Fireproof coating fireproof coating construction price
(1) Process flow
Steel structure base treatment _ + spray fireproof coating primer. WBM-04 fireproof coating thick coating, stirring - + layered smear thick
Type fireproof coating _+ spray coating fireproof coating
(2) Steel Base Treatment
1 Thoroughly remove dust, floating rust, and oil on the surface of steel structures, and brush and anti-rust paint should be applied twice to the parts that are damaged or brushed. The cracks in the joints of the steel structure are filled with fire-proof paint and do not leave any defects so as to avoid becoming a weak link in the fire and ensure the fire-resistance limit of the steel structure. 2 Clean the operation site before spraying. For equipment, pipes, etc. that do not need to be sprayed, cover with a plastic sheet to prevent contamination.
(3) Spray fireproof coating primer
1WGNH-03 thick fireproof coating primer consists of a single component, using a self-weight paint gun with a nozzle diameter of 6 ~ 8mm, spray gun should be perpendicular to the surface of the steel member, the distance to 30 ~ 50em is appropriate, the air pump pressure to O.4 ~ 0.6MP. 2 The spraying thickness is 0.3-0.5mm, and the surface should be formed with irregular coating with uneven thickness and uneven thickness. After drying, the next step construction can be performed.
(4) WGNH-03 indoor thick fireproof coating ingredients, stirring
1WGNH-03 thick steel structure fire retardant coating consists of two components, which needs to be prepared on site and the proportion of component A is prepared.
(dry material): B component (slurry): water = 4:1:1 (weight ratio). 2 by the use of a mixer in the scene to measure stirring, stirring
When the mixture is mixed, the dry material is poured into the mixer and the water is mixed and mixed for 2 minutes, then the liquid material is stirred for 5 minutes, so that the coating is uniform and the consistency is appropriate.
No drooling or falling phenomenon after painting.
(5) Layered fireproof coating:
1 Apply fire-retardant coating layer by layer. The thickness of each layer is controlled at about 4 to 6mm. After the primer is dry, the next layer can be applied until it reaches the desired thickness. The dry time of the paint on each occasion depends on the specific circumstances, generally around 10 to 24 hours. According to the specific circumstances, generally about 10 to 24h. 2 The fire retardant coating should be used immediately. The prepared fire retardant coating must be used within 60m-in. During construction, it is necessary to keep the parts uniform and consistent, and no leakage or uneven thickness shall be allowed.
(6) Spray coating fireproof coating
1 The last coat of paint is applied by spraying. The spray gun should be perpendicular to the surface of the steel component when spraying, and the distance is 40~60cm.
Appropriately, the gun diameter is 12 ~ 14mm, the air pressure should be maintained at 0.4 ~ 0.6M pao2 When spraying the holding nozzle should be stable, to rotate the spray back and forth, pay attention to the overlap at the same color, uniform thickness, to prevent leakage, flow, Make sure the coating is completely closed and the contours are clear. After spraying, self-inspection is performed. If the thickness is not enough, then spray it again.
Fire coating thickness detection
(1) Detection method
A stylus (thickness measuring instrument) consisting of a needle bar and a slideable disc 32 that is always held perpendicular to the needle bar and mounted on it
Composition, the disc is always kept perpendicular to the needle bar, and fixed devices are installed on it. The diameter of the disc is not more than 30mra to ensure complete
Touch the surface of the part under test. If the thickness gauge is not easily inserted into the inserted material, other suitable methods may also be used for testing. Measurement
During the test, vertically insert the thickness probe into the fireproof coating up to the surface of the steel substrate and record the scale reading (see Figure 1).
(2) Selection of measuring points
1 The thickness of the fire-retardant coating of beams and columns of steel structures shall be measured at intervals of 3m within the length of the component, as shown in Figure 2.
test.
2 Truss structure, take a cross-section detection every 3m for the upper and lower chords, and take one cross-section for each other.
3 For beams and columns in the selected position, measure 6 and 8 points respectively. Calculate their average value separately, fine
True to 0.5mm.
4 Construction Precautions
1 The product is packaged in a clean, dry, sealed container. The site should be dry, ventilated, moisture-proof, and protected from sunlight.
Exposure to radiation, rain exposure, storage temperature 5 ~ 35 ~ C, after opening, there should be no crust, agglomeration, gel and other phenomena. More than effective storage
Should be retested. 2 The derusting and rust-preventing primer coating on the steel surface before the application of the fireproof coating shall meet the design requirements and regulations of the relevant national standards.
set. The primer coating shall not rust steel materials and cannot react with the anticorrosive paint. It can be firmly bonded to steel components and coatings. 3 The ambient temperature during painting should be between 5 and 38°C, the relative humidity should not be more than 90%, the surface temperature of the steel plate should be above 3°C above the dew point, and air should be circulated. When the ambient humidity exceeds the specified or the ambient temperature is low, once the surface of the steel plate has moisture, water stains, condensation phenomenon, the coating area should be dried, heat preservation treatment, gently wipe with a dry clean cotton absorbent cloth, and air a section After time, paint again. 4 During the spraying process, make necessary shielding to avoid cross-contamination. If any pollution occurs, clean it up promptly. Coated semi-finished products should be covered and protected against contamination by other dirty liquids or rain. The strength of the fireproof coating after hardening is still not high, and the easily collided parts in the construction should be temporarily protected to prevent the coating from peeling off during the construction process. 5 The paint is too thick, and the rebound loss during spraying is large. If it is too thin, it is easy to flow and fall. Therefore, the fire retardant coating should be mixed well and its consistency should be suitable before use. 6 The bond strength and compressive strength of fire-retardant coatings for steel structures are to comply with the requirements of CECS24:90, the current national standard for technical application of fire-retardant coatings for steel structures. The strength of each type of coated fire-retardant coating of 500t or less than 500t shall be examined at one time. And compressive strength. 7 Thickness of thick coating type fire retardant coating, 80% or more of the area should meet the design requirements, and the thinnest thickness should not be less than 85% of the design requirements, in 5m length of the coating thickness is less than the design requirements of the length is not greater than Lm. 8 The surface crack width of the thick coating type fireproof coating shall not be greater than 1mm, and shall not exceed 3 in width. 9 Fireproof paint should not be miscoated or leaked, and the coating should be closed
5 Quality Commonalities Control Measures
1 empty drum: First of all, the ratio should be strictly controlled, the basic treatment is the key to clean, and pay attention to batch sampling raw material bond strength.
Examine the empty drum with a 0.5 kg hammer and find that empty drums should be re-smeared. 2 Cracks: The ambient temperature and humidity should be suitable. The time of ventilation and drying during layered coating should be well mastered. 3 uneven thickness and thickness is not enough: spray nozzle angle should be perpendicular to the component surface, the distance is appropriate, each layer should be sprayed with a certain time interval, not too tight with. The operator should carry the thickness measurement needle to check the thickness of the spray until it reaches the required thickness. 4 Pulverization, delamination, shedding, laitance: The on-site deployment of paints should be appropriate, strictly in accordance with the process, and always monitor the environmental climate. Coatings that do not meet the requirements must be scraped off and repainted. 5 Joints, corners, and other details of processing rough: to fill gaps in the joints of flat steel structure, enhance the sense of quality of construction workers, and carefully spray detail.
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In recent years, a large number of home renovations use combustible materials such as wood and fabrics, so the importance of fire prevention is becoming increasingly prominent. Brushing fire-retardant paint or fire-retardant paint on flammable materials is one of the most important modern fire protection methods. Is waterproof paint equivalent to fireproof material? Is there any difference between fireproof paint and fireproof paint? Xiao Bian will explain below for you.
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