Tunnel fireproof coating is mainly composed of four materials: adhesive, fire-resistant filler, foaming material and additives, which not only has good mechanization function and function of resistance to expansion and contraction change, but also has excellent waterproof and mildew resistance.
1. tunnel fireproof coating construction what new technology in the tunnel before painting fireproof material to prepare a special mortar mixer, special spraying equipment and cleaning appliances and transportation tools.
2, the grass-roots level to deal with the surface of the tunnel first dust, oil, etc. clean while sprinkling wet, there are uneven places to be repaired.
3、Grass-roots construction
(1) water and paint to (0.70 ~ 0.75): 1 ratio of mixed with a mixer for 20min into a thick slurry;
(2) As a reference for spraying construction, a small amount of slurry can be used to make horizontal stripes with a spacing of 2.5m to mark the thickness;
(3) Use sprayer to spray from the waist to the top of the tunnel (from the bottom to the top), each time the thickness of spraying 3 ~ 8㎜;
(4) When the spraying is basically dry, continue spraying for the second time, and repeat the above program until spraying to the design thickness;
(5) Because of the spraying surface is not smooth enough, so after the end of the spraying should be handmade immediately to make up the level;
(6) After the completion of the grass-roots level, make sure the surface of the coating is smooth and clean.
