Steel structure is in normally 450 ～ can lose carrying capacity in 650 ℃ temperature, produce very big deformation, bring about steel column, girder to bend, because the result crosses big deformation and cannot continue to use, do not add the fireproof limit of protective steel structure to be 15 minutes or so commonly. This for a short while accident still is concerned with the speed of component part absorption of heat.
1. is ultrathin model structural fire retardant coating
Fire retardant coating of ultrathin shape structure is to show coating ply 3 Mm(contains 3 Mm) less than, adornment effect is better, can expand when high temperature epispastic, fireproof limit is in commonly the steel structure fire retardant coating of 2 H less than. Fire retardant coating of this kinds of steel structure is solvent system commonly, have superior cohere strength, be able to bear or endure Hou Naishui sex it is good, good to shed smooth sex, adornment sex is good wait for a characteristic; Slow when getting internal heat expand epispastic form compact and hard fire prevention thermal insulation, layer of this fire prevention has very strong fireproof concussion sex, delayed the temperature rise of rolled steel, protect steel member effectively. Ultrathin expand construction of shape structure fire retardant coating can use spray, brush Tu Huo roller to besmear, use commonly ask to be on the building steel structure of 2 H less than in fireproof limit. The new breed of fire retardant coating of ultrathin shape structure that already appeared to fireproof function is achieved or exceed 2 H, it basically is with special structure get together candle of methylic acrylic ester or epoxy resin and amino colophony, chloric fossil answer deserve to regard as base makings adhesive, add get together with tall degree of polymerization ammonium phosphate, double Ji Wu 4 alcohol, 3 get together cyanogen amine for fire prevention flame retardant system, add grey stone of titanium white pink, silicon to wait for inorganic and fireproof material, it is solvent with 200# solvent naphtha compound and into. Use this type fire retardant coating all sorts of light steel structure, net wearing to undertake fire prevention is protected more. Because coating of this kinds of fire retardant coating is ultrathin, make use amount larger model, fire retardant coating of thin shape structure decreases greatly, reduced project total cost thereby, make steel structure got effective fire prevention is protected again, fire prevention effect is very good.
Fire retardant coating of structure of 2. thin shape
Fire retardant coating of scumble shape structure is to show coating ply is more than 3mm, be less than be equal to 7 Mm, have certain adornment effect, expand when high temperature add thick, fireproof limit is in the steel structure fire retardant coating of 2 H less than. Fire retardant coating of this kind of steel structure is to use polymer of appropriate ability in swimming to make commonly base makings, match again with fire retardant the composition such as additive of complex system, fire prevention, fireproof fiber, principle of its fire prevention is the same as ultrathin model. To this kind of fire retardant coating, the polymer of ability in swimming that the requirement chooses has to steel base material good adherent strength, wear and be able to bear or endure ability in swimming. Excel of its adornment sex is thick model fire retardant coating, fire retardant coating of structure of thin shape of inferior Yu Chao, general and fireproof limit is in 2 H less than. Because this is commonly used,be in be less than 2 H in the project of protection of steel structure fire prevention of fireproof limit, often use spray construction. Very large proportion is had in a period, but as fire retardant coating of ultrathin shape structure appear, its market share is replaced gradually.
Fire retardant coating of structure of 3. large section
Fire retardant coating of large section structure is to show coating ply is more than 7 Mm, be less than be equal to 45 Mm, show graininess side, density is lesser, thermal conductance is low, fireproof limit is in the steel structure fire retardant coating of 2 H above. As a result of thick model the composition of fire retardant coating is inorganic material more, accordingly its prevent igneous function to stabilize, it is better to use the effect for a long time, but the grain of its coating constituent is bigger, coating surface is rough whole, influence architectural whole is beautiful, because this is used at structural take cover engineering mostly. This kinds of fire retardant coating uses data in fire graininess surface, density is lesser, thermal conductance low or the sex of absorption of heat of the material in coating, delayed the temperature rise of rolled steel, protect rolled steel. This kind of fire retardant coating is to use appropriate inorganic cementation to expect (the) such as if collosol of water glass, silicon, phosphoric acid is aluminous salt, fireproof cement, deserve to pledge gently with inorganic again adiabatic aggregate material (if expand pearlite, expand vermiculite, Hai Baoshi, float bead, fly ash) , fire prevention additive, chemical drug and enhance material (wait like fiber of cotton of siliceous aluminous fiber, cliff, pottery and porcelain, fibre glass) reach filling, have the advantage with inferior cost. Construction often uses spray, apply to fireproof limit to ask the room inside and outside in 2 H above concealments steel structure, high level whole steel structure and multilayer workshop steel structure. Be like: The high level is civil the fireproof limit of architectural column, general industry and the column with the multilayer bearing in civil building all should achieve 3 H, need to use this thick model protection of fire retardant coating.
4. mineral cotton kind coating of heat insolation of building fire prevention
Mineral cotton kind coating of heat insolation of building fire prevention is afterwards thick Tu Xingjian builds fire retardant coating, pearlite series, the series of another important fire retardant coating after fire retardant coating of series of chloric oxygen magnesian cement, still belong to short board, it and pearlite kind photograph of fire retardant coating is compared, its are main the characteristic is the mineral fibre that serves as adiabatic filling can rise to enhance action to coating intensity, the structure that the area that applicable sends more at the earthquake or Chang Shouzhen change, can have fire prevention, adiabatic, sound-absorbing effect. Mineral cotton kind coating of heat insolation of building fire prevention basically has coating of heat insolation of mineral fibre fire prevention, adiabatic filling, its bases is material of mineral cotton, felt it is cement commonly, construction of dry method spray is used in the spot, high-pressured air is used together with felt material after fiber classics is dispersive namely carry be in to spout, next with distributing to mix eject to come at the tall pulverization water all round spout the surface that wait for besmear. Can obtain the coating with lesser density, can reduce the weight of whole structure thereby, drop building negative charge. Abroad is used extensively already wash-and-wear model mineral cotton kind fire retardant coating, when the construction site that needs in execution condition is used, have construction convenient, cost is low, dry the advantage such as time weak point. Zhengzhou flourish Cheng Naicai holds to: Protect quality, heavy credit, user consummate. Scientific administrative constitution, abundant technology force, perfect detect the safeguard that method, advanced tooling, stable product quality is high quality service. Genuine hope and you enter Zhengzhou flourish Cheng Naicai in all hand in hand, win-win of sincere letter collaboration, mutual benefit. Faculty of Zhengzhou flourish Cheng Naicai will serve for you wholeheartedly!
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