiber gridding cloth layer, a high-performance heat-insulating backing material layer, a permeable alkali-resistant enhancer bottom layer, a nano reflective heat-insulating waterproof coating layer, a nano reflective heat-insulating waterproof coating layer and a permeable alkali-resistant enhancer surface layer are sequentially arranged from the base layer to the outside; the building composite structure can effectively block heat transfer, reduce building energy consumption and reduce the use frequency of an air conditioner, can resist an atmospheric weak acid environment, forms a continuous and compact waterproof barrier on a roof, an outer wall and other parts, avoids the leakage problem, can guarantee that the service life of the heat insulation and heat preservation coating is 10-30 years or above, effectively prolongs the service life of a room body, and is suitable for large-scale popularization and application. The maintenance and renovation cost is reduced, no harmful volatile matter is generated in the construction and use process, and human health and environmental safety are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of building composite structures, in particular to a building nano high-elastic heat-insulating and waterproof multi-layer composite structure and a construction method thereof. Background Art

[0002] Most of the current building composite structures are composed of a base layer, a leveling layer, an insulation layer, an anti-cracking layer, a waterproof layer and a finishing layer. The base layer is a concrete or masonry structure base, the leveling layer is a cement mortar leveling layer, the insulation layer generally uses polystyrene board, polyurethane foam, expanded perlite and rock wool, the anti-cracking layer is a finishing mortar + ordinary glass fiber mesh cloth, the waterproof layer is a modified asphalt waterproof membrane or polyurethane waterproof coating, and the finishing layer is putty + paint or facing bricks.

[0003] Traditional insulation materials have a thermal conductivity close to or higher than 0.04W / (m·K), and their performance degrades over time due to water absorption and aging. Structural joints and corners lack systematic insulation design, allowing heat to easily conduct through the base layer, reducing overall insulation efficiency. Traditional finishing layers serve only a decorative purpose and fail to reflect sunlight, leading to significant heat accumulation in summer. Rolled waterproofing layers rely on joint bonding and are prone to cracking and bulging in high or low temperature environments, leading to leakage. Solvent-based waterproofing coatings contain VOCs, making them environmentally unfriendly and lacking elasticity, making them difficult to adapt to base layer deformation. Traditional processes provide insufficient alkali resistance and reinforcement for the base layer, which can easily cause the waterproofing layer to separate from the base layer due to alkali efflorescence. The anti-cracking layer consists solely of ordinary finishing mortar and a single layer of fiberglass mesh. The mesh has poor alkali resistance and is prone to rust and fracture over time, leading to wall cracking. Traditional cement mortar leveling and insulation layers have high shrinkage rates, which can easily cause hollowing and cracking after construction, leading to leakage and insulation layer shedding.

[0004] Therefore, in order to address the problems of insufficient thermal insulation performance, weak waterproof and anti-seepage capabilities, poor crack resistance, insufficient durability, and poor environmental protection in the above-mentioned traditional building composite structures, a building nano-high-elastic thermal insulation and waterproof multi-layer composite structure and its construction method can be designed. Summary of the Invention

[0005] In order to overcome the problems of traditional building composite structures such as insufficient thermal insulation performance, weak waterproof and anti-seepage capabilities, poor crack resistance, insufficient durability and poor environmental protection.

[0006] The technical solution of the present invention is: a building nano high-elastic thermal insulation and waterproof multi-layer composite structure, which is sequentially provided with a penetrating anti-alkali strengthener bottom layer, a high-performance thermal insulation base material layer, an alkali-resistant glass fiber mesh cloth layer, a high-performance thermal insulation base material layer, a penetrating anti-alkali strengthener bottom layer, a nano-reflective thermal insulation and waterproof coating layer, a nano-reflective thermal insulation and waterproof coating layer, and a penetrating anti-alkali strengthener surface layer from the base layer to the outside.

[0007] Preferably, the bottom layer of the penetrating anti-alkali enhancer adopts a penetrating anti-alkali enhancer to enhance the adhesion and alkali resistance of the base layer. The penetrating anti-alkali enhancer is an environmentally friendly single-component water-based emulsion, including 40%-50% high-grade polymer emulsion, 5%-10% penetration aid, 8%-12% anti-alkali agent, 3%-5% film-forming aid, 1%-3% thickener, 0.5%-1% preservative and 25%-35% water.

[0008] Preferably, the high-performance thermal insulation base material layer adopts a high-performance thermal insulation base material with a thermal conductivity of ≤0.06W / (m・K) to block heat transfer; the high-performance thermal insulation base material is a single-component paste or powder material, including 50%-60% high-quality inorganic thermal insulation material, 15%-25% high molecular polymer modified material, 10%-15% cement, 2%-5% fiber, 1%-3% water-retaining agent, 0.5%-2% water-reducing agent, 1%-1.5% antifreeze agent and 1%-1.5% early strength agent. When mixing the powder material, the powder and clean water are mixed according to the proportion marked on the package, and the ratio of powder to clean water ranges from 3.33:1 to 4:1.

[0009] Preferably, the alkali-resistant glass fiber mesh cloth layer is composed of alkali-resistant glass fiber mesh cloth, and the alkali-resistant glass fiber mesh cloth is used to enhance the anti-cracking performance of the structure.

[0010] As a preferred choice, the nano-reflective heat-insulating waterproof coating layer adopts nano-reflective heat-insulating waterproof coating, which has the functions of reflection, waterproofing, heat insulation, anti-corrosion and thermal insulation, with a solar reflectance of more than 40%, an emissivity of more than 90%, and a thermal conductivity of less than 0.04W / (m・K); the nano-reflective heat-insulating waterproof coating is divided into type A suitable for general roofs, exterior walls, and color steel tiles, and type B suitable for steel roofs. Among them, type A nano-reflective heat-insulating waterproof coating includes 45%-55% high elastic polymer emulsion, 15%-25% nano-level reflective inorganic insulation material, 10%-20% Filler, 5%-10% waterproofing aid, 3%-5% film-forming aid, 1%-3% dispersant, 0.5%-1% preservative and 15%-25% water; in type B nano-reflective thermal insulation waterproof coating, component A consists of: 50%-60% resin base material, 15%-25% nano-reflective inorganic thermal insulation material, 10%-20% filler, 1%-3% dispersant and 5%-10% solvent; component B consists of: 60%-70% curing agent, 5%-10% accelerator, 5%-8% defoaming agent and 5%-7% anti-settling agent.

[0011] The construction method of the nano high elastic thermal insulation and waterproof multilayer composite structure for buildings includes the above-mentioned nano high elastic thermal insulation and waterproof multilayer composite structure for buildings, and the steps are as follows: S1: Base surface treatment Remove oil stains and loose materials from the surface of the base, polish the smooth base surface, and apply penetrating anti-alkali strengthener to the dusty and sandy base surface for reinforcement; S2: First layer construction Apply the penetrating alkali-resistant enhancer on the treated base surface with a roller, sprayer or brush to form a base layer. Keep the construction environment dry and ventilated, and do not add diluent. The coating area is 3-8 square meters / KG; S3: Second layer construction S31: Prepare high-performance thermal insulation base material. If it is a powder material, mix the powder and water according to the ratio marked on the package, stir with an electric stirrer until it becomes a paste without particles, let it stand for 5 minutes to mature, and then stir again. After stirring, use a scraper to scrape the first layer in batches. The thickness of the first layer should be ≤3mm. Dry it at 25℃ and 50% humidity for 4 hours, and then scrape the second layer in batches. The total thickness is 5-10mm. S4: Third layer construction When the second layer of high-performance thermal insulation base material is not completely dry, press the alkali-resistant glass fiber mesh cloth into the coating evenly. The overlap of the mesh cloth should be no less than 100mm to avoid hollowing. S5: Fourth floor construction Apply high-performance insulation primer again on the laid mesh cloth to ensure the surface is smooth. After drying for 24-48 hours, proceed to the next step. The total thickness reaches 5-10mm. S6: Fifth floor construction After the fourth layer is dried and polished, apply the penetrating alkali-resistant enhancer again to form a base layer to enhance the adhesion with subsequent coatings; S7: Construction of the sixth and seventh floors Choose the corresponding Type A or Type B nano-reflective heat-insulating waterproof coating, stir it evenly, and then apply it by brushing, rolling or spraying. Add no more than 5% water to dilute the first coat. The interval between each coat should be no less than 4 hours, and a total of two coats should be applied. The dosage of the nano-reflective heat-insulating waterproof coating is 1-2kg / ㎡. The interval should be extended at low temperatures. S8: Construction of the eighth floor After the sixth and seventh layers have dried, use a brush or roller to evenly apply a layer of penetrating anti-alkali strengthener to form a surface layer. After drying, the construction is completed.

[0012] Preferably, in step S1, the concave and convex parts are leveled with mortar, and the base surface with strong water absorption needs to be pre-wetted until there is no visible water.

[0013] Preferably, in step S7, when the nano-reflective thermal insulation and waterproof coating is constructed by spraying, a large-caliber spray gun is used, the pressure is set to 4.5 MPa, and the water ratio is 5%; when the nano-reflective thermal insulation and waterproof coating is constructed by brushing or rolling, the reinforced type requires three coats of construction. After stirring evenly, the first coat is diluted with ≤5% water and used to penetrate the base layer. After drying for 4 hours, the second and third coats are directly applied without adding water. The cracks are first sealed with polyester cloth, and then large-scale construction is carried out; for the long-term type, waterproof cloth needs to be laid in the first coat, and the second and third coats are applied after drying.

[0014] Preferably, the overall construction environment temperature is controlled at 5°C-35°C, the humidity does not exceed 85%, and the moisture content of the base layer does not exceed 10%.

[0015] Beneficial effects of the present invention: In the building composite structure, the high-performance thermal insulation base material has a thermal conductivity of ≤0.06W / (m·K). Combined with the nano-reflective thermal insulation and waterproof coating, the solar reflectance exceeds 40%, the emissivity exceeds 90%, and the thermal conductivity is less than 0.04W / (m·K). This can reduce the outdoor coated surface temperature by more than 10-20℃ and the indoor temperature by 5-10℃, effectively blocking heat transfer, reducing building energy consumption, and reducing the frequency of air conditioning use, thereby achieving energy conservation and consumption reduction. Multi-layer waterproof design, nano-reflective heat-insulating waterproof coating has 5-in-1 functions, good elasticity, strong crack resistance, can adapt to the deformation of the base layer to prevent cracking, and can withstand the weak acid environment of the atmosphere, forming a continuous and dense waterproof barrier on the roof, exterior walls and other parts to avoid leakage problems; The base layer is reinforced with a penetrating alkali-resistant intensifier, and the alkali-resistant glass fiber mesh and flexible thermal insulation base material work together to enhance crack resistance. The nano-reflective thermal insulation and waterproof coating is highly weather-resistant and corrosion-resistant, ensuring a lifespan of more than 10-30 years for the thermal insulation coating, effectively extending the service life of the building and reducing maintenance and renovation costs. All materials are formulated with environmentally friendly formulas. The penetrating anti-alkali enhancer, high-performance thermal insulation base material, and nano-reflective thermal insulation and waterproof coating are all water-based products, non-toxic and harmless, in line with national environmental protection standards. No harmful volatiles are emitted during construction and use, ensuring human health and environmental safety. The material has various construction methods and is easy to operate. The single-component design reduces the complexity of mixing. The powdered insulation base material can be mixed with water in proportion and then used. The construction intervals of each layer of material are clear, which allows continuous operation and effectively shortens the construction period. Nano-reflective heat-insulating waterproof coating integrates reflection, waterproofing, heat insulation, anti-corrosion, thermal insulation and sound insulation functions. Spraying 0.8mm can reduce sound wave conduction by more than 8.8dB, reduce external noise interference, and at the same time has anti-corrosion properties, protects building substrates, and improves the overall performance of buildings. Different types of materials can be selected for different building parts and base conditions, and diverse needs can be met by adjusting the construction design. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the embodiments.

[0017] Example 1 The present invention provides an embodiment: a nano-high elastic thermal insulation and waterproof multi-layer composite structure for construction, which is provided with, from the base layer outward, a permeable anti-alkali strengthening agent bottom layer, a high-performance thermal insulation base material layer, an alkali-resistant glass fiber mesh cloth layer, a high-performance thermal insulation base material layer, a permeable anti-alkali strengthening agent bottom layer, a nano-reflective thermal insulation and waterproof coating layer, a nano-reflective thermal insulation and waterproof coating layer, and a permeable anti-alkali strengthening agent surface layer; Penetrating anti-alkali enhancer The bottom layer adopts penetrating anti-alkali enhancer to enhance the adhesion and alkali resistance of the base layer. The penetrating anti-alkali enhancer is an environmentally friendly single-component water-based emulsion, including 40% high-grade polymer emulsion, 5% penetration aid, 8% anti-alkali agent, 3% film-forming aid, 1% thickener, 0.5% preservative and 25% water.

[0018] The high-performance thermal insulation base material layer adopts high-performance thermal insulation base material with a thermal conductivity of ≤0.06W / (m・K) to block heat transfer; the high-performance thermal insulation base material is a single-component paste or powder material, including 50% high-quality inorganic thermal insulation material, 15% high molecular polymer modified material, 10% cement, 2% fiber, 1% water-retaining agent, 0.5% water-reducing agent, 1% antifreeze agent and 1% early strength agent. When mixing the powder material, the powder and clean water are mixed according to the ratio marked on the package, and the ratio of powder to clean water is 3.33:1.

[0019] The alkali-resistant glass fiber mesh cloth layer is composed of alkali-resistant glass fiber mesh cloth, which is used to enhance the anti-cracking performance of the structure.

[0020] The nano-reflective heat-insulating waterproof coating layer adopts nano-reflective heat-insulating waterproof coating, which has the functions of reflection, waterproofing, heat insulation, anti-corrosion and heat preservation. The solar reflectance is more than 40%, the emissivity is more than 90%, and the thermal conductivity is less than 0.04W / (m・K); the nano-reflective heat-insulating waterproof coating is divided into type A suitable for general roofs, exterior walls, and color steel tiles and type B suitable for steel roofs. Among them, type A nano-reflective heat-insulating waterproof coating includes 45% high elastic polymer latex Liquid, 15% nano-reflective pigment, 10% filler, 5% waterproofing agent, 3% film-forming agent, 1% dispersant, 0.5% preservative and 15% water; in type B nano-reflective thermal insulation waterproof coating, the components of component A are: 50% resin base material, 15% nano-reflective pigment, 10% filler, 1% dispersant and 5% solvent; the components of component B are: 60% curing agent, 5% accelerator, 5% defoaming agent and 5% anti-settling agent.

[0021] The construction method of the nano high elastic thermal insulation and waterproof multilayer composite structure for buildings includes the above-mentioned nano high elastic thermal insulation and waterproof multilayer composite structure for buildings, and the steps are as follows: S1: Base surface treatment Remove oil and loose materials from the surface of the base, polish the smooth base surface, and apply penetrating anti-alkali strengthener to the dusty and sandy base surface for reinforcement; use mortar to level the uneven areas, and the water-absorbent base surface needs to be pre-moistened until there is no visible water; S2: First layer construction Apply the penetrating alkali-resistant enhancer on the treated base surface with a roller, sprayer or brush to form a base layer. Keep the construction environment dry and ventilated, and do not add diluent. The coating area is 3-8 square meters / KG; S3: Second layer construction S31: Prepare high-performance thermal insulation base material. If it is a powder material, mix the powder and water according to the ratio marked on the package, stir with an electric stirrer until it becomes a paste without particles, let it stand for 5 minutes to mature, and then stir again. After stirring, use a scraper to scrape the first layer in batches. The thickness of the first layer should be ≤3mm. Dry it at 25℃ and 50% humidity for 4 hours, and then scrape the second layer in batches. The total thickness is 5-10mm. S4: Third layer construction When the second layer of high-performance thermal insulation base material is not completely dry, press the alkali-resistant glass fiber mesh cloth into the coating evenly. The overlap of the mesh cloth should be no less than 100mm to avoid hollowing. S5: Fourth floor construction Apply high-performance insulation primer again on the laid mesh cloth to ensure the surface is smooth. After drying for 24-48 hours, proceed to the next step. The total thickness reaches 5-10mm. S6: Fifth floor construction After the fourth layer is dried and polished, apply the penetrating alkali-resistant enhancer again to form a base layer to enhance the adhesion with subsequent coatings; S7: Construction of the sixth and seventh floors Choose the corresponding Type A or Type B nano-reflective heat-insulating waterproof coating, stir it evenly, and then apply it by brushing, rolling or spraying. Add no more than 5% water to dilute the first coat. The interval between each coat should be no less than 4 hours, and a total of two coats should be applied. The dosage of the nano-reflective heat-insulating waterproof coating is 1-2kg / ㎡. The interval should be extended at low temperatures. When the nano reflective thermal insulation and waterproof coating is applied by spraying, a large-caliber spray gun is used, the pressure is set to 4.5 MPa, and the water ratio is 5%; When the nano-reflective heat-insulating waterproof coating is applied by brushing or rolling, the reinforced type needs to be applied three times. After stirring evenly, the first coat is diluted with ≤5% water and used to penetrate the base layer. After drying for 4 hours, the second and third coats can be directly applied without adding water. The cracks should be sealed with polyester cloth first, and then applied on a large area. For the long-term type, waterproof cloth should be laid in the first coat, and the second and third coats should be applied after drying. S8: Construction of the eighth floor After the sixth and seventh layers have dried, use a brush or roller to evenly apply a layer of penetrating anti-alkali strengthener to form a surface layer. After drying, the construction is completed.

[0022] The overall construction environment temperature is controlled at 5℃-35℃, the humidity does not exceed 85%, and the moisture content of the base layer does not exceed 10%.

[0023] Example 2 The present invention provides an embodiment: a nano-high elastic thermal insulation and waterproof multi-layer composite structure for construction, which is provided with, from the base layer outward, a permeable anti-alkali strengthening agent bottom layer, a high-performance thermal insulation base material layer, an alkali-resistant glass fiber mesh cloth layer, a high-performance thermal insulation base material layer, a permeable anti-alkali strengthening agent bottom layer, a nano-reflective thermal insulation and waterproof coating layer, a nano-reflective thermal insulation and waterproof coating layer, and a permeable anti-alkali strengthening agent surface layer; Penetrating anti-alkali enhancer The bottom layer adopts penetrating anti-alkali enhancer to enhance the adhesion and alkali resistance of the base layer. The penetrating anti-alkali enhancer is an environmentally friendly single-component water-based emulsion, including 50% high-grade polymer emulsion, 10% penetration aid, 12% anti-alkali agent, 5% film-forming aid, 3% thickener, 1% preservative and 35% water.

[0024] The high-performance thermal insulation base material layer adopts high-performance thermal insulation base material with a thermal conductivity of ≤0.06W / (m・K) to block heat transfer; the high-performance thermal insulation base material is a single-component paste or powder material, including 60% high-quality inorganic thermal insulation material, 25% high molecular polymer modified material, 15% cement, 5% fiber, 3% water-retaining agent, 2% water-reducing agent, 1.5% antifreeze agent and 1.5% early strength agent. When mixing the powder material, the powder and clean water are mixed according to the ratio marked on the package, and the ratio of powder to clean water is 4:1.

[0025] The alkali-resistant glass fiber mesh cloth layer is composed of alkali-resistant glass fiber mesh cloth, which is used to enhance the anti-cracking performance of the structure.

[0026] The nano-reflective heat-insulating waterproof coating layer adopts nano-reflective heat-insulating waterproof coating, which has the functions of reflection, waterproofing, heat insulation, anti-corrosion and thermal insulation. The solar reflectance is more than 40%, the emissivity is more than 90%, and the thermal conductivity is less than 0.04W / (m・K). The nano-reflective heat-insulating waterproof coating is divided into type A suitable for general roofs, exterior walls, and color steel tiles, and type B suitable for steel roofs. Among them, type A nano-reflective heat-insulating waterproof coating includes 55% high elastic polymer emulsion. , 25% nano-reflective pigments, 20% fillers, 10% waterproofing agents, 5% film-forming agents, 3% dispersants, 1% preservatives and 25% water; in type B nano-reflective thermal insulation and waterproof coating, the components of component A are: 60% resin base material, 25% nano-reflective pigments, 20% fillers, 3% dispersants and 10% solvents; the components of component B are: 70% curing agent, 10% accelerator, 8% defoaming agent and 7% anti-settling agent.

[0027] The construction method of the nano high elastic thermal insulation and waterproof multilayer composite structure for buildings includes the above-mentioned nano high elastic thermal insulation and waterproof multilayer composite structure for buildings, and the steps are as follows: S1: Base surface treatment Remove oil and loose materials from the surface of the base, polish the smooth base surface, and apply penetrating anti-alkali strengthener to the dusty and sandy base surface for reinforcement; use mortar to level the uneven areas, and the water-absorbent base surface needs to be pre-moistened until there is no visible water; S2: First layer construction Apply the penetrating alkali-resistant enhancer on the treated base surface with a roller, sprayer or brush to form a base layer. Keep the construction environment dry and ventilated, and do not add diluent. The coating area is 3-8 square meters / KG; S3: Second layer construction S31: Prepare high-performance thermal insulation base material. If it is a powder material, mix the powder and water according to the ratio marked on the package, stir with an electric stirrer until it becomes a paste without particles, let it stand for 5 minutes to mature, and then stir again. After stirring, use a scraper to scrape the first layer in batches. The thickness of the first layer should be ≤3mm. Dry it at 25℃ and 50% humidity for 4 hours, and then scrape the second layer in batches. The total thickness is 5-10mm. S4: Third layer construction When the second layer of high-performance thermal insulation base material is not completely dry, press the alkali-resistant glass fiber mesh cloth into the coating evenly. The overlap of the mesh cloth should be no less than 100mm to avoid hollowing. S5: Fourth floor construction Apply high-performance insulation primer again on the laid mesh cloth to ensure the surface is smooth. After drying for 24-48 hours, proceed to the next step. The total thickness reaches 5-10mm. S6: Fifth floor construction After the fourth layer is dried and polished, apply the penetrating alkali-resistant enhancer again to form a base layer to enhance the adhesion with subsequent coatings; S7: Construction of the sixth and seventh floors Choose the corresponding Type A or Type B nano-reflective heat-insulating waterproof coating, stir it evenly, and then apply it by brushing, rolling or spraying. Add no more than 5% water to dilute the first coat. The interval between each coat should be no less than 4 hours, and a total of two coats should be applied. The dosage of the nano-reflective heat-insulating waterproof coating is 1-2kg / ㎡. The interval should be extended at low temperatures. When the nano reflective thermal insulation and waterproof coating is applied by spraying, a large-caliber spray gun is used, the pressure is set to 4.5 MPa, and the water ratio is 5%; When the nano-reflective heat-insulating waterproof coating is applied by brushing or rolling, the reinforced type needs to be applied three times. After stirring evenly, the first coat is diluted with ≤5% water and used to penetrate the base layer. After drying for 4 hours, the second and third coats can be directly applied without adding water. The cracks should be sealed with polyester cloth first, and then applied on a large area. For the long-term type, waterproof cloth should be laid in the first coat, and the second and third coats should be applied after drying. S8: Construction of the eighth floor After the sixth and seventh layers have dried, use a brush or roller to evenly apply a layer of penetrating anti-alkali strengthener to form a surface layer. After drying, the construction is completed.

[0028] The overall construction environment temperature is controlled at 5℃-35℃, the humidity does not exceed 85%, and the moisture content of the base layer does not exceed 10%.

[0029] Experimental example Three building areas were selected for experiments, respectively using the above embodiment 1 as experimental example 1, the above embodiment 2 as experimental example 2, and a traditional composite structure as experimental example 3. The base of the traditional composite structure was a C30 concrete slab, the leveling layer was a 20 mm thick 1:3 cement mortar, the insulation layer was a 50 mm thick EPS polystyrene board, the anti-cracking layer was a 5 mm thick plastering mortar + ordinary glass fiber mesh cloth, the waterproof layer was a 2 mm thick solvent-based polyurethane waterproof coating, and the finishing layer was an exterior wall paint; 1) Thermal insulation performance test The specimens were placed in the same outdoor environment, such as a sunny day in summer with an outdoor temperature of 35°C, and the maximum temperature of the outer surface of Experimental Example 1, Experimental Example 2, and Experimental Example 3 from 12:00 to 14:00 and the temperature of the corresponding position indoors were measured; 2) Waterproof performance test Apply water pressure to the back of Experimental Examples 1, 2, and 3 in increments of 0.1 MPa, and record the maximum pressure value when leakage occurs; 3) Crack resistance test A mechanical device was used to create a 0.3 mm crack in the base layer, and the crack expansion of the surface coating of the two groups of specimens was observed, and the maximum crack width was recorded; 4) Durability test The specimens were placed in a UV aging box for 500 hours, and the thermal conductivity retention rate and the anti-seepage pressure retention rate before and after aging were tested. The experimental data are shown in Table 1: Table 1 As shown in Table 1, the thermal conductivity of the nano-high elastic thermal insulation and waterproof multi-layer composite structure of the present invention is reduced by 44.8%, and the surface temperature is reduced by 27%, with significant energy-saving effects. The high elasticity and density of the nano-reflective heat-insulating and waterproof coating increase the anti-seepage pressure by 200%. Traditional polyurethane coatings are prone to cracking and leakage due to deformation of the base layer. The anti-cracking system of double-layer thermal insulation base material + alkali-resistant glass fiber mesh cloth controls the crack width to 0.08mm, which is only 1 / 3 of the traditional structure; The nano high-elastic heat-insulating and waterproof multi-layer composite structure of the present invention has excellent resistance to ultraviolet aging. After 500 hours of aging, the key performance retention rate exceeds 90%, far exceeding the 60%-75% of traditional materials.

Claims

1. The building nano high elastic heat insulation waterproof multi-layer composite structure is characterized by: From the base layer to the outside, there are arranged in sequence: a penetrating anti-alkali strengthener bottom layer, a high-performance thermal insulation base material layer, an alkali-resistant glass fiber mesh cloth layer, a high-performance thermal insulation base material layer, a penetrating anti-alkali strengthener bottom layer, a nano-reflective thermal insulation waterproof coating layer, a nano-reflective thermal insulation waterproof coating layer, and a penetrating anti-alkali strengthener surface layer.

2. The nano-high elastic thermal insulation and waterproof multi-layer composite structure for construction according to claim 1, characterized in that: Penetrating anti-alkali enhancer The bottom layer adopts penetrating anti-alkali enhancer to enhance the adhesion and alkali resistance of the base layer. The penetrating anti-alkali enhancer is an environmentally friendly single-component water-based emulsion, including 40%-50% high-grade polymer emulsion, 5%-10% penetration aid, 8%-12% anti-alkali agent, 3%-5% film-forming aid, 1%-3% thickener, 0.5%-1% preservative and 25%-35% water.

3. The nano-high elastic thermal insulation and waterproof multi-layer composite structure for construction according to claim 1, characterized in that: The high-performance thermal insulation base material layer adopts high-performance thermal insulation base material with a thermal conductivity coefficient of ≤0.06W / (m・K) to block heat transfer; the high-performance thermal insulation base material is a single-component paste or powder material, including 50%-60% high-quality inorganic thermal insulation material, 15%-25% high molecular polymer modified material, 10%-15% cement, 2%-5% fiber, 1%-3% water-retaining agent, 0.5%-2% water-reducing agent, 1%-1.5% antifreeze agent and 1%-1.5% early strength agent. When mixing the powder material, the powder and clean water are mixed according to the ratio marked on the package, and the ratio of powder to clean water ranges from 3.33:1 to 4:

1.

4. The nano-high elastic thermal insulation and waterproof multi-layer composite structure for construction according to claim 1, characterized in that: The alkali-resistant glass fiber mesh cloth layer is composed of alkali-resistant glass fiber mesh cloth, which is used to enhance the anti-cracking performance of the structure.

5. The nano-high elastic heat-insulating and waterproof multi-layer composite structure for construction according to claim 1, characterized in that: Nano-reflective heat-insulating waterproof coating layer adopts nano-reflective heat-insulating waterproof coating, which has reflective, waterproof, heat-insulating, anti-corrosion and thermal insulation functions, with a solar reflectance of more than 40%, an emissivity of more than 90%, and a thermal conductivity of less than 0.04W / (m・K); Nano-reflective heat-insulating waterproof coating is divided into Type A suitable for general roofs, exterior walls, and color steel tiles, and Type B suitable for steel roofs. Among them, Type A nano-reflective heat-insulating waterproof coating includes 45%-55% high elastic polymer emulsion, 15%-25% nano-reflective inorganic insulation material, 10%-20% filler Material, 5%-10% waterproofing agent, 3%-5% film-forming agent, 1%-3% dispersant, 0.5%-1% preservative and 15%-25% water; in type B nano-reflective thermal insulation waterproof coating, the components of component A are: 50%-60% resin base material, 15%-25% nano-reflective inorganic thermal insulation material, 10%-20% filler, 1%-3% dispersant and 5%-10% solvent; the components of component B are: 60%-70% curing agent, 5%-10% accelerator, 5%-8% defoaming agent and 5%-7% anti-settling agent.

6. Construction method of building nano high elastic thermal insulation waterproof multi-layer composite structure, characterized by The method comprises the following steps: S1: Base surface treatment Remove oil stains and loose materials from the surface of the base, polish the smooth base surface, and apply penetrating anti-alkali strengthener to the dusty and sandy base surface for reinforcement; S2: First layer construction Apply the penetrating alkali-resistant enhancer on the treated base surface with a roller, sprayer or brush to form a base layer. Keep the construction environment dry and ventilated, and do not add diluent. The coating area is 3-8 square meters / KG; S3: Second layer construction S31: Prepare high-performance thermal insulation base material. If it is a powder material, mix the powder and water according to the ratio marked on the package, stir with an electric stirrer until it becomes a paste without particles, let it stand for 5 minutes to mature, and then stir again. After stirring, use a scraper to scrape the first layer in batches. The thickness of the first layer should be ≤3mm. Dry it at 25℃ and 50% humidity for 4 hours, and then scrape the second layer in batches. The total thickness is 5-10mm. S4: Third layer construction When the second layer of high-performance thermal insulation base material is not completely dry, press the alkali-resistant glass fiber mesh cloth into the coating evenly. The overlap of the mesh cloth should be no less than 100mm to avoid hollowing. S5: Fourth floor construction Apply high-performance insulation primer again on the laid mesh cloth to ensure the surface is smooth. After drying for 24-48 hours, proceed to the next step. The total thickness reaches 5-10mm. S6: Fifth floor construction After the fourth layer is dried and polished, apply the penetrating alkali-resistant enhancer again to form a base layer to enhance the adhesion with subsequent coatings; S7: Construction of the sixth and seventh floors Choose the corresponding Type A or Type B nano-reflective heat-insulating waterproof coating, stir it evenly, and then apply it by brushing, rolling or spraying. Add no more than 5% water to dilute the first coat. The interval between each coat should be no less than 4 hours, and a total of two coats should be applied. The dosage of the nano-reflective heat-insulating waterproof coating is 1-2kg / ㎡. The interval should be extended at low temperatures. S8: Construction of the eighth floor After the sixth and seventh layers have dried, use a brush or roller to evenly apply a layer of penetrating anti-alkali strengthener to form a surface layer. After drying, the construction is completed.

7. The construction method of the nano high-elastic heat-insulating waterproof multi-layer composite structure according to claim 6 is characterized by: In step S1, mortar is used to level the uneven surfaces, and the base surface with strong water absorption needs to be pre-wetted until there is no visible water.

8. The construction method of the nano high-elastic heat-insulating waterproof multi-layer composite structure according to claim 6 is characterized by: In step S7, when the nano-reflective thermal insulation waterproof coating is constructed by spraying, a large-caliber spray gun is used, the pressure is set to 4.5 MPa, and the water ratio is 5%; when the nano-reflective thermal insulation waterproof coating is constructed by brushing or rolling, the reinforced type requires three coats of construction. After stirring evenly, the first coat is diluted with ≤5% water to penetrate the base layer. After drying for 4 hours, the second and third coats are directly applied without adding water. The cracks are first sealed with polyester cloth, and then large-scale construction is carried out; for the long-term type, waterproof cloth needs to be laid in the first coat of coating, and the second and third coats are applied after drying.

9. The construction method of the nano high-elastic heat-insulating waterproof multi-layer composite structure according to claim 6, characterized in that: The overall construction environment temperature is controlled at 5℃-35℃, the humidity does not exceed 85%, and the moisture content of the base layer does not exceed 10%.

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