Indoor non-expansive cement-based fireproof coating
Detailed Introduction
Specification Model: GT-NSF-Fp.t-NH206
Core Performance and Features
- Fire resistance and heat insulation: in case of fire, it relies on its own incombustibility and low thermal conductivity to form a heat insulation layer, effectively improving the fire resistance limit of the steel structure.
- Environmental protection and safety: It is usually water-based paint, which does not contain asbestos and organic solvents, and is less harmful to human body.
- The coating is stable: the coating is firmly bonded and has high strength, and is not easy to crack, hollow or fall off after drying and curing.
Construction method
- Before construction, the surface of the component shall be inspected and accepted. The surface shall be clean, dust-free and oil-free, and the anti-rust and anti-corrosion primer has been applied, and the primer paint surface has been dried. Epoxy zinc-rich primer has good compatibility. If the antirust primer is alkyd series, the fire retardant coating can be applied only after the compatibility test is qualified.
During the priming construction of the first layer of fireproof coating, the proportion of the ingredients is appropriate powder: rubber = 25:75, the priming material is mixed into paste, the roller coating or spray gun is used for galling, the coating is uniform without missing, and the next process is carried out after 48 hours of drying.
- After the first coating (about 48h at normal temperature without water), carry out the second coating. The proportion of the ingredients is powder: water: glue = 100:100 ~ 120:5. The mixture can be stirred evenly to facilitate the construction. Then spray the coating or apply the coating with a building plastering knife. The construction thickness is about 10-20mm. The plastering thickness can be increased appropriately, and the plastering surface shall be free of cracks.
Technical parameters
No. | Inspection items | Corresponding standard clause number | Standard requirements | Inspection results | Inspection conclusion |
1. | Bond strength (MPa) | GB14907-2018 | ≥0.04 | 0.12 | Qualified |
2. | Water resistance | GB14907-2018 | After 24h test, the coating shall be free of peeling, foaming and falling off, and the attenuation of thermal insulation efficiency shall be ≤ 35%. | After 24 hours of test, the coating has no peeling, foaming and falling off, and the attenuation of thermal insulation efficiency is 17%. | Qualified |
3. | Resistance to cold and hot cycles | GB14907-2018 | After 15 tests, the coating shall be free of cracking, peeling and blistering, and the attenuation of thermal insulation efficiency shall be ≤ 35%. | After 15 times of tests, the coating has no cracking, peeling and blistering, and the attenuation of thermal insulation efficiency is 15%. | Qualified |
4. | Fire resistance（Fp3.00） | GB14907-2018 | Fire resistance time ≥ 3.00h; the maximum bending deformation of the test piece does not exceed the specification limit; Average temperature of test piece ≤ 538 ℃ | The measured coating thickness is 32mm, the fire resistance test time is 3.00h, and the maximum bending deformation of the test piece is 32.45mm; Average temperature of test piece 519.63 ℃ | Qualified |
Keywords
Paint
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