Wall surface waterproof layer integrated spraying and film forming process

Abstract

The invention discloses a wall surface waterproof layer integrated spraying and film forming process which comprises the following steps: base layer treatment: removing wall surface floating ash, greasy dirt and loose particles to ensure that a base layer is firm; material preparation: a double-component spraying material A and a double-component spraying material B are prepared, the component A comprises alkoxy silane modified resin and a nano-catalyst, and the component B comprises light-cured resin and a microcapsule curing agent; the method has the beneficial effects that a coating with enough thickness can be formed through single-time construction in a spraying mode, the material can be rapidly and preliminarily solidified after being applied to a wall, the problem that the coating flows on a vertical surface is effectively solved, the overall construction speed is increased, normal construction is allowed in a micro-damp state of the wall surface by actively regulating and controlling a construction medium, and the construction efficiency is improved. The limitation of environment humidity and temperature on operation conditions is reduced, the effective construction time is prolonged, decoration treatment such as colored sand embellishment or texture embossing can be synchronously completed in the initial setting stage of a coating, and the double effects of water resistance and facing are achieved at a time.

Description

Technical Field

[0001] This invention relates to the field of building waterproofing construction technology, specifically to an integrated spraying film-forming process for wall waterproofing layers. Background Technology

[0002] Waterproofing building walls is a crucial step in ensuring the structural durability and interior comfort of a building. Currently, common construction methods include manual brushing, roller coating, and laying waterproof membranes. Manual brushing and roller coating are less efficient, and it is difficult to ensure the uniformity of the coating thickness. They also involve multiple steps and are prone to defects such as missed areas and blistering. While laying membranes can provide a continuous waterproof layer, it is difficult to construct on vertical surfaces, has complex joint treatment, and requires a very high degree of flatness of the substrate.

[0003] In recent years, spraying technologies such as high-pressure airless spraying have been introduced into the waterproofing field. They offer high construction efficiency and continuous coatings. However, in practical applications, especially when applying a thick coating to vertical walls in one go, issues such as material sagging, curing being greatly affected by ambient temperature and humidity, and stringent requirements for substrate dryness are common. For example, while existing sprayed polyurea technology cures quickly, it is costly and has extremely strict requirements for substrate treatment and construction environment. Ordinary polymer emulsion spraying, on the other hand, suffers from slow drying and thin film formation in one application. Therefore, this application proposes an integrated spraying film-forming process for wall waterproofing layers. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated spray coating process for waterproofing walls to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an integrated spray coating process for waterproofing wall surfaces, comprising the following steps: S1. Base treatment: Remove floating dust, oil stains and loose particles from the wall surface to ensure a solid base; S2. Material preparation: Prepare two-component spraying materials A and B. Component A contains alkoxysilane modified resin and nano-catalyst, and component B contains photocurable resin and microcapsule curing agent. S3. Equipment debugging: Start the spraying equipment, preheat and dehumidify the compressed air, connect the material supply pipeline to the static mixing spray gun, and adjust the spraying pressure. S4. Spraying operation: Mix components A and B in the spray gun and spray them onto the wall to form a single wet film. S5, Stepped curing film formation: The coating sequentially goes through the anchoring stage, the shaping stage and the strengthening stage; S6. Quality Inspection: After curing, check the continuity and thickness of the coating.

[0006] Preferably, in the base treatment of step S1, for locally damp areas with a moisture content higher than 8% but lower than 12%, a hot air gun is used for local auxiliary drying treatment to reduce the moisture content of the area to below 8% before proceeding with the spraying operation of S4.

[0007] Preferably, in step S3, the temperature for preheating the compressed air is 40-50°C, and the air is dehumidified to a dew point below -10°C. The preheating temperature and the dew point after dehumidification are controlled by the built-in sensors and control modules of the equipment.

[0008] Preferably, in step S4, a segmented continuous spraying method is used, which divides the construction wall into multiple work sections, sprays continuously within a single work section, controls the connection time between sections to within 3 minutes, and the spray gun movement path is horizontal reciprocating, with adjacent spraying bands overlapping by less than one-half.

[0009] Preferably, the spraying in step S4 adopts a fan-shaped spraying method, with the spray gun perpendicular to the wall surface, maintaining a distance of 30-50cm, moving at a uniform speed of 0.8-1.2m / s, and the thickness of a single wet film is controlled at 2-2.5mm.

[0010] Preferably, during the spraying process in step S4, an online wet film thickness detection device is used for real-time monitoring, and the thickness data is fed back to the control system. When the monitored thickness deviates from the preset range of 2-2.5mm, the control system automatically adjusts the spray gun moving speed or the material output flow rate to restore the wet film thickness to the set range.

[0011] Preferably, the anchoring stage of step S5 is 0-3 minutes after spraying, and a physical method is used to intervene on the surface of the initial solidified coating. The intervention method is to spray decorative colored sand or use an embossing roller to process the surface texture.

[0012] Preferably, in the shaping stage of step S5, when the ambient light intensity is continuously below 200 Lux, an ultraviolet auxiliary light source is activated to supplement the irradiation of the coating surface. The wavelength of the ultraviolet auxiliary light source is 320-390 nm, the irradiation intensity is 30-50 mW / cm², and the irradiation time is 20-40 minutes.

[0013] Preferably, the quality inspection in step S6 includes coating appearance inspection and thickness detection, with a thickness ≥1.8mm and a deviation ≤±0.2mm, and an adhesion ≥2.0MPa.

[0014] Compared with existing technologies, the beneficial effects of this invention are as follows: by using a spraying method, a coating of sufficient thickness can be formed in a single application, and the material can quickly and initially solidify after being applied to the wall, effectively overcoming the problem of paint flowing on vertical surfaces, thus improving the overall construction speed. Through active control of the construction medium, normal construction is allowed even when the wall surface is slightly damp, reducing the limitations of environmental humidity and temperature on working conditions and extending the effective construction time. It is worth mentioning that decorative treatments such as colored sand embellishment or textured embossing can be completed simultaneously during the initial setting stage of the coating, achieving both waterproofing and finishing effects in one go, simplifying the process. Detailed Implementation

[0015] The following detailed description of an integrated spray coating process for waterproofing walls provided by the present invention, with reference to specific embodiments, is provided. It should also be noted that, to make the embodiments more comprehensive, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies.

[0016] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0017] Generally, terms can be understood at least partially from their use in context. For example, depending at least partially on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but can instead, depending at least partially on the context, allow for the presence of other factors that are not necessarily explicitly described. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of this invention.

[0018] This invention provides a technical solution: an integrated spray coating process for waterproofing wall layers, comprising the following steps: S1. Base treatment: Remove floating dust, oil stains and loose particles from the wall surface to ensure a solid base; S2. Material preparation: Prepare two-component spraying materials A and B. Component A contains alkoxysilane modified resin and nano-catalyst, and component B contains photocurable resin and microcapsule curing agent. S3. Equipment debugging: Start the spraying equipment, preheat and dehumidify the compressed air, connect the material supply pipeline to the static mixing spray gun, and adjust the spraying pressure. S4. Spraying operation: Mix components A and B in the spray gun and spray them onto the wall to form a single wet film. S5, Stepped curing film formation: The coating sequentially goes through the anchoring stage, the shaping stage and the strengthening stage; S6. Quality Inspection: After curing, check the continuity and thickness of the coating.

[0019] In step S1, for localized damp areas with a moisture content higher than 8% but lower than 12%, a hot air gun is used for localized auxiliary drying to reduce the moisture content of the area to below 8% before proceeding with the spraying operation in step S4.

[0020] In step S3, the temperature for preheating the compressed air is 40-50℃, and the air is dehumidified to a dew point below -10℃. The preheating temperature and the dew point after dehumidification are controlled by the built-in sensors and control modules of the equipment.

[0021] In step S4, a segmented continuous spraying method is adopted, which divides the construction wall into multiple work sections and sprays continuously within a single work section. The connection time between sections is controlled within 3 minutes, the spray gun movement path is horizontal reciprocating, and the overlap of adjacent spraying bands is less than one-half.

[0022] In step S4, the spraying is carried out in a fan-shaped spraying method. The spray gun is perpendicular to the wall surface, maintaining a distance of 30-50cm, and moves at a uniform speed of 0.8-1.2m / s. The thickness of a single wet film is controlled at 2-2.5mm.

[0023] In step S4, during the spraying process, an online wet film thickness detection device is used for real-time monitoring, and the thickness data is fed back to the control system. When the monitored thickness deviates from the preset range of 2-2.5mm, the control system automatically adjusts the spray gun moving speed or the material output flow rate to restore the wet film thickness to the set range.

[0024] In step S5, the anchoring stage is 0-3 minutes after spraying, and a physical method is used to intervene on the surface of the initial solidified coating. The intervention method is to spray decorative colored sand or use an embossing roller to process the surface texture.

[0025] In the shaping stage of step S5, when the ambient light intensity is continuously below 200 Lux, an ultraviolet auxiliary light source is activated to supplement the irradiation of the coating surface. The wavelength of the ultraviolet auxiliary light source is 320-390 nm, the irradiation intensity is 30-50 mW / cm², and the irradiation time is 20-40 minutes.

[0026] The quality inspection in step S6 includes coating appearance inspection and thickness detection, with a thickness ≥1.8mm and a deviation ≤±0.2mm, and an adhesion ≥2.0MPa. Example 1

[0027] Construction of exterior walls of new residential buildings First, the wall surface is washed with a high-pressure water gun to remove dust. Then, a special spraying equipment is started, and the compressed air on the equipment is heated to 45°C and dehumidified. The worker holds the spray gun and moves it at a constant speed about 40 cm away from the wall. The two components of the material, A and B, are mixed and sprayed onto the wall. One spray produces a wet film thickness of about 2.2 mm, and the film immediately loses its fluidity. About one hour after spraying, the surface can be touched. About two minutes after spraying, while the coating is not completely dry, the worker evenly sprinkles light gray quartz sand on the surface to form a textured finish. After 24 hours, the coating thickness is checked and found to be 2.1 mm on average, and uniform throughout. Example 2

[0028] Renovation of old tiled walls, requiring waterproofing and finishing to be done directly without removing the old tiles. First, the smooth surface of the tile is roughened with a sander. Then, it is sprayed according to standard procedures to form a beige waterproof coating about 2 mm thick. During the "window period" of about 90 seconds after spraying, the worker uses a rubber roller with a wood grain effect to gently roll on the coating to imprint a clear wood grain texture. This texture is integrated with the coating and cured. This process solves the problems of base treatment, waterproof layer construction and decorative surface layer production in one go, shortening the construction period by more than 60%. Example 3

[0029] Moisture-proofing construction of underground parking garage walls (comparison with existing technologies) Construction was carried out on a concrete wall in a basement. The environment was humid and there were visible water stains in some areas. Traditional waterproofing techniques could not be applied under these conditions. Construction details of this process: For obvious wet stains, first use a hot air gun to dry until there are no water marks on the surface. Set the compressed air temperature of the equipment to 48℃, and then spray to form a 2.2 mm thick coating. Since there is no natural light in the basement, immediately after spraying, use a mobile ultraviolet lamp to irradiate the coating surface for 30 minutes to assist in curing. After the final film is formed, the coating is dry, uniform, and without any blistering or peeling. Compared with traditional polyester spraying processes, this integrated spraying process shows significant advantages in terms of substrate adaptability, construction efficiency, and overall cost. Specifically, this process has more lenient requirements for the dryness of the substrate, allowing construction on slightly damp substrates with a moisture content of less than 8%, requiring only localized treatment. In contrast, the traditional polyester process requires the substrate to be completely dry (moisture content ≤ 5%), otherwise it is very easy for it to blister and fall off. Regarding the construction environment, this process can adapt to high humidity environments through equipment adjustment, while traditional processes are prone to problems such as whitening and stickiness when the humidity is higher than 75%. In terms of construction efficiency, this process can achieve a film layer of the designed thickness with a single spray and without sagging, which is highly efficient. In contrast, traditional processes usually require multiple thin sprays to prevent sagging, which is less efficient.

[0030] While embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A process for integrated spraying and film formation of a waterproof wall layer, characterized in that, Includes the following steps: S1. Base treatment: Remove floating dust, oil stains and loose particles from the wall surface to ensure a solid base; S2. Material preparation: Prepare two-component spraying materials A and B. Component A contains alkoxysilane modified resin and nano-catalyst, and component B contains photocurable resin and microcapsule curing agent. S3. Equipment debugging: Start the spraying equipment, preheat and dehumidify the compressed air, connect the material supply pipeline to the static mixing spray gun, and adjust the spraying pressure. S4. Spraying operation: Mix components A and B in the spray gun and spray them onto the wall to form a single wet film. S5, Stepped curing film formation: The coating sequentially goes through the anchoring stage, the shaping stage and the strengthening stage; S6. Quality Inspection: After curing, check the continuity and thickness of the coating.

2. The integrated spraying and film-forming process for waterproof wall layer according to claim 1, characterized in that: In the base treatment of step S1, for local damp areas with a moisture content higher than 8% but lower than 12%, a hot air gun is used for local auxiliary drying treatment to reduce the moisture content of the area to below 8% before the spraying operation of S4 is carried out.

3. The integrated spraying and film-forming process for waterproof wall layer according to claim 1, characterized in that: In step S3, the compressed air is preheated to 40-50°C and dehumidified to a dew point below -10°C. The preheating temperature and the dew point after dehumidification are controlled by the built-in sensors and control module of the equipment.

4. The integrated spraying and film-forming process for waterproof wall layer according to claim 1, characterized in that: In step S4, a segmented continuous spraying method is adopted, which divides the construction wall into multiple work sections and sprays continuously within a single work section. The connection time between sections is controlled within 3 minutes. The spray gun movement path is horizontal reciprocating, and the overlap of adjacent spraying bands is less than one-half.

5. The integrated spraying and film-forming process for waterproof wall layer according to claim 1, characterized in that: The spraying in step S4 adopts a fan-shaped spraying method. The spray gun is perpendicular to the wall surface, maintaining a distance of 30-50cm, and moves at a uniform speed of 0.8-1.2m / s. The thickness of a single wet film is controlled at 2-2.5mm.

6. The integrated spraying and film-forming process for waterproof wall layer according to claim 5, characterized in that: During the spraying process in step S4, an online wet film thickness detection device is used for real-time monitoring, and the thickness data is fed back to the control system. When the monitored thickness deviates from the preset range of 2-2.5mm, the control system automatically adjusts the spray gun moving speed or material output flow rate to restore the wet film thickness to the set range.

7. The integrated spraying and film-forming process for waterproof wall layer according to claim 1, characterized in that: The anchoring stage of step S5 is 0-3 minutes after spraying, and physical methods are used to intervene on the surface of the initial solidified coating. The intervention methods are to spray decorative colored sand or use embossing rollers to process the surface texture.

8. The integrated spraying and film-forming process for waterproof wall layer according to claim 7, characterized in that: In the shaping stage of step S5, when the ambient light intensity is consistently below 200 Lux, an ultraviolet auxiliary light source is activated to supplement the irradiation of the coating surface. The wavelength of the ultraviolet auxiliary light source is 320-390 nm, the irradiation intensity is 30-50 mW / cm², and the irradiation time is 20-40 minutes.

9. The integrated spraying and film-forming process for waterproof wall layer according to claim 1, characterized in that: The quality inspection in step S6 includes coating appearance inspection and thickness detection. The thickness is ≥1.8mm and the deviation is ≤±0.2mm, and the adhesion is ≥2.0MPa.