With the development of modern buildings to high-rise and complex, fire safety has become a link that cannot be ignored. Among them,Thick fire retardant coatingsIt has been widely used because of its excellent fire performance and durability. This article will introduce the spraying application method of thick fire retardant coating in detail to help you understand how to carry out the coating application correctly and effectively. Fire retardant coatings
1. Preparation before construction.
Before starting construction, you need to make thorough preparations. First of all, to:Thoroughly remove dust, floating rust and oil stains on the surface of the steel structureto make sure the surface is clean. For bumps or missing brush parts, should:Brush the anti-rust paint twiceto ensure the adhesion and anti-rust effect of the coating. Second, prepare all the construction equipment and materials, including:Mixers, sprayers and thick fire-retardant coatingsWait.
Second, the application of interface agent.
In order to enhance the adhesion and fire performance of the coating, an interface agent is applied before spraying the fire retardant coating. After the operation site is cleaned, the equipment, pipes, etc. that do not need to be sprayedCover protectionto prevent contamination. Then follow the instructions for use of the interface agent and adoptSpray or roller coatingto be applied.
3. Coating preparation and mixing.
Thick fire retardant coatings are generally made of:Two-component composition (component A is dry powder, component B is glue)., which needs to be formulated on-site. Adjust the proportion of A and B components according to the number of construction times, first add water to the mixer, then add glue and stir evenly, gradually add dry powder, and stir into a thick slurry. The mixing time is strictly controlled, and the prepared paint should be used up within a certain time.
Fourth, spraying construction.
After sufficient preparations, the spraying application can be carried out. First of all, add water in the mixer in proportion, then add glue and stir evenly, then gradually add dry powder and stir into a thick slurry. Strictly control the stirring timeThe prepared paint should be used up within a certain period of time. Then, use a small amount of slurry to make a spacing of 2 before applicationThe thickness of the horizontal bar of 5 m is used as a reference for spraying construction. Next, use a spraying machine to spray, the thickness of the first hanging slurry is controlled within a certain range as much as possible, and the second time can be applied after the surface is dry, and then each time is controlled within a certain range, and so on until the spraying reaches the design thickness.
5. Construction control and maintenance.
In the construction process, it is necessary to control the paintConsistency, spray distance and angleand other parameters to ensure that the coating surface is flat. For the case that the slurry is too dry during mixing, the water-cement ratio can be appropriately increased, and the suitable construction shall prevail. In the process of mixing, spraying, and smearing, the slurry scattered and ** can be recovered in time, and the contaminated and more than a certain period of time can no longer be used with paint, once the packaging bag is opened, it should be used immediately, and the paint that is damp and agglomerated shall not be used. After application, it needs to be cured for a period of time to enhance the adhesion and performance of the coating.
6. Safety and environmental protection management.
In the process of spraying thick fire-retardant coatingsSafety and environmental managementCrucial. Workers should wear protective equipment to avoid contact with paint or inhalation of paint dust. At the same time, the construction site should be well ventilated to prevent solvent volatilization and fire hazards. For the paint that falls to the ground, it should be cleaned up and collected in time and disposed of reasonably, so as to avoid pollution to the environment.
7. Quality inspection and acceptance.
After the completion of the application, the coating needs to be carried outQuality inspectionto ensure that it meets design requirements and quality standards. The test content includes coating thickness, appearance quality, bond strength and other indicators, and if there is a problem, measures should be taken in time to remedy or rework. Finally, when carrying out acceptance, it should be ensured that the coating surface is smooth and smooth, free of bubbles, cracks and other phenomena, and can only be put into use after acceptance in accordance with relevant specifications and standards.
To sum up, the thick fireproof coating spraying construction method needs to follow certain steps and precautions, from the preparation before construction to the quality control and maintenance of the construction process, as well as safety and environmental protection management, there are certain requirements and quality standards, which need to be carefully implemented to ensure that the fireproof coating plays its due role and effect, and protects the safety of people's lives and property.