Coating technology: construction method of tunnel fire retardant coating

Core tip: the construction of tunnel fire retardant coating generally adopts layered and interval construction technology, which is divided into base layer (fireproof layer) and surface layer (color layer) construction During the construction period and within 24 hours after the construction, the ambient temperature shall not be lower than 4 ℃ to prevent frostbite In extremely dry and hot conditions, necessary curing conditions shall be created to prevent the coating from losing water too fast 1 Construction machines and tools: mortar mixer, special spraying equipment (squeeze mortar pump, air compressor), special iron plate for plastering, cleaning tools, transportation tools, etc 2 Construction preparation: (1) Clean the floating dust and oil on the concrete surface of the tunnel, 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 Coating home news: the construction of tunnel fire retardant coating generally adopts layered and interval construction technology, which is divided into base (fire layer) and surface (color layer) construction During the construction period and within 24 hours after the construction, the ambient temperature shall not be lower than 4 ℃ to prevent frostbite In extremely dry and hot conditions, necessary curing conditions shall be created to prevent the coating from losing water too fast 1 Construction machines and tools: mortar mixer, special spraying equipment (squeeze mortar pump, air compressor), special iron plate for plastering, cleaning tools, transportation tools, etc 2 Construction preparation: (1) clean the floating dust and oil on the concrete surface of the tunnel and spray water for wetting (2) Repair the uneven places to ensure the smoothness of the tunnel concrete surface At the same time, where the concrete surface is particularly smooth, mortar plastering is required (3) Where there is water leakage, make up for it 3 Base course construction: (1) water and paint shall be mixed in the proportion of (0.70-0.75): 1, and mixed with a mixer for 20min (make sure that the mixing time is ensured, and the paint shall be mixed and used at any time), forming a thick paste (2) A small amount of slurry is used as the horizontal strip thickness mark with a spacing of 2.5m, as the reference for spraying construction (3) the spraying machine is used to spray from the waist of the tunnel to the top (from the bottom to the top), and the thickness of each spraying is 3-8 (4) after the first spraying is basically dry, continue to spray for the second time, so cycle until the spraying reaches the design thickness (5) As the spraying surface is not smooth enough, after the last spraying, the slurry shall be used for manual filling, leveling and finishing immediately to make the coating surface flat and smooth and ensure that the coating reaches the design thickness (6) After the completion of the base course, the coating surface shall be flat, smooth and clean 4 Surface construction: the surface construction can only be carried out after the base course is basically dry and fully formed (for projects with higher requirements, such as municipal engineering, it is better to apply a layer of putty on the surface of the base course before the surface construction) The surface layer can be constructed with spray gun, wool brush, roller and other machines and tools, and the spraying shall be uniform, smooth and without color difference The boundaries of different colors shall be straight and clear 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,