CN111892353A - Fireproof flame-retardant thermal insulation mortar and preparation method thereof - Google Patents
Fireproof flame-retardant thermal insulation mortar and preparation method thereof Download PDFInfo
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- 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
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- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- 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
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/36—Glass starting materials for making ceramics, e.g. silica glass
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- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
Abstract
The invention discloses fireproof flame-retardant thermal insulation mortar which comprises the following raw materials in parts by weight: 80-90 parts of Portland cement, 22-26 parts of natural sand, 20-30 parts of refractory material, 9-13 parts of self-extinguishing polystyrene particles, 4-6 parts of reinforcing filler, 1.5-2 parts of vinyl acetate copolymer rubber powder, 0.9-1.2 parts of auxiliary agent and 180 parts of tap water; the invention also discloses a preparation method of the thermal insulation mortar. The mortar is added with the refractory material, the refractory material is modified silicon carbide particles, and the modified silicon carbide has higher density, strength and fire resistance, can be used as a fire-resistant functional substance to improve the fire resistance and flame retardance of the mortar, and can be used as a hard filler to improve the mechanical strength of the hardened mortar; by the auxiliary matching of the reinforcing filler and the vinyl acetate copolymer rubber powder, the flame retardant property of the mortar is improved, and the mechanical strength of the hardened mortar is enhanced, so that the fireproof flame-retardant thermal insulation mortar with high comprehensive performance is obtained.
Description
Technical Field
The invention belongs to the technical field of building coatings, and particularly relates to fireproof flame-retardant thermal insulation mortar and a preparation method thereof.
Background
In order to effectively prevent fire, the building external thermal insulation material is made of material with A-grade combustion performance. Most organic heat-insulating materials such as foamed polystyrene boards, extruded polystyrene boards, foamed phenolic boards and the like cannot achieve the A-grade combustion performance without fire-proof treatment. The inorganic heat-insulating material has the combustion performance reaching A level (non-combustible), is applied to the heat insulation of external walls, and is a novel energy-saving and environment-friendly material. The inorganic heat-insulating material has the advantages of sound insulation, fire prevention, heat insulation, acid resistance, alkali resistance, impact resistance, good respiration, light green material and excellent performance, is difficult to compare with other heat-insulating materials, and has obvious advantages, so the heat-insulating mortar plays an important role in construction.
Chinese invention patent with patent number CN201510282800.1 discloses fireproof flame-retardant thermal insulation mortar for building exterior walls and a preparation method thereof, wherein the mortar is prepared from the following raw materials in parts by weight: 2-4 parts of waste rubber powder, 35-40 parts of vitrified micro bubbles, 3-5 parts of microporous calcium silicate, 1-2 parts of zinc borate, 33-38 parts of common cement, 0.4-0.6 part of calcium sulphoaluminate, 0.5-1 part of sodium polyacrylate, 0.2-0.4 part of alum, 1-2 parts of dodecanol, 1-1.2 parts of sodium metasilicate and 8-10 parts of synergist; the synergist is prepared from the following raw materials in parts by weight: 45-50 parts of crop straw, 20-24 parts of waterborne polyurethane, 3-5 parts of silicon carbide, 2-3 parts of polypropylene fiber, 7-9 parts of methyl acrylate, 4-6 parts of butyl oleate, 4-5 parts of aluminum hydroxide, 7-9 parts of 200-mesh mullite powder, 3-5 parts of polyethylene glycol, 2-3 parts of epoxidized soybean oil, 1-2 parts of hydroxypropyl methyl cellulose ether and 20-25 parts of water; the obtained mortar has higher crack resistance, fire resistance and flame retardance. The method uses a large amount of vitrified micro bubbles, has the defects of heavy weight, easy breakage and high water absorption rate, and causes the reduction of the waterproof and heat-insulating properties of the mortar.
Disclosure of Invention
The invention aims to provide fireproof flame-retardant thermal insulation mortar and a preparation method thereof, wherein a fireproof material is added into the mortar to replace conventional vitrified microbeads, the fireproof material is modified silicon carbide particles, and the modified silicon carbide has higher density, strength and fireproof performance, so that the fireproof flame-retardant mortar not only can be used as a fireproof functional substance to improve the fireproof flame-retardant performance of the mortar, but also can be used as a hard filler to improve the mechanical strength of the hardened mortar; by the auxiliary matching of the reinforcing filler and the vinyl acetate copolymer rubber powder, the flame retardant property of the mortar is improved, and the mechanical strength of the hardened mortar is enhanced, so that the fireproof flame-retardant thermal insulation mortar with high comprehensive performance is obtained, and the application value is very high.
The purpose of the invention can be realized by the following technical scheme:
the fireproof flame-retardant thermal insulation mortar comprises the following raw materials in parts by weight: 80-90 parts of Portland cement, 22-26 parts of natural sand, 20-30 parts of refractory material, 9-13 parts of self-extinguishing polystyrene particles, 4-6 parts of reinforcing filler, 1.5-2 parts of vinyl acetate copolymer rubber powder, 0.9-1.2 parts of auxiliary agent and 180 parts of tap water;
the fireproof flame-retardant thermal insulation mortar is prepared by the following steps:
firstly, compounding and dry-mixing Portland cement, natural sand, refractory materials, self-extinguishing polystyrene particles and an auxiliary agent for 3-5min, slowly adding tap water, and uniformly stirring;
and secondly, sequentially adding the reinforcing filler and the vinyl acetate copolymer rubber powder, and blending for 6-8min to obtain the mortar.
Further, the self-extinguishing polystyrene particle has a particle size of 4 to 5 mm.
Further, the auxiliary agent comprises a retarder, a thickener and an air entraining agent, and the mass ratio of the retarder to the thickener to the air entraining agent is 18:17: 7; wherein the retarder is a compound of sodium gluconate and white sugar, and the mass ratio of the sodium gluconate to the white sugar is 1: 4; the thickening agent is a compound obtained by mixing hydroxypropyl methyl cellulose ether and xanthan gum according to the mass ratio of 3: 2.
Further, the reinforcing filler is a compound of mountain flour, carbon fibers and magnesium-aluminum carbonate hydrotalcite, and the mass ratio of the mountain flour, the carbon fibers and the magnesium-aluminum carbonate hydrotalcite is 10:4-5: 5-6; the particle size of the stone powder is less than 0.075 mm.
Further, the refractory material is prepared by the following method:
s1, mixing and ball-milling the magnesium oxide, the aluminum oxide and the silicon dioxide according to the mass ratio of 1:1:1 for 60-70min, placing the powder in an electric furnace, preserving heat for 2h at 1500 ℃, melting, quenching in water after melting, ball-milling again, making the powder, and sieving with a 250-mesh sieve to obtain glass powder;
s2, uniformly mixing 150-mesh SiC particles and glass powder according to a mass ratio of 9:1, tabletting, drying the sheet at 110 ℃ for 4h, then placing the sheet in an electric furnace to fire at 1430 ℃ for 2h, cooling to 1360 ℃ after firing, keeping the temperature for 2h, then cooling to room temperature at a temperature of 6 ℃/min, and ball-milling and sieving with a 150-mesh sieve to obtain the refractory material.
A preparation method of fireproof flame-retardant thermal insulation mortar comprises the following steps:
firstly, compounding and dry-mixing portland cement, natural sand, a refractory material, self-extinguishing polystyrene particles and an auxiliary agent for 3-5min, slowly adding tap water, and uniformly stirring;
and secondly, sequentially adding the reinforcing filler and the vinyl acetate copolymer rubber powder, and blending for 6-8min to obtain the mortar.
The invention has the beneficial effects that:
the vinyl acetate copolymer rubber powder is added into the mortar, the polymer rubber powder can improve the dry shrinkage rate of the cement mortar containing the hydrosilicate, and active groups (carbonyl) exist in the vinyl acetate copolymer rubber powder, so that the water consumption for cement hydration is reduced, the efficiency of hydration water is improved, and pores generated by water evaporation are reduced; secondly, because the vinyl acetate copolymer rubber powder can generate tiny bubbles in the water dispersion process, the bubbles can block capillary tubes in the hardened mortar, thereby reducing the evaporation of water and reducing the drying shrinkage of the hardened cement paste;
according to the invention, the reinforcing filler is added into the mortar, the reinforcing filler is a compound of stone powder, carbon fiber and magnesium aluminum carbonate hydrotalcite, the stone powder can optimize the hardened pore structure, and the strength and impermeability of the mortar are improved while the sound absorption of the mortar is not influenced; the magnesium-aluminum carbonate hydrotalcite is a layered double metal hydroxide and can provide flame retardant property for the mortar;
according to the invention, the refractory material is added into the mortar, the added glass powder is used as a bonding material to sinter the silicon carbide, the glass powder is melted to form a liquid phase in the sintering process, the SiC particles are well wrapped, the air holes are filled, the liquid phase sintering effect is achieved, the density and the strength of the refractory material are improved, the thermal expansion coefficient of the SiC particles can be effectively reduced, and the refractory performance of the refractory material is improved; the fireproof material is added into mortar, not only can be used as a fireproof functional substance to improve the fireproof and flame-retardant performance of the mortar, but also can be used as a hard filler to improve the mechanical strength of the hardened mortar;
the mortar is added with the refractory material to replace conventional vitrified micro bubbles, the refractory material is modified silicon carbide particles, and the modified silicon carbide has higher density, strength and fire resistance, not only can be used as a fire-resistant functional substance to improve the fire resistance and fire resistance of the mortar, but also can be used as a hard filler to improve the mechanical strength of the hardened mortar; by the auxiliary matching of the reinforcing filler and the vinyl acetate copolymer rubber powder, the flame retardant property of the mortar is improved, and the mechanical strength of the hardened mortar is enhanced, so that the fireproof flame-retardant thermal insulation mortar with high comprehensive performance is obtained, and the application value is very high.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The fireproof flame-retardant thermal insulation mortar comprises the following raw materials in parts by weight: 80-90 parts of Portland cement, 22-26 parts of natural sand, 20-30 parts of refractory material, 9-13 parts of self-extinguishing polystyrene particles, 4-6 parts of reinforcing filler, 1.5-2 parts of vinyl acetate copolymer rubber powder, 0.9-1.2 parts of auxiliary agent and 180 parts of tap water;
the particle size of the self-extinguishing type polystyrene particles is 4-5mm, and the cement particles can better wrap the particles by doping the self-extinguishing type polystyrene particles with larger particle size, so the construction performance is better; the self-extinguishing polystyrene particles have good flame-retardant and fireproof performance, and endow the mortar with good flame-retardant and fireproof performance;
the auxiliary agent comprises a retarder, a thickening agent and an air entraining agent, and the mass ratio of the retarder to the thickening agent to the air entraining agent is 18:17: 7; wherein the retarder is a compound of sodium gluconate and white sugar, and the mass ratio of the sodium gluconate to the white sugar is 1: 4; compared with sodium gluconate, white sugar has longer retardation time and more obvious strength enhancement effect, but on the retention capacity of working performance, sodium gluconate has better performance, so that the retarder selects a compound of the two, can play a role in complementing advantages and ensures that wet-mixed pulp has longer open time; the thickening agent is a compound obtained by mixing hydroxypropyl methyl cellulose ether and xanthan gum according to the mass ratio of 3:2, the rheological property of the mortar can be improved by doping the hydroxypropyl methyl cellulose ether, but the water retention capacity of the hydroxypropyl methyl cellulose ether on the mortar is poor, and slight bleeding of the mortar is easily caused, so that the water retention of the mortar is remarkably improved by selecting the xanthan gum for compounding (the water retention rate is not less than 88%);
the vinyl acetate copolymer rubber powder can improve the dry shrinkage rate of the cement mortar containing the hydrosilicate, and active groups (carbonyl) exist in the vinyl acetate copolymer rubber powder, so that the water consumption required by cement hydration is reduced, the efficiency of hydration water is improved, and pores generated by water evaporation are reduced; secondly, because the vinyl acetate copolymer rubber powder can generate tiny bubbles in the water dispersion process, the bubbles can block capillary tubes in the hardened mortar, thereby reducing the evaporation of water and reducing the drying shrinkage of the hardened cement paste;
the reinforcing filler is a compound of mountain flour, carbon fiber and magnesium-aluminum carbonate hydrotalcite, and the mass ratio of the mountain flour, the carbon fiber and the magnesium-aluminum carbonate hydrotalcite is 10:4-5: 5-6; the particle size of the stone powder is less than 0.075mm, the stone powder can optimize the hardened pore structure, and the strength and the impermeability of the mortar are improved while the sound absorption of the mortar is not influenced; the magnesium-aluminum carbonate hydrotalcite is a layered double metal hydroxide and can provide flame retardant property for the mortar;
the refractory material is prepared by the following method:
s1, mixing and ball-milling the magnesium oxide, the aluminum oxide and the silicon dioxide according to the mass ratio of 1:1:1 for 60-70min, placing the powder in an electric furnace, preserving heat for 2h at 1500 ℃, melting, quenching in water after melting, ball-milling again, making the powder, and sieving with a 250-mesh sieve to obtain glass powder;
s2, uniformly mixing 150-mesh SiC particles and glass powder according to a mass ratio of 9:1, tabletting, drying the sheet at 110 ℃ for 4h, then placing the sheet in an electric furnace to fire at 1430 ℃ for 2h, cooling to 1360 ℃ after firing, keeping the temperature for 2h, then cooling to room temperature at a temperature of 6 ℃/min, and ball-milling and sieving with a 150-mesh sieve to obtain the refractory material;
the added glass powder is used as a bonding material, the silicon carbide is sintered, and the glass powder is melted to form a liquid phase in the sintering process, so that SiC particles are well wrapped, air holes are filled, the liquid phase sintering effect is achieved, the density and the strength of the refractory material are improved, the thermal expansion coefficient of the SiC particles can be effectively reduced, and the refractory performance of the refractory material is improved; the fireproof material is added into mortar, not only can be used as a fireproof functional substance to improve the fireproof and flame-retardant performance of the mortar, but also can be used as a hard filler to improve the mechanical strength of the hardened mortar;
the preparation method of the thermal insulation mortar comprises the following steps:
firstly, compounding and dry-mixing portland cement, natural sand, a refractory material, self-extinguishing polystyrene particles and an auxiliary agent for 3-5min, slowly adding tap water, and uniformly stirring;
and secondly, sequentially adding the reinforcing filler and the vinyl acetate copolymer rubber powder, and blending for 6-8min to obtain the mortar.
Example 1
The fireproof flame-retardant thermal insulation mortar comprises the following raw materials in parts by weight: 80 parts of Portland cement, 22 parts of natural sand, 20 parts of refractory material, 9 parts of self-extinguishing polystyrene particles, 4 parts of reinforcing filler, 1.5 parts of vinyl acetate copolymer rubber powder, 0.9 part of auxiliary agent and 160 parts of tap water;
the thermal insulation mortar is prepared by the following steps:
firstly, compounding and dry-mixing portland cement, natural sand, a refractory material, self-extinguishing polystyrene particles and an auxiliary agent for 3min, slowly adding tap water, and uniformly stirring;
and secondly, sequentially adding the reinforcing filler and the vinyl acetate copolymer rubber powder, and blending for 6min to obtain the mortar.
Example 2
The fireproof flame-retardant thermal insulation mortar comprises the following raw materials in parts by weight: 85 parts of Portland cement, 24 parts of natural sand, 25 parts of refractory material, 11 parts of self-extinguishing polystyrene particles, 5 parts of reinforcing filler, 1.8 parts of vinyl acetate copolymer rubber powder, 1.1 parts of auxiliary agent and 170 parts of tap water;
the thermal insulation mortar is prepared by the following steps:
firstly, compounding and dry-mixing portland cement, natural sand, a refractory material, self-extinguishing polystyrene particles and an auxiliary agent for 4min, slowly adding tap water, and uniformly stirring;
and secondly, sequentially adding the reinforcing filler and the vinyl acetate copolymer rubber powder, and blending for 7min to obtain the mortar.
Example 3
The fireproof flame-retardant thermal insulation mortar comprises the following raw materials in parts by weight: 90 parts of Portland cement, 26 parts of natural sand, 30 parts of refractory material, 13 parts of self-extinguishing polystyrene particles, 6 parts of reinforcing filler, 2 parts of vinyl acetate copolymer rubber powder, 1.2 parts of auxiliary agent and 180 parts of tap water;
the thermal insulation mortar is prepared by the following steps:
firstly, compounding and dry-mixing portland cement, natural sand, a refractory material, self-extinguishing polystyrene particles and an auxiliary agent for 5min, slowly adding tap water, and uniformly stirring;
and secondly, sequentially adding the reinforcing filler and the vinyl acetate copolymer rubber powder, and blending for 8min to obtain the mortar.
Comparative example
The refractory in example 1 was changed to ordinary silicon carbide particles, and the remaining raw materials and preparation process were not changed.
The mortars obtained in examples 1 to 3 and comparative example were tested for the following properties:
testing the dry density, compressive strength and heat conductivity coefficient of the mortar according to a method specified in GB/T20473-2006 building thermal insulation mortar standard; testing the combustion performance and the fracture energy; the test results are given in the following table:
as can be seen from the above table, the dry density of the thermal mortar prepared in examples 1-3 is 292--3The compressive strength is 1.05-1.06MPa, and the thermal conductivity is 0.058-0.060W (m.K)-1The combustion performance reaches A1 grade, and the fracture energy is 362-366 N.m-1The mortar prepared by the invention has good mechanical property, good fireproof and flame retardant properties and extremely high comprehensive performance; compared with a comparative example, the method shows that after the silicon carbide is modified by the glass powder, the strength, the density and the fireproof performance of the silicon carbide can be improved, and the silicon carbide is further added into the mortar, so that the mechanical strength of the silicon carbide can be improved on the basis of improving the fireproof performance of the mortar.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The fireproof flame-retardant thermal insulation mortar is characterized by comprising the following raw materials in parts by weight: 80-90 parts of Portland cement, 22-26 parts of natural sand, 20-30 parts of refractory material, 9-13 parts of self-extinguishing polystyrene particles, 4-6 parts of reinforcing filler, 1.5-2 parts of vinyl acetate copolymer rubber powder, 0.9-1.2 parts of auxiliary agent and 180 parts of tap water;
the fireproof flame-retardant thermal insulation mortar is prepared by the following steps:
firstly, compounding and dry-mixing portland cement, natural sand, a refractory material, self-extinguishing polystyrene particles and an auxiliary agent for 3-5min, slowly adding tap water, and uniformly stirring;
and secondly, sequentially adding the reinforcing filler and the vinyl acetate copolymer rubber powder, and blending for 6-8min to obtain the mortar.
2. The fire-retardant and heat-insulating mortar according to claim 1, wherein the self-extinguishing polystyrene particles have a particle size of 4 to 5 mm.
3. The fireproof and flame-retardant thermal insulation mortar according to claim 1, wherein the auxiliary agents comprise a retarder, a thickener and an air-entraining agent, and the mass ratio of the retarder, the thickener and the air-entraining agent is 18:17: 7; wherein the retarder is a compound of sodium gluconate and white sugar, and the mass ratio of the sodium gluconate to the white sugar is 1: 4; the thickening agent is a compound obtained by mixing hydroxypropyl methyl cellulose ether and xanthan gum according to the mass ratio of 3: 2.
4. The fire-retardant and heat-preservation mortar according to claim 1, wherein the reinforcing filler is a compound of stone powder, carbon fiber and magnesium aluminum carbonate hydrotalcite, and the mass ratio of the stone powder, the carbon fiber and the magnesium aluminum carbonate hydrotalcite is 10:4-5: 5-6; the particle size of the stone powder is less than 0.075 mm.
5. The fire-retardant and heat-preservation mortar according to claim 1, wherein the fire-resistant material is prepared by the following method:
s1, mixing and ball-milling the magnesium oxide, the aluminum oxide and the silicon dioxide according to the mass ratio of 1:1:1 for 60-70min, placing the powder in an electric furnace, preserving heat for 2h at 1500 ℃, melting, quenching in water after melting, ball-milling again, making the powder, and sieving with a 250-mesh sieve to obtain glass powder;
s2, uniformly mixing 150-mesh SiC particles and glass powder according to a mass ratio of 9:1, tabletting, drying the sheet at 110 ℃ for 4h, then placing the sheet in an electric furnace to fire at 1430 ℃ for 2h, cooling to 1360 ℃ after firing, keeping the temperature for 2h, then cooling to room temperature at a temperature of 6 ℃/min, and ball-milling and sieving with a 150-mesh sieve to obtain the refractory material.
6. The preparation method of the fireproof and flame-retardant thermal mortar according to claim 1, which is characterized by comprising the following steps:
firstly, compounding and dry-mixing portland cement, natural sand, a refractory material, self-extinguishing polystyrene particles and an auxiliary agent for 3-5min, slowly adding tap water, and uniformly stirring;
and secondly, sequentially adding the reinforcing filler and the vinyl acetate copolymer rubber powder, and blending for 6-8min to obtain the mortar.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113831079A (en) * | 2021-09-23 | 2021-12-24 | 青岛科技大学 | Thermal insulation mortar with good thixotropic property and preparation method thereof |
| CN113926494A (en) * | 2021-11-18 | 2022-01-14 | 银川市生产力促进中心 | SiC binder catalyst carrier, catalyst, preparation method and application thereof |
| CN114605130A (en) * | 2022-04-07 | 2022-06-10 | 武汉质高环保科技有限公司 | Fireproof thermal insulation facing mortar and preparation method and application thereof |
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| CN113926494B (en) * | 2021-11-18 | 2023-10-31 | 银川市生产力促进中心 | SiC binder catalyst carrier, catalyst, preparation method and application thereof |
| CN114605130A (en) * | 2022-04-07 | 2022-06-10 | 武汉质高环保科技有限公司 | Fireproof thermal insulation facing mortar and preparation method and application thereof |
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Application publication date: 20201106 |