Common knowledge of coating: several precautions for construction quality assurance of architectural coating

Core tip: the reason why architectural coatings are applied in all kinds of buildings is that they are simple in construction, rich and soft in color, smooth and clear in line, can create multiple texture effects, and are easy to maintain and update However, if the operation is improper, the product performance is not well understood or the base treatment is not good in the construction, the coating quality and exterior wall appearance will be affected In order to ensure the quality of exterior wall coating finish, the following work must be done during construction: 1、 Strictly control the quality of coating products Understand the design and construction intention and other design documents, understand the use function, and preferentially select the products that have passed the quality certification or green environmental protection products Prevent the use of fake Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Home of coatings: the reason why architectural coatings are applied in all kinds of buildings is that they are simple in construction, rich and soft in color, smooth and clear in line, can create multiple texture effects, and are easy to maintain and update However, if the operation is improper, the product performance is not well understood or the base treatment is not good in the construction, the coating quality and exterior wall appearance will be affected In order to ensure the quality of exterior wall coating finish, the following work must be done during construction: 1 Strictly control the quality of coating products, understand the design and construction intention and other design documents, make clear the use function, and preferentially select the products that have passed the quality certification or green environmental protection products To prevent the use of fake and inferior products, the incoming materials shall be sampled to check whether their varieties and colors meet the design and construction requirements, and the product performance test report and product qualification certificate shall be provided The incoming materials shall be classified, stacked and marked, and shall be in the charge of a specially assigned person A material mobilization acceptance system shall be established to ensure the quality of materials 2、 The key to the construction quality of the base lies in the strength, flatness and cleanliness of the base First of all, the moisture content of the base is an important indicator of the strength of the base Different types of coatings have different requirements on the moisture content of the base Due to the poor permeability and hydrophobicity of the solvent coating film, for example, it is easy to peel and fall off when it is applied on the wet base surface When applying solvent coating, the moisture content of the base course shall not be greater than 8%; when applying water-based coating, the moisture content of the base course shall not be greater than 10% Therefore, the control requirement of the moisture content of the base course is the key to ensure the adhesion between the coating and the base course, and the base course does not appear peeling, hollowing, cracking and other phenomena It is forbidden to ignore the strength of the base course due to the schedule Secondly, the flatness of the coated surface is poor If there are obvious joints or the surface roughness is different, the uneven absorption of the coating after spraying, rolling and brushing will cause uneven color of the external wall, which is easy to form a "flower face" Moreover, the surface of the base course is uneven, resulting in uneven thickness of putty, uneven drying and wetting, and easy to form local cracking and peeling Finally, the base pollution, such as floating ash, soil, film remover, oil and other attachments, will also cause peeling, peeling, discoloration and other phenomena due to poor adhesion between the film and the base, so the base surface must be clean 3、 To master the temperature and humidity correctly, all kinds of coatings need to form continuous film under certain temperature conditions Therefore, the coating products have higher requirements on the construction environment, and the appropriate temperature is conducive to the drying and film-forming of the coating If the ambient temperature is too low or too high during the construction, the technical index of the coating will be reduced, resulting in poor film-forming of the coating, so that the surface can not be uniform, resulting in film cracking, pulverization, falling off in water, seriously affecting the appearance of the building and the service life of the external facing Therefore, the minimum allowable construction temperature and humidity of the coating should be strictly controlled The construction environment of the coating project should be between 5 ° C and 35 ° C with good ventilation, which can not only accelerate the conjunctival process, but also benefit the health of the operators With the development of new products, the types of coatings are also increasing, especially for the technical standards and use functions of new products, the construction should be carried out correctly according to the requirements of the operation manual, and it is not allowed to act on the basis of experience In addition, the coating film formation is not completed in an instant, there is a process in the process, so it is required not only to meet the minimum construction temperature requirements during construction, but also to meet the temperature requirements within a period of time after construction In case of abnormal conditions due to climate change, corresponding protective measures shall be taken to ensure the quality of coating 4、 Strictly standardize the construction operation procedures First, the construction personnel must do a good job of preparation before construction: select the type and color of paint according to the design and construction requirements In order to avoid color difference, we should prepare enough materials, mix them and mix them evenly according to the use requirements, so as to ensure the technical indexes are consistent and stable Second, pay attention to the role of anti alkali sealing primer: sealing the alkaline role of the external wall; improving the adhesion between the surface coating and the wall; enhancing the covering power of the surface coating to prevent the surface coating from blooming; saving the surface coating Therefore, before painting, the exterior wall must undergo a reasonable curing period and be treated with a sealing primer 5、 It is difficult to control the appropriate consistency, too much water and reduce the gloss, covering power and durability of the coating Therefore, it is necessary to mix the coating thoroughly and evenly before use, organize construction according to the requirements of the instruction manual, do disclosure work well, do not mix water or color at will, and use it up within the specified time, otherwise it will reduce its technical index and affect its application quality At present, there are many kinds of coatings with different application scope and conditions It is the common coating, but also has the difference between inside and outside Therefore, the construction personnel must carefully study the material standard, have the common sense of building materials, fully understand the application scope and use performance of the coating, and never be careless and use the wrong coating After exposure to the sun and rain, unexpected quality problems appear in a short period of time, and we can't make up coatings by ourselves at will and without science, causing economic losses and trouble of rework In a word, the construction personnel shall operate in strict accordance with the specifications and carry out the work with tags The quality of exterior wall coating can be guaranteed only by adhering to the guiding principle of model wall, doing well in all aspects of operation technology, controlling appropriate consistency and mastering the disclosure of application scope Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,