CN114835440B - Carbon-fixing slag foam concrete wall material and preparation method thereof - Google Patents

Carbon-fixing slag foam concrete wall material and preparation method thereof Download PDF

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CN114835440B
CN114835440B CN202210263334.2A CN202210263334A CN114835440B CN 114835440 B CN114835440 B CN 114835440B CN 202210263334 A CN202210263334 A CN 202210263334A CN 114835440 B CN114835440 B CN 114835440B
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foam
water
carbon
foaming
slag
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CN114835440A (en
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金�畅
张烨
尚辉
王露达
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Yitianlan Shandong New Material Technology Co ltd
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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
    • 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
    • C04B38/106—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam by adding preformed foams
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/14—Cements containing slag
    • C04B7/147—Metallurgical slag
    • C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
    • C04B7/1535—Mixtures thereof with other inorganic cementitious materials or other activators with alkali metal containing activators, e.g. sodium hydroxide or waterglass
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • C04B2111/285—Intumescent materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40—Porous or lightweight materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/52—Sound-insulating materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
    • 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
    • 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 belongs to the technical field of building materials, and particularly relates to a carbon fixation slag foam concrete wall material as well as a preparation method and application thereof. The wall material is prepared from the following raw materials in percentage by mass: slag powder: 39.5-53.4%, fly ash: 2.6-3.6%, superfine powder: 1.8-2.4%, swelling agent: 0.4-0.59%, fiber: 0.12-0.47%, humectant: 0.007-0.009%, excitant: 20.4-28.3%, water reducing agent: 0.22-0.3%, polymer emulsion: 0.44-0.47%, water repellent: 0.4-0.59%, CO2 foaming stabilizer: 3.7-17.4%, water: 10.4 to 14.2 percent. The invention can improve the performance of the wall material with low energy consumption and simultaneously greatly consume and capture CO 2 Slag is used instead of cement binder to reduce carbon emissions.

Description

Carbon-fixing slag foam concrete wall material and preparation method thereof
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a carbon-fixing slag foam concrete wall material and a preparation method and application thereof.
Background
In 2018, the emission of carbon dioxide in China is about 100 hundred million t, and the carbon dioxide is utilized by industries such as beverage, food preservation, welding, chemical fertilizer, oil displacement and the like by 10 hundred million t every year, and the utilization rate is 10 percent. Therefore, the task of realizing the double-carbon target is very difficult, and the technological innovation of carbon resource utilization is not slow. CO2 2 Has carbonization effect on dicalcium silicate, tricalcium silicate, calcium hydroxide, calcium silicate hydrate, calcium aluminate hydrate, calcium oxide, magnesium oxide, etc., and can improve strength and durability of carbide, enhance dimensional stability of carbide, and increase CO content 2 The gas has much lower thermal conductivity than oxygen, hydrogen and air, and is made of CO 2 Gas as bubblesThe foam gas of the foam concrete can greatly reduce the heat conductivity coefficient of the foam concrete product and improve the heat insulation performance of the product.
CO 2 Is an acidic gas, is readily soluble in water, and can dissolve approximately 1 volume of CO in 1 volume of water at 20 deg.C 2 Gas at normal temperature and pressure lower than standard atmospheric pressure, with CO 2 The foam concrete product prepared by the physical foaming method of foaming gas is easy to collapse and even not formed, and does not have mechanical property. At present, the foam gas generated by the light concrete products in the market by the physical method or the chemical method takes hydrogen, oxygen or air as the gas medium. Although some theoretical studies have been made in experiments with CO 2 Foamed concrete for foaming gas, but produced by a chemical self-generating foaming process, in which the foamed concrete is produced and passed through CO 2 Carbonization improves the performance of the foam concrete, but does not take up the captured CO 2 And the method can not contribute to energy conservation and emission reduction and can also contribute to the realization of the double-carbon target. And the product cost is quite high, and the popularization and application difficulty is high.
The cement production belongs to the high-energy-consumption and high-pollution industry, and the mass utilization of the cement inevitably brings great pressure on energy conservation and emission reduction, environmental protection and realization of a double-carbon target.
The granulated blast furnace slag is waste slag generated in iron making, and the annual output of the slag in China is more than 2 hundred million t each year. The fly ash is the main solid waste discharged by coal-fired power plants, and a large amount of waste residues can occupy a large amount of cultivated land without being treated, generate raise dust and pollute the atmosphere and underground water.
Along with the popularization and application of building energy-saving technology, organic heat-insulating materials are widely adopted, but due to the poor combustion performance of the organic heat-insulating materials, fire hazard safety hazards exist in buildings using the organic heat-insulating materials. The inorganic foam concrete heat-insulating material has the defects of large heat conductivity coefficient, low strength, easy pulverization in the later period and poor durability, so the popularization and the utilization are limited.
Under the support of national and local governments at all levels, the assembly type building is rapidly developed, the main structure technology of the assembly type building is mature and perfect day by day, but the wall enclosure system technology is relatively lagged, and the development of the assembly type building is restricted. The autoclaved aerated concrete wallboard or the foam concrete wallboard takes hydrogen or oxygen or air as foaming gas, and can not meet the thermal engineering requirement of a building within the designed wall thickness by depending on a single material of the autoclaved aerated concrete wallboard or the foam concrete wallboard due to large heat conductivity coefficient. In order to meet the energy-saving requirement of buildings and ensure that the using area of the buildings is not reduced, the enclosure wallboard has to adopt the structural forms of inner and outer leaf steam-cured concrete slabs, sandwich organic heat-preservation and heat-insulation materials, autoclaved aerated concrete slab composite organic heat-preservation and heat-insulation materials and the like, the production links of the wallboard are more, the process is complex, the cost is high, the energy consumption is large, the carbon emission is large, and a large amount of organic heat-preservation materials are adopted, so that the fire hazard safety exists in the buildings.
The general lightweight concrete building block cannot meet the building energy-saving requirement within the thickness of a building design wall body by the thermal property of a single material of the general lightweight concrete building block due to the large heat conductivity coefficient, an external thermal insulation system of an external wall has to be made, the cost is increased, the construction period is prolonged, and the service life of the external thermal insulation system is only 20 years. In order to meet the requirement of saving energy by 75 percent of the building and ensure that the using area of the building is not reduced, the self-insulation building blocks are all made of concrete or autoclaved aerated concrete block composite organic heat-insulation materials at present. However, the organic heat-insulating material is inflammable, so that fire hazard potential exists in the building. Furthermore, the autoclaved aerated concrete block adopts lime and cement as raw materials and a high-temperature autoclaved production process, so that the energy consumption is high, carbon emission is generated, and the production process does not meet the sustainable development requirement.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a carbon-fixing slag foam concrete wall material which can greatly absorb captured CO while improving the performance of a low-energy-consumption wall material 2 Slag is used for replacing a cement cementing material, so that carbon emission is reduced, and contribution is made to realizing the national 'double carbon' goal; the invention also provides a preparation method of the composition.
The purpose of the invention is realized by the following technical scheme:
the carbon-fixing slag foam concrete wall material is prepared from the following raw materials in percentage by mass: slag powder: 39.5-53.4%, fly ash: 2.6-3.6%, superfine powder: 1.8-2.4%, swelling agent: 0.4-0.59%, fiber: 0.12-0.47%, humectant: 0.007-0.009%, excitant: 20.4-28.3%, water reducing agent: 0.22-0.3%, polymer emulsion: 0.44-0.47%, water repellent: 0.4-0.59%, CO 2 Foaming foam stabilizer: 3.7-17.4%, water: 10.4 to 14.2 percent.
In the preferable scheme 1, the carbon-fixing slag foam concrete wall material is prepared from the following raw materials in percentage by mass: slag powder: 39.5-42.2%, fly ash: 2.6-2.8%, superfine powder: 1.8-1.89%, swelling agent: 0.4-0.56%, fiber: 0.44-0.47%, humectant: 0.007-0.0072%, excitant: 26.3-28.3%, water reducing agent: 0.22-0.24%, polymer emulsion: 0.44-0.47%, water repellent: 0.4-0.56% of CO 2 Foaming foam stabilizer: 11.2-17.4%, water: 10.4 to 11.4 percent. The formula is suitable for preparing the carbon-fixing slag foam concrete fireproof insulation board.
In the preferable scheme 2, the carbon-fixing slag foam concrete wall material is prepared from the following raw materials in percentage by mass: slag powder: 52.5-53.4%, fly ash: 3.5-3.6%, superfine powder: 2.3-2.4%, swelling agent: 0.58-0.59%, fiber: 0.12%, humectant: 0.009%, excitant: 20.4-20.8%, water reducing agent: 0.29-0.3%, polymer emulsion: 0.47%, water repellent: 0.58-0.59% of CO 2 Foaming foam stabilizer: 3.7-5.3%, water: 13.9 to 14.2 percent. The formula is suitable for preparing the carbon-fixing slag foam concrete base material or the carbon-fixing slag foam concrete self-insulation building block of the carbon-fixing slag foam concrete assembled wallboard.
The carbon-fixing slag foam concrete assembled wallboard is manufactured by arranging two layers of reinforcing ribs in a carbon-fixing slag foam concrete slab in parallel and respectively coating a layer of reinforcing material on two surfaces of the slab. The carbon-fixing slag foam concrete slab is made of a carbon-fixing slag foam concrete base material. The reinforcing ribs are rust-proof reinforcing steel meshes. The anti-rust steel mesh sheets are two layers and are arranged in the foam concrete slab, and the positions of the anti-rust steel mesh sheets are 20mm +/-5 away from the surfaces of the two plates respectively. The reinforcing material is fiber mesh cloth. The fiber mesh cloth is one of alkali-resistant glass fiber mesh cloth or basalt fiber mesh cloth.
Said CO 2 Foaming foam stabilizer and CO 2 Gas is used for preparing CO in a foam foaming machine by adopting a compressed gas method 2 And (3) foaming.
Said CO 2 The foaming foam stabilizer is a solution formed by mixing a surfactant, a foam stabilizer, a thickening film-forming agent and water, and the foaming foam stabilizer comprises the following components in percentage by mass: 3.5 to 8.5 percent of surfactant, 0.5 to 4.5 percent of foam stabilizer, 0.1 to 0.6 percent of thickening film-forming agent and 86.4 to 95.9 percent of water.
The surfactant is a mixture of sodium dodecyl sulfate, sodium dodecyl alcohol ether sulfate and a fluorocarbon surfactant, the mass ratio of the sodium dodecyl sulfate to the sodium dodecyl alcohol ether sulfate to the fluorocarbon surfactant is 7.
The foam stabilizer is modified silicone resin polyether emulsion MPS, produced by Shandong Damai New Material science and technology Limited.
The thickening film-forming agent is a mixture of xanthan gum, konjac micropowder, hydroxypropyl methylcellulose and benzyl alcohol, and the mass ratio of the xanthan gum, the konjac micropowder, the hydroxypropyl methylcellulose to the benzyl alcohol is 3. The thickening film-forming agent solution is a solution without flocculation.
The slag powder is granulated blast furnace slag powder, the activity index is one of S105 or S95, and the specific surface area is 400-650m 2 /kg。
The fly ash is grade 1 ash, and the specific surface area of the fly ash is 400-650m 2 /kg。
The superfine micropowder is silica fume micropowder or metakaolin micropowder, and the specific surface area of the superfine micropowder is more than or equal to 20000m 2 /kg。
The expanding agent is calcium sulphoaluminate-calcium oxide expanding agent.
The fiber is one of polypropylene fiber or basalt fiber, and the length of the fiber is 9-12mm.
The humectant is a polyacrylamide humectant.
The excitant is an alkaline solution prepared from sodium silicate and sodium hydroxide, the modulus is 1.2-1.5, and the baume degree is 40.
The water reducing agent is a polycarboxylic acid water reducing agent, the solid content is 40%, and the water reducing rate is 25-35%.
The polymer emulsion is one of silicone-acrylic emulsion, pure acrylic emulsion or styrene-acrylic emulsion, the solid content is 48-52%, and the pH value is 7-8.
The waterproof agent is one of methyl silicon alcohol potassium, methyl silicon alcohol sodium or ammonium stearate emulsion.
The preparation method of the carbon-fixing slag foam concrete wall material comprises the following steps:
(1) Raw material metering: measuring the adopted raw materials according to the formula;
(2) Preparing slurry: mixing and stirring the slag powder, the fly ash, the superfine powder, the expanding agent, the humectant and the fiber into uniform powder; mixing and stirring an excitant, a water reducing agent, polymer emulsion, a waterproof agent and water to form a uniform solution; adding the uniform solution into the uniform powder, and stirring to form uniform slurry;
(3)CO 2 preparing foam: introducing CO 2 Foaming foam stabilizer and metered CO 2 The gas enters a foam foaming machine through respective pipelines at the same time, and CO is prepared by a gas compression method 2 Foaming;
(4)CO 2 preparing foam slurry: stirring the slurry for 180-240s, and adding CO 2 Inputting foam into the prepared uniform slurry, and stirring for 240-300s to obtain uniform CO 2 A foamed slurry;
(5) Injecting into a mold: mixing the uniform CO 2 And injecting the foam slurry into a mold, and curing to obtain the solid carbon slag foam concrete wall material.
Preferably, the preparation method of the carbon-fixing slag foam concrete wall material provided by the invention specifically comprises the following steps:
(1) Raw material metering: measuring the adopted raw materials according to the formula;
(2) Preparing slurry:
(1) inputting the slag powder, the fly ash, the superfine micro powder, the expanding agent, the humectant and the fiber into a stirring tank, mixing and stirring the mixture until the mixture is uniform, stirring the mixture for 180 seconds, and stirring the mixture at the speed of 180-240r/min;
(2) inputting an excitant, a water reducing agent, polymer emulsion, a waterproof agent and water into a liquid stirring tank and stirring into a uniform solution;
(3) inputting the uniform solution prepared in the step (2) into the uniform powder prepared in the step (1), stirring the uniform solution into uniform slurry for 180-240s at a stirring speed of 180-300r/min;
(3) Preparing slurry:
CO 2 foam stabilizer and CO 2 Preparing foam:
(1) raw material metering:
CO 2 the optimal scheme (the following scheme is adopted) of the foaming and foam stabilizing agent comprises the following raw materials in percentage by mass: sodium lauryl sulfate: 3.5%, sodium lauryl alcohol ether sulfate: 1.5%, fluorocarbon surfactant: 0.5 percent, modified silicone polyether emulsion foam stabilizer: 2.5%, xanthan gum: 0.15%, konjac powder: 0.05%, hydroxypropyl methylcellulose: 0.05%, benzyl alcohol: 0.05%, water: 91.7 percent;
(2) uniformly stirring the surfactant (lauryl sodium sulfate, lauryl alcohol ether sodium sulfate and fluorocarbon surfactant) and water of the metered foaming foam stabilizer component to form a solution A, and regulating the pH value to 4-5 by using a hydrochloric acid reagent solution with the concentration of 0.1 mol/L; mixing the weighed thickening film-forming agent (xanthan gum, konjak micropowder, hydroxypropyl methylcellulose and benzyl alcohol) and water, and stirring to obtain a non-flocculent solution B; adding the solution B into the solution A, stirring, adding the weighed foam stabilizer (modified silicone polyether emulsion foam stabilizer) into the mixed solution of the solution A and the solution B, and continuously stirring until the solution is uniform to obtain CO 2 A foaming foam stabilizer solution;
(3) the measured CO is 2 Foaming foam stabilizer solution and metered CO 2 The gas enters a foam foaming machine through respective pipelines at the same time, and CO is prepared by adopting a compressed gas method 2 Foaming.
(4)CO 2 Preparing foam slurry:
slurry and CO 2 The foam is prepared simultaneously, the slurry is stirred for 180-240s, and the prepared CO is obtained 2 Foam input prepared uniform slurryStirring the mixture into uniform CO 2 And (3) foaming the slurry, stirring for 240-300s at a stirring speed of 60-80r/min.
(5) Injecting into a mold:
homogeneous CO to be produced 2 And (3) injecting the foam slurry into a mold, standing for 24 hours or performing microwave curing for 2 hours under natural conditions, and performing standard curing for 28 days to obtain the carbon-fixing slag foam concrete wall material.
The carbon-fixing slag foam concrete wall material can be a carbon-fixing slag foam concrete fireproof heat-insulation board, and can also be a carbon-fixing slag foam concrete self-heat-insulation building block or a carbon-fixing slag foam concrete assembled wall board.
When the carbon fixation slag foam concrete fireproof insulation board is prepared, the formula adopted in the raw material metering in the step (1) is the formula of the optimal scheme 1.
According to the application technical specification DBJ/T14-085-2012 of the external thermal insulation system of the external wall of the foaming concrete thermal insulation board, the absolute dry density of the prepared carbon-fixing slag foam concrete fireproof thermal insulation board is tested to be 152-197kg/m 3 28d compressive strength: 0.62-0.97MPa, flexural strength: 0.22-0.24MPa, tensile strength: 0.17-0.19MPa, thermal conductivity coefficient: 0.032-0.037 w/(m.k), water absorption: 4-7%, dry shrinkage value: 0.7-0.8mm/m, freeze-thaw cycle 25 times: mass loss of 1.9-2.7%, strength loss of 5.7-6.1%, softening coefficient: 0.82-0.86, combustion performance: and (A1). Therefore, the carbon-fixing slag foam concrete fireproof insulation board is superior to an organic insulation material in the aspects of strength, durability, fireproof performance, material cost and the like, has better insulation performance than the organic insulation material, is greatly superior to the insulation performance of a foam concrete insulation material taking oxygen, hydrogen or air as foaming gas, and is a low-carbon energy-saving environment-friendly material which can be popularized and applied in a large scale.
When the carbon fixation slag foam concrete assembled wallboard is prepared, the formula adopted by the raw materials in the step (1) is the formula of the optimal scheme 2. The steps (2) to (4) are the same as the preparation method. Before injecting into the mould, laying and placing the wallboard reinforcing material in the mould: firstly, a layer of fiber mesh cloth is coated on the bottom surface of the die, and then two layers of antirust reinforcing mesh sheets are respectively placed according to the requirement of 20mm +/-5 positions away from the surface of the die. When the mixture is injected into the mould,the prepared homogeneous CO 2 And injecting the foam slurry into a mold, leveling by using a scraping rod, and paving a layer of fiber mesh cloth on the foam slurry. Standing for 24 hours under natural conditions, or heating and curing for 2 hours by infrared rays, and performing standard curing for 28 days to obtain the carbon-fixing slag foam concrete assembled wallboard. The schematic cross-sectional structure and schematic view of the carbon-fixing slag foam concrete assembled wallboard are shown in figures 1 and 2.
According to the carbon-fixing slag foam concrete assembled wallboard prepared by the scheme, according to the standard JC/T2475-2018 of the foam concrete wallboard and roof board and the heat conductivity coefficient determination standard GB/T10294-2008 of the heat-insulating material, through tests, the technical performance of the assembled wallboard is that the absolute dry density is 517-629kg/m 3 28d compressive strength: 4.3-5.9MPa, impact resistance: 15-time plate surface has no cracks, and the heat conductivity coefficient is as follows: 0.078-0.087 w/(m.k), water absorption: 4-7%, dry shrinkage value: 0.47-0.54mm/m, freeze-thaw cycle 35 times: 1.3-1.7% of mass loss, 4.1-5.9% of strength loss, 0.86-0.89 of softening coefficient, and sound insulation amount (plate thickness 90-150 mm): 40.6-47dB, hanging force: 1200N, 24h without crack are hung at a single point, and the radioactivity is as follows: ra is more than or equal to 0.47 and less than or equal to 0.52, ir is more than or equal to 0.59 and less than or equal to 0.64, and the combustion performance is A1 grade. Therefore, the carbon-fixing slag foam concrete assembled wallboard is superior to the internal and external leaf steam-cured concrete slab sandwich organic thermal insulation material and the autoclaved aerated concrete slab composite organic thermal insulation material wallboard in the aspects of strength, durability, fire resistance, material cost, production process and the like, and compared with the organic thermal insulation material composite wallboard, under the condition of the same thickness, a single material can meet the building energy-saving requirement, so that the fire hazard safety hazard of a building is greatly reduced; compared with a wall body using a foam concrete wall plate or an autoclaved aerated concrete wall plate as a single material, the wall body can reduce the thickness of the wall body by 70-80mm according to the building energy-saving requirement, save materials and increase the using area of the building, and is a low-carbon energy-saving environment-friendly wall body material which can be popularized and applied in a large scale.
When the carbon fixation slag foam concrete self-insulation building block is prepared, the formula adopted in the raw material metering in the step (1) is the formula of the preferred scheme 2. The preparation method is the same as that of the carbon-fixing slag foam concrete fireproof insulation board.
Prepared carbon-fixing slag foam concrete selfThe heat-insulating building block is tested according to the standard JC/T2550-2019 of the foam concrete self-heat-insulating building block and the heat conductivity coefficient determination standard GB/T10294-2008 of the heat-insulating material, and the absolute dry density is 506-615kg/m 3 28d compressive strength: 4.2-5.7MPa, heat conductivity coefficient: 0.077-0.086 w/(m.k), water absorption: 5-7%, dry shrinkage value: 0.48-0.57mm/m, freeze-thaw cycle 35 times: mass loss 1.3-1.7%, strength loss 2.1-2.9%, softening coefficient: 0.86-0.89, carbonization coefficient: 0.91-0.93; IRa is more than or equal to 0.46 and less than or equal to 0.51 in radioactivity, ir is more than or equal to 0.57 and less than or equal to 0.62 in radioactivity, and the combustion performance is A1 grade. Therefore, the carbon-fixing slag foam concrete self-insulation building block is superior to the existing self-insulation building block formed by compounding concrete or autoclaved aerated concrete and an organic heat-insulation material in the aspects of strength, durability, fireproof performance, material cost, production process and the like, and is a low-carbon energy-saving environment-friendly wall material which can be popularized and applied in a large scale.
In the invention, slag is used as a cementing material, sodium silicate and sodium hydroxide are used as exciting agents, a proper alkali environment can be formed in slurry, and A1-O and Si-O bonds in the slag are rapidly broken and are connected with Ca in the slurry 2+ Hydration products with gelling property such as C-S-H, C-A-S-H and the like are formed by combination, so that the foam concrete wall material has good early strength; the foam concrete product plays the roles of micro-expansion, micro-aggregate and supporting framework by doping the expanding agent, generates the effect of compensating shrinkage and prevents the later-stage foam wall material from cracking; CO2 2 The foaming foam stabilizer is compounded by a plurality of surfactants, thickening film-forming agents and foam stabilizers, so that CO is greatly reduced 2 The solubility of gas prevents foam merging and breaking, and improves CO 2 Foam stability, solving the problem of using CO 2 The problem that the physical foaming method of the foaming gas can not prepare the foam concrete product, and the foam concrete wall material is processed by CO 2 Carbonizing, high strength, high size stability, low water absorption, high durability, certain vacuum inside the product, low heat conductivity, capacity of making the foam concrete wall material possess thermal performance similar to that of organic heat insulating material, and trapped CO 2 The digestion finds a path, and the popularization and application of the method can realize the aim of 'double carbon', and play an active promoting role.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention completely replaces the mineral powder with cementing materials such as cement or cement clinker, and compared with the cement, the slag powder has the advantages that the production process is simplified from two mills and one burning into one mill, the energy consumption and the carbon emission are greatly reduced, a large amount of industrial wastes can be utilized, the energy is saved, the resource exploitation is reduced, and the invention is low-carbon, energy-saving and environment-friendly.
(2) The invention uses CO 2 The foam concrete product is carbonized to improve the compactness, strength, durability and thermal performance of the product, and the captured CO can be greatly absorbed 2 To CO 2 The curing and utilization of the epoxy resin compound explores a new path and makes a positive contribution to realizing the 'double carbon' target proposed by the parties and the countries.
(3) With CO 2 The foam concrete wall material prepared by a physical foaming method of foaming gas has thermal performance superior to that of an organic heat-insulating material, strength, durability, fireproof performance and the like, can greatly show the body in the field of building energy conservation by utilizing the organic heat-insulating material in a large amount, greatly reduces the fire hazard of buildings and ensures that the buildings are safer. Meanwhile, the defects of large heat conductivity coefficient, relatively low strength, poor durability and the like of the prior foam concrete heat-insulating material are overcome, and a new era of scale application of the foam concrete heat-insulating material is developed.
(4) The production process is simple, the energy consumption is low, and compared with the autoclaved aerated concrete production process, the production process can save a large amount of energy and reduce the carbon emission.
Drawings
FIG. 1 is a schematic cross-sectional structure of a carbon-fixing slag foam concrete fabricated wallboard;
FIG. 2 is a schematic view of a carbon-bonded slag foam concrete fabricated wallboard;
in the figure, 1, wall panel; 2. antirust reinforcing mesh sheets; 3. fiber mesh cloth.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The preparation method of the carbon-fixing slag foam concrete fireproof insulation board comprises the following steps:
(1) And (4) metering raw materials. Accurately weighing each raw material of the carbon-fixing slag foam concrete fireproof insulation board, wherein the metering error is less than 0.5%. The mass percentage of each raw material is 650m of specific surface area 2 Slag powder/kg: 39.5%, specific surface area 650m 2 Per kg fly ash: 2.6 percent and the specific surface area is 20000m 2 Silica fume micropowder/kg: 1.8%, calcium sulfoaluminate-calcium oxide: 0.4%, basalt fiber with length of 9 mm: 0.44%, polyacrylamide: 0.007%, baume degree 40, 1.2 modulus water glass: 26.293% and a water reducing rate of 35%: 0.22%, solid content 48%, silicone-acrylic emulsion of pH 8: 0.44%, potassium methylsiliconate: 0.4% of CO 2 Foaming foam stabilizer: 17.4%, water: 10.5 percent.
(2) And (4) preparing slurry.
(1) Weighing mineral powder, fly ash, silica fume micropowder, calcium sulphoaluminate-calcium oxide, basalt fiber and polyacrylamide, mixing and stirring the mixture in a stirrer to form uniform powder, stirring the powder for 180 seconds, and stirring at the speed of 240r/min;
(2) stirring the weighed water glass with the modulus of 1.2 and the Baume degree of 40, the polycarboxylic acid water reducing agent, the silicone-acrylic emulsion, the potassium methyl silanol and the water into uniform mixed liquid in a stirring barrel;
(3) and (3) inputting the uniformly stirred mixed solution obtained in the step (2) into the uniformly stirred powder obtained in the step (1) and stirring the uniformly stirred powder into uniform slurry for 180 seconds at a stirring speed of 180r/min.
(3)CO 2 Foam stabilizer and CO 2 And (4) preparing foam.
(1) Weighing the raw materials. CO2 2 The foaming foam stabilizer comprises the following raw materials in percentage by mass: 3.5%, sodium lauryl alcohol ether sulfate: 1.5%, fluorocarbon surfactant: 0.5%, modified silicone polyether emulsion MPS:2.5%, xanthan gum: 0.15%, konjac powder: 0.05 percentHydroxypropyl methylcellulose: 0.05%, benzyl alcohol: 0.05%, water: 91.7 percent.
(2) Mixing and stirring weighed sodium dodecyl sulfate, sodium dodecyl alcohol ether sulfate, fluorocarbon surfactant and water to obtain a solution A, blending the solution A with a hydrochloric acid reagent solution with the concentration of 0.1mol/L, and regulating the solution to have the pH value of 4.5; mixing and stirring the weighed xanthan gum, the konjac micropowder, the hydroxypropyl methylcellulose, the benzyl alcohol and the water to form a solution B; adding the solution B into the solution A, stirring, adding the weighed modified silicon resin polyether emulsion into the mixed solution of the solution A and the solution B, and continuously stirring until the solution is uniform, thereby obtaining CO 2 Foaming foam stabilizer solution.
(3) Will measure the CO 2 Foaming foam stabilizer solution and metered CO 2 Gas enters a foam foaming machine through a liquid pipeline and a gas pipeline simultaneously, and CO is obtained by a gas compression method 2 And (3) foaming.
(4)CO 2 And preparing foam slurry.
Slurry and CO 2 The foams are prepared simultaneously. The prepared CO is 2 And (3) quickly inputting the foam into the stirred uniform slurry for stirring and mixing, wherein the stirring speed is 60r/min for 240 s.
(5) And (4) injecting into a mold.
The prepared uniform CO 2 And injecting the foam slurry into a mold, curing for 24 hours under natural conditions, demolding, and performing standard curing for 28 days to obtain the carbon-fixing slag foam concrete fireproof insulation board.
The fireproof insulation board is tested according to the application technical specification DBJ/T14-085-2012 of the external thermal insulation system of the external wall of the foamed concrete insulation board, and the technical performance is shown in Table 1.
TABLE 1 technical Properties of carbon-fixing slag foam concrete fireproof heat-insulation board
Figure GDA0003668821540000081
Example 2
The preparation method of the carbon-fixing slag foam concrete fireproof insulation board comprises the following steps:
(1) And (4) metering raw materials. Accurately weighing each raw material of the carbon-fixing slag foam concrete fireproof insulation board, wherein the metering error is less than 0.5%. The mass percentage of each raw material is 650m of specific surface area 2 Slag powder/kg: 42.2% and a specific surface area of 650m 2 Per kg fly ash: 2.8 percent and the specific surface area is 20000m 2 Metakaolin micropowder/kg: 1.89%, calcium sulfoaluminate-calcium oxide: 0.56%, polypropylene fiber 12mm long: 0.47%, polyacrylamide: 0.0072%, water glass with baume degree 40 modulus of 1.5: 28.3% and a water reducing rate of 35%: 0.24%, solid content 50%, styrene-acrylic emulsion of pH 8: 0.47%, sodium methylsiliconate: 0.56%, CO2 foaming foam stabilizer: 11.2%, water: 11.3028 percent.
(2) And (4) preparing slurry.
(1) Mixing and stirring the weighed mineral powder, fly ash, metakaolin micro powder, calcium sulphoaluminate-calcium oxide, polypropylene fiber and humectant in a stirrer into uniform powder, stirring for 180s, wherein the stirring speed is 240r/min;
(2) the weighed water glass with the modulus of 1.5 Baume degree of 40, the polycarboxylic acid water reducing agent, the styrene-acrylic emulsion, the sodium methylsiliconate and the water are stirred in a stirring barrel to form a uniform mixed solution;
(3) and (3) inputting the uniformly stirred mixed liquid in the step (2) into the uniformly stirred powder in the step (1), stirring the uniformly stirred mixed liquid into uniform slurry for 180 seconds, and stirring the slurry at a speed of 180r/min.
(4) CO removal 2 Foam stabilizer and CO 2 And (4) preparing foam.
(1) Weighing the raw materials. CO2 2 The foaming foam stabilizer comprises the following raw materials in percentage by mass: 3.5%, sodium lauryl ether sulfate: 1.5%, fluorocarbon surfactant: 0.5%, foam stabilizer: modified silicone polyether emulsion MPS:2.5%, xanthan gum: 0.15%, konjac powder: 0.05%, hydroxypropyl methylcellulose: 0.05%, benzyl alcohol: 0.05%, water: 91.7 percent.
(2) Mixing and stirring weighed sodium dodecyl sulfate, sodium lauryl ether sulfate, fluorocarbon surfactant and water to obtain a solution A, blending the solution A with a hydrochloric acid reagent solution with the concentration of 0.1mol/L, and regulating the solution to the pH value of 4; will be weighedMixing xanthan gum, konjac micropowder, hydroxypropyl methylcellulose, benzyl alcohol and water, and stirring to obtain a solution B; adding the solution B into the solution A, stirring, adding the weighed modified silicon resin polyether emulsion into the mixed solution of the solution A and the solution B, and continuously stirring until the solution is uniform, thereby obtaining CO 2 Foaming foam stabilizer solution.
(4) The measured CO is 2 Foaming foam stabilizer solution and metered CO 2 Gas enters a foam foaming machine through a liquid pipeline and a gas pipeline simultaneously, and CO is obtained by a gas compression method 2 Foaming.
(4)CO 2 And preparing foam slurry.
Slurry and CO 2 The foams are prepared simultaneously. The prepared CO 2 And (4) quickly inputting the foam into the stirred uniform slurry for stirring and mixing, wherein the stirring speed is 80r/min for 240 s.
(5) And (4) injecting into a mold.
The prepared uniform CO 2 And (3) injecting the foam slurry into a mold, performing microwave curing for 2 hours, demolding, and performing standard curing for 28 days to obtain the carbon-fixing slag foam concrete fireproof insulation board.
The fireproof insulation board is tested according to the application technical specification DBJ/T14-085-2012 of the external thermal insulation system of the external wall of the foamed concrete insulation board, and the technical performance is shown in Table 2.
TABLE 2 technical Properties of carbon fixation slag foam concrete fireproof insulation board
Figure GDA0003668821540000101
Example 3
The preparation method of the carbon-fixing slag foam concrete assembled wallboard comprises the following steps:
(1) And (4) metering raw materials. Accurately weighing each raw material of the carbon-fixing slag foam concrete assembled wallboard foam concrete base material, wherein the metering error is less than 0.5%. The mass percentage of each raw material is 500m of specific surface area 2 Slag powder/kg: 52.5 percent and the specific surface area is 500m 2 Per kg fly ash: 3.5 percent and the specific surface area is 20000m 2 Silica fume/kgMicro-powder: 2.3%, calcium sulfoaluminate-calcium oxide: 0.58%, length of 12mm basalt fiber: 0.12%, polyacrylamide: 0.009%, baume degree 40, 1.2 modulus water glass: 20.451%, polycarboxylic acid water reducing agent with water reducing rate of 35%: 0.29%, solid content 50%, silicone-acrylic emulsion of pH 8: 0.47%, potassium methylsilanolate: 0.58% of CO 2 Foaming foam stabilizer: 5.3%, water: 13.9 percent.
(2) And (4) preparing slurry.
(1) Weighing mineral powder, fly ash, silica fume micropowder, calcium sulphoaluminate-calcium oxide, basalt fiber and polyacrylamide, mixing and stirring the mixture in a stirrer to form uniform powder, stirring the powder for 180 seconds, and stirring at the speed of 240r/min;
(2) stirring the weighed water glass with the modulus of 1.2 and the Baume degree of 40, the polycarboxylic acid water reducing agent, the silicone-acrylic emulsion, the potassium methyl silanol and the water into uniform mixed liquid in a stirring barrel;
(3) and (3) inputting the uniformly stirred mixed liquid in the step (2) into the uniformly stirred powder in the step (1), stirring the uniformly stirred mixed liquid into uniform slurry for 180 seconds, and stirring the slurry at a speed of 180r/min.
(3)CO 2 Foam stabilizer and CO 2 And (4) preparing foam.
(1) Weighing the raw materials. CO2 2 The foaming foam stabilizer comprises the following raw materials in percentage by mass: 3.5%, sodium lauryl alcohol ether sulfate: 1.5%, fluorocarbon surfactant: 0.5%, foam stabilizer: modified silicone polyether emulsion MPS:2.5%, xanthan gum: 0.15%, konjak micropowder: 0.05%, hydroxypropyl methylcellulose: 0.05%, benzyl alcohol: 0.05%, water: 91.7 percent.
(2) Mixing and stirring weighed sodium dodecyl sulfate, sodium dodecyl alcohol ether sulfate, fluorocarbon surfactant and water to obtain a solution A, blending the solution A with a 0.1mol/L hydrochloric acid solution reagent, and regulating the solution to have a pH value of 4.5; mixing and stirring the weighed xanthan gum, the konjac micropowder, the hydroxypropyl methylcellulose, the benzyl alcohol and the water to form a solution B; adding the solution B into the solution A, stirring, adding the weighed modified silicon resin polyether emulsion into the mixed solution of the solution A and the solution B, and continuously stirring until the solution is uniform, thereby obtaining CO 2 Foaming foam stabilizer solution.
(3) The measured CO is 2 Foaming foam stabilizer solution and metered CO 2 Gas enters a foam foaming machine through a liquid pipeline and a gas pipeline simultaneously, and CO is obtained by a gas compression method 2 And (3) foaming.
(4)CO 2 And preparing foam slurry.
Slurry and CO 2 The foams are prepared simultaneously. The prepared CO 2 And (3) quickly inputting the foam into the stirred uniform slurry for stirring and mixing, wherein the stirring speed is 60r/min for 240 s.
(5) And laying and placing the wallboard reinforcing material in the mould.
Laying a layer of alkali-resistant glass fiber mesh on the bottom surface in the die, and then respectively placing antirust reinforcing mesh sheets 20mm +/-5 away from the two surfaces of the plate.
(6) And (4) injecting into a mold.
The prepared uniform CO 2 And (3) injecting the foam slurry into a mold, leveling by using a scraping rod, paving a layer of alkali-resistant glass fiber mesh cloth on the foam slurry, leveling, standing for 24 hours under natural conditions, demolding, and performing standard maintenance for 28 days to obtain the carbon-fixing slag foam concrete assembled wallboard (shown in figure 2). The technical performance of the assembled wallboard is shown in Table 3 after tests according to the foam concrete wallboard and roof board standard JC/T2475-2018 and the thermal conductivity coefficient determination standard GB/T20194 of the thermal insulation material.
TABLE 3 technical Properties of carbon fixation slag foam concrete assembled wallboard
Figure GDA0003668821540000111
Figure GDA0003668821540000121
Example 4
The preparation method of the carbon-fixing slag foam concrete assembled wallboard comprises the following steps:
(1) And (4) metering raw materials. Carbon-fixing slag foam concrete assembled wallboard foam concrete base is accurately weighedThe metering error of each raw material is less than 0.5 percent. The mass percentage of each raw material is 500m of specific surface area 2 Slag powder/kg: 53.4% and a specific surface area of 500m 2 Per kg of fly ash: 3.6 percent and the specific surface area of 20000m 2 (iii) metakaolin micropowder/kg: 2.4%, calcium sulfoaluminate-calcium oxide: 0.59%, polypropylene fiber of 9mm length: 0.12%, polyacrylamide: 0.009%, water glass with baume degree 40 modulus 1.5: 20.621%, water-reducing rate 35%: 0.3%, solid content of 50%, styrene-acrylic emulsion of pH 8: 0.47%, sodium methylsilanolate: 0.59% of CO 2 Foaming foam stabilizer: 3.7%, water: 14.2 percent.
(2) And (4) preparing slurry.
(1) Weighing mineral powder, fly ash, metakaolin micro powder, calcium sulphoaluminate-calcium oxide, polypropylene fiber and polyacrylamide, mixing and stirring the mixture in a stirrer to form uniform powder, stirring the powder for 180 seconds, and stirring the powder at a speed of 240r/min;
(2) the weighed water glass with the modulus of 1.5 Baume degree of 40, the polycarboxylic acid water reducing agent, the styrene-acrylic emulsion, the sodium methylsiliconate and the water are stirred in a stirring barrel to form a uniform mixed solution;
(3) and (3) inputting the uniformly stirred mixed solution obtained in the step (2) into the uniformly stirred powder obtained in the step (1) and stirring the uniformly stirred powder into uniform slurry for 180 seconds at a stirring speed of 180r/min.
(4)CO 2 Foam stabilizer and CO 2 And (4) preparing foam.
(1) Weighing the raw materials. CO2 2 The foaming foam stabilizer comprises the following raw materials in percentage by mass: 3.5%, sodium lauryl ether sulfate: 1.5%, fluorocarbon surfactant: 0.5%, foam stabilizer: modified silicone polyether emulsion MPS:2.5%, xanthan gum: 0.15%, konjak micropowder: 0.05%, hydroxypropyl methylcellulose: 0.05%, benzyl alcohol: 0.05%, water: 91.7 percent.
(3) Mixing and stirring weighed sodium dodecyl sulfate, sodium dodecyl alcohol ether sulfate, fluorocarbon surfactant and water to form a solution A, blending the solution A with a 0.1mol/L hydrochloric acid solution reagent, and regulating the solution to a pH value of 4; mixing xanthan gum, rhizoma Amorphophalli micropowder, hydroxypropyl methylcellulose, benzyl alcohol and water, and stirringSolution B; adding the solution B into the solution A, stirring, adding the weighed modified silicon resin polyether emulsion into the mixed solution of the solution A and the solution B, and continuously stirring until the solution is uniform, thereby obtaining CO 2 A foaming foam stabilizer solution.
(4) Will measure the CO 2 Foaming foam stabilizer solution and metered CO 2 Gas enters a foam foaming machine through a liquid pipeline and a gas pipeline simultaneously, and CO is obtained by a gas compression method 2 Foaming.
(4)CO 2 And preparing foam slurry.
Slurry and CO 2 The foams are prepared simultaneously. The prepared CO is 2 And (4) quickly inputting the foam into the stirred uniform slurry for stirring and mixing, wherein the stirring speed is 80r/min for 240 s.
(5) And laying and placing the wallboard reinforcing material in the mould.
Firstly, laying a layer of basalt fiber mesh cloth on the inner bottom surface of the die, and then respectively placing the anti-rust reinforcing mesh sheets at positions 20mm +/-from the two surfaces of the plate.
(6) And (4) injecting into a mold.
The prepared uniform CO 2 And (3) injecting the foam slurry into a mould, leveling by using a scraping rod, paving a layer of basalt fiber gridding cloth on the foam slurry, leveling, heating and curing for 2 hours by infrared rays, demoulding, and performing standard curing for 28 days to obtain the carbon-fixing slag foam concrete assembled wallboard (shown in figure 2).
The technical performance of the assembled wallboard is shown in table 4 after tests according to the standard JC/T2475-2018 of the foam concrete wallboard and the roof panel.
TABLE 4 technical performance of carbon-fixing slag foam concrete assembled wallboard
Figure GDA0003668821540000131
Example 5
The preparation method of the carbon-fixing slag foam concrete self-insulation building block comprises the following steps:
(1) And (4) metering raw materials. Accurately weighing each original carbon-fixing slag foam concrete self-insulation building blockThe metering error is less than 0.5 percent. The mass percentage of each raw material is 500m of specific surface area 2 Slag powder/kg: 52.5 percent and the specific surface area is 500m 2 Per kg of fly ash: 3.5 percent and the specific surface area of 20000m 2 Silica fume micropowder/kg: 2.3%, calcium sulfoaluminate-calcium oxide: 0.58%, basalt fiber 12mm long: 0.12%, polyacrylamide: 0.009%, water glass with baume degree 40 modulus 1.2: 20.451%, water-reducing rate 35%, polycarboxylic acid water reducing agent: 0.29%, solid content of 50%, silicone-acrylic emulsion of pH value 8: 0.47%, potassium methylsiliconate: 0.58% of CO 2 Foaming foam stabilizer: 5.3%, water: 13.9 percent.
(2) And (4) preparing slurry.
(1) Mixing and stirring the weighed mineral powder, fly ash, silica fume micropowder, calcium sulphoaluminate-calcium oxide, basalt fiber and carboxymethyl cellulose ether in a stirrer into uniform powder, and stirring for 180s at a stirring speed of 240r/min;
(2) stirring the weighed water glass with the modulus of 1.2 and the Baume degree of 40, the polycarboxylic acid water reducing agent, the silicone-acrylic emulsion, the methyl potassium silanol and the water into a uniform mixed solution in a stirring barrel;
(3) and (3) inputting the uniformly stirred mixed liquid in the step (2) into the uniformly stirred powder in the step (1), stirring the uniformly stirred mixed liquid into uniform slurry for 180 seconds, and stirring the slurry at a speed of 180r/min.
(3)CO 2 Foam stabilizer and CO 2 And (4) preparing foam.
(1) Weighing the raw materials. CO2 2 The foaming foam stabilizer comprises the following raw materials in percentage by mass: 3.5%, sodium lauryl alcohol ether sulfate: 1.5%, fluorocarbon surfactant: 0.5%, modified silicone polyether emulsion MPS:2.5%, xanthan gum: 0.15%, konjak micropowder: 0.05%, hydroxypropyl methylcellulose: 0.05%, benzyl alcohol: 0.05%, water: 91.7 percent.
(2) Mixing and stirring weighed sodium dodecyl sulfate, sodium lauryl ether sulfate, fluorocarbon surfactant and water to obtain a solution A, and blending the solution A with a 0.1mol/L hydrochloric acid reagent solution to adjust the pH value of the solution to 4.5; mixing and stirring the weighed xanthan gum, the konjac micropowder, the hydroxypropyl methylcellulose, the benzyl alcohol and the water to form a solution B; will be provided withAdding the solution B into the solution A, stirring, adding the weighed modified silicon resin polyether emulsion into the mixed solution of the solution A and the solution B, and continuously stirring until the solution is uniform, thereby obtaining CO 2 Foaming foam stabilizer solution.
(4) The measured CO is 2 Foaming foam stabilizer solution and metered CO 2 Gas enters a foam foaming machine through a liquid pipeline and a gas pipeline simultaneously, and CO is obtained by a gas compression method 2 And (3) foaming.
(4)CO 2 And preparing foam slurry.
Slurry and CO 2 The foams are prepared simultaneously. The prepared CO is 2 And (4) quickly inputting the foam into the stirred uniform slurry for stirring and mixing, wherein the stirring speed is 60r/min for 240 s.
(5) And (4) injecting into a mold.
The prepared uniform CO 2 And (3) injecting the foam slurry into a mould, standing for 24h under natural conditions, demoulding, and performing standard maintenance for 28d to obtain the required carbon-fixing slag foam concrete self-insulation building block.
According to the standard JC/T2550-2019 of the self-insulation foam concrete block and the heat conductivity coefficient test standard GB/T10294-2008 of the thermal insulation material, the technical performance of the test is shown in Table 5.
TABLE 5 carbon fixation slag foam concrete self-insulation building block technical performance
Figure GDA0003668821540000141
Figure GDA0003668821540000151
Example 6
The preparation method of the carbon-fixing slag foam concrete self-insulation building block comprises the following steps:
(1) And (4) metering raw materials. Accurately weighing each raw material of the carbon-fixing slag foam concrete self-insulation building block, wherein the metering error is less than 0.5%. The mass percentage of each raw material is 500m of specific surface area 2 Slag powder/kg: 534%, specific surface area 500m 2 Per kg fly ash: 3.6 percent and the specific surface area is 20000m 2 Metakaolin micropowder/kg: 2.4%, calcium sulfoaluminate-calcium oxide: 0.59%, polypropylene fiber 12mm long: 0.12%, polyacrylamide: 0.009%, water glass with baume degree 40 modulus 1.5: 20.621%, water-reducing rate 35%: 0.3%, solid content of 50%, styrene-acrylic emulsion of pH 8: 0.47%, sodium methylsilanolate: 0.59% of CO 2 Foaming foam stabilizer: 3.7%, water: 14.2 percent.
(2) And (4) preparing slurry.
(1) Mixing and stirring the weighed mineral powder, fly ash, metakaolin micro powder, calcium sulphoaluminate-calcium oxide, polypropylene fiber and carboxymethyl cellulose ether in a stirrer to form uniform powder, stirring for 180s, wherein the stirring speed is 240r/min;
(2) the weighed water glass with the modulus of 1.5 Baume degree of 40, the polycarboxylic acid water reducing agent, the styrene-acrylic emulsion, the sodium methylsiliconate and the water are stirred in a stirring barrel to form a uniform mixed solution;
(3) and (3) inputting the uniformly stirred mixed solution obtained in the step (2) into the uniformly stirred powder obtained in the step (1) and stirring the uniformly stirred powder into uniform slurry for 180 seconds at a stirring speed of 180r/min.
(4)CO 2 Foam stabilizer and CO 2 And (4) preparing foam.
(1) Weighing the raw materials. CO2 2 The foaming foam stabilizer comprises the following raw materials in percentage by mass: 3.5%, sodium lauryl alcohol ether sulfate: 1.5%, fluorocarbon surfactant: 0.5%, modified silicone polyether emulsion MPS:2.5%, xanthan gum: 0.15%, konjak micropowder: 0.05%, hydroxypropyl methylcellulose: 0.05%, benzyl alcohol: 0.05%, water: 91.7 percent.
(2) Mixing and stirring weighed sodium dodecyl sulfate, sodium dodecyl alcohol ether sulfate, fluorocarbon surfactant and water to obtain a solution A, blending the solution A with a hydrochloric acid reagent solution with the concentration of 0.1mol/L, and regulating the solution to the pH value of 4; mixing and stirring the weighed xanthan gum, the konjac micropowder, the hydroxypropyl methylcellulose, the benzyl alcohol and the water to form a solution B; adding the solution B into the solution A, stirring, adding the weighed modified silicon resin polyether emulsion into the solution A and the solution B, and mixing and dissolvingStirring in the liquid until the solution is homogeneous, thereby obtaining CO 2 Foaming foam stabilizer solution.
(3) Will measure the CO 2 Foaming foam stabilizer solution and metered CO 2 Gas enters a foam foaming machine through a liquid pipeline and a gas pipeline simultaneously, and CO is obtained by a gas compression method 2 Foaming.
(4)CO 2 And preparing foam slurry.
Slurry and CO 2 The foams are prepared simultaneously. The prepared CO is 2 And (4) quickly inputting the foam into the stirred uniform slurry for stirring and mixing, wherein the stirring speed is 80r/min for 240 s.
(5) And (4) injecting into a mold.
The prepared uniform CO 2 And (3) injecting the foam slurry into a mold, performing microwave curing for 2h, demolding, and performing standard curing for 28d to obtain the carbon-fixing slag foam concrete self-insulation building block.
According to the standard JC/T2550-2019 of the self-insulation foam concrete block and the heat conductivity coefficient test standard GB/T10294-2008 of the thermal insulation material, the technical performance is tested and shown in Table 6.
TABLE 6 technical Properties of carbon fixation slag foam concrete self-insulation building block
Figure GDA0003668821540000161
The present invention is not limited to the above-described embodiments. The particular embodiments described above are illustrative only and not limiting. The invention is not limited to the embodiments described above, but may be modified in many ways within the scope of the appended claims.

Claims (6)

1. The carbon-fixing slag foam concrete wall material is characterized in that: the material is prepared from the following raw materials in percentage by mass: slag powder: 39.5-53.4%, fly ash: 2.6-3.6%, superfine powder: 1.8-2.4%, swelling agent: 0.4-0.59%, fiber: 0.12-0.47%, humectant: 0.007-0.009%, jiA hair agent: 20.4-28.3%, water reducing agent: 0.22-0.3%, polymer emulsion: 0.44-0.47%, water-proofing agent: 0.4-0.59%, CO 2 Foaming foam stabilizer: 3.7-17.4%, water: 10.4-14.2%;
CO 2 the foaming foam stabilizer is a solution formed by mixing a surfactant, a foam stabilizer, a thickening film-forming agent and water, and the foaming foam stabilizer comprises the following components in percentage by mass: 3.5-8.5% of surfactant, 0.5-4.5% of foam stabilizer, 0.1-0.6% of thickening film-forming agent and 86.4-95.9% of water; the surfactant is a mixture of sodium dodecyl sulfate, sodium dodecyl alcohol ether sulfate and a fluorocarbon surfactant, the mass ratio of the sodium dodecyl sulfate to the sodium dodecyl alcohol ether sulfate to the fluorocarbon surfactant is (7); the foam stabilizer is modified silicone polyether emulsion; the thickening film-forming agent is a mixture of xanthan gum, konjac micropowder, hydroxypropyl methylcellulose and benzyl alcohol, and the mass ratio of the xanthan gum, the konjac micropowder, the hydroxypropyl methylcellulose to the benzyl alcohol is 3;
the expanding agent is calcium sulphoaluminate-calcium oxide expanding agent; the fiber is one of polypropylene fiber or basalt fiber, and the length of the fiber is 9-12mm; the humectant is polyacrylamide humectant; the excitant is an alkaline solution prepared from sodium silicate and sodium hydroxide, the modulus is 1.2-1.5, and the baume degree is 40; the water reducing agent is a polycarboxylic acid water reducing agent, the solid content is 40 percent, and the water reducing rate is 25 to 35 percent; the polymer emulsion is one of silicone-acrylic emulsion, pure acrylic emulsion or styrene-acrylic emulsion, the solid content is 48-52%, and the pH value is 7-8; the waterproof agent is one of methyl silicon alcohol potassium, methyl silicon alcohol sodium or ammonium stearate emulsion.
2. The carbon-fixing slag foam concrete wall material according to claim 1, wherein: the material is prepared from the following raw materials in percentage by mass: slag powder: 39.5-42.2%, fly ash: 2.6-2.8%, superfine powder: 1.8-1.89%, swelling agent: 0.4-0.56%, fiber: 0.44-0.47%, humectant: 0.007-0.0072%, excitant: 26.3-28.3%, water reducing agent: 0.22-0.24%, polymer emulsion: 0.44-0.47%, water repellent: 0.4-0.56%, CO 2 Foaming foam stabilizer: 11.2-17.4%, water: 10.4 to 11.4 percent.
3. The carbon-fixing slag foam concrete wall material according to claim 1, wherein: the material is prepared from the following raw materials in percentage by mass: slag powder: 52.5-53.4%, fly ash: 3.5-3.6%, superfine powder: 2.3-2.4%, swelling agent: 0.58-0.59%, fiber: 0.12%, humectant: 0.009%, excitant: 20.4-20.8%, water reducing agent: 0.29-0.3%, polymer emulsion: 0.47%, water repellent: 0.58-0.59% of CO 2 Foaming foam stabilizer: 3.7-5.3%, water: 13.9 to 14.2 percent.
4. The carbon-fixing slag foam concrete wall material according to claim 1, wherein: CO2 2 Foaming foam stabilizer and CO 2 Gas is used for preparing CO in a foam foaming machine by adopting a compressed gas method 2 And (3) foaming.
5. The carbon-fixing slag foam concrete wall material according to claim 1, wherein: the slag powder is granulated blast furnace slag powder, has an activity index of S105 or S95, and has a specific surface area of 400-650m 2 Per kg; the fly ash is grade 1 ash, and the specific surface area of the fly ash is 400-650m 2 Per kg; the superfine powder is silica fume micropowder or metakaolin micropowder, and has a specific surface area of 20000m or more 2 /kg。
6. A method for preparing the carbon-fixing slag foam concrete wall material according to any one of claims 1 to 5, which is characterized in that: the method comprises the following steps:
(1) Raw material metering: measuring the adopted raw materials according to the formula;
(2) Preparing slurry: mixing and stirring the slag powder, the fly ash, the superfine powder, the expanding agent, the humectant and the fiber into uniform powder; mixing and stirring an excitant, a water reducing agent, polymer emulsion, a waterproof agent and water into a uniform solution; adding the uniform solution into the uniform powder, and stirring to form uniform slurry;
(3)CO 2 foam preparation: introducing CO 2 Foaming foam stabilizer and metered CO 2 The gas enters a foam foaming machine through respective pipelines at the same time, and CO is prepared by a gas compression method 2 Foaming;
(4)CO 2 preparing foam slurry: stirring the slurry for 180-240s, and adding CO 2 Inputting foam into the prepared uniform slurry, and stirring for 240-300s to obtain uniform CO 2 A foam slurry;
(5) Injecting into a mold: will homogenize CO 2 And injecting the foam slurry into a mold, and maintaining to obtain the solid carbon slag foam concrete wall material.
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