CN108101480B - Preparation method of compression-resistant aerated brick - Google Patents
Preparation method of compression-resistant aerated brick Download PDFInfo
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- CN108101480B CN108101480B CN201711246661.2A CN201711246661A CN108101480B CN 108101480 B CN108101480 B CN 108101480B CN 201711246661 A CN201711246661 A CN 201711246661A CN 108101480 B CN108101480 B CN 108101480B
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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
- C04B28/14—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 calcium sulfate 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0022—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors
- C04B38/0025—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors starting from inorganic materials only, e.g. metal foam; Lanxide type products
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
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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
- C04B2111/40—Porous or lightweight materials
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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
Abstract
The invention discloses a preparation method of a compression-resistant aerated brick, and belongs to the technical field of building materials. Weighing fluorite slag powder, cement, gypsum, modified mixed powder, pretreated vitrified micro bubbles, mixed nano powder, aluminum powder, sepiolite, graphite oxide, talcum powder, calcium stearate, sodium stearate, a dispersant and water in sequence according to parts by weight, calcining the fluorite slag powder to obtain pretreated fluorite slag powder, mixing the pretreated fluorite slag powder with the gypsum, adding water, stirring and mixing to obtain pretreated mixed slurry, mixing the pretreated mixed slurry with the cement, adding the modified mixed powder, pretreating vitrified micro bubbles, mixing nano powder, aluminum powder, sepiolite, graphite oxide, talcum powder, calcium stearate, sodium stearate and the dispersant, stirring and mixing to obtain mixed slurry, casting and molding the mixed slurry, pre-curing, demolding to obtain a blank, and performing autoclaved curing on the blank to obtain the compression-resistant aerated brick. The compression-resistant aerated brick obtained by the invention has excellent compression resistance.
Description
Technical Field
The invention discloses a preparation method of a compression-resistant aerated brick, and belongs to the technical field of building materials.
Background
The aerated brick is an autoclaved aerated concrete block, which is called aerated brick for short and is produced by a high-temperature autoclaved equipment process. "aerated brick" is to be understood as a simplified or generic term. The range of products covered by the brick is a little larger, namely, bricks produced by other various processes including autoclaving.
The aerated brick has the advantages that: 1. the weight is light. The aerated concrete block generally has the weight of 500-700 kg/m3, which is just equivalent to 1/4-1/5 of clay bricks, and 1/5 of common concrete is a lighter one of the concretes. The self weight of the building is reduced by more than 40 percent compared with the self weight of a common brick concrete structure building. 2. The heat preservation and insulation performance is good. The heat conductivity coefficient of the aerated concrete is 1/6 of common concrete, and the heat insulation performance is greatly superior to that of a 240mm thick clay brick wall. 3. The shock resistance is strong. The aerated concrete has light volume, good overall performance and small inertia force during earthquake, so the aerated concrete has certain earthquake resistance. 4. The processing performance is good. The aerated concrete has good processing performance, can be sawed, planed, nailed, milled and drilled, and brings great convenience and flexibility to construction. 5. Has certain high temperature resistance. The compressive strength of the aerated concrete is slightly increased when the temperature is below 600 ℃, and the compressive strength of the aerated concrete is close to that of the aerated concrete at normal temperature when the temperature is about 600 ℃, so that the fireproof performance reaches the national first-grade fireproof standard. 6. The sound insulation performance is good. The internal structure of the aerated concrete is like bread, and a large number of closed air holes are uniformly distributed, so that the aerated concrete has sound absorption performance which is not possessed by common building materials. 7. And the adaptability is strong. Can be measured and customized according to different raw materials and different conditions in the locality. The raw materials can be river sand, fly ash, ore sand and the like according to local conditions. Can utilize waste, is beneficial to environmental protection and really changes waste into valuable. However, the traditional aerated brick still has the problem of poor compression resistance, so the traditional aerated brick needs to be researched.
Disclosure of Invention
The invention mainly solves the technical problems that: aiming at the problem of poor compression resistance of the traditional aerated brick, the preparation method of the compression-resistant aerated brick is provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
(1) zeolite is crushed and sieved to obtain zeolite powder, the zeolite powder is aerobically calcined at high temperature to obtain pretreated zeolite powder, porous ceramic is crushed and sieved to obtain porous ceramic powder, and the mass ratio of the pretreated zeolite powder to the porous ceramic powder is 3: 1 to 4: 1, mixing and stirring to obtain mixed powder;
(2) mixing the mixed powder with a saturated sodium carbonate solution according to a mass ratio of 1: 5-1: 10, mixing, cooling, filtering and drying to obtain pre-treatment mixed powder, wherein the pre-treatment mixed powder and a calcium hydroxide solution are mixed according to a mass ratio of 1: 3-1: 5, mixing, introducing carbon dioxide gas, filtering, and freeze-drying to obtain modified mixed powder;
(3) mixing the vitrified micro bubbles with a sodium hydroxide solution according to a mass ratio of 1: 3-1: 5, mixing, soaking at room temperature, filtering to obtain pretreated vitrified micro bubbles, and mixing the pretreated vitrified micro bubbles with the phenolic resin according to a mass ratio of 1: 4-1: 6, mixing, adding a silane coupling agent with the mass of 0.2-0.3 time that of the pretreated vitrified micro-beads, stirring and mixing, and filtering to obtain modified vitrified micro-beads;
(4) mixing the modified vitrified micro bubbles with paraffin according to the mass ratio of 1: 6-1: 8, mixing and soaking, adding a curing agent with the mass of 0.10-0.12 time that of the modified paraffin and alumina with the mass of 0.2-0.3 time that of the modified paraffin, stirring and mixing, and freezing and crushing to obtain pretreated modified vitrified micro bubbles;
(5) weighing 20-25 parts of fluorite slag powder, 15-18 parts of cement, 8-10 parts of gypsum, 5-10 parts of modified mixed powder, 8-12 parts of pretreated modified vitrified micro bubbles, 4-6 parts of mixed nano powder, 4-6 parts of aluminum powder, 3-5 parts of sepiolite, 2-3 parts of graphite oxide, 2-4 parts of talcum powder, 1-2 parts of calcium stearate, 1-2 parts of sodium stearate, 0.1-0.2 part of dispersing agent and 5-12 parts of water in sequence, calcining the fluorite slag powder to obtain pretreated fluorite slag powder, mixing the pretreated fluorite slag powder with the gypsum, adding water, stirring and mixing to obtain pretreated mixed slurry, mixing the pretreated mixed slurry with the cement, sequentially adding the modified mixed powder, the pretreated modified vitrified micro bubbles, the mixed nano powder, the aluminum powder, sepiolite, graphite oxide, talcum powder and calcium stearate, stirring and mixing sodium stearate and a dispersing agent to obtain mixed slurry, casting and molding the mixed slurry to obtain a pretreated blank, pre-curing the pretreated blank, demolding to obtain a blank, and performing autoclaved curing on the blank to obtain the compression-resistant aerated brick.
The porous ceramic in the step (1) is any one of corundum material porous ceramic, aluminosilicate material porous ceramic or cordierite material porous ceramic.
And (3) adding water into a beaker, heating until the temperature of the water in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution.
The silane coupling agent in the step (3) is any one of a silane coupling agent KH-550, a silane coupling agent KH-560 or a silane coupling agent KH-570.
And (4) the paraffin is a paraffin mixture with the carbon number of 24-30.
And (4) the curing agent is any one of m-phenylenediamine, vinyl triamine or ethylene diamine.
The preparation method of the mixed nano powder in the step (5) comprises the steps of crushing waste concrete and sieving the crushed waste concrete with a sieve of 80-160 meshes to obtain concrete powder, wherein the mass ratio of nano titanium dioxide to nano silicon dioxide is 1: 2-1: 3, mixing, adding concrete powder which is 5-6 times of the mass of the nano titanium dioxide, and stirring and mixing to obtain mixed nano powder.
The dispersant in the step (5) is any one of dispersant MF, dispersant NNO or dispersant 5040.
The invention has the beneficial effects that:
(1) the invention adds modified mixed powder when preparing the compression-resistant aerated brick, firstly, the modified mixed powder contains zeolite powder and porous ceramic powder, after being added into an aerated brick system, the modified mixed powder can fill capillary pores in the system, and because the zeolite powder and the porous ceramic powder contain more pores and have better mechanical property, the compression resistance of the product is improved, the sound insulation effect is improved, secondly, calcium bicarbonate and calcium carbonate are deposited in the zeolite powder and the porous ceramic powder in the modification process of the modified mixed powder, the calcium bicarbonate can be decomposed to generate calcium carbonate, water and carbon dioxide in the preparation process of the product after being added into the system, the calcium carbonate generated by decomposition can fill the pores in the zeolite powder, the porous ceramic powder and the sepiolite, so that the zeolite powder, the mechanical properties of the porous ceramic powder and the sepiolite are further improved, so that the compression resistance of the product is further improved, the generated water can promote the cement to be hydrated more completely, the compactness of the product is improved, the compression resistance is improved, and the generated carbon dioxide can form holes in a system, so that the weight of the product is reduced;
(2) the invention adds the pretreated modified vitrified micro bubbles when preparing the compression-resistant aerated brick, on one hand, the vitrified micro bubbles have the advantages of light weight and good mechanical property, the product quality can be reduced after the vitrified micro bubbles are added into an aerated brick system, the compression resistance of the product is ensured, in addition, certain pores are arranged inside the vitrified micro bubbles, the sound insulation property of the product can be improved after the vitrified micro bubbles are added into the aerated brick system, on the other hand, after the vitrified micro bubbles are treated, phenolic resin is adsorbed inside and on the surface of the vitrified micro bubbles, and a layer of paraffin containing curing agent and aluminum hydroxide is wrapped on the surface after the pretreatment, in the preparation process of the product, the phenolic resin can be cured under the action of the curing agent, the mechanical property of the vitrified micro bubbles is improved, thereby the compression resistance of the product is improved, and the paraffin can be melted and carries the aluminum hydroxide to fill the tiny pores inside the system in the preparation process, thereby further improving the compression resistance of the product.
Detailed Description
Moving zeolite into a pulverizer, pulverizing and sieving with a 120-200-mesh sieve to obtain zeolite powder, moving the zeolite powder into a calcining furnace, carrying out high-temperature aerobic calcination for 45-75 min at the temperature of 500-800 ℃ to obtain pretreated zeolite powder, moving porous ceramic into the pulverizer, pulverizing, sieving with a 120-180-mesh sieve to obtain porous ceramic powder, and mixing the pretreated zeolite powder and the porous ceramic powder according to the mass ratio of 3: 1-4: 1, mixing the mixture in a stirrer, and stirring for 15-30 min at the rotating speed of 200-300 r/min to obtain mixed powder; mixing the mixed powder with a saturated sodium carbonate solution according to a mass ratio of 1: 5-1: 10, mixing the materials in a beaker, stirring the materials for 15-20 min under the conditions that the temperature is 60 ℃ and the rotating speed is 280-380 r/min, cooling the materials in the beaker to 15-20 ℃, filtering to obtain a filter cake, transferring the filter cake into a drying box, drying the filter cake for 30-35 min at a constant temperature of 60-80 ℃ to obtain pretreated mixed powder, and mixing the pretreated mixed powder with a calcium hydroxide solution with the mass fraction of 5-10% according to the mass ratio of 1: 3-1: 5, mixing the mixture in a flask, introducing carbon dioxide gas into the flask at the speed of 12-15 ml/min, reacting at the constant temperature of 0-2 ℃ for 45-60 mnin, filtering to obtain filter residue, and freeze-drying the filter residue to obtain modified mixed powder; mixing the vitrified micro bubbles with a sodium hydroxide solution with the mass fraction of 20-35% according to the mass ratio of 1: 3-1: 5, mixing, soaking for 25-45 min at room temperature, filtering to obtain pretreated vitrified micro bubbles, and mixing the pretreated vitrified micro bubbles with phenolic resin according to a mass ratio of 1: 4-1: 6, mixing, adding a silane coupling agent with the mass of 0.2-0.3 times that of the pretreated vitrified micro bubbles into the mixture of the pretreated vitrified micro bubbles and the phenolic resin, stirring and mixing for 50-80 min at the temperature of 55-75 ℃ and the rotating speed of 250-350 r/min, and filtering to obtain modified vitrified micro bubbles; mixing the modified vitrified micro bubbles with paraffin according to the mass ratio of 1: 6-1: 8, mixing, adding a curing agent with the mass of 0.10-0.12 time of that of the modified vitrified micro bubbles and alumina with the mass of 0.2-0.3 time of that of the modified vitrified micro bubbles into the mixture of the modified vitrified micro bubbles and paraffin, stirring and mixing for 20-40 min under the conditions that the temperature is 55-70 ℃ and the rotating speed is 350-400 r/min to obtain a vitrified micro bubble mixture, and freezing and crushing the vitrified micro bubble mixture to obtain pretreated modified vitrified micro bubbles; weighing 20-25 parts of fluorite slag powder, 15-18 parts of cement, 8-10 parts of gypsum, 5-10 parts of modified mixed powder, 8-12 parts of pretreated modified vitrified micro bubbles, 4-6 parts of mixed nano powder, 4-6 parts of aluminum powder, 3-5 parts of sepiolite, 2-3 parts of graphite oxide, 2-4 parts of talcum powder, 1-2 parts of calcium stearate, 1-2 parts of sodium stearate, 0.1-0.2 part of dispersing agent and 5-12 parts of water in sequence according to parts by weight, transferring the fluorite slag powder into a calcining furnace, calcining for 3-5 hours at the temperature of 400-600 ℃ to obtain pretreated fluorite slag powder, mixing the pretreated fluorite slag powder and the gypsum in a stirrer, adding the water into the stirrer, stirring and mixing for 2-4 minutes at the temperature of 45-65 ℃ and the rotating speed of 600-1000 r/min to obtain pretreated mixed slurry, mixing the pretreated mixed slurry and the cement in a mixer, and sequentially adding modified mixed powder, pretreated modified vitrified micro bubbles, mixed nano powder, aluminum powder, sepiolite, graphite oxide, talcum powder, calcium stearate, sodium stearate and a dispersing agent into a mixer, stirring and mixing for 3-5 min at the temperature of 45-60 ℃ and the rotating speed of 1000-1500 r/min to obtain mixed slurry, moving the mixed slurry into a mold, casting and molding to obtain a pretreated blank, precuring the pretreated blank for 3-5 h at the temperature of 60-80 ℃, demolding to obtain a blank, and autoclaved and cured the blank for 18-24 h at the temperature of 160-220 ℃ and the pressure of 1.0-1.8 MPa to obtain the pressure-resistant aerated brick. The porous ceramic is any one of corundum material porous ceramic, aluminosilicate material porous ceramic or cordierite material porous ceramic. The preparation method of the saturated sodium carbonate solution comprises the steps of adding water into a beaker, heating until the water temperature in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution. The preparation method of the saturated sodium carbonate solution comprises the steps of adding water into a beaker, heating until the temperature of the water in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution. The paraffin is a paraffin mixture with 24-30 carbon atoms. The curing agent is any one of m-phenylenediamine, vinyl triamine or ethylenediamine. The preparation method of the mixed nano powder comprises the steps of crushing waste concrete and sieving the waste concrete by a sieve of 80-160 meshes to obtain concrete powder, wherein the nano titanium dioxide and the nano silicon dioxide are mixed according to the mass ratio of 1: 2-1: 3, mixing, adding concrete powder which is 5-6 times of the mass of the nano titanium dioxide, and stirring and mixing to obtain mixed nano powder. The dispersant is any one of dispersant MF, dispersant NNO or dispersant 5040.
Example 1
Transferring zeolite into a pulverizer, pulverizing and sieving with a 200-mesh sieve to obtain zeolite powder, transferring the zeolite powder into a calcining furnace, carrying out high-temperature aerobic calcination for 75min at the temperature of 800 ℃ to obtain pretreated zeolite powder, transferring porous ceramic into the pulverizer to pulverize, sieving with a 180-mesh sieve to obtain porous ceramic powder, and mixing the pretreated zeolite powder and the porous ceramic powder according to the mass ratio of 4: 1, mixing the mixture in a stirrer, and stirring the mixture for 30min at the rotating speed of 300r/min to obtain mixed powder; mixing the mixed powder with a saturated sodium carbonate solution according to a mass ratio of 1: 10, mixing the mixture in a beaker, mixing and stirring the mixture for 20min at the temperature of 60 ℃ and the rotating speed of 380r/min, cooling the material in the beaker to 20 ℃, filtering the mixture to obtain a filter cake, transferring the filter cake into a drying box, drying the filter cake for 35min at the constant temperature of 80 ℃ to obtain pre-treated mixed powder, mixing the pre-treated mixed powder with a calcium hydroxide solution with the mass fraction of 10% according to the mass ratio of 1: 5, mixing the mixture in a flask, introducing carbon dioxide gas into the flask at the speed of 15ml/min, reacting for 60 min at the constant temperature of 2 ℃, filtering to obtain filter residue, and freeze-drying the filter residue to obtain modified mixed powder; mixing the vitrified micro beads with 35% sodium hydroxide solution according to the mass ratio of 1: 5, mixing, soaking for 45min at room temperature, filtering to obtain pretreated vitrified micro bubbles, and mixing the pretreated vitrified micro bubbles with phenolic resin according to a mass ratio of 1: 6, mixing, adding a silane coupling agent with the mass being 0.3 times that of the pretreated vitrified micro bubbles into the mixture of the pretreated vitrified micro bubbles and the phenolic resin, stirring and mixing for 80min at the temperature of 75 ℃ and the rotating speed of 350r/min, and filtering to obtain modified vitrified micro bubbles; mixing the modified vitrified micro bubbles with paraffin according to the mass ratio of 1: 8, mixing, adding a curing agent with the mass 0.12 times that of the modified vitrified micro bubbles and alumina with the mass 0.3 times that of the modified vitrified micro bubbles into the mixture of the modified vitrified micro bubbles and paraffin, stirring and mixing for 40min under the conditions that the temperature is 70 ℃ and the rotating speed is 400r/min to obtain a vitrified micro bubble mixture, and freezing and crushing the vitrified micro bubble mixture to obtain pretreated modified vitrified micro bubbles; weighing 25 parts of fluorite slag powder, 18 parts of cement, 10 parts of gypsum, 10 parts of modified mixed powder, 12 parts of pretreated modified vitrified micro bubbles, 6 parts of mixed nano powder, 6 parts of aluminum powder, 5 parts of sepiolite, 3 parts of graphite oxide, 4 parts of talcum powder, 2 parts of calcium stearate, 2 parts of sodium stearate, 0.2 part of dispersing agent and 12 parts of water in sequence, transferring the fluorite slag powder into a calcining furnace, calcining for 5 hours at the temperature of 600 ℃ to obtain pretreated fluorite slag powder, mixing the pretreated fluorite slag powder and the gypsum in a stirring machine, adding the water into the stirring machine, stirring and mixing for 4 minutes at the temperature of 65 ℃ and the rotating speed of 1000r/min to obtain pretreated mixed slurry, mixing the pretreated mixed slurry and the cement in a mixing machine, sequentially adding the modified mixed powder into the mixing machine, pretreating modified vitrified micro bubbles, mixing nano powder, aluminum powder, sepiolite, graphite oxide, talcum powder, calcium stearate, sodium stearate and a dispersing agent, stirring and mixing for 5min at the temperature of 60 ℃ and the rotating speed of 1500r/min to obtain mixed slurry, transferring the mixed slurry into a mold, casting and molding to obtain a pretreated blank, precuring the pretreated blank at the temperature of 80 ℃ for 5h, demolding to obtain a blank, and autoclaved and curing the blank at the temperature of 220 ℃ and the pressure of 1.8MPa for 24h to obtain the pressure-resistant aerated brick. The porous ceramic is corundum porous ceramic. The preparation method of the saturated sodium carbonate solution comprises the steps of adding water into a beaker, heating until the water temperature in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution. The preparation method of the saturated sodium carbonate solution comprises the steps of adding water into a beaker, heating until the water temperature in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution. The paraffin is a paraffin mixture with the carbon number of 30. The curing agent is m-phenylenediamine. The preparation method of the mixed nano powder comprises the steps of crushing waste concrete and sieving the waste concrete with a 160-mesh sieve to obtain concrete powder, wherein nano titanium dioxide and nano silicon dioxide are mixed according to the mass ratio of 1: 3, mixing, adding concrete powder with the mass 6 times of that of the nano titanium dioxide, and stirring and mixing to obtain mixed nano powder. The dispersant is a dispersant MF.
Example 2
Mixing the vitrified micro bubbles with a 35% sodium hydroxide solution according to the mass ratio of 1: 5, mixing, soaking for 45min at room temperature, filtering to obtain pretreated vitrified micro bubbles, and mixing the pretreated vitrified micro bubbles with phenolic resin according to a mass ratio of 1: 6, mixing, adding a silane coupling agent with the mass being 0.3 times that of the pretreated vitrified micro bubbles into the mixture of the pretreated vitrified micro bubbles and the phenolic resin, stirring and mixing for 80min at the temperature of 75 ℃ and the rotating speed of 350r/min, and filtering to obtain modified vitrified micro bubbles; mixing the modified vitrified micro bubbles with paraffin according to the mass ratio of 1: 8, mixing, adding a curing agent with the mass of 0.12 time that of the modified vitrified micro bubbles and alumina with the mass of 0.3 time that of the modified vitrified micro bubbles into the mixture of the modified vitrified micro bubbles and paraffin, stirring and mixing for 40min under the conditions that the temperature is 70 ℃ and the rotating speed is 400r/min to obtain a vitrified micro bubble mixture, and freezing and crushing the vitrified micro bubble mixture to obtain pretreated modified vitrified micro bubbles; weighing 25 parts of fluorite slag powder, 18 parts of cement, 10 parts of gypsum, 12 parts of pretreated modified vitrified micro bubbles, 6 parts of mixed nano powder, 6 parts of aluminum powder, 5 parts of sepiolite, 3 parts of graphite oxide, 4 parts of talcum powder, 2 parts of calcium stearate, 2 parts of sodium stearate, 0.2 part of dispersing agent and 12 parts of water in sequence, transferring the fluorite slag powder into a calcining furnace, calcining for 5 hours at the temperature of 600 ℃ to obtain pretreated fluorite slag powder, mixing the pretreated fluorite slag powder with the gypsum in a stirring machine, adding water into the stirring machine, stirring and mixing for 4 minutes at the temperature of 65 ℃ and the rotating speed of 1000r/min to obtain pretreated mixed slurry, mixing the pretreated mixed slurry with the cement in a mixing machine, sequentially adding the pretreated vitrified micro bubbles into the mixing machine, mixing the nano modified powder, the aluminum powder and the sepiolite, graphite oxide, talcum powder, calcium stearate, sodium stearate and a dispersing agent are stirred and mixed for 5min at the temperature of 60 ℃ and the rotating speed of 1500r/min to obtain mixed slurry, the mixed slurry is moved into a mold and is cast and molded to obtain a pretreated blank, the pretreated blank is precured for 5h at the temperature of 80 ℃, the mold is removed to obtain a blank, and the blank is autoclaved and cured for 24h at the temperature of 220 ℃ and the pressure of 1.8MPa to obtain the anti-aerated brick. The porous ceramic is corundum porous ceramic. The preparation method of the saturated sodium carbonate solution comprises the steps of adding water into a beaker, heating until the water temperature in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution. The preparation method of the saturated sodium carbonate solution comprises the steps of adding water into a beaker, heating until the water temperature in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution. The paraffin is a paraffin mixture with the carbon number of 30. The curing agent is m-phenylenediamine. The preparation method of the mixed nano powder comprises the steps of crushing waste concrete and sieving the waste concrete with a 160-mesh sieve to obtain mixed concrete powder, wherein nano titanium dioxide and nano silicon dioxide are mixed according to the mass ratio of 1: 3, mixing, adding concrete powder with the mass 6 times of that of the nano titanium dioxide, and stirring and mixing to obtain mixed nano powder. The dispersant is a dispersant MF.
Example 3
Transferring zeolite into a pulverizer, pulverizing and sieving with a 200-mesh sieve to obtain zeolite powder, transferring the zeolite powder into a calcining furnace, carrying out high-temperature aerobic calcination for 75min at the temperature of 800 ℃ to obtain pretreated zeolite powder, transferring porous ceramic into the pulverizer to pulverize, sieving with a 180-mesh sieve to obtain porous ceramic powder, and mixing the pretreated zeolite powder and the porous ceramic powder according to the mass ratio of 4: 1, mixing the mixture in a stirrer, and stirring the mixture for 30min at the rotating speed of 300r/min to obtain mixed powder; mixing the mixed powder with a saturated sodium carbonate solution according to a mass ratio of 1: 10, mixing the mixture in a beaker, mixing and stirring the mixture for 20min at the temperature of 60 ℃ and the rotating speed of 380r/min, cooling the material in the beaker to 20 ℃, filtering the mixture to obtain a filter cake, transferring the filter cake into a drying box, drying the filter cake for 35min at the constant temperature of 80 ℃ to obtain pre-treated mixed powder, mixing the pre-treated mixed powder with a calcium hydroxide solution with the mass fraction of 10% according to the mass ratio of 1: 5, mixing the mixture in a flask, introducing carbon dioxide gas into the flask at the speed of 15ml/min, reacting for 60 min at the constant temperature of 2 ℃, filtering to obtain filter residue, and freeze-drying the filter residue to obtain modified mixed powder; mixing the vitrified micro beads with paraffin according to a mass ratio of 1: 8, mixing, adding a curing agent with the mass of 0.12 time that of the vitrified micro bubbles and alumina with the mass of 0.3 time that of the vitrified micro bubbles into the mixture of the vitrified micro bubbles and the paraffin, stirring and mixing for 40min under the conditions that the temperature is 70 ℃ and the rotating speed is 400r/min to obtain a vitrified micro bubble mixture, and freezing and crushing the vitrified micro bubble mixture to obtain pretreated vitrified micro bubbles; weighing 25 parts of fluorite slag powder, 18 parts of cement, 10 parts of gypsum, 10 parts of modified mixed powder, 12 parts of pretreated modified vitrified micro bubbles, 6 parts of mixed nano powder, 6 parts of aluminum powder, 5 parts of sepiolite, 3 parts of graphite oxide, 4 parts of talcum powder, 2 parts of calcium stearate, 2 parts of sodium stearate, 0.2 part of dispersing agent and 12 parts of water in sequence, transferring the fluorite slag powder into a calcining furnace, calcining for 5 hours at the temperature of 600 ℃ to obtain pretreated fluorite slag powder, mixing the pretreated fluorite slag powder with the gypsum in a stirring machine, adding the water into the stirring machine, stirring and mixing for 4 minutes at the temperature of 65 ℃ and the rotating speed of 1000r/min to obtain pretreated mixed slurry, mixing the pretreated mixed slurry with the cement in a mixing machine, sequentially adding the modified mixed powder into the mixing machine, pretreating modified vitrified micro bubbles, mixing nano powder, aluminum powder, sepiolite, graphite oxide, talcum powder, calcium stearate, sodium stearate and a dispersing agent, stirring and mixing for 5min at the temperature of 60 ℃ and the rotating speed of 1500r/min to obtain mixed slurry, transferring the mixed slurry into a mold, casting and molding to obtain a pretreated blank, precuring the pretreated blank at the temperature of 80 ℃ for 5h, demolding to obtain the blank, and autoclaved and curing the blank at the temperature of 220 ℃ and the pressure of 1.8MPa for 24h to obtain the pressure-resistant aerated brick. The porous ceramic is corundum porous ceramic. The preparation method of the saturated sodium carbonate solution comprises the steps of adding water into a beaker, heating until the water temperature in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution. The preparation method of the saturated sodium carbonate solution comprises the steps of adding water into a beaker, heating until the water temperature in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution. The paraffin is a paraffin mixture with the carbon number of 30. The curing agent is m-phenylenediamine. The preparation method of the mixed nano powder comprises the steps of crushing waste concrete and sieving the waste concrete with a 160-mesh sieve to obtain concrete powder, wherein nano titanium dioxide and nano silicon dioxide are mixed according to the mass ratio of 1: 3, mixing, adding concrete powder with the mass 6 times of that of the nano titanium dioxide, and stirring and mixing to obtain mixed nano powder. The dispersant is a dispersant MF.
Example 4
Transferring zeolite into a pulverizer, pulverizing and sieving with a 200-mesh sieve to obtain zeolite powder, transferring the zeolite powder into a calcining furnace, carrying out high-temperature aerobic calcination for 75min at the temperature of 800 ℃ to obtain pretreated zeolite powder, transferring porous ceramic into the pulverizer to pulverize, sieving with a 180-mesh sieve to obtain porous ceramic powder, and mixing the pretreated zeolite powder and the porous ceramic powder according to the mass ratio of 4: 1, mixing the mixture in a stirrer, and stirring the mixture for 30min at the rotating speed of 300r/min to obtain mixed powder; mixing the mixed powder with a saturated sodium carbonate solution according to a mass ratio of 1: 10, mixing the mixture in a beaker, mixing and stirring the mixture for 20min at the temperature of 60 ℃ and the rotating speed of 380r/min, cooling the material in the beaker to 20 ℃, filtering the mixture to obtain a filter cake, transferring the filter cake into a drying box, drying the filter cake for 35min at the constant temperature of 80 ℃ to obtain pre-treated mixed powder, mixing the pre-treated mixed powder with a calcium hydroxide solution with the mass fraction of 10% according to the mass ratio of 1: 5, mixing the mixture in a flask, introducing carbon dioxide gas into the flask at the speed of 15ml/min, reacting for 60 min at the constant temperature of 2 ℃, filtering to obtain filter residue, and freeze-drying the filter residue to obtain modified mixed powder; mixing the vitrified micro beads with 35% sodium hydroxide solution according to the mass ratio of 1: 5, mixing, soaking for 45min at room temperature, filtering to obtain pretreated vitrified micro bubbles, and mixing the pretreated vitrified micro bubbles with phenolic resin according to a mass ratio of 1: 6, mixing, adding a silane coupling agent with the mass being 0.3 times that of the pretreated vitrified micro bubbles into the mixture of the pretreated vitrified micro bubbles and the phenolic resin, stirring and mixing for 80min at the temperature of 75 ℃ and the rotating speed of 350r/min, and filtering to obtain modified vitrified micro bubbles; mixing the modified vitrified micro bubbles with paraffin according to the mass ratio of 1: 8, mixing, adding a curing agent with the mass 0.12 times that of the modified vitrified micro bubbles and alumina with the mass 0.3 times that of the modified vitrified micro bubbles into the mixture of the modified vitrified micro bubbles and paraffin, stirring and mixing for 40min under the conditions that the temperature is 70 ℃ and the rotating speed is 400r/min to obtain a vitrified micro bubble mixture, and freezing and crushing the vitrified micro bubble mixture to obtain pretreated modified vitrified micro bubbles; weighing 25 parts of fluorite slag powder, 18 parts of cement, 10 parts of gypsum, 10 parts of modified mixed powder, 12 parts of pretreated modified vitrified micro bubbles, 6 parts of mixed nano powder, 6 parts of aluminum powder, 3 parts of graphite oxide, 4 parts of talcum powder, 2 parts of calcium stearate, 2 parts of sodium stearate, 0.2 part of dispersing agent and 12 parts of water in sequence, transferring the fluorite slag powder into a calcining furnace, calcining for 5 hours at the temperature of 600 ℃ to obtain pretreated fluorite slag powder, mixing the pretreated fluorite slag powder with the gypsum in a stirring machine, adding water into the stirring machine, stirring and mixing for 4 minutes at the temperature of 65 ℃ and the rotating speed of 1000r/min to obtain pretreated mixed slurry, mixing the pretreated mixed slurry and the cement in a mixing machine, sequentially adding the modified mixed powder, the pretreated modified vitrified micro bubbles and the mixed nano powder into the mixing machine, the method comprises the steps of stirring and mixing aluminum powder, graphite oxide, talcum powder, calcium stearate, sodium stearate and a dispersing agent for 5min at the temperature of 60 ℃ and the rotating speed of 1500r/min to obtain mixed slurry, transferring the mixed slurry into a mold, casting and molding to obtain a pretreated blank, precuring the pretreated blank for 5h at the temperature of 80 ℃, demolding to obtain a blank, and performing autoclaved curing on the blank for 24h at the temperature of 220 ℃ and the pressure of 1.8MPa to obtain the anti-compression aerated brick. The porous ceramic is corundum porous ceramic. The preparation method of the saturated sodium carbonate solution comprises the steps of adding water into a beaker, heating until the water temperature in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution. The preparation method of the saturated sodium carbonate solution comprises the steps of adding water into a beaker, heating until the water temperature in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution. The paraffin is a paraffin mixture with the carbon number of 30. The curing agent is m-phenylenediamine. The preparation method of the mixed nano powder comprises the steps of crushing waste concrete and sieving the waste concrete with a 160-mesh sieve to obtain concrete powder, wherein nano titanium dioxide and nano silicon dioxide are mixed according to the mass ratio of 1: 3, mixing, adding concrete powder with the mass 6 times of that of the nano titanium dioxide, and stirring and mixing to obtain mixed nano powder. The dispersant is a dispersant MF.
Example 5
Transferring zeolite into a pulverizer, pulverizing and sieving with a 200-mesh sieve to obtain zeolite powder, transferring the zeolite powder into a calcining furnace, carrying out high-temperature aerobic calcination for 75min at the temperature of 800 ℃ to obtain pretreated zeolite powder, transferring porous ceramic into the pulverizer to pulverize, sieving with a 180-mesh sieve to obtain porous ceramic powder, and mixing the pretreated zeolite powder and the porous ceramic powder according to the mass ratio of 4: 1, mixing the mixture in a stirrer, and stirring the mixture for 30min at the rotating speed of 300r/min to obtain mixed powder; mixing the mixed powder with a saturated sodium carbonate solution according to a mass ratio of 1: 10, mixing the mixture in a beaker, mixing and stirring the mixture for 20min at the temperature of 60 ℃ and the rotating speed of 380r/min, cooling the material in the beaker to 20 ℃, filtering the mixture to obtain a filter cake, transferring the filter cake into a drying box, drying the filter cake for 35min at the constant temperature of 80 ℃ to obtain pre-treated mixed powder, mixing the pre-treated mixed powder with a calcium hydroxide solution with the mass fraction of 10% according to the mass ratio of 1: 5, mixing the mixture in a flask, introducing carbon dioxide gas into the flask at the speed of 15ml/min, reacting for 60 min at the constant temperature of 2 ℃, filtering to obtain filter residue, and freeze-drying the filter residue to obtain modified mixed powder; mixing the vitrified micro beads with 35% sodium hydroxide solution according to the mass ratio of 1: 5, mixing, soaking for 45min at room temperature, filtering to obtain pretreated vitrified micro bubbles, and mixing the pretreated vitrified micro bubbles with phenolic resin according to a mass ratio of 1: 6, mixing, adding a silane coupling agent with the mass being 0.3 times that of the pretreated vitrified micro bubbles into the mixture of the pretreated vitrified micro bubbles and the phenolic resin, stirring and mixing for 80min at the temperature of 75 ℃ and the rotating speed of 350r/min, and filtering to obtain modified vitrified micro bubbles; mixing the modified vitrified micro bubbles with paraffin according to the mass ratio of 1: 8, mixing, adding a curing agent with the mass 0.12 times that of the modified vitrified micro bubbles and alumina with the mass 0.3 times that of the modified vitrified micro bubbles into the mixture of the modified vitrified micro bubbles and paraffin, stirring and mixing for 40min under the conditions that the temperature is 70 ℃ and the rotating speed is 400r/min to obtain a vitrified micro bubble mixture, and freezing and crushing the vitrified micro bubble mixture to obtain pretreated modified vitrified micro bubbles; weighing 25 parts of fluorite slag powder, 18 parts of cement, 10 parts of gypsum, 10 parts of modified mixed powder, 12 parts of pretreated modified vitrified micro bubbles, 6 parts of mixed nano powder, 6 parts of aluminum powder, 5 parts of sepiolite, 2 parts of calcium stearate, 2 parts of sodium stearate, 0.2 part of dispersing agent and 12 parts of water in turn, transferring the fluorite slag powder into a calcining furnace, calcining for 5 hours at the temperature of 600 ℃ to obtain pretreated fluorite slag powder, mixing the pretreated fluorite slag powder gypsum in a stirring machine, adding water into the stirring machine, stirring and mixing for 4 minutes at the temperature of 65 ℃ and the rotating speed of 1000r/min to obtain pretreated mixed slurry, mixing the pretreated mixed slurry and the cement in a mixing machine, adding the modified mixed powder, the pretreated vitrified micro bubbles, the mixed nano powder and the aluminum powder in turn, mixing sepiolite, calcium stearate, sodium stearate and a dispersing agent at 60 ℃ and 1500r/min for 5min to obtain mixed slurry, transferring the mixed slurry into a mold, casting and molding to obtain a pretreated blank, pre-curing the pretreated blank at 80 ℃ for 5h, demolding to obtain a blank, and performing autoclaved curing on the blank at 220 ℃ and 1.8MPa for 24h to obtain the anti-compression aerated brick. The porous ceramic is corundum porous ceramic. The preparation method of the saturated sodium carbonate solution comprises the steps of adding water into a beaker, heating until the water temperature in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution. The preparation method of the saturated sodium carbonate solution comprises the steps of adding water into a beaker, heating until the water temperature in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution. The paraffin is a paraffin mixture with the carbon number of 30. The curing agent is m-phenylenediamine. The preparation method of the mixed nano powder comprises the steps of crushing waste concrete and sieving the waste concrete with a 160-mesh sieve to obtain concrete powder, wherein nano titanium dioxide and nano silicon dioxide are mixed according to the mass ratio of 1: 3, mixing, adding concrete powder with the mass 6 times of that of the nano titanium dioxide, and stirring and mixing to obtain mixed nano powder. The dispersant is a dispersant MF.
Comparative example: an aerated brick produced by a new building material company Limited of Jining.
The performance of the aerated bricks obtained in examples 1 to 5 and the comparative products was tested, and the specific test results are shown in table 1:
TABLE 1
| Detecting content | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example |
| Compressive strength/MPa | 7.7 | 5.6 | 5.9 | 6.1 | 5.4 | 3.5 |
The detection results in the table 1 show that the compression-resistant aerated brick provided by the invention has excellent compression resistance.
Claims (7)
1. A preparation method of a compression-resistant aerated brick is characterized by comprising the following specific preparation steps:
(1) zeolite is crushed and sieved to obtain zeolite powder, the zeolite powder is aerobically calcined at high temperature to obtain pretreated zeolite powder, porous ceramic is crushed and sieved to obtain porous ceramic powder, and the mass ratio of the pretreated zeolite powder to the porous ceramic powder is 3: 1-4: 1, mixing and stirring to obtain mixed powder;
(2) mixing the mixed powder with a saturated sodium carbonate solution according to a mass ratio of 1: 5-1: 10, mixing, cooling, filtering and drying to obtain pre-treatment mixed powder, wherein the pre-treatment mixed powder and a calcium hydroxide solution are mixed according to a mass ratio of 1: 3-1: 5, mixing, introducing carbon dioxide gas, filtering, and freeze-drying to obtain modified mixed powder;
(3) mixing the vitrified micro bubbles with a sodium hydroxide solution according to a mass ratio of 1: 3-1: 5, mixing, soaking at room temperature, filtering to obtain pretreated vitrified micro bubbles, and mixing the pretreated vitrified micro bubbles with the phenolic resin according to a mass ratio of 1: 4-1: 6, mixing, adding a silane coupling agent with the mass of 0.2-0.3 times that of the pretreated vitrified micro bubbles, stirring and mixing, and filtering to obtain modified vitrified micro bubbles;
(4) mixing the modified vitrified micro bubbles with paraffin according to the mass ratio of 1: 6-1: 8, mixing and soaking, adding a curing agent with the mass of 0.10-0.12 time that of the modified paraffin and alumina with the mass of 0.2-0.3 time that of the modified paraffin, stirring and mixing, and freezing and crushing to obtain pretreated modified vitrified micro bubbles;
(5) weighing 20-25 parts of fluorite slag powder, 15-18 parts of cement, 8-10 parts of gypsum, 5-10 parts of modified mixed powder, 8-12 parts of pretreated modified vitrified micro bubbles, 4-6 parts of mixed nano powder, 4-6 parts of aluminum powder, 3-5 parts of sepiolite, 2-3 parts of graphite oxide, 2-4 parts of talcum powder, 1-2 parts of calcium stearate, 1-2 parts of sodium stearate, 0.1-0.2 part of dispersing agent and 5-12 parts of water in sequence, calcining the fluorite slag powder to obtain pretreated fluorite slag powder, mixing the pretreated fluorite slag powder with the gypsum, adding water, stirring and mixing to obtain pretreated mixed slurry, mixing the pretreated mixed slurry with the cement, and sequentially adding the modified mixed powder, the pretreated modified vitrified micro bubbles, the mixed nano powder, the aluminum powder, the sepiolite, the graphite oxide, the talcum powder, the calcium stearate, the sodium stearate and the dispersing agent, stirring and mixing to obtain mixed slurry, casting and molding the mixed slurry to obtain a pretreated blank, pre-curing the pretreated blank, demolding to obtain a blank, and performing autoclaved curing on the blank to obtain the anti-compression aerated brick; the preparation method of the mixed nano powder comprises the steps of crushing waste concrete and sieving the waste concrete by a sieve of 80-160 meshes to obtain concrete powder, wherein the mass ratio of nano titanium dioxide to nano silicon dioxide is 1: 2-1: 3, mixing, adding concrete powder which is 5-6 times of the mass of the nano titanium dioxide, and stirring and mixing to obtain mixed nano powder.
2. The preparation method of the pressure-resistant aerated brick according to claim 1, which is characterized by comprising the following steps: the porous ceramic in the step (1) is any one of corundum material porous ceramic, aluminosilicate material porous ceramic or cordierite material porous ceramic.
3. The preparation method of the pressure-resistant aerated brick according to claim 1, which is characterized by comprising the following steps: and (3) adding water into a beaker, heating until the temperature of the water in the beaker is 60 ℃, adding sodium carbonate into the beaker until crystals are separated out, and filtering to obtain the saturated sodium carbonate solution.
4. The preparation method of the pressure-resistant aerated brick according to claim 1, which is characterized by comprising the following steps: the silane coupling agent in the step (3) is any one of a silane coupling agent KH-550, a silane coupling agent KH-560 or a silane coupling agent KH-570.
5. The preparation method of the pressure-resistant aerated brick according to claim 1, which is characterized by comprising the following steps: and (4) the paraffin is a paraffin mixture with the carbon number of 24-30.
6. The preparation method of the pressure-resistant aerated brick according to claim 1, which is characterized by comprising the following steps: and (4) the curing agent is any one of m-phenylenediamine, vinyl triamine or ethylene diamine.
7. The preparation method of the pressure-resistant aerated brick according to claim 1, which is characterized by comprising the following steps: the dispersant in the step (5) is any one of dispersant MF, dispersant NNO or dispersant 5040.
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| CN114751709A (en) * | 2022-04-14 | 2022-07-15 | 贵州理工学院 | Phosphogypsum-based light baking-free antique brick carving and preparation method thereof |
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Denomination of invention: Preparation method of a compression type aerated brick Effective date of registration: 20221216 Granted publication date: 20201020 Pledgee: Zhejiang Shengzhou Rural Commercial Bank Co.,Ltd. Jintang sub branch Pledgor: Shengzhou pinglong new wall building materials Co.,Ltd. Registration number: Y2022330003700 |