CN115385623A - Carbon absorption foam concrete based on industrial waste residues and preparation method thereof - Google Patents
Carbon absorption foam concrete based on industrial waste residues and preparation method thereof Download PDFInfo
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- CN115385623A CN115385623A CN202210910026.4A CN202210910026A CN115385623A CN 115385623 A CN115385623 A CN 115385623A CN 202210910026 A CN202210910026 A CN 202210910026A CN 115385623 A CN115385623 A CN 115385623A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/0427—Dry 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
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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
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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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
- C04B2111/00017—Aspects relating to the protection of the environment
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides carbon absorption foam concrete based on industrial waste residues and a preparation method thereof, and provides carbon absorption foam concrete based on industrial solid wastes and a preparation method thereof, wherein the carbon absorption foam concrete mainly comprises the following raw materials in parts by weight: 20-40 parts of cement, 60-80 parts of industrial solid waste, 10-60 parts of water, 0-8 parts of an early strength agent, 0-5 parts of a water reducing agent and 0-5 parts of an exciting agent; the foaming agent solution is prepared by mixing and foaming a foaming agent and water in a mass ratio of 1; the blowing agent solution generates a volume of foam in an amount of 20 to 100 times the volume of the slurry. The carbon absorption foam concrete prepared by the invention takes a large amount of solid waste steel slag and carbide slag as main raw materials, is beneficial to resource utilization of industrial waste slag, and effectively reduces the production cost of the foam concrete.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to carbon absorption foam concrete based on industrial waste residues and a preparation method thereof.
Background
The foam concrete is a novel building energy-saving material which is environment-friendly, energy-saving, low in cost and good in flame retardant property, and is widely applied to the aspects of building heat preservation, soft soil roadbed reinforcement and the like. The foam concrete based on the industrial waste residue has the advantages of low cost, contribution to solid waste resource utilization and the like, and becomes a new technical development direction. The common foam concrete raw materials comprise cement, slag, fly ash and the like, which are mixed according to a certain mixing proportion, then a proper amount of water is added for stirring and pulping, a foaming agent solution is added into a high-speed foaming machine to prepare foam, then the foam is added into slurry, and the foam concrete building block is obtained after molding, demoulding and curing.
The invention discloses a steel slag foam concrete block with large mixing amount and a preparation method thereof (with the publication number of CN 1033011723B). The method takes cement as cementing material, steel slag as admixture, early strength agent, coagulant, water reducing agent and fiber as admixture, and desulfurized gypsum as excitant, wherein the steel slag is superfine steel slag which is prepared by air flow grinding and has specific surface area of more than 5000m < 2 >/kg, and the granularity of the superfine steel slag is less than 20 mu m. Uniformly stirring and adding water to form slurry, adding a foaming agent solution, stirring to prepare foam slurry, and forming, demolding and maintaining to obtain the foam concrete building block.
The invention discloses a preparation method of foam concrete blended with steel slag powder (publication number is CN 113816664A). Preparing water, cement, fine powder of foam concrete waste, steel slag powder and other raw materials into slurry, preparing a composite foaming agent into foam by using a foaming agent, mixing the foam foaming agent with the slurry, and pouring and forming to prepare the foam concrete building block.
The defects commonly existing in the existing preparation method of the foam concrete block based on solid waste comprise: 1. the production process has large carbon emission and does not have the carbon fixation function. The CO2 emission caused by the firing process and the curing process of the cement which is the main raw material of the foam concrete is large. 2. The industrial solid waste consumption is low, the cement consumption is high, and the production cost is high. The steel slag and the carbide slag are large solid wastes in industrial production in China, and the main reasons of low comprehensive utilization rate are that the steel slag and the carbide slag have large activity and energy consumption and poor stability when being mechanically excited. The cement and the steel slag have a 'synergistic effect', the interface transition region can be well improved by increasing the consumption of the steel slag, but the steel slag has large particles, high hardness, high iron content and poor grindability, so the material abrasion of crushing and grinding equipment and the grinding power consumption are relatively large; the steel slag-based foam concrete has the problems of large component fluctuation, more free CaO, easy expansion in the use process and poor stability. 3. The production cycle is long, and high-quality products with high strength and low density are difficult to obtain in a short cycle. The compression strength of the foam concrete with the volume density of 600kg/m < 3 > is seriously lower, generally lower than 3MPa, and some are even lower than 1MPa. The foam concrete for heat preservation and heat insulation has the density of less than 400kg/m < 3 > and the strength of less than 0.5MPa. Compared with cement-based foam concrete, the slag foam concrete prepared from industrial solid waste has lower strength. Too low compressive strength is not well popularized in engineering applications.
Disclosure of Invention
The invention aims to provide carbon absorption foam concrete based on industrial waste residues and a preparation method thereof, which can directly absorb a large amount of CO2 in the production and use processes, realize the permanent storage and utilization of CO2, have the characteristics of short production period, high carbon fixation amount, light weight and high strength, and can overcome the defects of early cracking and later-stage large shrinkage of the foam concrete. The technical effects that can be produced by the preferred technical scheme of the technical schemes provided by the invention are described in detail in the following.
In order to realize the purpose, the invention provides the following technical scheme:
the invention provides carbon absorption foam concrete based on industrial solid waste, which is prepared from the following concrete raw materials in parts by weight: 20-40 parts of cement, 60-80 parts of industrial solid waste, 10-60 parts of water, 0-8 parts of early strength agent, 0-5 parts of water reducing agent and 0-5 parts of exciting agent; the concrete raw material also comprises a foaming agent, and the foaming agent solution is prepared by mixing and foaming the foaming agent and water in a mass ratio of 1; the foaming agent solution generates foam with a volume amount of 20-100 times the volume of the slurry.
Further, the preparation method comprises the following steps of: 25-30 parts of cement, 65-70 parts of industrial solid waste, 20-50 parts of water, 1-5 parts of an early strength agent, 1-3 parts of a water reducing agent and 1-3 parts of an excitant; the concrete raw material also comprises a foaming agent solution, wherein the foaming agent solution is prepared by mixing and foaming a foaming agent and water in a mass ratio of 1; the volume amount of foam generated by the foaming agent solution is 30-90 times of the volume of the slurry.
Further, the preparation method comprises the following steps of: 28 parts of cement, 66 parts of industrial solid waste, 25 parts of water, 3 parts of an early strength agent, 2 parts of a water reducing agent and 2 parts of an exciting agent; the concrete raw material also comprises a foaming agent solution, wherein the foaming agent solution is prepared by mixing and foaming a foaming agent and water according to the mass ratio of 1; the blowing agent solution produced a volume of foam in an amount of 60 times the volume of the slurry.
Further, the cement is portland cement.
Further, the industrial solid waste is one or two of steel slag and carbide slag with the specific surface area of 200-600 m 2/kg;
furthermore, the early strength agent is a calcium early strength agent.
Further, the water reducing agent is one or two of naphthalene series water reducing agents and polycarboxylic acid series water reducing agents.
Further, the excitant is one or two of water glass or NaOH.
Further, the foaming agent is one or more of an HTQ-1 type composite animal protein foaming agent, a plant type foaming agent and a composite foaming agent, wherein the composite foaming agent is prepared from the following raw materials in parts by weight: 30 parts of surfactant, 20 parts of foam stabilizer, 45 parts of water, 3 parts of diluent, 1.5 parts of reinforcing agent and 0.8 part of water-retaining agent; the surfactant is a combination of alpha-sodium alkenyl sulfonate, fatty acid polyoxyethylene ether sodium sulfate and dodecyl polyoxyethylene ether, and the weight ratio of the alpha-sodium alkenyl sulfonate to the fatty acid polyoxyethylene ether sodium sulfate to the dodecyl polyoxyethylene ether is 3:2:1; the foam stabilizer is polyacrylamide, and the diluent is ethanol; the reinforcing agent is sodium chloride, and the water-retaining agent is dispersible emulsion powder.
The preparation method of the carbon absorption foam concrete provided by the invention specifically comprises the following steps:
the method comprises the following steps: mixing cement, industrial solid waste dry powder, water and an additive in parts required by the slurry to prepare the slurry;
step two: mechanically foaming by using a high-speed foaming agent to prepare the foaming agent into foam;
step three: respectively and uniformly mixing the slurry prepared in the step one and the foam prepared in the step two to prepare mixed slurry;
step four: injecting the mixed slurry into a mold coated with oil, leveling the mixed slurry by a trowel, and then placing the trowel in a constant-temperature constant-humidity curing box for curing for 3 to 16 hours to obtain certain early strength;
step five: and (3) demolding, placing the initial setting test block in a mineralization reactor, and curing for 1-8h under the conditions that the pressure is 0.1-0.4MPa and the volume concentration of CO2 is 20-28%, so as to prepare the carbon absorption foam concrete block.
The hydration products of the building block after pre-curing are mainly C-S-H gel and ettringite, the amount of the ettringite and the C-S-H gel in the hydration products is obviously increased after the hydration products are excited by the additive, and more hydration products are formed along with the prolonging of the pre-curing time, which is the key of the early strength of the building block. The CO2 mineralization maintenance requires certain plasticity of the hole wall of the foam concrete, so that the early strength is not high. The steel slag has hydraulicity and gelatinization and can enhance the strength of the building block. The carbide slag can replace partial lime, and the carbide slag and the lime are used as main raw materials, so that the cost for producing the foam concrete can be greatly reduced. However, the too large amount of carbide slag easily causes the too much calcium hydroxide to destroy the skeleton structure generated by hydration products and unreacted particles, so that the cracking of the building block is easily caused, and the compressive strength and the durability of the building block are reduced. The excitant can destroy the vitreous body structure in the steel slag and promote hydration reaction. In the CO2 mineralization maintenance, CO2 is dissolved in water to form carbonic acid, and then the carbonic acid reacts with calcium silicate hydrate, ca (OH) 2 and the like to form stable carbonate, so that micropores in the hole wall can be filled, and the strength of the foam concrete is improved while a large amount of CO2 is absorbed.
Based on the technical scheme, the embodiment of the invention at least can produce the following technical effects:
(1) The carbon absorption foam concrete prepared by the invention takes a large amount of solid waste steel slag and carbide slag as main raw materials, is beneficial to resource utilization of industrial waste slag, and effectively reduces the production cost of the foam concrete;
(2) The carbon absorption agent can directly absorb CO2 in the tail flue gas of the cement kiln, the solid carbon amount accounts for 18-22% of the mass of the carbon absorption agent, and CO2 in the environment can be continuously absorbed in the using process, so that the carbon absorption agent is an effective way for carbon utilization;
(3) The carbonization curing process can effectively shorten the production period of the foam concrete and improve the production efficiency in industrial production;
(4) The carbon absorption foam concrete has the characteristics of light weight and high strength, and the defects of early cracking and later shrinkage are improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Comparative example 1:
a common foam concrete is prepared by uniformly mixing 25 parts of cement, 55 parts of steel slag, 20 parts of carbide slag, 20 parts of water, 8 parts of early strength agent and 5 parts of water glass according to parts by weight to prepare slurry; and mixing and foaming the compound type foaming agent and water by using a high-speed foaming machine according to the mass ratio of 1. Uniformly mixing the slurry and the foam to prepare slurry; injecting the mixed slurry into a mold coated with oil, leveling the mixed slurry by using a trowel, and then placing the trowel into a constant-temperature constant-humidity curing box to be cured for 3 hours at the temperature of 40 ℃ so as to obtain certain early strength; and (4) demolding, namely placing the initial setting test block in a standard curing room, and curing for 1d at normal temperature to obtain the foam concrete block. The volume weight of the prepared carbon absorption foam concrete is 623kg/m < 3 >, the compressive strength is 1.2MPa, and the drying shrinkage rate is less than 1.8mm/m.
Comparative example 2:
a common foam concrete is prepared by uniformly mixing 30 parts of cement, 50 parts of steel slag, 20 parts of carbide slag, 20 parts of water and 8 parts of early strength agent according to parts by weight to prepare slurry; mixing and foaming the HTQ-1 type compound animal protein foaming agent and water according to the mass ratio of 1. Uniformly mixing the slurry and the foam to prepare slurry; injecting the mixed slurry into a mould coated with oil, leveling the mixed slurry by a trowel, and then placing the trowel in a constant-temperature constant-humidity curing box for curing for 3 hours at 40 ℃ to obtain certain early strength; and (4) demolding, namely placing the initial setting test block in a standard curing room, and curing for 28 days at normal temperature to obtain the foam concrete block. The prepared foam concrete has the volume weight of 623kg/m < 3 >, the compressive strength of 2.5MPa and the drying shrinkage rate of less than 1.9mm/m.
Comparative example 3:
a common foam concrete is prepared by uniformly mixing 50 parts of cement, 20 parts of steel slag, 30 parts of carbide slag, 40 parts of water, 3 parts of water reducing agent and 5 parts of water glass according to the weight part ratio to prepare slurry; mixing and foaming the plant type foaming agent and water according to the mass ratio of 1. Uniformly mixing the slurry and the foam to prepare slurry; injecting the mixed slurry into a mold coated with oil, leveling the mixed slurry by using a trowel, and then placing the trowel into a constant-temperature constant-humidity curing box to be cured for 12 hours at the temperature of 25 ℃ so as to obtain certain early strength; and (4) demolding, namely placing the initial setting test block in a standard curing room, and curing for 28 days at normal temperature to obtain the foam concrete block. The volume weight of the prepared foam concrete is 623kg/m < 3 >, the compressive strength is 3.1MPa, and the drying shrinkage rate is less than 1.8mm/m.
Example 1:
a carbon absorption foam concrete based on industrial solid waste is prepared by uniformly mixing 40 parts of cement, 50 parts of steel slag, 10 parts of carbide slag, 10 parts of water, 8 parts of early strength agent and 5 parts of water glass according to parts by weight to prepare slurry; mixing and foaming the HTQ-1 type compound animal protein foaming agent and water according to the mass ratio of 1. Uniformly mixing the slurry with the foam to prepare slurry; injecting the mixed slurry into a mold coated with oil, leveling the mixed slurry by using a trowel, and then placing the trowel into a constant-temperature constant-humidity curing box to be cured for 4 hours at the temperature of 40 ℃ so as to obtain certain early strength; and (3) demolding, placing the initial setting test block in a mineralization reactor, and maintaining the initial setting test block for 4 hours under the atmosphere of 0.4MPa of pressure and 25% of CO2 volume concentration to obtain the carbon absorption foam concrete block. The prepared carbon absorption foam concrete has the volume weight of 623kg/m < 3 >, the compressive strength of 6.2MPa, the carbon absorption of 18.8 percent and the drying shrinkage rate of less than 1.2mm/m.
Example 2:
20 parts of cement, 60 parts of steel slag, 20 parts of carbide slag, 60 parts of water, 8 parts of an early strength agent, 5 parts of a polycarboxylic acid water reducing agent and 5 parts of NaOH are uniformly mixed according to the weight parts to prepare slurry; mixing and foaming the plant type foaming agent and water by using a high-speed foaming machine according to the mass ratio of 1. Uniformly mixing the slurry with the foam to prepare slurry; injecting the mixed slurry into a mold coated with oil, leveling the mixed slurry by using a trowel, and then placing the trowel into a constant-temperature constant-humidity curing box to be cured for 8 hours at the temperature of 55 ℃ so as to obtain certain early strength; and (3) demolding, namely placing the initial setting test block in a mineralization reactor, and maintaining the initial setting test block for 8 hours under the atmosphere of 0.1MPa of pressure and 28% of CO2 volume concentration to obtain the carbon absorption foam concrete block. The prepared carbon absorption foam concrete has the volume weight of 601kg/m < 3 >, the compressive strength of 5.8MPa, the carbon absorption of 19.4 percent and the drying shrinkage rate of less than 1.1mm/m.
Example 3:
a carbon absorption foam concrete based on industrial solid waste is prepared by uniformly mixing 35 parts of cement, 40 parts of steel slag, 25 parts of carbide slag, 40 parts of water and 1 part of polycarboxylic acid water reducer according to parts by weight to prepare slurry; and mixing and foaming the compound foaming agent and water according to a mass ratio of 1. Uniformly mixing the slurry with the foam to prepare slurry; injecting the mixed slurry into a mold coated with oil, leveling the mixed slurry by using a trowel, and then placing the trowel into a constant-temperature constant-humidity curing box to be cured for 16 hours at the temperature of 60 ℃ so as to obtain certain early strength; and (3) demolding, namely placing the initial setting test block in a mineralization reactor, and maintaining the initial setting test block for 1h under the atmosphere of 0.2MPa of pressure and 20% of CO2 volume concentration to obtain the carbon absorption foam concrete block. The volume weight of the prepared carbon absorption foam concrete is 618kg/m < 3 >, the compressive strength is 6.3MPa, the carbon absorption is 19.2 percent, and the drying shrinkage rate is less than 1.3mm/m.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A carbon absorption foam concrete based on industrial solid waste is characterized in that: the preparation method comprises the following concrete raw materials in parts by weight: 20-40 parts of cement, 60-80 parts of industrial solid waste, 10-60 parts of water, 0-8 parts of early strength agent, 0-5 parts of water reducing agent and 0-5 parts of exciting agent; the concrete raw material also comprises a foaming agent, and the foaming agent solution is prepared by mixing and foaming the foaming agent and water in a mass ratio of 1; the foaming agent solution generates foam with a volume amount of 20-100 times the volume of the slurry.
2. The carbon absorption foam concrete based on industrial solid waste according to claim 1, which is characterized in that: the preparation method comprises the following concrete raw materials in parts by weight: 25-30 parts of cement, 65-70 parts of industrial solid waste, 20-50 parts of water, 1-5 parts of an early strength agent, 1-3 parts of a water reducing agent and 1-3 parts of an exciting agent; the concrete raw material also comprises a foaming agent solution, wherein the foaming agent solution is prepared by mixing and foaming a foaming agent and water in a mass ratio of 1; the foaming agent solution generates foam with volume amount 30-90 times of the slurry volume.
3. The carbon absorption foam concrete based on industrial solid waste according to claim 2, wherein: the preparation method comprises the following concrete raw materials in parts by weight: 28 parts of cement, 66 parts of industrial solid waste, 25 parts of water, 3 parts of an early strength agent, 2 parts of a water reducing agent and 2 parts of an excitant; the concrete raw material also comprises a foaming agent solution, wherein the foaming agent solution is prepared by mixing and foaming a foaming agent and water according to the mass ratio of 1; the blowing agent solution produced a volume of foam in an amount of 60 times the volume of the slurry.
4. The carbon absorbing foam concrete based on industrial solid wastes according to any one of claims 1 to 3, characterized in that: the cement is portland cement.
5. The carbon absorbing foamed concrete based on industrial solid wastes according to any one of claims 1 to 3, characterized in that: the industrial solid waste is one or two of steel slag and carbide slag with the specific surface area of 200-600 m 2/kg.
6. The carbon absorbing foam concrete based on industrial solid wastes according to any one of claims 1 to 3, characterized in that: the early strength agent is a calcium early strength agent.
7. The carbon absorbing foamed concrete based on industrial solid wastes according to any one of claims 1 to 3, characterized in that: the water reducing agent is one or two of naphthalene series water reducing agents and polycarboxylic acid series water reducing agents.
8. The carbon absorbing foamed concrete based on industrial solid wastes according to any one of claims 1 to 3, characterized in that: the excitant is one or two of water glass or NaOH.
9. The carbon absorbing foamed concrete based on industrial solid wastes according to any one of claims 1 to 3, characterized in that: the foaming agent is one or more of an HTQ-1 type composite animal protein foaming agent, a plant type foaming agent and a composite foaming agent, wherein the composite foaming agent is prepared from the following raw materials in parts by weight: 30 parts of surfactant, 20 parts of foam stabilizer, 45 parts of water, 3 parts of diluent, 1.5 parts of reinforcing agent and 0.8 part of water-retaining agent; the surfactant is a combination of alpha-sodium alkenyl sulfonate, fatty acid polyoxyethylene ether sodium sulfate and dodecyl polyoxyethylene ether, and the weight ratio of the alpha-sodium alkenyl sulfonate to the fatty acid polyoxyethylene ether sodium sulfate to the dodecyl polyoxyethylene ether is 3:2:1; the foam stabilizer is polyacrylamide, and the diluent is ethanol; the reinforcing agent is sodium chloride, and the water-retaining agent is dispersible latex powder.
10. The method for producing a carbon-absorbing foamed concrete according to any one of claims 1 to 9, characterized in that: the method specifically comprises the following steps:
the method comprises the following steps: mixing cement, industrial solid waste dry powder, water and an additive in parts required by the slurry to prepare slurry;
step two: mechanically foaming by using a high-speed foaming agent to prepare the foaming agent into foam;
step three: respectively and uniformly mixing the slurry prepared in the step one and the foam prepared in the step two to prepare mixed slurry;
step four: injecting the mixed slurry into a mold coated with oil, leveling the mixed slurry by using a trowel, and then placing the trowel into a constant-temperature constant-humidity curing box for curing for 3 to 16 hours to obtain certain early strength;
step five: and (3) demolding, placing the initial setting test block in a mineralization reactor, and curing for 1-8h under the conditions that the pressure is 0.1-0.4MPa and the volume concentration of CO2 is 20-28%, so as to prepare the carbon absorption foam concrete block.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116199483A (en) * | 2023-03-13 | 2023-06-02 | 华润水泥技术研发有限公司 | Preparation method of carbon-fixing foam concrete |
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| CN103011723A (en) * | 2012-12-12 | 2013-04-03 | 首钢总公司 | Heavily-doped steel slag foam concrete building block and preparation method thereof |
| US20220227677A1 (en) * | 2021-01-12 | 2022-07-21 | Iman Mehdipour | Carbonation system for curing of concrete products at ambient pressure |
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