CN115352137B - Fireproof assembly for steel structure, and preparation process and application thereof - Google Patents
Fireproof assembly for steel structure, and preparation process and application thereof Download PDFInfo
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- CN115352137B CN115352137B CN202211008176.2A CN202211008176A CN115352137B CN 115352137 B CN115352137 B CN 115352137B CN 202211008176 A CN202211008176 A CN 202211008176A CN 115352137 B CN115352137 B CN 115352137B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 118
- 239000010959 steel Substances 0.000 title claims abstract description 118
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 93
- 239000011819 refractory material Substances 0.000 claims abstract description 36
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 35
- 239000002994 raw material Substances 0.000 claims abstract description 33
- 239000011230 binding agent Substances 0.000 claims abstract description 30
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 150000003839 salts Chemical class 0.000 claims abstract description 13
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims abstract description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 150000007524 organic acids Chemical class 0.000 claims abstract description 9
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003245 coal Substances 0.000 claims abstract description 6
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 6
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 38
- 238000005336 cracking Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 16
- 238000011049 filling Methods 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 10
- 239000000314 lubricant Substances 0.000 claims description 10
- 229920002748 Basalt fiber Polymers 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 238000007493 shaping process Methods 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 239000000378 calcium silicate Substances 0.000 claims description 8
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 8
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 8
- 229910052588 hydroxylapatite Inorganic materials 0.000 claims description 8
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- OUPZKGBUJRBPGC-UHFFFAOYSA-N 1,3,5-tris(oxiran-2-ylmethyl)-1,3,5-triazinane-2,4,6-trione Chemical compound O=C1N(CC2OC2)C(=O)N(CC2OC2)C(=O)N1CC1CO1 OUPZKGBUJRBPGC-UHFFFAOYSA-N 0.000 claims description 5
- 229960002413 ferric citrate Drugs 0.000 claims description 5
- 239000010881 fly ash Substances 0.000 claims description 5
- NPFOYSMITVOQOS-UHFFFAOYSA-K iron(III) citrate Chemical compound [Fe+3].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NPFOYSMITVOQOS-UHFFFAOYSA-K 0.000 claims description 5
- SFOKDWPZOYRZFF-UHFFFAOYSA-H 2,3-dihydroxybutanedioate;iron(3+) Chemical compound [Fe+3].[Fe+3].[O-]C(=O)C(O)C(O)C([O-])=O.[O-]C(=O)C(O)C(O)C([O-])=O.[O-]C(=O)C(O)C(O)C([O-])=O SFOKDWPZOYRZFF-UHFFFAOYSA-H 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000011490 mineral wool Substances 0.000 claims description 4
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 34
- 238000004519 manufacturing process Methods 0.000 description 19
- 239000011248 coating agent Substances 0.000 description 13
- 238000000576 coating method Methods 0.000 description 13
- 238000009413 insulation Methods 0.000 description 11
- 239000011159 matrix material Substances 0.000 description 11
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 9
- 239000003063 flame retardant Substances 0.000 description 9
- 235000019353 potassium silicate Nutrition 0.000 description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- MDXRFOWKIZPNTA-UHFFFAOYSA-L butanedioate;iron(2+) Chemical compound [Fe+2].[O-]C(=O)CCC([O-])=O MDXRFOWKIZPNTA-UHFFFAOYSA-L 0.000 description 6
- 239000003365 glass fiber Substances 0.000 description 6
- 238000010030 laminating Methods 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 238000009941 weaving Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000009970 fire resistant effect Effects 0.000 description 3
- 239000003469 silicate cement Substances 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 239000010963 304 stainless steel Substances 0.000 description 2
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical class [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 2
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000005007 epoxy-phenolic resin Substances 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- BPLYVSYSBPLDOA-GYOJGHLZSA-N n-[(2r,3r)-1,3-dihydroxyoctadecan-2-yl]tetracosanamide Chemical group CCCCCCCCCCCCCCCCCCCCCCCC(=O)N[C@H](CO)[C@H](O)CCCCCCCCCCCCCCC BPLYVSYSBPLDOA-GYOJGHLZSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- LBZRRXXISSKCHV-UHFFFAOYSA-N [B].[O] Chemical group [B].[O] LBZRRXXISSKCHV-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/047—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of fibres or filaments
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K21/00—Fireproofing materials
- C09K21/02—Inorganic materials
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/94—Protection against other undesired influences or dangers against fire
- E04B1/941—Building elements specially adapted therefor
- E04B1/942—Building elements specially adapted therefor slab-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Building Environments (AREA)
Abstract
The application relates to the technical field of steel structure fireproof, and particularly discloses a fireproof assembly for a steel structure, a preparation process and application thereof. A fireproof assembly for a steel structure comprises a fireproof layer; the fireproof layer is mainly prepared from the following raw materials in parts by weight: 50-80 parts of fiber, 0-200 parts of refractory material, 0-35 parts of anticracking agent, 30-50 parts of binder and 20-35 parts of water; the refractory material is at least one of bauxite, mullite, magnesia, alumina and coal gangue; the anticracking agent consists of diboron trioxide, aluminum phosphate and ferric salt of organic acid in the molar ratio of 38-50 to 12-18 to 20-25. The fireproof assembly for the steel structure can be used for steel structure building bodies, and has the advantage of good fireproof performance.
Description
Technical Field
The application relates to the technical field of steel structure fireproof, in particular to a fireproof assembly for a steel structure, and a preparation process and application thereof.
Background
Compared with the traditional concrete building, the steel structure building has higher strength and better shock resistance. And because the steel member can be manufactured in a factory and installed on site, the construction period can be greatly shortened. And because the steel member can be reused, the production of construction waste can be greatly reduced, and the steel member is more environment-friendly, so that the steel member is increasingly applied to industrial buildings and civil buildings.
In the construction process of the steel structure building, the fireproof performance needs to be considered besides parameters such as bearing performance, earthquake resistance performance and the like. The steel structure belongs to a nonflammable material, but has poor fire resistance, and the performance of the material is basically unchanged below 200 ℃, but the performance of the material begins to be obviously reduced after the temperature is over 200 ℃, and the steel structure loses the bearing capacity and is greatly deformed, bent and even collapsed after the temperature exceeds 450 ℃, so that huge casualties and property loss are caused.
The fire resistance limit of the steel frame which is not protected is only about 15min, so that the fire prevention treatment of the steel frame is particularly important. The Chinese patent application document with the application publication number of CN105712685A discloses a steel structure fireproof coating, which comprises the following raw materials in parts by weight: 325 cement 300-400, gypsum powder 100-150, bentonite 40-80, heavy calcium carbonate powder 100-150, high-temperature aluminum silicate fiber 30-50 and water 400-500, and is coated on the outer surface of a steel structure to play a corresponding role in fire prevention when in use.
Aiming at the steel structure fireproof paint, the raw materials contain more gypsum powder and heavy calcium carbonate, the components are easy to crack after long-time high-temperature flame roasting, and heat is easy to transfer inwards along cracks, so that the heat insulation performance is reduced.
Disclosure of Invention
In order to solve the problem that a fireproof material is easy to crack under a long-time high-temperature environment and the heat insulation effect is reduced, the application provides a fireproof assembly for a steel structure, and a preparation process and application thereof.
The first aspect fire prevention subassembly for steel construction, this application provides a fire prevention subassembly for steel construction, adopts following technical scheme:
a fireproof assembly for a steel structure comprises a fireproof layer; the fireproof layer is mainly prepared from the following raw materials in parts by weight:
and (3) fibers: 50-80 parts;
refractory material: 0-200 parts;
crack resistance agent: 0-35 parts;
and (2) a binder: 30-50 parts of a lubricant;
water: 20-35 parts of a lubricant;
the refractory material is at least one of bauxite, mullite, magnesia, alumina and coal gangue; the anticracking agent consists of diboron trioxide, aluminum phosphate and ferric salt of organic acid in the molar ratio of 38-50 to 12-18 to 20-25.
Further preferably, a fire protection assembly for a steel structure includes an outer layer, a fire protection layer and an inner layer laminated and fixed together in sequence; the fireproof layer is mainly prepared from the following raw materials in parts by weight:
and (3) fibers: 50-80 parts;
refractory material: 100-200 parts of a lubricant;
crack resistance agent: 20-35 parts of a lubricant;
and (2) a binder: 30-50 parts of a lubricant;
water: 20-35 parts of a lubricant;
the refractory material is at least one of bauxite, mullite, magnesia, alumina and coal gangue; the anticracking agent consists of diboron trioxide, aluminum phosphate and ferric salt of organic acid in the molar ratio of 38-50 to 12-18 to 20-25.
Through adopting above-mentioned technical scheme, adopt skin, flame retardant coating and inlayer range upon range of setting, at the initial stage of crossing the fire, the skin can be regarded as the heat reflection layer and reflect most heat radiation to still can guarantee certain basic reflection capability after crossing the fire for a long time. The inner layer can separate heat from transmitting to the steel structure and can play a good supporting role, so that the binding force between the fireproof assembly and the steel structure mounting matrix is better. And moreover, the fireproof layer is used as a filling layer, bauxite, mullite, magnesium oxide, aluminum oxide and coal gangue in the fireproof material have very low heat conductivity and higher fireproof performance, so that most heat can be isolated, and heat transfer to the inner layer is reduced. In addition, when heat is transmitted to the fireproof layer through the outer layer, the fireproof material can bear a very strong roasting effect, at the moment, the diboron trioxide molecules in the anticracking agent can be converted into an angular oxygen-boron structure under the high temperature effect, the boron trioxide molecules have very strong polarity and can be dispersed in the fireproof material to play a very good bonding role, meanwhile, the organic ferric salt is decomposed and oxidized under the high temperature condition and the promotion effect of the diboron trioxide, and is combined with aluminum phosphate to form an expanded iron-aluminum complex compound, a cellular and spongy micro-pore structure is formed in the fireproof layer, and the heat insulation performance of the fireproof layer is greatly improved. In addition, the pore structures can timely disperse shrinkage stress generated during roasting of the refractory material, reduce the probability of shrinkage cracks of the fireproof layer, enable the fireproof layer to resist long-time high-temperature roasting without cracking, and have longer refractory time and better heat insulation effect.
Preferably, the organic acid ferric salt is at least one of ferric tartrate, ferric phthalate and ferric citrate.
By adopting the technical scheme, the variety composition of the organic acid ferric salt is optimized and adjusted, the ferric tartrate, the ferric phthalate and the ferric citrate have higher reactivity, the generation rate of the iron-aluminum complex compound is adjusted, the form of the micro-pore structure in the fireproof layer is improved, and the structural stability of the fireproof layer is improved so as to reduce the occurrence of cracking.
Preferably, the fiber is one or more of basalt fiber, glass fiber, high silica fiber, rock wool fiber, calcium silicate fiber and ceramic fiber.
Through adopting above-mentioned technical scheme, test and screening fibrous type and ratio, basalt fiber, glass fiber, high silica fiber, rock wool fiber, calcium silicate fiber, ceramic fiber have better fire resistance and mechanical properties, and the dispersion is inlayed and is established in the fire prevention layer, plays the skeleton supporting effect, can disperse shrinkage stress when receiving the high temperature roast, further promotes the anti cracking performance of flame retardant coating.
Preferably, the fiber consists of basalt fiber, high silica fiber and calcium silicate fiber in the mass ratio of (15-20) (2-3.5) (5-9).
By adopting the technical scheme, the variety ratio of the fibers is further optimized and adjusted, the strength and toughness of the fiber skeleton network are balanced, and the high-temperature cracking resistance of the fireproof layer is improved.
Preferably, the mass ratio of the refractory material to the cracking resistance agent is (5-6.25): 1.
By adopting the technical scheme, the proportion of the refractory material to the anti-cracking agent is tested and adjusted, the refractory heat-insulating property and the mechanical property of the fireproof layer are integrated, cracking is not easy to occur, and a better heat-insulating effect can be maintained for a long time.
Preferably, the binder consists of cement, fly ash and triglycidyl isocyanurate (3-5 wt.%) in (0.5-1 wt.%) in (1.2-1.8 wt.%).
By adopting the technical scheme, the composition ratio of the binder is optimized and adjusted, and cement, fly ash and triglycidyl isocyanurate are selected to bond raw materials such as refractory materials, so that the problem of poor thermal shock property of the refractory materials under the high-temperature condition is solved.
Preferably, the raw materials of the fireproof layer also comprise 5-7 parts by weight of hydroxyapatite.
By adopting the technical scheme, the hydroxyapatite can play a role in assisting hardening, reduce shrinkage and cracking, promote agglomeration and combination among the micro powder particle raw materials such as refractory materials, cracking resistance agents and the like, further improve the state of the microstructure of the fireproof layer, and improve the fireproof performance and high-temperature stability of the fireproof layer.
In a second aspect, the present application provides a process for preparing a fireproof assembly for a steel structure, which adopts the following technical scheme: a preparation process of a fireproof assembly for a steel structure comprises the following steps:
s1: preparing a plurality of fiber webs from fibers, and uniformly mixing a formula amount of refractory material, an anticracking agent, a binder and water to obtain an intermediate material;
s2: and stacking the fiber webs, uniformly filling the intermediate material between each fiber web, and then pressurizing, shaping and drying to obtain the fireproof layer.
Further preferably, a process for preparing a fireproof assembly for a steel structure comprises the following steps:
s1: preparing a plurality of fiber webs from fibers, and uniformly mixing a formula amount of refractory material, an anticracking agent, a binder and water to obtain an intermediate material;
s2: laminating the fiber webs, uniformly filling intermediate materials between each fiber web, and then pressurizing, shaping and drying to obtain a fireproof layer;
s3: and sequentially laminating and fixing the outer layer, the fireproof layer and the inner layer.
Further preferably, a process for preparing a fireproof assembly for a steel structure comprises the following steps:
s1: preparing a plurality of fiber webs from fibers, and uniformly mixing a formula amount of refractory material, an anticracking agent, a binder and water to obtain an intermediate material;
s2: and stacking the fiber webs, uniformly filling the intermediate material between each fiber web, and then pressurizing, shaping and drying to obtain the fireproof layer.
Through adopting above-mentioned technical scheme, the outer isolated flame of initial stage of crossing the fire, reflection most heat radiation, the flame retardant coating plays fine isolated effect in the middle and late stages of crossing the fire to each component raw materials in the flame retardant coating has formed micro-pore structure under high temperature environment, has stable thermal-insulated effect for a long time, is difficult for taking place shrink fracture simultaneously, and holistic fire behavior is better.
Preferably, in the step S1, the step of adding hydroxyapatite is further included in the process of uniformly mixing the refractory material, the anticracking agent, the binder and the water according to the formula amount.
In a third aspect, the present application provides an application of a fireproof assembly for a steel structure, which adopts the following technical scheme: I. fixing the fireproof assembly on the surface of a steel structure substrate;
II. And filling gaps between plates of adjacent fireproof assemblies by adopting fireproof glue.
In summary, the present application has the following beneficial effects:
1. because this application adopts skin, flame retardant coating and inlayer composite usage, can carry out the protection of pertinence according to the different stages of crossing the fire, utilize the flame retardant coating to carry out fine isolation to the heat at the microporosity structure that forms under the high temperature, flame retardant coating structure is difficult for shrink fracture, can keep stable, effectual guard action for a long time.
2. In the application, the composite fireproof coating is preferably compounded by adopting various fibers, refractory materials, anti-cracking agents and binders, and the stability of the fireproof layer under the high-temperature condition is further improved by utilizing the skeleton supporting effect of a fiber network, so that the shrinkage cracking condition is reduced.
3. The fireproof assembly for the steel structure, which is prepared by the preparation process, can be fixed on a steel structure building matrix, can play a good role in fireproof protection, can be suitable for various civil buildings, industrial buildings, underground buildings and the like, and has a wide application range. The fireproof assembly has low production cost, can be produced in a large scale and has high comprehensive economic benefit.
Detailed Description
The present application is described in further detail below with reference to examples.
The raw materials of the examples and comparative examples herein are commercially available in general unless otherwise specified.
The dimensions of the fire protection assembly in this embodiment may be adjusted as required, and preferably, the dimensions of the fire protection assembly in this embodiment are 1.22m×2.44m.
Examples
Example 1
The fireproof assembly for the steel structure of the embodiment comprises an outer layer, a fireproof layer and an inner layer, wherein the layers are sequentially laminated and bonded together, and the total thickness is 10mm.
Wherein the outer layer is a reflecting layer with the thickness of 1mm and is made of aluminum-nickel alloy. The inner layer is a cement plate with the thickness of 3mm.
The fireproof layer of the embodiment is made of the following raw materials by weight: 50kg of fiber, 100kg of refractory material, 20kg of cracking resistance agent, 30kg of binder and 20kg of water.
The fiber is basalt fiber. The refractory material consists of alumina and bauxite according to the mass ratio of 3:1. The binder is ordinary silicate cement, and the reference number is 42.5. The anticracking agent consists of diboron trioxide, aluminum phosphate and iron succinate in the molar ratio of 38 to 12 to 20.
The preparation method of the fireproof assembly for the steel structure of the embodiment comprises the following steps:
s1: weaving and cutting fibers according to the size of a steel structure matrix to form a plurality of fiber nets with corresponding specifications, wherein the fiber nets are of rectangular three-dimensional net structures, and uniformly mixing the refractory materials, the anticracking agent, the binder and the water according to the formula amount in a stirrer at the stirring speed of 300rpm to obtain an intermediate material;
s2: taking one fiber net as a substrate, uniformly paving a layer of intermediate material with the thickness of 1mm on the substrate, paving a layer of fiber net, and repeating the operation to sequentially stack the fiber net and the intermediate material layer by layer to prepare a blank body, ensuring that the intermediate material between the fiber nets is uniformly filled, putting the blank body under a hot press for pressurization and shaping, wherein the hot press temperature is 120 ℃, and finally, further drying in the room temperature environment to prepare a fireproof layer, wherein the thickness of the fireproof layer is 7mm;
s3: uniformly coating water glass fireproof glue on the surfaces of the outer layer, the fireproof layer and the inner layer, and sequentially laminating, bonding and fixing the surfaces.
The application of the fireproof assembly for the steel structure of the embodiment comprises the following steps:
I. the fireproof assembly is fixed on the surface of the steel structure matrix by a buckle, so that the inner layer is tightly attached to the surface of the steel structure; II. And filling gaps between plates of adjacent fireproof assemblies by using water glass fireproof glue.
Example 2
The fireproof assembly for the steel structure of the embodiment comprises an outer layer, a fireproof layer and an inner layer, wherein the layers are sequentially laminated and bonded together, and the total thickness is 25mm.
Wherein the outer layer is a reflecting layer with the thickness of 2mm and is made of 304 stainless steel material. The inner layer is a glass fiber board with the thickness of 3mm.
The fireproof layer of the embodiment is made of the following raw materials by weight: 80kg of fiber, 200kg of refractory material, 35kg of cracking resistance agent, 50kg of binder and 35kg of water.
The fiber is rock wool fiber. The refractory material is bauxite. The binder is epoxy phenolic resin. The anticracking agent consists of diboron trioxide, aluminum phosphate and iron succinate in the molar ratio of 38 to 12 to 20.
The preparation method of the fireproof assembly for the steel structure of the embodiment comprises the following steps:
s1: weaving and cutting fibers according to the size of a steel structure matrix to form a plurality of fiber nets with corresponding specifications, wherein the fiber nets are of rectangular three-dimensional net structures, and uniformly mixing the refractory materials, the anticracking agent, the binder and the water according to the formula amount in a stirrer at the stirring speed of 200rpm to obtain an intermediate material;
s2: taking one fiber net as a substrate, uniformly paving a layer of intermediate material with the thickness of 2mm on the substrate, paving a layer of fiber net, and repeating the operation to sequentially stack the fiber net and the intermediate material layer by layer to prepare a blank body, ensuring that the intermediate material between the fiber nets is uniformly filled, putting the blank body under a hot press for pressurization and shaping, wherein the hot press temperature is 150 ℃, and finally, further drying in the room temperature environment to prepare a fireproof layer, wherein the thickness of the fireproof layer is 20mm;
s3: uniformly coating water glass fireproof glue on the surfaces of the outer layer, the fireproof layer and the inner layer, and sequentially laminating, bonding and fixing the surfaces.
The application of the fireproof assembly for the steel structure of the embodiment comprises the following steps:
I. the fireproof assembly is fixed on the surface of the steel structure matrix by bolts, so that the inner layer is tightly attached to the surface of the steel structure;
II. And filling gaps between plates of adjacent fireproof assemblies by using water glass fireproof glue.
Example 3
The fireproof assembly for the steel structure of the embodiment comprises an outer layer, a fireproof layer and an inner layer, wherein the layers are sequentially laminated and bonded together, and the total thickness is 20mm.
Wherein the outer layer is a reflecting layer with the thickness of 1.5mm and is made of 304 stainless steel material. The inner layer is a glass fiber board with the thickness of 4mm.
The fireproof layer of the embodiment is made of the following raw materials by weight: 80kg of fiber, 200kg of refractory material, 32kg of cracking resistance agent, 50kg of binder and 30kg of water.
The fiber is glass fiber. The refractory material consists of magnesium oxide, mullite and coal gangue according to the mass ratio of 2:0.5:1. The binder is epoxy phenolic resin. The anticracking agent consists of diboron trioxide, aluminum phosphate and iron succinate in the molar ratio of 38 to 12 to 20.
The preparation method of the fireproof assembly for the steel structure of the embodiment comprises the following steps:
s1: weaving and cutting fibers according to the size of a steel structure matrix to form a plurality of fiber nets with corresponding specifications, wherein the fiber nets are of rectangular three-dimensional net structures, and uniformly mixing the refractory materials, the anticracking agent, the binder and the water according to the formula amount in a stirrer at the stirring speed of 280rpm to obtain an intermediate material;
s2: taking one fiber net as a substrate, uniformly paving a layer of intermediate material with the thickness of 1.5mm on the substrate, paving a layer of fiber net, and repeating the operation to sequentially stack the fiber net and the intermediate material layer by layer to prepare a blank, ensuring that the intermediate material between the fiber nets is uniformly filled, putting the blank under a hot press for pressurization and shaping, and finally, further drying at the hot press temperature of 135 ℃ in a room temperature environment to prepare a fireproof layer, wherein the thickness of the fireproof layer is 15mm;
s3: uniformly coating water glass fireproof glue on the surfaces of the outer layer, the fireproof layer and the inner layer, and sequentially laminating, bonding and fixing the surfaces.
The application of the fireproof assembly for the steel structure of the embodiment comprises the following steps:
I. the fireproof assembly is fixed on the surface of the steel structure matrix by bolts, so that the inner layer is tightly attached to the surface of the steel structure;
II. And filling gaps between plates of adjacent fireproof assemblies by using water glass fireproof glue.
Example 4
The fireproof assembly for a steel structure of this embodiment is different from that of embodiment 3 in that: the raw materials of the fireproof layer comprise boron trioxide, aluminum phosphate and iron succinate in a molar ratio of 50:18:25, and the rest is the same as in the example 3.
The process for manufacturing the fireproof assembly for a steel structure of this example is the same as that of example 3.
The application of the fireproof assembly for a steel structure of this embodiment is the same as that of embodiment 3.
Example 5
The fireproof assembly for a steel structure of this embodiment is different from that of embodiment 4 in that: the raw material of the fireproof layer was ferric tartrate, and the rest was the same as in example 4.
The process for manufacturing the fireproof assembly for a steel structure of this example is the same as that of example 4.
The application of the fireproof assembly for a steel structure of this embodiment is the same as that of embodiment 4.
Example 6
The fireproof assembly for a steel structure of this embodiment is different from that of embodiment 4 in that: the raw material of the fireproof layer was ferric citrate as the organic ferric salt, and the rest was the same as in example 4.
The process for manufacturing the fireproof assembly for a steel structure of this example is the same as that of example 4.
The application of the fireproof assembly for a steel structure of this embodiment is the same as that of embodiment 4.
Example 7
The fireproof assembly for a steel structure of this embodiment is different from that of embodiment 4 in that: the raw materials of the fireproof layer comprise ferric salt of organic acid and ferric salt of ferric phthalate and ferric citrate according to the mol ratio of 0.35:1, and the rest is the same as in the example 4.
The process for manufacturing the fireproof assembly for a steel structure of this example is the same as that of example 4.
The application of the fireproof assembly for a steel structure of this embodiment is the same as that of embodiment 4.
Example 8
The fireproof assembly for a steel structure of this embodiment is different from that of embodiment 7 in that: the raw materials of the fireproof layer comprise high silica fiber, ceramic fiber and calcium silicate according to the mass ratio of 3:2:5, and the rest is the same as in the example 7.
The process for manufacturing the fireproof assembly for a steel structure of this example is the same as that of example 7.
The application of the fireproof assembly for a steel structure of this embodiment is the same as that of embodiment 7.
Example 9
The fireproof assembly for a steel structure of this embodiment is different from that of embodiment 7 in that: the raw materials of the fireproof layer comprise basalt fibers, high silica fibers and calcium silicate fibers according to a mass ratio of 15:2:5, and the rest are the same as in the embodiment 7.
The process for manufacturing the fireproof assembly for a steel structure of this example is the same as that of example 7.
The application of the fireproof assembly for a steel structure of this embodiment is the same as that of embodiment 7.
Example 10
The fireproof assembly for a steel structure of this embodiment is different from that of embodiment 7 in that: the raw materials of the fireproof layer comprise basalt fibers, high silica fibers and calcium silicate fibers according to a mass ratio of 20:3.5:9, and the rest are the same as in the example 7.
The process for manufacturing the fireproof assembly for a steel structure of this example is the same as that of example 7.
The application of the fireproof assembly for a steel structure of this embodiment is the same as that of embodiment 7.
Example 11
The fireproof assembly for a steel structure of this embodiment is different from that of embodiment 9 in that: the raw materials of the fireproof layer comprise cement, fly ash and triglycidyl isocyanurate in a mass ratio of 3:0.5:1.2, and the rest is the same as in example 9.
The process for manufacturing the fireproof assembly for a steel structure of this example is the same as that of example 9.
The application of the fireproof assembly for a steel structure of this embodiment is the same as that of embodiment 9.
Example 12
The fireproof assembly for a steel structure of this embodiment is different from that of embodiment 9 in that: the raw materials of the fireproof layer comprise cement, fly ash and triglycidyl isocyanurate in a mass ratio of 5:1:1.8, and the rest is the same as in example 9.
The process for manufacturing the fireproof assembly for a steel structure of this example is the same as that of example 9.
The application of the fireproof assembly for a steel structure of this embodiment is the same as that of embodiment 9.
Example 13
The fireproof assembly for a steel structure of this embodiment is different from embodiment 12 in that: the raw material of the fireproof layer also included 6.2kg of hydroxyapatite, and the rest was the same as in example 12.
The manufacturing process of the fireproof assembly for a steel structure of this embodiment is different from that of embodiment 12 in that: in the step S1, the formula amount of refractory material, anticracking agent, binder, hydroxyapatite and water are uniformly mixed in a stirrer at a stirring speed of 280rpm to obtain an intermediate material.
The fireproof assembly for a steel structure of this embodiment is applied in the same manner as in embodiment 12.
Example 14
The fireproof assembly for the steel structure of the embodiment comprises a fireproof layer, wherein the thickness of the fireproof layer is 10mm.
The fireproof layer of the embodiment is made of the following raw materials by weight: 50kg of fiber, 30kg of binder and 20kg of water.
The fiber is glass fiber. The binder is ordinary silicate cement, and the reference number is 42.5.
The preparation method of the fireproof assembly for the steel structure of the embodiment comprises the following steps:
s1: weaving and cutting fibers according to the size of a steel structure matrix to form a plurality of fiber nets with corresponding specifications, wherein the fiber nets are of rectangular three-dimensional net structures, and uniformly mixing the adhesive and water with the formula amount in a stirrer at the stirring speed of 300rpm to obtain an intermediate material;
s2: one of the fiber webs is taken as a substrate, a layer of intermediate material with the thickness of 1mm is uniformly paved on the substrate, then a layer of fiber web is paved, then the operation is repeated, the fiber web and the intermediate material are sequentially overlapped layer by layer to prepare a green body, the uniform filling of the intermediate material between the fiber webs is ensured, then the green body is placed under a hot press for pressurization and shaping, the hot press temperature is 120 ℃, and finally, the fire-resistant layer is prepared after further drying in the room temperature environment, wherein the thickness of the fire-resistant layer is 10mm.
The application of the fireproof assembly for the steel structure of the embodiment comprises the following steps:
I. the fireproof assembly is fixed on the surface of the steel structure matrix by a buckle, so that the fireproof layer is tightly attached to the surface of the steel structure;
II. And filling gaps between plates of adjacent fireproof assemblies by using water glass fireproof glue.
Comparative example
Comparative example 1
The fireproof assembly for the steel structure of the comparative example comprises an outer layer, a fireproof layer and an inner layer, wherein the layers are sequentially laminated and bonded together, and the total thickness is 10mm.
Wherein the outer layer is a reflecting layer with the thickness of 1mm and is made of aluminum-nickel alloy. The inner layer is a cement plate with the thickness of 3mm.
The fireproof layer of the comparative example is made of the following raw materials by weight: 50kg of fiber, 120kg of refractory material, 30kg of binder and 20kg of water.
The fiber is basalt fiber. The refractory material consists of alumina and bauxite according to the mass ratio of 3:1. The binder is ordinary silicate cement, and the reference number is 42.5.
The preparation method of the fireproof assembly for the steel structure of the comparative example comprises the following steps:
s1: weaving and cutting fibers according to the size of a steel structure matrix to form a plurality of fiber nets with corresponding specifications, wherein each fiber net is of a rectangular three-dimensional net structure, and uniformly mixing the refractory materials, the binder and the water according to the formula amount in a stirrer at the stirring speed of 300rpm to obtain an intermediate material;
s2: taking one fiber net as a substrate, uniformly paving a layer of intermediate material with the thickness of 1mm on the substrate, paving a layer of fiber net, and repeating the operation to sequentially layer by layer the fiber net and the intermediate material to prepare a blank, ensuring that the intermediate material between the fiber nets is uniformly paved, putting the blank under a hot press for pressurization and shaping, and finally, further drying at the hot press temperature of 120 ℃ in a room temperature environment to prepare a fireproof layer, wherein the thickness of the fireproof layer is 7mm;
s3: uniformly coating water glass fireproof glue on the surfaces of the outer layer, the fireproof layer and the inner layer, and sequentially laminating, bonding and fixing the surfaces.
The application of the fire-proof assembly for steel structure of this comparative example is the same as that of example 1.
Comparative example 2
The fireproof assembly for steel structure of this comparative example is different from example 1 in that: the raw materials of the fireproof layer comprise diboron trioxide and aluminum phosphate according to a molar ratio of 50:18, and the rest is the same as in the example 1.
The process for manufacturing the fireproof assembly for steel structure of this comparative example is the same as in example 1.
The application of the fire-proof assembly for steel structure of this comparative example is the same as that of example 1.
Comparative example 3
The fireproof assembly for steel structure of this comparative example is different from example 1 in that: the raw material of the fireproof layer is iron succinate as the anticracking agent, and the rest is the same as in the embodiment 1.
The process for manufacturing the fireproof assembly for steel structure of this comparative example is the same as in example 1.
The application of the fire-proof assembly for steel structure of this comparative example is the same as that of example 1.
Comparative example 4
The fireproof assembly for steel structure of this comparative example is different from example 1 in that: the raw material of the fireproof layer is sodium aluminum sulfate as the anticracking agent, and the rest is the same as in the example 1.
The process for manufacturing the fireproof assembly for steel structure of this comparative example is the same as in example 1.
The application of the fire-proof assembly for steel structure of this comparative example is the same as that of example 1.
Comparative example 5
The fireproof assembly for steel structure of this comparative example is different from example 1 in that: the raw materials of the fireproof layer comprise boron trioxide, aluminum phosphate and iron succinate in a molar ratio of 18:20:35, and the rest is the same as in the example 1.
The process for manufacturing the fireproof assembly for steel structure of this comparative example is the same as in example 1.
The application of the fire-proof assembly for steel structure of this comparative example is the same as that of example 1.
Performance test
Detection method
The fireproof assemblies for steel structures of examples 1 to 13 and comparative examples 1 to 5 were tested for fireproof performance according to the national standard GB/T14007-2018, and the test results are shown in Table 1.
Test pieces of 500mm by 500mm specifications were prepared by taking the fireproof layers of examples 1 to 13 and comparative examples 1 to 5, and after 1 hour of overfire, the surface cracking condition was observed, and the number of cracks on the surface of the test pieces was recorded, and the test results are shown in Table 1.
Test pieces with the specification of 500mm multiplied by 500mm are prepared from the fireproof layers of examples 1-13 and comparative examples 1-5, and the formula theta= (To-T)/To multiplied by 100 percent is adopted, wherein theta is the attenuation of the heat insulation efficiency, and the unit is; to is the reference insulation efficiency in min; t is the heat insulation efficiency after 1h of fire, the unit is min, and the test results are shown in Table 1.
TABLE 1 data for Performance test of fire protection assemblies for Steel structures of examples 1-13 and comparative examples 1-5
As can be seen from analysis of examples 1 to 3, example 4 and comparative examples 1 to 4 in combination with table 1, the composition ratio of the raw materials in the flame retardant layer was tested for the influence on the flame resistance of the flame retardant layer, and the composition of the cracking resistance agent was optimized and adjusted, it can be seen that the cracking resistance of comparative example 1 was severely reduced without adding the cracking resistance agent, the number of cracks was increased by about 4.9 times, and the thermal insulation efficiency attenuation was also improved from 31.6% to 57.8%. In addition, it can be seen that the amount of cracks of comparative example 3, in which only the organic acid ferric salt was added, was reduced by 32 pieces compared with that of comparative example 2, in which only the diboron trioxide and aluminum phosphate were added, and the heat insulation efficiency was reduced by about 16%. Analysis of example 4 and comparative example 4 shows a reduction in the number of cracks in example 4 of about 26.8% compared to conventional sodium aluminum sulfate cracking inhibitors.
As can be seen from the analysis of examples 5 to 7 and comparative example 5 in combination with Table 1, the composition ratio of the organic acid ferric salt was further optimized and adjusted to improve the micro-pore structure state in the fireproof layer, and the number of cracks in example 7 was reduced by about 20% compared with that in comparative example 5.
As can be seen from the analysis of examples 8 to 10, examples 11 to 12 and example 13 in combination with table 1, the optimization and adjustment of the composition ratio of the fibers and the composition ratio of the binder further improved the fire resistance and crack resistance of the fire-resistant layer, and the thermal insulation attenuation of example 12 was reduced by about 15.3% as compared with example 7. And after the hydroxyapatite is added, the interface bonding state and the pore structure state between the particle raw materials such as refractory materials, cracking resistance agents and the like are improved, the number of cracks is reduced by 4 pieces compared with that of the embodiment 12, and the attenuation of the heat insulation efficiency is reduced by about 9.7 percent.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (8)
1. A fire protection assembly for a steel structure, comprising a fire protection layer; the fireproof layer is mainly prepared from the following raw materials in parts by weight: and (3) fibers: 50-80 parts; refractory material: 100-200 parts of a lubricant; crack resistance agent: 20-35 parts of a lubricant; and (2) a binder: 30-50 parts of a lubricant; water: 20-35 parts of a lubricant;
the refractory material is at least one of bauxite, mullite, magnesia, alumina and coal gangue; the anticracking agent consists of diboron trioxide, aluminum phosphate and ferric salt of organic acid in the molar ratio of 38-50 to 12-18 to 20-25; the organic ferric salt is at least one of ferric tartrate, ferric phthalate and ferric citrate;
the fireproof assembly is prepared by the following method:
s1: preparing a plurality of fiber webs from fibers, and uniformly mixing a formula amount of refractory material, an anticracking agent, a binder and water to obtain an intermediate material;
s2: and stacking the fiber webs, uniformly filling the intermediate material between each fiber web, and then pressurizing, shaping and drying to obtain the fireproof layer.
2. A fire protection assembly for steel structures according to claim 1, wherein the fibres are one or more of basalt fibres, silica fibres, rock wool fibres, calcium silicate fibres, ceramic fibres.
3. A fire protection assembly for steel structures according to claim 2, wherein the fibers consist of basalt fibers, high silica fibers and calcium silicate fibers in a mass ratio of (15-20): (2-3.5): (5-9).
4. A fire protection assembly for steel structures according to claim 1, wherein the mass ratio of the refractory material to the cracking resistance agent is (5-6.25): 1.
5. The fireproof assembly for steel structures according to claim 1, wherein the binder consists of cement, fly ash and triglycidyl isocyanurate in a mass ratio of (3-5): (0.5-1): (1.2-1.8).
6. The fireproof assembly for steel structures according to claim 1, wherein the raw materials of the fireproof layer further comprise 5-7 parts by weight of hydroxyapatite.
7. The fire-proof assembly for steel structure according to claim 1, wherein the step S1 further comprises the step of adding hydroxyapatite in the process of uniformly mixing the formula amount of refractory material, cracking resistance agent, binder and water.
8. An application of a fireproof assembly for a steel structure, comprising the following steps:
I. securing the fire protection assembly of any one of claims 1-7 to a steel structure substrate surface;
II. And filling gaps between plates of adjacent fireproof assemblies by adopting fireproof glue.
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