CN115286352B - Magnesium oxysulfate fireproof plate for tunnel and preparation method thereof - Google Patents
Magnesium oxysulfate fireproof plate for tunnel and preparation method thereof Download PDFInfo
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- CN115286352B CN115286352B CN202111053602.XA CN202111053602A CN115286352B CN 115286352 B CN115286352 B CN 115286352B CN 202111053602 A CN202111053602 A CN 202111053602A CN 115286352 B CN115286352 B CN 115286352B
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- protein foaming
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- 238000002360 preparation method Methods 0.000 title abstract description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title abstract description 6
- 239000011777 magnesium Substances 0.000 title abstract description 6
- 229910052749 magnesium Inorganic materials 0.000 title abstract description 6
- CENHPXAQKISCGD-UHFFFAOYSA-N trioxathietane 4,4-dioxide Chemical compound O=S1(=O)OOO1 CENHPXAQKISCGD-UHFFFAOYSA-N 0.000 title abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 51
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims abstract description 44
- 239000004088 foaming agent Substances 0.000 claims abstract description 39
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 30
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 22
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 22
- 239000003607 modifier Substances 0.000 claims abstract description 15
- 108090000623 proteins and genes Proteins 0.000 claims abstract description 15
- 102000004169 proteins and genes Human genes 0.000 claims abstract description 15
- 239000000945 filler Substances 0.000 claims abstract description 14
- OLZDXDPSDUSGIS-UHFFFAOYSA-N sulfinylmagnesium Chemical compound [Mg].S=O OLZDXDPSDUSGIS-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012779 reinforcing material Substances 0.000 claims abstract description 11
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 30
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 22
- 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 claims description 19
- 229920000742 Cotton Polymers 0.000 claims description 16
- 239000011324 bead Substances 0.000 claims description 15
- 238000007667 floating Methods 0.000 claims description 15
- 235000018102 proteins Nutrition 0.000 claims description 14
- 235000021120 animal protein Nutrition 0.000 claims description 12
- 239000003365 glass fiber Substances 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 11
- 239000004743 Polypropylene Substances 0.000 claims description 10
- 229940103272 aluminum potassium sulfate Drugs 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 10
- 229910000403 monosodium phosphate Inorganic materials 0.000 claims description 10
- 235000019799 monosodium phosphate Nutrition 0.000 claims description 10
- -1 polypropylene Polymers 0.000 claims description 10
- 229920001155 polypropylene Polymers 0.000 claims description 10
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 claims description 10
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 108010064851 Plant Proteins Proteins 0.000 claims description 7
- 235000021118 plant-derived protein Nutrition 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 3
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000003063 flame retardant Substances 0.000 claims 4
- 238000000034 method Methods 0.000 claims 2
- 230000009970 fire resistant effect Effects 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 8
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 12
- 229910001629 magnesium chloride Inorganic materials 0.000 description 6
- 108010082495 Dietary Plant Proteins Proteins 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- XOCUXOWLYLLJLV-UHFFFAOYSA-N [O].[S] Chemical compound [O].[S] XOCUXOWLYLLJLV-UHFFFAOYSA-N 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000036632 reaction speed Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- GARPJQVATFLXFO-UHFFFAOYSA-L S(=O)(=O)([O-])[O-].[Mg+2].[O-2].[Mg+2] Chemical compound S(=O)(=O)([O-])[O-].[Mg+2].[O-2].[Mg+2] GARPJQVATFLXFO-UHFFFAOYSA-L 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 241000544076 Whipplea modesta Species 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229910003471 inorganic composite material Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000010451 perlite Substances 0.000 description 1
- 235000019362 perlite Nutrition 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 1
- 235000019801 trisodium phosphate Nutrition 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
Classifications
-
- 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
- C04B28/30—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 magnesium cements or similar cements
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/148—Aluminium-sulfate
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/16—Acids or salts thereof containing phosphorus in the anion, e.g. phosphates
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/04—Carboxylic acids; Salts, anhydrides or esters thereof
- C04B24/06—Carboxylic acids; Salts, anhydrides or esters thereof containing hydroxy groups
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/0037—Materials containing oriented fillers or elements
- C04B2111/00379—Materials containing oriented fillers or elements the oriented elements being fibres
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- 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
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Building Environments (AREA)
Abstract
The invention relates to C04B 28/30, in particular to a magnesium oxysulfide fireproof plate for a tunnel and a preparation method thereof. Comprises the following raw materials, by weight, 20-45 parts of magnesia powder, 10-25 parts of magnesium sulfate powder, 20-40 parts of filler, 1.7-3.2 parts of reinforcing material, 0.1-0.4 part of protein foaming agent and 0.05-3.5 parts of modifier. The magnesium oxysulfate fireproof plate for the tunnel, which is prepared by the invention, has the advantages of good fireproof performance, high flexural strength, good impact resistance and good anti-reversion property.
Description
Technical Field
The invention relates to C04B 28/30, in particular to a magnesium oxysulfide fireproof plate for a tunnel and a preparation method thereof.
Background
The traditional fireproof plate generally selects magnesium chloride as a raw material, the preparation time is short, the quality cost can be effectively reduced, but the magnesium chloride has high reaction speed, free unreacted magnesium chloride ions can be remained, and when the fireproof plate is wet in weather, plum and rain seasons, the plate body is easy to get damp, and the service life is seriously influenced by the reduction of mechanical strength.
Patent CN201810127326.9 provides a sulfur-oxygen plate and its production method, which promotes the formation of integral network structure in the system by adding polymer into the sulfur-oxygen plate, and enhances the corrosion resistance of the sulfur-oxygen plate. However, the added polymer has the problems of high preparation cost, complex preparation process and the like, and severely limits the application.
The patent CN201010285941.6 provides a halogen-free environment-friendly magnesium oxide-magnesium sulfate non-combustible inorganic composite material, which is prepared from magnesium oxide and a magnesium sulfate solution with the mass concentration of 20-70%, and has the advantages of no moisture regain, stable combustion performance, long service life and the like.
Disclosure of Invention
In order to solve the technical problems, the first aspect of the invention provides a magnesium oxysulfide fire-proof plate for a tunnel, which comprises, by weight, 20-45 parts of magnesium oxide powder, 10-25 parts of magnesium sulfate powder, 20-40 parts of filler, 1.7-3.2 parts of reinforcing material, 0.1-0.4 part of protein foaming agent and 0.05-3.5 parts of modifier.Magnesia powder
Preferably, the average particle size of the magnesia powder is 180-250 meshes.
Preferably, the content of magnesium oxide in the magnesium oxide powder is more than or equal to 85 percent.
Preferably, the activity of the magnesia powder is more than or equal to 65 percent.
In order to further improve the mechanical properties of the fireproof plate, it is further preferable that the average particle size of the magnesium oxide powder is 200 meshes, and the content of magnesium oxide in the magnesium oxide powder is 90-95%. When the particle size of the magnesium oxide is smaller, the hydrolysis heat release speed is high, and the raw materials in the system are reacted after being not molded, so that the molding of the fireproof plate is not facilitated.
Magnesium sulfate
Preferably, the content of magnesium sulfate in the magnesium sulfate powder is more than or equal to 98 percent.
Packing material
Preferably, the filler comprises at least one of floating beads, vitrified microbeads, aluminum silicate cotton powder, expanded perlite and expanded vermiculite.
In order to further improve the flexural strength and the fire-preventing effect of the fire-preventing plate, it is further preferable that the filler includes floating beads and aluminum silicate cotton powder. The mass ratio of the floating beads to the aluminum silicate cotton powder is (2-4): (2-3). Under the condition, the floating beads are light in weight and hollow, so that the density of the fireproof plate can be reduced, and the fireproof plate has certain flexible deformation capability by combining the uniform gas-phase continuous structure formed by aluminum silicate cotton powder in the system, so that the flexural strength of the fireproof plate is enhanced, and the heat conductivity of the material is reduced.
In order to further improve the heat insulation effect of the fire-proof plate and reduce the weight of the fire-proof plate, it is preferable that the floating beads have an average particle diameter of 30-50 mesh.
Preferably, the specific gravity of the floating beads is 200-300 kg/m 3 . Because the reinforcing steel bars inside the tunnel structure can soften after 380 ℃, the strength is reduced, the stability of the tunnel cannot be maintained, and therefore, when the fireproof plate isolates a flame, the rapid heat transfer is further prevented, the density of the fireproof plate is kept in a certain state, the rapid heat conduction inside a system is prevented, the main body is prevented from being damaged, the temperature stability inside the tunnel can be maintained, and the fireproof heat insulation effect can be achieved when the flame is generated.
Preferably, the average particle size of the aluminum silicate cotton powder is 180-250 meshes.
Preferably, the aluminum silicate cotton powder contains 87-92% of aluminum silicate.
Reinforcing material
Preferably, the reinforcing material comprises fiberglass mesh and/or polypropylene fiber segment shreds.
Further preferably, the reinforcing material comprises fiberglass mesh and polypropylene fiber segment shreds. The mass ratio of the glass fiber mesh cloth to the polypropylene fiber section shreds is (1.5-2.5): (0.2-0.25).
Preferably, the mesh size of the glass fiber mesh cloth is 3-8 meshes
Preferably, the glass fiber mesh cloth has a weight per square gram of 120-130g.
Protein foaming agent
Preferably, the protein foaming agent comprises an animal protein foaming agent and/or a vegetable protein foaming agent.
Further preferably, the protein foaming agent comprises an animal protein foaming agent and a vegetable protein foaming agent. The mass ratio of the animal protein foaming agent to the vegetable protein foaming agent is (3-5): (3-5).
The plant protein foaming agent has low price, but the foaming performance is not ideal enough, and the foaming performance can be improved together with the animal protein foaming agent, but the impermeability of the obtained fireproof plate is not good because of the different factors such as the performance of the plant protein foaming agent and the animal protein foaming agent or the preparation of the fireproof plate material, the proportion of the plant protein foaming agent and the animal protein foaming agent is difficult to control. The research of the invention finds that when the mass ratio is (3-5): when the animal protein foaming agent and the plant protein foaming agent are applied to the system, more closed pores can be generated, the impermeability of the fireproof plate is enhanced, the heat transfer caused by air flow is low, the heat conductivity is reduced, and the heat insulation fireproof performance is improved.
Modifying agent
Preferably, the modifier comprises at least three of boric acid, citric acid, oxalic acid, aluminum potassium sulfate, phosphoric acid, trisodium phosphate, sodium sulfate, and sodium dihydrogen phosphate.
Further preferably, the modifier includes citric acid, sodium dihydrogen phosphate and aluminum potassium sulfate. The mass ratio of the citric acid, the sodium dihydrogen phosphate and the aluminum potassium sulfate is (5-8): (5-8): (1-3).
The fireproof plate is easy to cause the internal structure to be converted into a large number of loose structures when meeting water, a large number of gaps are generated, the water resistance and the solvent resistance are reduced, and the strength is reduced. According to the invention, unexpected researches show that the addition of citric acid, sodium dihydrogen phosphate and aluminum potassium sulfate modifier can inhibit the generation of an internal magnesium hydroxide phase, promote the formation of certain crystalline phases in a system, strengthen the mechanical properties of the fireproof plate and improve the solvent resistance of the fireproof plate.
Further preferably, the content of the modifier is 2.5 to 3.2 parts.
In a preferred embodiment, the mass ratio of the magnesium oxide powder to the magnesium sulfate powder is (5-8):
(3-4). According to the unexpected research, the invention discovers that the apparent density of the prepared fireproof plate is moderate by further limiting the proportion of magnesium oxide to magnesium sulfate, the main manufacturing cost of a foundation and a structure can be effectively reduced, and the heat conductivity coefficient is smaller. When the content of magnesium oxide is low, the formation of the reinforcing phase of the fireproof plate is slow, the fireproof plate is easy to deform, and the final mechanical property of the fireproof plate can be seriously affected.
The second aspect of the invention provides a preparation method of a magnesium oxysulfide fire-proof plate for a tunnel, which comprises the following steps: and (3) shredding and mixing the magnesia powder, the magnesium sulfate powder, the filler, the protein foaming agent, the modifier and the polypropylene fiber section uniformly, adding the obtained mixture into a mold, paving glass fiber mesh cloth, rolling, stacking, initial setting, demolding, carrying out secondary maintenance, drying and cutting to obtain the sulfur oxide fireproof plate.
Preferably, the reinforcement material is 1.5-2.5mm from the bottom surface.
The beneficial effects are that:
1) The common tunnel fireproof plate has the temperature resistance of about 1100 ℃, the fireproof plate prepared by further limiting the proportion of magnesium oxide to magnesium sulfate and selecting the filler and the foaming agent with specific parameters has the advantages of higher and uniform closed pore rate, uniform gas phase continuous structure formed inside, stable size, moderate density, heat resistance for two hours at 1350 ℃ and extremely excellent fireproof performance.
2) The traditional fireproof plate generally selects magnesium chloride as a raw material, the preparation time is short, the mass cost can be effectively reduced, but the magnesium chloride has high reaction speed, free unreacted magnesium chloride ions can be remained, and the plate body is easy to get damp when the fireproof plate is wet in weather, plum and rain seasons. According to the invention, magnesium sulfate is used as a raw material, the reaction speed is controlled, citric acid, sodium dihydrogen phosphate and aluminum potassium sulfate are used as modifying reagents to treat the fireproof plate, the formation of a strengthening phase in a system is promoted, the prepared fireproof plate has good impermeability, wet expansion rate is less than or equal to 0.5%, dry shrinkage is less than or equal to 0.2%, and the fireproof plate can maintain excellent performance in the southern plum rain season, especially when the air humidity is greater than 90%.
Detailed Description
Examples
Example 1
The magnesium oxysulfide fireproof plate for the tunnel comprises the following raw materials, by weight, 39.5 parts of magnesium oxide powder, 19.5 parts of magnesium sulfate powder, 35 parts of filler, 2.7 parts of reinforcing material, 0.3 part of protein foaming agent and 3 parts of modifier.
The average particle size of the magnesium oxide powder is 200 meshes. The content of magnesium oxide in the magnesium oxide powder is 92%. The activity of the magnesia powder is more than or equal to 65 percent, and the magnesia powder is purchased from the model of the modesty refractory material Co., ltd in sea city: QYCCM-92.
The content of magnesium sulfate in the magnesium sulfate powder is more than or equal to 98 percent, and the magnesium sulfate powder is purchased from Zhejiang Hua Xuan chemical Co.
The filler comprises floating beads and aluminum silicate cotton powder. The mass ratio of the floating beads to the aluminum silicate cotton powder is 4:3. the average particle diameter of the floating beads is 40 meshes. The specific gravity of the floating beads is 250 kg/m 3 Purchased from 29682 c. The average grain diameter of the aluminum silicate cotton powder is 200 meshes. The content of aluminum silicate in the aluminum silicate cotton powder is 90%, and the aluminum silicate cotton powder is purchased from mineral product processing factories in Lingshou county.
The reinforcing material comprises glass fiber mesh cloth and polypropylene fiber chopped filaments. The mass ratio of the glass fiber mesh cloth to the polypropylene fiber chopped filaments is 2.47:0.23. the mesh specification of the glass fiber mesh cloth is 5 meshes. The glass fiber mesh cloth has a weight of 125g per square gram and is purchased from the glass fiber limited company of Luo Jiangxian Imperial, sichuan province. The polypropylene fiber chopped filaments are purchased from Zhejiang Changming bright non-woven fabrics Co.
The protein foaming agent comprises an animal protein foaming agent and a plant protein foaming agent. The mass ratio of the animal protein foaming agent to the vegetable protein foaming agent is 3.5:4.5. the animal protein foaming agent model: FP-50, the vegetable protein blowing agent model: JK-50. The protein foaming agents are all purchased from Jiukun building materials Co.Ltd.
The modifier comprises citric acid, sodium dihydrogen phosphate and aluminum potassium sulfate. The mass ratio of the citric acid, the sodium dihydrogen phosphate and the aluminum potassium sulfate is 6:7:2.
the preparation method of the magnesium oxysulfide fireproof plate for the tunnel comprises the following steps of: mixing magnesium oxide powder, magnesium sulfate powder, filler, protein foaming agent, modifier and polypropylene fiber chopped filaments uniformly, adding the obtained mixture into a mold, paving glass fiber mesh cloth, rolling, stacking, initial setting, demolding, carrying out secondary curing, drying and cutting to obtain the sulfur oxide fireproof plate.
The reinforcement material is 2mm from the bottom surface.
Example 2
The specific implementation mode of the magnesium oxysulfate fireproof plate for the tunnel is the same as example 1, and the difference is that the mass ratio of the floating beads to the aluminum silicate cotton powder is 1:1.
example 3
The magnesium oxysulfate fireproof plate for the tunnel is the same as in example 1, and is characterized in that the raw materials comprise 40 parts of magnesium oxide powder, 19 parts of magnesium sulfate powder, 35 parts of filler, 2.7 parts of reinforcing material, 0.3 part of protein foaming agent and 3 parts of modifier.
Comparative example 1
The magnesium oxysulfate fireproof plate for the tunnel is the same as in example 1, and is characterized in that the mass ratio of citric acid, sodium dihydrogen phosphate and aluminum potassium sulfate is 6:4:2.
comparative example 2
The magnesium oxysulfide fire-proof plate for the tunnel is the same as that of example 1, and is characterized in that the raw materials comprise 39.5 parts of magnesium oxide powder, 12 parts of magnesium sulfate powder, 35 parts of filler, 2.7 parts of reinforcing material, 0.3 part of protein foaming agent and 3 parts of modifier.
Performance testing
1. Combustion performance test: the tests were carried out according to GB8624-2012 "classification of Combustion Properties of building Material and articles".
2. Mechanical property test: dry bending strength testing was performed according to GB28376-2012 "tunnel fire protection plate".
3. Resistance to reversion: according to GB28376-2012, "Tunnel fireproof protection Board".
TABLE 1 Performance test results
Claims (6)
1. The magnesium oxysulfide fireproof plate for the tunnel is characterized by comprising, by weight, 20-45 parts of magnesium oxide powder, 10-25 parts of magnesium sulfate powder, 20-40 parts of filler, 1.7-3.2 parts of reinforcing material, 0.1-0.4 part of protein foaming agent and 0.05-3.5 parts of modifier;
the filler comprises floating beads and aluminum silicate cotton powder;the mass ratio of the floating beads to the aluminum silicate cotton powder is 4:3, a step of; the specific gravity of the floating beads is 200-300 kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the The average particle size of the floating beads is 40 meshes, and the average particle size of the aluminum silicate cotton powder is 200 meshes;
the protein foaming agent comprises an animal protein foaming agent and a plant protein foaming agent, wherein the mass ratio of the animal protein foaming agent to the plant protein foaming agent is 3.5:4.5;
the modifier comprises citric acid, sodium dihydrogen phosphate and aluminum potassium sulfate; the mass ratio of the citric acid, the sodium dihydrogen phosphate and the aluminum potassium sulfate is 6:7:2.
2. the magnesium oxysulfide fire-retardant board for tunnels according to claim 1, wherein the content of magnesium oxide in the magnesium oxide powder is not less than 85%.
3. The magnesium oxysulfide fire-retardant board for tunnels according to claim 1, wherein the content of magnesium sulfate in the magnesium sulfate powder is not less than 98%.
4. The magnesium oxysulfide fire-retardant board for tunnel according to claim 2, wherein the content of aluminum silicate in the aluminum silicate cotton powder is 87-92%.
5. A magnesium oxysulfide fire-resistant plate for tunnels according to any one of claims 1-4, characterised in that the reinforcing material comprises a glass fibre mesh cloth and polypropylene fibre section shreds.
6. The method for preparing the magnesium oxysulfide fire-retardant plate for tunnels according to claim 5, comprising the following steps: and (3) shredding and mixing the magnesia powder, the magnesium sulfate powder, the filler, the protein foaming agent, the modifier and the polypropylene fiber section uniformly, adding the obtained mixture into a mold, paving glass fiber mesh cloth, rolling, stacking, initial setting, demolding, carrying out secondary maintenance, drying and cutting to obtain the sulfur oxide fireproof plate.
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