CN111205032A - Light-weight heat-preservation concrete material and preparation method thereof - Google Patents
Light-weight heat-preservation concrete material 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
- B28B1/045—Producing shaped prefabricated articles from the material by tamping or ramming combined with vibrating or jolting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
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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
- 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
- C04B28/08—Slag 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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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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Abstract
The invention provides a light heat-preservation concrete material and a preparation method thereof, wherein the preparation method of the light heat-preservation concrete material comprises the following specific steps: adding 0.1-0.2 part of manganese dioxide into 1 part of 30-40% hydrogen peroxide by weight, stirring while adding the prefabricated slurry, uniformly stirring, vibrating for forming, and maintaining to obtain the light heat-preservation concrete material. The invention decomposes hydrogen peroxide to generate gas through the catalytic action of manganese dioxide, so that tiny pores are uniformly formed in the concrete, the concrete is light in weight and heat-insulating, and meanwhile, through the adjustment of slurry components and the formation of polyaniline in the preparation process, a three-dimensional network structure is formed in a cement gel network, so that the strength of the concrete is improved, the requirement of high strength of buildings can be met, and the application prospect is wide.
Description
Technical Field
The invention belongs to the technical field of new concrete materials, and particularly relates to a light-weight heat-preservation concrete material and a preparation method thereof.
Background
Concrete is widely used in the construction field as a main building material. At present, more than 90% of buildings at home and abroad with high buildings and high buildings are reinforced concrete structures, and the enclosure structures of a few steel structure buildings, including outer walls and building (house) covers, are also mainly built by concrete materials. However, the heat insulation performance of concrete is poor, the heat conductivity coefficient is about 1.7W/(m.K), the concrete does not meet the energy-saving requirement of the country on house buildings, and the requirements of relevant specifications can be met only by making heat insulation layers on the outer surface or the inner surface of a wall body.
However, compared with the heat insulating material used for the inner and outer heat insulating layers, the heat conductivity coefficient of concrete is very high, so that the temperature inside the building can be ensured only by adding the inner and outer heat insulating layers to be very thick. This not only results in an increase in construction costs, but also is not conducive to structural stress and safety in construction and use. In addition, the heat insulation material does not have a fireproof function generally, the fireproof isolation belt which needs to be arranged is installed by field secondary construction generally, the formed heat insulation wall has the problems of complex construction, easy cracking, water seepage, falling-off and other quality safety problems of the heat insulation layer, and the same service life of the heat insulation and the structure of the building is difficult to realize. Therefore, the method has great significance in the research of heat preservation of concrete.
In recent years, aerated concrete has attracted attention, has the advantages of light volume weight, high heat preservation performance, good sound absorption effect and the like, and is excellent light-weight heat preservation type concrete. The aerated concrete is a light porous silicate product prepared by taking siliceous materials (sand, fly ash, siliceous tailings and the like) and calcareous materials (lime, cement) as main raw materials, adding a gas former (aluminum powder) and carrying out the processes of proportioning, stirring, pouring, pre-curing, cutting, autoclaving, curing and the like, and is named as aerated concrete because the aerated concrete contains a large amount of uniform and fine pores after gas generation.
Patent application CN108203312A discloses a light foaming concrete, including solid component and plus component two parts, wherein, the solid component comprises portland cement and fly ash, plus component comprises melamine water-reducing agent, the accelerant and compound foamer (foaming component, foam stabilizing auxiliary agent and auxiliary agent etc.), the density of the foaming concrete who makes descends, but the foaming process is more crude, quick, can form a large amount of bigger holes, seriously influence the intensity of concrete, can't satisfy the high standard requirement of building.
Disclosure of Invention
The invention aims to provide a light-weight heat-preservation concrete material and a preparation method thereof.
In order to achieve the purpose, the invention is realized by the following scheme:
the preparation method of the light heat preservation type concrete material comprises the following steps of adding 0.1-0.2 part of manganese dioxide into 1 part of 30-40% hydrogen peroxide by weight, adding prefabricated slurry while stirring, uniformly stirring, vibrating for forming and maintaining to obtain the light heat preservation type concrete material;
the prefabricated slurry comprises slurry A, slurry B and slurry C, the slurry A is added during feeding, the slurry A is uniformly stirred, the slurry B is added while stirring, and the slurry C is added immediately after the slurry B is fed; the slurry A is prepared by the following method: adding 0.02-0.03 part of petroleum coke powder and 0.05-0.06 part of coal ash into 0.1-0.15 part of water, carrying out ball milling, then adding a mixture of 0.15-0.22 part of cement and 0.2-0.25 part of sand, uniformly stirring, continuously adding 0.21-0.24 part of light aggregate, 0.001-0.002 part of additive and 0.0002-0.0003 part of ammonium persulfate, and uniformly stirring to obtain the slurry B, wherein the slurry B is 0.08-0.11 part of aniline hydrochloric acid solution, and the slurry C is an aqueous dispersion of 0.1-0.15 part of petroleum coke powder.
Preferably, the vibration forming comprises 2-3 times, and the vibration time is 5-8 s each time. When the vibration time is too short, larger bubbles can remain, the interior of the concrete is not compact, and the strength of the concrete is reduced; the uniform bubbles formed inside can be damaged after the vibration time is too long, the self weight is large, and the heat preservation performance is poor.
Preferably, the curing conditions are as follows: and maintaining for 20-22 days under the conditions of normal temperature and normal pressure and relative humidity of 95% RH. The normal temperature of the invention is defined as 20 ℃ according to the domestic common engineering temperature; atmospheric pressure means 101.325 kPa.
Preferably, the petroleum coke powder and the fly ash are both subjected to modification treatment, and the specific method of the modification treatment comprises the following steps in parts by weight: dispersing 1 part of petroleum coke powder or fly ash in 1-1.2 parts of water, then adding 0.02-0.04 part of hydroxypropyl methyl cellulose and 0.1-0.2 part of palmitic acid ethanol solution, heating and ultrasonically treating, filtering, drying and crushing to obtain the finished product. The modified cement can promote the uniform mixing with the components such as cement and the like, and the strength of the product is ensured.
More preferably, the palmitic acid ethanol solution is prepared by adding 1 part of palmitic acid into 5-6 parts of absolute ethanol and slowly heating until the palmitic acid is completely dissolved.
Further preferably, the process conditions of the heating ultrasonic treatment are as follows: and (3) carrying out ultrasonic treatment for 20-30 minutes at 40-50 kHz under the condition of 50-60 ℃.
Preferably, the cement is selected from any one of ordinary portland cement, portland slag cement, portland fly ash cement, or portland pozzolanic cement.
Preferably, the lightweight aggregate comprises two parts of fine lightweight aggregate and coarse lightweight aggregate, and the two parts are respectively prepared from expanded vermiculite, coal cinder, coal gangue, kaolin and aluminum slag according to the mass ratio of 1: 3-4: 8-10: 15-20: 10-12, and pulverizing, wherein the former is pulverized to 0.22-0.88 mm, and the latter is pulverized to 5-8 mm; the mass ratio of the fine lightweight aggregate to the coarse lightweight aggregate is 1: 1.2 to 1.3.
Further preferably, the compounding method comprises the following specific steps: the method comprises the steps of crushing coal cinder, aluminum slag and coal gangue, uniformly mixing the crushed coal cinder, aluminum slag and coal gangue with expanded vermiculite and kaolin, adding water which is 0.1-0.2 times of the total weight of the crushed coal cinder, aluminum slag and coal gangue, granulating, drying for 2-3 hours at 100-110 ℃, heating to 800-1000 ℃, roasting for 20-30 minutes, and cooling to room temperature.
Preferably, the additive is one of sodium lignosulfonate, a TH-928 polycarboxylic acid water reducing agent or a YZ-1 naphthalene high-efficiency water reducing agent, portland cement clinker and triethanolamine in a mass ratio of 1: 2-3: 1.5-2. The admixture of the invention is helpful to ensure the strength of concrete.
Preferably, the B slurry is prepared by mixing aniline and 2mol/L hydrochloric acid solution in a volume ratio of 1: 5-6, and uniformly stirring to obtain the mixture; the slurry C is obtained by adding petroleum coke powder into water 8-10 times of the weight of the petroleum coke powder and performing ultrasonic oscillation for 30-40 minutes.
The invention also claims a light-weight heat-preservation concrete material prepared by the method.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention decomposes hydrogen peroxide to generate gas through the catalytic action of manganese dioxide, so that tiny pores are uniformly formed in the concrete, the concrete is light in weight and heat-insulating, and meanwhile, a three-dimensional network structure is formed in a cement gel network through the adjustment of slurry components and the formation of polyaniline in the preparation process, so that the strength of the concrete is improved, and the requirement of high strength of buildings is met.
(2) The prefabricated slurry comprises slurry A, slurry B and slurry C, wherein the slurry A is added and uniformly stirred when the slurry is fed, the slurry B is added while stirring, and the slurry C is added immediately after the slurry B is fed; the slurry A is prepared by mixing petroleum coke powder, fly ash, cement, sand, light aggregate, an additive, ammonium persulfate and the like, the slurry B is a hydrochloric acid solution of aniline, and the slurry C is a water dispersion liquid of the petroleum coke powder. The slurry A is added to generate cement gelation, then the slurry B is added, the hydrogen peroxide decomposition speed is high under the strong acid condition, a large amount of bubbles are generated, the gelation product of the slurry A is further expanded along with the formation of the bubbles, the hydrogen peroxide is decomposed into water along with the addition of the slurry C, the acid concentration is reduced, the hydrogen peroxide is relatively stable under the relatively weak acid condition, the decomposition of the hydrogen peroxide is inhibited, and the formation speed of the bubbles is controlled, so that a large amount of large bubbles are not formed, and the strength of concrete is further influenced.
(3) After the slurry B is added in the preparation method, under the strong acid condition, aniline is subjected to polymerization reaction to generate polyaniline, the polyaniline is inserted in the gel structure, the strength of the concrete is greatly enhanced, on the other hand, new micro pores are formed in the insertion process, the microstructure is further improved, air circulation is effectively blocked, and the heat preservation effect is achieved.
(4) The petroleum coke powder and the fly ash have porous structures, are uniformly dispersed in the gelling process, are favorable for reducing the dead weight, block air circulation and play a role in heat preservation; the slurry C contains petroleum coke powder, has good compatibility with a pre-gelled product (also contains petroleum coke powder), and drives water to quickly diffuse in the quick compatibility process so as to reduce the concentration of acid in the system and effectively control uniform and slow generation of bubbles.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
Example 1
A preparation method of a light-weight heat-preservation concrete material comprises the following steps: adding 0.1kg of manganese dioxide into 1kg of hydrogen peroxide with the mass concentration of 30%, adding the prefabricated slurry while stirring, uniformly stirring, vibrating, forming and curing to obtain the light-weight heat-preservation concrete material;
the prefabricated slurry comprises slurry A, slurry B and slurry C, the slurry A is added during feeding, the slurry A is uniformly stirred, the slurry B is added while stirring, and the slurry C is added immediately after the slurry B is fed; the slurry A is prepared by the following method: adding 0.02kg of petroleum coke powder and 0.05kg of fly ash into 0.1kg of water, carrying out ball milling, then adding a mixture of 0.15kg of cement and 0.2kg of sand, uniformly stirring, continuously adding 0.21kg of lightweight aggregate, 0.001kg of additive and 0.0002kg of ammonium persulfate, and uniformly stirring to obtain the slurry B, wherein the slurry B is 0.08kg of aniline hydrochloric acid solution, and the slurry C is 0.1kg of water dispersion of petroleum coke powder.
The vibration molding comprises 2 times, and the vibration time is 5s each time.
The maintenance conditions are as follows: maintaining for 20 days under the conditions of normal temperature and pressure and relative humidity of 95 percent RH.
The petroleum coke powder and the fly ash are both subjected to modification treatment, and the specific method of the modification treatment comprises the following steps: dispersing 1kg of petroleum coke powder or fly ash in 1kg of water, adding 0.02kg of hydroxypropyl methyl cellulose and 0.1kg of palmitic acid ethanol solution, carrying out ultrasonic treatment for 20 minutes at 40kHz under the condition of 50 ℃, filtering, drying and crushing to obtain the finished product. The palmitic acid ethanol solution is prepared by adding 1kg of palmitic acid into 5kg of anhydrous ethanol, and slowly heating until the palmitic acid is completely dissolved.
The cement is ordinary portland cement.
The light aggregate comprises a fine light aggregate and a coarse light aggregate, and is prepared from expanded vermiculite, coal cinder, coal gangue, kaolin and aluminum slag according to the mass ratio of 1: 3: 8: 15: 10, the former is crushed to 0.22mm, and the latter is crushed to 5 mm; the mass ratio of the fine lightweight aggregate to the coarse lightweight aggregate is 1: 1.2.
the specific method for compounding comprises the following steps: the coal cinder, the aluminum slag and the coal gangue are crushed and then uniformly mixed with the expanded vermiculite and the kaolin, water which is 0.1 time of the total weight of the crushed coal cinder, the crushed aluminum slag and the coal gangue is added, the mixture is granulated, dried for 2 hours at the temperature of 100 ℃, then the mixture is heated to 800 ℃ and roasted for 20 minutes, and the mixture is cooled to the room temperature.
The additive is prepared from sodium lignosulfonate, silicate cement clinker and triethanolamine according to a mass ratio of 1: 2: 1.5 mixing to obtain the product.
And the slurry B is prepared by mixing aniline and 2mol/L hydrochloric acid solution in a volume ratio of 1: 5 mixing and stirring uniformly to obtain the product; the slurry C is obtained by adding petroleum coke powder into water with the weight 8 times that of the petroleum coke powder and carrying out ultrasonic oscillation for 30 minutes.
Example 2
A preparation method of a light-weight heat-preservation concrete material comprises the following steps: adding 0.2kg of manganese dioxide into 1kg of hydrogen peroxide with the mass concentration of 40%, adding the prefabricated slurry while stirring, uniformly stirring, vibrating, forming and curing to obtain the light-weight heat-preservation concrete material;
the prefabricated slurry comprises slurry A, slurry B and slurry C, the slurry A is added during feeding, the slurry A is uniformly stirred, the slurry B is added while stirring, and the slurry C is added immediately after the slurry B is fed; the slurry A is prepared by the following method: adding 0.03kg of petroleum coke powder and 0.06kg of fly ash into 0.15kg of water, carrying out ball milling, then adding a mixture of 0.22kg of cement and 0.25kg of sand, uniformly stirring, continuously adding 0.24kg of lightweight aggregate, 0.002kg of additive and 0.0003kg of ammonium persulfate, and uniformly stirring to obtain the slurry B, wherein the slurry B is 0.11kg of aniline hydrochloric acid solution, and the slurry C is 0.15kg of water dispersion of petroleum coke powder.
The vibration molding comprises 3 times, and each vibration time is 8 s.
The maintenance conditions are as follows: curing for 22 days under the conditions of normal temperature and pressure and relative humidity of 95 percent RH.
The petroleum coke powder and the fly ash are both subjected to modification treatment, and the specific method of the modification treatment comprises the following steps: dispersing 1kg of petroleum coke powder or fly ash in 1.2kg of water, adding 0.04kg of hydroxypropyl methyl cellulose and 0.2kg of palmitic acid ethanol solution, carrying out ultrasonic treatment for 30 minutes at 50kHz under the condition of 60 ℃, filtering, drying and crushing to obtain the finished product. The palmitic acid ethanol solution is prepared by adding 1kg of palmitic acid into 6kg of anhydrous ethanol, and slowly heating until the palmitic acid is completely dissolved.
The cement is slag portland cement.
The light aggregate comprises a fine light aggregate and a coarse light aggregate, and is prepared from expanded vermiculite, coal cinder, coal gangue, kaolin and aluminum slag according to the mass ratio of 1: 4: 10: 20: 12, pulverizing the mixture into 0.88mm powder and pulverizing the mixture into 8mm powder; the mass ratio of the fine lightweight aggregate to the coarse lightweight aggregate is 1: 1.3.
the specific method for compounding comprises the following steps: the coal cinder, the aluminum slag and the coal gangue are crushed and then uniformly mixed with the expanded vermiculite and the kaolin, water which is 0.2 time of the total weight of the crushed coal cinder, the crushed aluminum slag and the coal gangue is added, the mixture is granulated, dried for 3 hours at the temperature of 110 ℃, then the mixture is heated to 1000 ℃, roasted for 30 minutes and cooled to the room temperature.
The additive is prepared from a TH-928 polycarboxylic acid water reducer, a silicate cement clinker and triethanolamine according to a mass ratio of 1: 3: 2, mixing to obtain the product.
And the slurry B is prepared by mixing aniline and 2mol/L hydrochloric acid solution in a volume ratio of 1: 6 mixing and stirring uniformly to obtain the product; the slurry C is obtained by adding petroleum coke powder into water with the weight being 10 times that of the petroleum coke powder and carrying out ultrasonic oscillation for 40 minutes.
Example 3
A preparation method of a light-weight heat-preservation concrete material comprises the following steps: adding 0.2kg of manganese dioxide into 1kg of hydrogen peroxide with the mass concentration of 30%, adding the prefabricated slurry while stirring, uniformly stirring, vibrating, forming and curing to obtain the light-weight heat-preservation concrete material;
the prefabricated slurry comprises slurry A, slurry B and slurry C, the slurry A is added during feeding, the slurry A is uniformly stirred, the slurry B is added while stirring, and the slurry C is added immediately after the slurry B is fed; the slurry A is prepared by the following method: adding 0.02kg of petroleum coke powder and 0.06kg of fly ash into 0.1kg of water, carrying out ball milling, then adding a mixture of 0.22kg of cement and 0.2kg of sand, uniformly stirring, continuously adding 0.24kg of lightweight aggregate, 0.001kg of additive and 0.0003kg of ammonium persulfate, and uniformly stirring to obtain the slurry B, wherein the slurry B is 0.08kg of aniline hydrochloric acid solution, and the slurry C is 0.15kg of water dispersion of petroleum coke powder.
The vibration molding comprises 2 times, and the vibration time is 8s each time.
The maintenance conditions are as follows: maintaining for 20 days under the conditions of normal temperature and pressure and relative humidity of 95 percent RH.
The petroleum coke powder and the fly ash are both subjected to modification treatment, and the specific method of the modification treatment comprises the following steps: dispersing 1kg of petroleum coke powder or fly ash in 1.2kg of water, adding 0.02kg of hydroxypropyl methyl cellulose and 0.2kg of palmitic acid ethanol solution, carrying out ultrasonic treatment at 50 ℃ and 50kHz for 20 minutes, filtering, drying and crushing to obtain the finished product. The palmitic acid ethanol solution is prepared by adding 1kg of palmitic acid into 6kg of anhydrous ethanol, and slowly heating until the palmitic acid is completely dissolved.
The cement is fly ash portland cement.
The light aggregate comprises a fine light aggregate and a coarse light aggregate, and is prepared from expanded vermiculite, coal cinder, coal gangue, kaolin and aluminum slag according to the mass ratio of 1: 3: 10: 15: 12, pulverizing the mixture into 0.22mm powder and 8mm powder; the mass ratio of the fine lightweight aggregate to the coarse lightweight aggregate is 1: 1.2.
the specific method for compounding comprises the following steps: the coal cinder, the aluminum slag and the coal gangue are crushed and then uniformly mixed with the expanded vermiculite and the kaolin, water which is 0.2 time of the total weight of the crushed coal cinder, the crushed aluminum slag and the coal gangue is added, the mixture is granulated and dried for 3 hours at the temperature of 100 ℃, then the mixture is heated to 800 ℃ for roasting for 30 minutes, and the mixture is cooled to the room temperature.
The additive is a YZ-1 naphthalene high-efficiency water reducing agent, portland cement clinker and triethanolamine according to the mass ratio of 1: 2: 2, mixing to obtain the product.
And the slurry B is prepared by mixing aniline and 2mol/L hydrochloric acid solution in a volume ratio of 1: 5 mixing and stirring uniformly to obtain the product; the slurry C is obtained by adding petroleum coke powder into water with the weight being 10 times that of the petroleum coke powder and carrying out ultrasonic oscillation for 30 minutes.
Example 4
A preparation method of a light-weight heat-preservation concrete material comprises the following steps: adding 0.1kg of manganese dioxide into 1kg of hydrogen peroxide with the mass concentration of 40%, adding the prefabricated slurry while stirring, uniformly stirring, vibrating, forming and curing to obtain the light-weight heat-preservation concrete material;
the prefabricated slurry comprises slurry A, slurry B and slurry C, the slurry A is added during feeding, the slurry A is uniformly stirred, the slurry B is added while stirring, and the slurry C is added immediately after the slurry B is fed; the slurry A is prepared by the following method: adding 0.03kg of petroleum coke powder and 0.05kg of fly ash into 0.15kg of water, carrying out ball milling, then adding a mixture of 0.15kg of cement and 0.25kg of sand, uniformly stirring, continuously adding 0.21kg of lightweight aggregate, 0.002kg of additive and 0.0002kg of ammonium persulfate, and uniformly stirring to obtain the slurry B, wherein the slurry B is 0.11kg of aniline hydrochloric acid solution, and the slurry C is 0.1kg of water dispersion of petroleum coke powder.
The vibration molding comprises 3 times, and the vibration time is 5s each time.
The maintenance conditions are as follows: curing for 22 days under the conditions of normal temperature and pressure and relative humidity of 95 percent RH.
The petroleum coke powder and the fly ash are both subjected to modification treatment, and the specific method of the modification treatment comprises the following steps: dispersing 1kg of petroleum coke powder or fly ash in 1kg of water, adding 0.04kg of hydroxypropyl methyl cellulose and 0.1kg of palmitic acid ethanol solution, carrying out ultrasonic treatment for 30 minutes at 40kHz under the condition of 60 ℃, filtering, drying and crushing to obtain the finished product. The palmitic acid ethanol solution is prepared by adding 1kg of palmitic acid into 5kg of anhydrous ethanol, and slowly heating until the palmitic acid is completely dissolved.
The cement is pozzolanic portland cement.
The light aggregate comprises a fine light aggregate and a coarse light aggregate, and is prepared from expanded vermiculite, coal cinder, coal gangue, kaolin and aluminum slag according to the mass ratio of 1: 4: 8: 20: 10, the former is crushed to 0.88mm, the latter is crushed to 5 mm; the mass ratio of the fine lightweight aggregate to the coarse lightweight aggregate is 1: 1.3.
the specific method for compounding comprises the following steps: the coal cinder, the aluminum slag and the coal gangue are crushed and then uniformly mixed with the expanded vermiculite and the kaolin, water which is 0.1 time of the total weight of the crushed coal cinder, the crushed aluminum slag and the coal gangue is added, the mixture is granulated, dried for 2 hours at the temperature of 110 ℃, then the mixture is heated to 1000 ℃, roasted for 20 minutes and cooled to the room temperature.
The additive is prepared from sodium lignosulfonate, silicate cement clinker and triethanolamine according to a mass ratio of 1: 3: 1.5 mixing to obtain the product.
And the slurry B is prepared by mixing aniline and 2mol/L hydrochloric acid solution in a volume ratio of 1: 6 mixing and stirring uniformly to obtain the product; the C slurry is obtained by adding petroleum coke powder into water with the weight 8 times that of the petroleum coke powder and carrying out ultrasonic oscillation for 40 minutes.
Example 5
A preparation method of a light-weight heat-preservation concrete material comprises the following steps: adding 0.15kg of manganese dioxide into 1kg of hydrogen peroxide with the mass concentration of 35%, adding the prefabricated slurry while stirring, uniformly stirring, vibrating for forming, and curing to obtain the light-weight heat-preservation concrete material;
the prefabricated slurry comprises slurry A, slurry B and slurry C, the slurry A is added during feeding, the slurry A is uniformly stirred, the slurry B is added while stirring, and the slurry C is added immediately after the slurry B is fed; the slurry A is prepared by the following method: firstly adding 0.025kg of petroleum coke powder and 0.055kg of fly ash into 0.12kg of water, carrying out ball milling, then adding a mixture of 0.2kg of cement and 0.22kg of sand, uniformly stirring, continuously adding 0.23kg of light aggregate, 0.0015kg of additive and 0.00025kg of ammonium persulfate, and uniformly stirring to obtain the slurry B, wherein the slurry B is 0.1kg of hydrochloric acid solution of aniline, and the slurry C is water dispersion of 0.12kg of petroleum coke powder.
The vibration molding comprises 2 times, and the vibration time is 6s each time.
The maintenance conditions are as follows: curing for 21 days under the conditions of normal temperature and pressure and relative humidity of 95% RH.
The petroleum coke powder and the fly ash are both subjected to modification treatment, and the specific method of the modification treatment comprises the following steps: dispersing 1kg of petroleum coke powder or fly ash in 1.1kg of water, then adding 0.03kg of hydroxypropyl methyl cellulose and 0.15kg of palmitic acid ethanol solution, carrying out ultrasonic treatment for 25 minutes at 45kHz under the condition of 55 ℃, filtering, drying and crushing to obtain the finished product. The palmitic acid ethanol solution is prepared by adding 1kg of palmitic acid into 5.5kg of anhydrous ethanol, and slowly heating until the palmitic acid is completely dissolved.
The cement is fly ash portland cement.
The light aggregate comprises a fine light aggregate and a coarse light aggregate, and is prepared from expanded vermiculite, coal cinder, coal gangue, kaolin and aluminum slag according to the mass ratio of 1: 3.5: 9: 18: 11, the former is crushed to 0.5mm, and the latter is crushed to 7 mm; the mass ratio of the fine lightweight aggregate to the coarse lightweight aggregate is 1: 1.25.
the specific method for compounding comprises the following steps: the coal cinder, the aluminum slag and the coal gangue are crushed and then uniformly mixed with the expanded vermiculite and the kaolin, water which is 0.15 time of the total weight of the crushed coal cinder, the crushed aluminum slag and the coal gangue is added, the mixture is granulated and dried for 2.5 hours at 105 ℃, then the mixture is heated to 900 ℃ and roasted for 25 minutes, and the mixture is cooled to room temperature.
The additive is a YZ-1 naphthalene high-efficiency water reducing agent, portland cement clinker and triethanolamine according to the mass ratio of 1: 2.5: 1.8 mixing to obtain the product.
And the slurry B is prepared by mixing aniline and 2mol/L hydrochloric acid solution in a volume ratio of 1: 5.5 mixing and stirring evenly to obtain the product; the slurry C is obtained by adding petroleum coke powder into water 9 times the weight of the petroleum coke powder and performing ultrasonic oscillation for 35 minutes.
Comparative example 1
A preparation method of a light-weight heat-preservation concrete material comprises the following steps: adding 0.1kg of manganese dioxide into 1kg of hydrogen peroxide with the mass concentration of 30%, adding the prefabricated slurry while stirring, uniformly stirring, vibrating, forming and curing to obtain the light-weight heat-preservation concrete material;
the prefabricated slurry comprises three parts, namely slurry A, slurry B and slurry C, wherein the slurry A, the slurry B and the slurry C are fed simultaneously; the slurry A is prepared by the following method: adding 0.02kg of petroleum coke powder and 0.05kg of fly ash into 0.1kg of water, carrying out ball milling, then adding a mixture of 0.15kg of cement and 0.2kg of sand, uniformly stirring, continuously adding 0.21kg of lightweight aggregate, 0.001kg of additive and 0.0002kg of ammonium persulfate, and uniformly stirring to obtain the slurry B, wherein the slurry B is 0.08kg of aniline hydrochloric acid solution, and the slurry C is 0.1kg of water dispersion of petroleum coke powder.
The vibration molding comprises 2 times, and the vibration time is 5s each time.
The maintenance conditions are as follows: maintaining for 20 days under the conditions of normal temperature and pressure and relative humidity of 95 percent RH.
The petroleum coke powder and the fly ash are both subjected to modification treatment, and the specific method of the modification treatment comprises the following steps: dispersing 1kg of petroleum coke powder or fly ash in 1kg of water, adding 0.02kg of hydroxypropyl methyl cellulose and 0.1kg of palmitic acid ethanol solution, carrying out ultrasonic treatment for 20 minutes at 40kHz under the condition of 50 ℃, filtering, drying and crushing to obtain the finished product. The palmitic acid ethanol solution is prepared by adding 1kg of palmitic acid into 5kg of anhydrous ethanol, and slowly heating until the palmitic acid is completely dissolved.
The cement is ordinary portland cement.
The light aggregate comprises a fine light aggregate and a coarse light aggregate, and is prepared from expanded vermiculite, coal cinder, coal gangue, kaolin and aluminum slag according to the mass ratio of 1: 3: 8: 15: 10, the former is crushed to 0.22mm, and the latter is crushed to 5 mm; the mass ratio of the fine lightweight aggregate to the coarse lightweight aggregate is 1: 1.2.
the specific method for compounding comprises the following steps: the coal cinder, the aluminum slag and the coal gangue are crushed and then uniformly mixed with the expanded vermiculite and the kaolin, water which is 0.1 time of the total weight of the crushed coal cinder, the crushed aluminum slag and the coal gangue is added, the mixture is granulated, dried for 2 hours at the temperature of 100 ℃, then the mixture is heated to 800 ℃ and roasted for 20 minutes, and the mixture is cooled to the room temperature.
The additive is prepared from sodium lignosulfonate, silicate cement clinker and triethanolamine according to a mass ratio of 1: 2: 1.5 mixing to obtain the product.
And the slurry B is prepared by mixing aniline and 2mol/L hydrochloric acid solution in a volume ratio of 1: 5 mixing and stirring uniformly to obtain the product; the slurry C is obtained by adding petroleum coke powder into water with the weight 8 times that of the petroleum coke powder and carrying out ultrasonic oscillation for 30 minutes.
Comparative example 2
A preparation method of a light heat preservation type concrete material comprises the steps of adding 0.1kg of manganese dioxide into 1kg of hydrogen peroxide with the mass concentration of 30%, adding prefabricated slurry while stirring, uniformly stirring, vibrating for forming, and curing to obtain the light heat preservation type concrete material;
the prefabricated slurry comprises a slurry A and a slurry B, wherein the slurry A is added during feeding, the slurry A is uniformly stirred, and the slurry B is added while stirring; the slurry A is prepared by the following method: adding 0.02kg of petroleum coke powder and 0.05kg of fly ash into 0.1kg of water, carrying out ball milling, then adding a mixture of 0.15kg of cement and 0.2kg of sand, uniformly stirring, continuously adding 0.21kg of lightweight aggregate, 0.001kg of additive and 0.0002kg of ammonium persulfate, and uniformly stirring to obtain the slurry B, wherein the slurry B is 0.08kg of aniline hydrochloric acid solution.
The vibration molding comprises 2 times, and the vibration time is 5s each time.
The maintenance conditions are as follows: maintaining for 20 days under the conditions of normal temperature and pressure and relative humidity of 95 percent RH.
The petroleum coke powder and the fly ash are both subjected to modification treatment, and the specific method of the modification treatment comprises the following steps: dispersing 1kg of petroleum coke powder or fly ash in 1kg of water, adding 0.02kg of hydroxypropyl methyl cellulose and 0.1kg of palmitic acid ethanol solution, carrying out ultrasonic treatment for 20 minutes at 40kHz under the condition of 50 ℃, filtering, drying and crushing to obtain the finished product. The palmitic acid ethanol solution is prepared by adding 1kg of palmitic acid into 5kg of anhydrous ethanol, and slowly heating until the palmitic acid is completely dissolved.
The cement is ordinary portland cement.
The light aggregate comprises a fine light aggregate and a coarse light aggregate, and is prepared from expanded vermiculite, coal cinder, coal gangue, kaolin and aluminum slag according to the mass ratio of 1: 3: 8: 15: 10, the former is crushed to 0.22mm, and the latter is crushed to 5 mm; the mass ratio of the fine lightweight aggregate to the coarse lightweight aggregate is 1: 1.2.
the specific method for compounding comprises the following steps: the coal cinder, the aluminum slag and the coal gangue are crushed and then uniformly mixed with the expanded vermiculite and the kaolin, water which is 0.1 time of the total weight of the crushed coal cinder, the crushed aluminum slag and the coal gangue is added, the mixture is granulated, dried for 2 hours at the temperature of 100 ℃, then the mixture is heated to 800 ℃ and roasted for 20 minutes, and the mixture is cooled to the room temperature.
The additive is prepared from sodium lignosulfonate, silicate cement clinker and triethanolamine according to a mass ratio of 1: 2: 1.5 mixing to obtain the product.
And the slurry B is prepared by mixing aniline and 2mol/L hydrochloric acid solution in a volume ratio of 1: 5 mixing and stirring uniformly.
Comparative example 3
A preparation method of a light heat preservation type concrete material comprises the steps of adding 0.1kg of manganese dioxide into 1kg of hydrogen peroxide with the mass concentration of 30%, adding prefabricated slurry while stirring, uniformly stirring, vibrating for forming, and curing to obtain the light heat preservation type concrete material;
the prefabricated slurry comprises a slurry A and a slurry C, wherein the slurry A is added during feeding, the slurry A is uniformly stirred, and the slurry C is added while stirring; the slurry A is prepared by the following method: firstly adding 0.02kg of petroleum coke powder and 0.05kg of fly ash into 0.1kg of water, carrying out ball milling, then adding a mixture of 0.15kg of cement and 0.2kg of sand, uniformly stirring, continuously adding 0.21kg of lightweight aggregate and 0.001kg of additive, and uniformly stirring to obtain the slurry C, wherein the slurry C is a water dispersion of 0.1kg of petroleum coke powder.
The vibration molding comprises 2 times, and the vibration time is 5s each time.
The maintenance conditions are as follows: maintaining for 20 days under the conditions of normal temperature and pressure and relative humidity of 95 percent RH.
The petroleum coke powder and the fly ash are both subjected to modification treatment, and the specific method of the modification treatment comprises the following steps: dispersing 1kg of petroleum coke powder or fly ash in 1kg of water, adding 0.02kg of hydroxypropyl methyl cellulose and 0.1kg of palmitic acid ethanol solution, carrying out ultrasonic treatment for 20 minutes at 40kHz under the condition of 50 ℃, filtering, drying and crushing to obtain the finished product. The palmitic acid ethanol solution is prepared by adding 1kg of palmitic acid into 5kg of anhydrous ethanol, and slowly heating until the palmitic acid is completely dissolved.
The cement is ordinary portland cement.
The light aggregate comprises a fine light aggregate and a coarse light aggregate, and is prepared from expanded vermiculite, coal cinder, coal gangue, kaolin and aluminum slag according to the mass ratio of 1: 3: 8: 15: 10, the former is crushed to 0.22mm, and the latter is crushed to 5 mm; the mass ratio of the fine lightweight aggregate to the coarse lightweight aggregate is 1: 1.2.
the specific method for compounding comprises the following steps: the coal cinder, the aluminum slag and the coal gangue are crushed and then uniformly mixed with the expanded vermiculite and the kaolin, water which is 0.1 time of the total weight of the crushed coal cinder, the crushed aluminum slag and the coal gangue is added, the mixture is granulated, dried for 2 hours at the temperature of 100 ℃, then the mixture is heated to 800 ℃ and roasted for 20 minutes, and the mixture is cooled to the room temperature.
The additive is prepared from sodium lignosulfonate, silicate cement clinker and triethanolamine according to a mass ratio of 1: 2: 1.5 mixing to obtain the product.
The slurry C is obtained by adding petroleum coke powder into water with the weight 8 times that of the petroleum coke powder and carrying out ultrasonic oscillation for 30 minutes.
The concrete materials obtained in examples 1 to 5 and comparative examples 1 to 3 were subjected to performance tests, and the results are shown in Table 1.
The test method comprises the following steps: the dry apparent density is measured by a concrete material density tester; concrete strength detection is carried out according to GB50107-2010, and JC 275-.
TABLE 1 Performance test results
As can be seen from Table 1, the concrete materials prepared in examples 1 to 5 were lightweight,the heat preservation performance and the strength are both better. When the slurry A, the slurry B and the slurry C were simultaneously charged in the preparation method of comparative example 1, the dry apparent density of the prepared concrete material was increased by approximately 80g/cm3The compressive strength is reduced by nearly 7MPa, the heat conductivity coefficient is improved by nearly 0.04W/(m.K), the weight is light, and the heat-insulating property and the strength are reduced compared with the embodiment; and the preparation method of the comparative example 2 is not added with the slurry C, the control on the formation process of bubbles is poor, the product strength is obviously reduced, the preparation method of the comparative example 3 is not added with the slurry B and the ammonium persulfate in the slurry A, the polyaniline is not formed, the product strength is obviously reduced, and the heat preservation performance is also poor.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A preparation method of a light-weight heat-preservation concrete material is characterized by comprising the following specific steps: adding 0.1-0.2 part of manganese dioxide into 1 part of 30-40% hydrogen peroxide by weight, stirring while adding the prefabricated slurry, uniformly stirring, vibrating for forming, and maintaining to obtain the light heat-preservation concrete material;
the prefabricated slurry comprises slurry A, slurry B and slurry C, the slurry A is added during feeding, the slurry A is uniformly stirred, the slurry B is added while stirring, and the slurry C is added immediately after the slurry B is fed; the slurry A is prepared by the following method: adding 0.02-0.03 part of petroleum coke powder and 0.05-0.06 part of coal ash into 0.1-0.15 part of water, carrying out ball milling, then adding a mixture of 0.15-0.22 part of cement and 0.2-0.25 part of sand, uniformly stirring, continuously adding 0.21-0.24 part of light aggregate, 0.001-0.002 part of additive and 0.0002-0.0003 part of ammonium persulfate, and uniformly stirring to obtain the slurry B, wherein the slurry B is 0.08-0.11 part of aniline hydrochloric acid solution, and the slurry C is an aqueous dispersion of 0.1-0.15 part of petroleum coke powder.
2. The method according to claim 1, wherein the vibration molding is performed 2 to 3 times for 5 to 8 seconds per vibration.
3. The method according to claim 1, wherein the curing conditions are: and maintaining for 20-22 days under the conditions of normal temperature and normal pressure and relative humidity of 95% RH.
4. The preparation method according to any one of claims-3, wherein the petroleum coke powder and the fly ash are both subjected to modification treatment, and the specific method of the modification treatment comprises the following steps in parts by weight: dispersing 1 part of petroleum coke powder or fly ash in 1-1.2 parts of water, then adding 0.02-0.04 part of hydroxypropyl methyl cellulose and 0.1-0.2 part of palmitic acid ethanol solution, heating and ultrasonically treating, filtering, drying and crushing to obtain the finished product.
5. The method according to any one of claims 1 to 4, wherein the process conditions of the heat ultrasonic treatment are as follows: and (3) carrying out ultrasonic treatment for 20-30 minutes at 40-50 kHz under the condition of 50-60 ℃.
6. The method according to any one of claims 1 to 5, wherein the cement is any one selected from ordinary portland cement, portland slag cement, portland fly ash cement, and portland pozzolan cement.
7. The preparation method according to claim 1, wherein the lightweight aggregate comprises two parts of fine lightweight aggregate and coarse lightweight aggregate, and the two parts are prepared from expanded vermiculite, coal cinder, coal gangue, kaolin and aluminum dross according to a mass ratio of 1: 3-4: 8-10: 15-20: 10-12, and pulverizing, wherein the former is pulverized to 0.22-0.88 mm, and the latter is pulverized to 5-8 mm; the mass ratio of the fine lightweight aggregate to the coarse lightweight aggregate is 1: 1.2 to 1.3.
8. The preparation method according to claim 1, wherein the additive is any one of sodium lignosulfonate, a TH-928 polycarboxylic acid water reducer or a YZ-1 naphthalene high-efficiency water reducer, and the portland cement clinker and triethanolamine in a mass ratio of 1: 2-3: 1.5-2.
9. The preparation method according to claim 1, wherein the B slurry is prepared by mixing aniline and 2mol/L hydrochloric acid solution in a volume ratio of 1: 5-6, and uniformly stirring to obtain the mixture; the slurry C is obtained by adding petroleum coke powder into water 8-10 times of the weight of the petroleum coke powder and performing ultrasonic oscillation for 30-40 minutes.
10. A lightweight heat insulating concrete material produced by the method of any one of claims 1 to 9.
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