CN115419209B - Concrete prefabricated wallboard and preparation method and application thereof - Google Patents
Concrete prefabricated wallboard and preparation method and application thereof Download PDFInfo
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- CN115419209B CN115419209B CN202210959126.6A CN202210959126A CN115419209B CN 115419209 B CN115419209 B CN 115419209B CN 202210959126 A CN202210959126 A CN 202210959126A CN 115419209 B CN115419209 B CN 115419209B
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- 239000004567 concrete Substances 0.000 title claims abstract description 81
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 113
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 64
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims abstract description 40
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 32
- 239000011159 matrix material Substances 0.000 claims abstract description 31
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 29
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000391 magnesium silicate Substances 0.000 claims abstract description 7
- 229910052919 magnesium silicate Inorganic materials 0.000 claims abstract description 7
- 235000019792 magnesium silicate Nutrition 0.000 claims abstract description 7
- 239000000378 calcium silicate Substances 0.000 claims abstract description 6
- 229910052918 calcium silicate Inorganic materials 0.000 claims abstract description 6
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 239000002002 slurry Substances 0.000 claims description 57
- 238000003756 stirring Methods 0.000 claims description 51
- 239000002699 waste material Substances 0.000 claims description 51
- 239000000203 mixture Substances 0.000 claims description 45
- 239000002893 slag Substances 0.000 claims description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 239000003638 chemical reducing agent Substances 0.000 claims description 22
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 22
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 22
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 22
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 22
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 19
- 239000003469 silicate cement Substances 0.000 claims description 19
- 239000000835 fiber Substances 0.000 claims description 15
- 239000010456 wollastonite Substances 0.000 claims description 15
- 229910052882 wollastonite Inorganic materials 0.000 claims description 15
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 14
- 229910052839 forsterite Inorganic materials 0.000 claims description 14
- 238000003892 spreading Methods 0.000 claims description 14
- 230000007480 spreading Effects 0.000 claims description 14
- 239000004743 Polypropylene Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- -1 polypropylene Polymers 0.000 claims description 13
- 229920001155 polypropylene Polymers 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 12
- 239000011324 bead Substances 0.000 claims description 11
- 239000013530 defoamer Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000004575 stone Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 240000007817 Olea europaea Species 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000005416 organic matter Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 10
- 238000003763 carbonization Methods 0.000 abstract description 10
- 230000007774 longterm Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000008929 regeneration Effects 0.000 abstract 2
- 238000011069 regeneration method Methods 0.000 abstract 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract 1
- 229910052791 calcium Inorganic materials 0.000 abstract 1
- 239000011575 calcium Substances 0.000 abstract 1
- 239000011435 rock Substances 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 12
- 238000000465 moulding Methods 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000011398 Portland cement Substances 0.000 description 8
- 239000004568 cement Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 239000004566 building material Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- SLINHMUFWFWBMU-UHFFFAOYSA-N Triisopropanolamine Chemical group CC(O)CN(CC(C)O)CC(C)O SLINHMUFWFWBMU-UHFFFAOYSA-N 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920005646 polycarboxylate Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910021487 silica fume Inorganic materials 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 125000005375 organosiloxane group Chemical group 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0092—Machines or methods for applying the material to surfaces to form a permanent layer thereon to webs, sheets or the like, e.g. of paper, cardboard
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/40—Mixing specially adapted for preparing mixtures containing fibres
- B28C5/402—Methods
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
-
- 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
- C04B2111/22—Carbonation resistance
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a concrete prefabricated wallboard, a preparation method and application thereof, comprising a concrete matrix layer; the regenerated gel material layer is arranged on the surface of the concrete matrix layer; a carbon absorbing layer; the gel material layer is arranged on the surface of the regenerated gel material layer; the preparation raw materials of the regenerated gel material layer comprise silicate powder; the preparation raw materials of the carbon absorbing layer comprise silicate powder and silicate aggregate; the components of the silicate powder and silicate aggregate independently include magnesium silicate and/or calcium silicate. According to the invention, the gel material regeneration layer and the porous carbon absorption layer are sequentially arranged on the concrete matrix layer, and the calcium-rich magnesium silicate powder in the gel regeneration layer has the effects of quickly absorbing carbon dioxide, preventing the concrete matrix layer from being corroded by carbon dioxide by carbonization, and improving the durability; the porous carbon absorbing layer has the function of absorbing carbon dioxide during long-term service and providing a decorative surface with natural rock texture, and the prefabricated wallboard can absorb carbon dioxide in air greatly during short-term and long-term service.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to a concrete prefabricated wallboard, and a preparation method and application thereof.
Background
The building material industry is the industry with serious carbon emission, and a large amount of CO is generated in the cement production process 2 1 ton of ordinary Portland cement is produced, and about 0.8 ton of CO is discharged 2 The industrial carbon reduction pressure is huge; the existing low-carbon concrete technology mainly replaces part of cement by doping a large amount of mineral admixture, such as doping fly ash, mineral powder, silica fume and the like, but the cementing material taking cement as a core cannot be replaced in the expected future, so that even if the fly ash, mineral powder, silica fume and the like are used for replacing part of cement in a cementing system, the carbon emission corresponding to the concrete is only limited to be reduced, and carbon neutralization and even negative carbon cannot be achieved. Therefore, innovative technical means are needed to reduce the energy consumption of the concrete in the production process and the carbon emission in the production process.
Therefore, there is a need to provide a new concrete prefabricated wall panel that can effectively absorb carbon dioxide, thereby achieving "carbon negative".
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first aspect of the present invention proposes a concrete prefabricated wall panel capable of absorbing carbon dioxide in the atmosphere during the service life of a concrete element.
The second aspect of the invention also provides a method for preparing the concrete prefabricated wallboard.
The third aspect of the invention also provides the use of a concrete prefabricated wall panel.
An embodiment of a first aspect of the present invention provides a concrete prefabricated wall panel, a concrete matrix layer;
the regenerated gel material layer is arranged on the surface of the concrete matrix layer;
a carbon absorbing layer; the regenerated gel material layer is arranged on the surface of the regenerated gel material layer;
the preparation raw materials of the regenerated gel material layer comprise silicate powder;
the preparation raw materials of the carbon absorbing layer comprise silicate powder and silicate aggregate;
the components of the silicate powder and the silicate aggregate independently comprise magnesium silicate and/or calcium silicate.
The concrete prefabricated wallboard provided by the embodiment of the invention has at least the following beneficial effects:
according to the invention, a regenerated gel material layer and a carbon absorbing layer are sequentially arranged on a concrete substrate layer, and the silica powder in the gel regenerated layer has the effect of quickly absorbing carbon dioxide; the carbon absorbing layer is used for absorbing carbon dioxide, preventing the concrete matrix layer from being corroded by carbon dioxide during carbonization, and improving durability. The prefabricated wallboard can greatly absorb carbon dioxide in the air in short-term and long-term service periods.
According to some embodiments of the invention, the silicate powder has an average particle size of 40 μm to 70 μm. Therefore, the reaction rate and the reaction proportion of the silicate powder for absorbing carbon dioxide are high, when the particle size range is smaller than the particle size range, the grinding energy consumption is overlarge, the mixing water required by the paint is increased, and the film forming strength of the paint is reduced; when the particle diameter is larger than this range, the reaction rate and the reaction ratio of carbon dioxide absorption decrease.
According to some embodiments of the invention, the silicate aggregate has a particle size of 5mm to 10mm single size fraction. Thus, the coarse aggregate can form porous concrete, the specific surface area increases, the reaction contact with carbon dioxide increases, and the carbon absorption rate increases.
According to some embodiments of the invention, the thickness of the regenerated gel material layer is 2-4 cm. Thereby, the carbon dioxide in the air can enter the deep layer of the regenerated gel layer, and if too thick, the carbon dioxide can only react with the surface of the regenerated gel layer.
According to some embodiments of the invention, the carbon-absorbing layer has a thickness of 2-4 cm. Thereby, carbon dioxide in the air can enter the deep layer of the carbon absorbing layer and the regenerated gel material layer.
According to some embodiments of the invention, the concrete base layer is commercially available concrete, and the reference number is not lower than C30.
According to some embodiments of the invention, the regenerated gel material layer comprises the following components in parts by weight:
80-140 parts of silicate powder, 100-160 parts of silicate cement, 60-80 parts of waste residue powder, 60-100 parts of granulated blast furnace slag powder, 0.05-0.2 part of hydroxypropyl methyl cellulose ether, 160-175 parts of waste slurry water, 5-7.5 parts of water reducer, 30-65 parts of glass microsphere, 5-9.5 parts of polypropylene fiber, 3-4.5 parts of defoamer and 4-5.5 parts of early strength agent.
According to some embodiments of the invention, the porous carbon-adsorbing layer comprises the following components in parts by weight:
80-140 parts of silicate powder, 100-160 parts of silicate cement, 60-80 parts of waste residue powder, 60-100 parts of granulated blast furnace slag powder, 0.05-0.2 part of hydroxypropyl methyl cellulose ether, 150-165 parts of waste slurry, 5-7.5 parts of water reducer and 800-1100 parts of silicate aggregate.
According to some embodiments of the invention, the silicate aggregate comprises at least 90wt% magnesium silicate and/or calcium silicate, for example, the silicate aggregate comprises at least one of serpentine aggregate, magnesium olive aggregate, wollastonite aggregate.
According to some embodiments of the invention, the magnesium silicate and/or calcium silicate content in the silicate powder is not less than 90wt%, for example, the silicate powder comprises at least one of serpentine powder, forsterite powder, wollastonite powder.
According to some embodiments of the invention, the Portland cement is commercially available low-heat Portland cement, and meets the standard technical requirements of national standard GBT200-2017 moderate-heat Portland cement and low-heat Portland cement.
According to some embodiments of the invention, the waste residue powder is ground from waste residues precipitated from a ready-mix plant, and has an average particle size of less than 70um. The chemical composition of the waste slag powder is SiO 2 30％-45％，CaO10％-20％，Al 2 O 3 30％-35％，MgO 0～4.5％，Fe 2 O 3 0-5.0%, organic matter 0-10%, other oxides and 100% of the total components.
Specifically, the composition content of the waste slag powder of the factory station of the Hunan Limited company of the West China construction is shown in table 1.
TABLE 1 chemical composition of waste slag powder
According to some embodiments of the invention, the granulated blast furnace slag powder is slag powder for commercial concrete, and meets the technical requirement of S95 grade in GB/T18046-2017 granulated blast furnace slag powder for cement, mortar and concrete.
According to some embodiments of the invention, the content of particles smaller than 150 μm in the hydroxypropyl methylcellulose ether is not less than 98%. Therefore, the hydroxypropyl methyl cellulose ether is dissolved in alkaline water, plays good thickening, homogenizing, dispersing and stabilizing roles, and can enhance the early strength of the cementing material.
According to some embodiments of the invention, the waste slurry is obtained by homogenizing, precipitating, press filtering and other methods of waste water generated by concrete production in a ready-mixed concrete plant, wherein the pH value of the waste slurry is 9.0-13.0, the density is 1.07g/cm < 3 >, and the concentration is 15.0%. Thus, the waste slurry is effective to activate the pozzolanic activity of the granulated blast furnace slag to produce cementitious properties.
According to some embodiments of the invention, the water reducing agent is a polycarboxylate water reducing agent, the pH value is 5-8, and the water reducing rate is not lower than 20%.
According to some embodiments of the invention, the glass beads have an average particle size of less than 30 μm; the particle size distribution is 0-40 mu m.
According to some embodiments of the invention, the polypropylene fibers have a length of 8mm to 14mm and an elastic modulus of not less than 3900N/mm. The polypropylene fiber forms a fiber net structure in the low-temperature cement-based cementing material, so that cracking of the cementing material during service is effectively prevented.
According to some embodiments of the invention, the defoamer is a silicone defoamer.
According to some embodiments of the invention, the early strength agent is triisopropanolamine early strength agent.
According to a second aspect of the present invention there is provided a method of making a concrete prefabricated wall panel comprising the steps of:
s120, weighing components of the regenerated gel layer according to a proportion, stirring to obtain first slurry, pouring the first slurry on the upper surface of the concrete matrix layer, trowelling, and pouring the thickness to be 2.0-4.0 cm;
s130, weighing the components of the carbon absorbing layer according to a proportion, stirring to obtain second slurry, spreading and pouring the second slurry on the surface of the regenerated rubber material layer, spreading in a vibrating manner, and paving the thickness of 2.0-4.0cm to obtain the concrete prefabricated wallboard.
According to some embodiments of the invention, the concrete matrix layer is prepared as follows:
s110, pouring fresh concrete in the template, vibrating to compact and trowelling the molding surface to enable the molding surface to be parallel to the horizontal plane, wherein the concrete mark number is not lower than C30.
According to some embodiments of the invention, the method of preparing the first slurry comprises the steps of:
s121, mixing silicate powder, silicate cement, waste slag powder, granulated blast furnace slag powder, hydroxypropyl methyl cellulose ether, glass beads and polypropylene fibers to obtain a first mixture;
and S122, stirring the waste slurry, the water reducer, the defoamer, the early strength agent and the first mixture to obtain first slurry.
According to some embodiments of the invention, the method of preparing the second slurry comprises the steps of:
s131, stirring the weighed silicate powder, silicate cement, waste slag powder, granulated blast furnace slag powder and hydroxypropyl methyl cellulose ether; obtaining a second mixture;
s132, stirring the waste slurry, the water reducer and the second mixture to obtain a third mixture;
and S133, stirring the silicate aggregate and the third mixture to obtain second slurry.
According to some embodiments of the invention, the stirring speed in step S120 is 60-120 r/min.
According to some embodiments of the invention, the stirring speed in step S130 is 60-120 r/min.
A third aspect of the present invention provides the use of a precast concrete wall panel as described above for absorbing carbon dioxide.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a concrete prefabricated wall panel of example 1;
wherein 1 is denoted as a concrete matrix layer; 2 is denoted as a layer of regenerated gel material; 3 is denoted as a carbon-absorbing layer.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the embodiments, but the present invention is not limited to these embodiments.
The reagents, methods and apparatus employed in the present invention, unless otherwise specified, are all conventional in the art.
The starting materials for the examples and comparative examples are as follows:
and (3) concrete: XW type example 1 of Hunan Co., ltd., west construction of well-established China: c30; example 2: c35; examples 3 to 5: c40;
forsterite powder: the average particle diameter is 45um;
serpentine powder is: average particle diameter 48um;
wollastonite powder: the average particle diameter was 42.5um;
portland cement: the commercial P.LH42.5 low-heat silicate cement produced by the special cement Co-Ltd of the stone gate of the Ge Zhou dam meets the standard technical requirements of the national standard GBT200-2017 moderate-heat silicate cement and low-heat silicate cement;
waste slag powder: the waste residue of the factory station of the Hunan Limited company of the West construction of the middle building is ground into fine powder, and the average grain diameter is 46.8um; the oxide composition is SiO 2 32.57％，CaO11.84％，Al 2 O 3 32.24％，MgO 2.62％，Fe 2 O 3 2.57%, organic matter 5.92%, other oxides 12.24%, total 100% of all components;
granulating blast furnace slag powder: s95 grade slag powder produced by Yiyang Dingsheng novel building materials limited company accords with S95 grade technical requirements in GB/T18046-2017 granulated blast furnace slag powder for cement, bone slurry and concrete;
hydroxypropyl methyl cellulose ether: ZJ-7015 hydroxypropyl methyl cellulose ether sold by Jiangsu Megao building materials science and technology Co., ltd, wherein the particle content of less than 150um is not less than 98%;
waste slurry water: waste water produced by concrete production of Hunan Limited company in Western construction of middle building is subjected to homogenization, precipitation, filter pressing and other methods to obtain waste slurry, wherein pH value is 12, and density is 1.02g/cm 3 Concentration = 5.5%;
water reducing agent: high-performance polycarboxylate water reducer produced by Yueyang eastern rainbow waterproof technology Co., ltd., pH value=6, water reduction rate=25%;
glass beads: 2046H type hollow glass beads sold by external electric International chemical industry Co., ltd., average particle diameter of 20um, particle size distribution of 12-29um;
polypropylene fibers: crack-resistant toughened polypropylene fiber produced by Shandong Xin chemical industry Co Ltd, wherein the fiber length is 8-14mm, and the elastic modulus is more than 3900N/mm;
defoaming agent: aqueous organosiloxane type powder defoamer produced by Guangdong south novel materials Co., ltd;
early strength agent: commercial 354-6 triisopropanolamine early strength agent produced by Jinan Zhongchun chemical industry Co., ltd;
forsterite aggregate: the technical requirements of single-particle-size-grade broken stone of 5-10 mm are class I, and all the technical requirements meet the class I broken stone requirements in GBT 14685-2011 pebble for construction;
serpentine aggregate: the technical requirements of single-particle-size-grade broken stone of 5-10 mm are class I, and all the technical requirements meet the class I broken stone requirements in GBT 14685-2011 pebble for construction;
wollastonite aggregate: the technical requirements of single-particle-size-grade broken stone with the diameter of 5-10 mm are I class, and all technical requirements meet the I class broken stone requirements in GBT 14685-2011 pebble for construction.
Example 1
Example 1 provides a concrete prefabricated wall panel, the component content of which is shown in table 1, the structural schematic diagram of which is shown in fig. 1, wherein 1 is represented as a concrete matrix layer; 2 is denoted as a layer of regenerated gel material; 3 is denoted as a carbon-absorbing layer, and is prepared by the following method:
s110, pouring fresh concrete in the template, vibrating to compact and trowelling the molding surface, and enabling the molding surface to be parallel to the horizontal plane to obtain the concrete matrix layer.
S121, mixing silicate powder, silicate cement, waste slag powder, granulated blast furnace slag powder, hydroxypropyl methyl cellulose ether, glass beads and polypropylene fibers for 2min at a mixing speed of 100r/min to obtain a first mixture;
s122, stirring the waste slurry, the water reducer, the defoamer, the early strength agent and the first mixture for 2min at a stirring speed of 100r/min to obtain first slurry;
s120, pouring the first slurry on the upper surface of the concrete matrix layer, trowelling, and pouring the thickness to be 3cm;
s131: stirring the weighed silicate powder, silicate cement, waste slag powder, granulated blast furnace slag powder and hydroxypropyl methyl cellulose ether for 2min at a stirring speed of 100r/min to obtain a second mixture;
s132, stirring the waste slurry, the water reducer and the second mixture for 1min at a stirring speed of 100r/min to obtain a third mixture;
s133, stirring the silicate aggregate and the third mixture for 4min at a stirring speed of 100r/min to obtain second slurry;
and S130, spreading and pouring the second slurry on the surface of the reclaimed rubber material layer, spreading in a vibrating manner, and paving the thickness of 3cm to obtain the concrete prefabricated wallboard.
Example 2
Example 2 provides a concrete prefabricated wall panel, the component content of which is shown in table 1, and the preparation method is as follows:
s110, pouring fresh concrete in the template, vibrating to compact and trowelling the molding surface, and enabling the molding surface to be parallel to the horizontal plane to obtain the concrete matrix layer.
S121, mixing silicate powder, silicate cement, waste slag powder, granulated blast furnace slag powder, hydroxypropyl methyl cellulose ether, glass beads and polypropylene fibers for 2min at a mixing speed of 100r/min to obtain a first mixture;
s122, stirring the waste slurry, the water reducer, the defoamer, the early strength agent and the first mixture for 2min at a stirring speed of 100r/min to obtain first slurry;
s120, pouring the first slurry on the upper surface of the concrete matrix layer, trowelling, and pouring the thickness to be 3cm;
s131: stirring the weighed silicate powder, silicate cement, waste slag powder, granulated blast furnace slag powder and hydroxypropyl methyl cellulose ether for 2min at a stirring speed of 100r/min to obtain a second mixture;
s132, stirring the waste slurry, the water reducer and the second mixture for 1min at a stirring speed of 100r/min to obtain a third mixture;
s133, stirring the silicate aggregate and the third mixture for 4min at a stirring speed of 100r/min to obtain second slurry;
and S130, spreading and pouring the second slurry on the surface of the reclaimed rubber material layer, spreading in a vibrating manner, and paving the thickness of 3cm to obtain the concrete prefabricated wallboard.
Example 3
Example 3 provides a concrete prefabricated wall panel, the component content of which is shown in table 1, and the preparation method is as follows:
s110, pouring fresh concrete in the template, vibrating to compact and trowelling the molding surface, and enabling the molding surface to be parallel to the horizontal plane to obtain the concrete matrix layer.
S121, mixing silicate powder, silicate cement, waste slag powder, granulated blast furnace slag powder, hydroxypropyl methyl cellulose ether, glass beads and polypropylene fibers for 2min at a mixing speed of 100r/min to obtain a first mixture;
s122, stirring the waste slurry, the water reducer, the defoamer, the early strength agent and the first mixture for 2min at a stirring speed of 100r/min to obtain first slurry;
s120, pouring the first slurry on the upper surface of the concrete matrix layer, trowelling, and pouring the thickness to be 3cm;
s131: stirring the weighed silicate powder, silicate cement, waste slag powder, granulated blast furnace slag powder and hydroxypropyl methyl cellulose ether for 2min at a stirring speed of 100r/min to obtain a second mixture;
s132, stirring the waste slurry, the water reducer and the second mixture for 1min at a stirring speed of 100r/min to obtain a third mixture;
s133, stirring the silicate aggregate and the third mixture for 4min at a stirring speed of 100r/min to obtain second slurry;
and S130, spreading and pouring the second slurry on the surface of the reclaimed rubber material layer, spreading in a vibrating manner, and paving the thickness of 3cm to obtain the concrete prefabricated wallboard.
Example 4
Example 4 provides a concrete prefabricated wall panel, the component contents of which are shown in table 1, and the preparation method is as follows:
s110, pouring fresh concrete in the template, vibrating to compact and trowelling the molding surface, and enabling the molding surface to be parallel to the horizontal plane to obtain the concrete matrix layer.
S121, mixing silicate powder, silicate cement, waste slag powder, granulated blast furnace slag powder, hydroxypropyl methyl cellulose ether, glass beads and polypropylene fibers for 2min at a mixing speed of 100r/min to obtain a first mixture;
s122, stirring the waste slurry, the water reducer, the defoamer, the early strength agent and the first mixture for 2min at a stirring speed of 100r/min to obtain first slurry;
s120, pouring the first slurry on the upper surface of the concrete matrix layer, trowelling, and pouring the thickness to be 3cm;
s131: stirring the weighed silicate powder, silicate cement, waste slag powder, granulated blast furnace slag powder and hydroxypropyl methyl cellulose ether for 2min at a stirring speed of 100r/min to obtain a second mixture;
s132, stirring the waste slurry, the water reducer and the second mixture for 1min at a stirring speed of 100r/min to obtain a third mixture;
s133, stirring the silicate aggregate and the third mixture for 4min at a stirring speed of 100r/min to obtain second slurry;
and S130, spreading and pouring the second slurry on the surface of the reclaimed rubber material layer, spreading in a vibrating manner, and paving the thickness of 3cm to obtain the concrete prefabricated wallboard.
Example 5
Example 5 provides a concrete prefabricated wall panel, the component contents of which are shown in table 1, and the preparation method is as follows:
s110, pouring fresh concrete in the template, vibrating to compact and trowelling the molding surface, and enabling the molding surface to be parallel to the horizontal plane to obtain the concrete matrix layer.
S121, mixing silicate powder, silicate cement, waste slag powder, granulated blast furnace slag powder, hydroxypropyl methyl cellulose ether, glass beads and polypropylene fibers for 2min at a mixing speed of 100r/min to obtain a first mixture;
s122, stirring the waste slurry, the water reducer, the defoamer, the early strength agent and the first mixture for 2min at a stirring speed of 100r/min to obtain first slurry;
s120, pouring the first slurry on the upper surface of the concrete matrix layer, trowelling, and pouring the thickness to be 3cm;
s131: stirring the weighed silicate powder, silicate cement, waste slag powder, granulated blast furnace slag powder and hydroxypropyl methyl cellulose ether for 2min at a stirring speed of 100r/min to obtain a second mixture;
s132, stirring the waste slurry, the water reducer and the second mixture for 1min at a stirring speed of 100r/min to obtain a third mixture;
s133, stirring the silicate aggregate and the third mixture for 4min at a stirring speed of 100r/min to obtain second slurry;
and S130, spreading and pouring the second slurry on the surface of the reclaimed rubber material layer, spreading in a vibrating manner, and paving the thickness of 3cm to obtain the concrete prefabricated wallboard.
The component contents of examples 1 to 5 are shown in Table 1.
TABLE 1 component content (parts) of the regenerated gelling material layers in examples 1 to 5
TABLE 2 component content (parts) of porous carbon-adsorbing layers in examples 1 to 5
Comparative example 1
Only the matrix layer and the regenerated rubber layer, no porous carbon absorbing layer exists, and the component content (parts) of the regenerated rubber layer is shown in table 3:
TABLE 3 component content (parts) of the reclaimed rubber layer of comparative example 1
| Regenerated gel material layer composition | Comparative example 1 |
| Magnesium olive powder | 100 |
| Portland cement | 120 |
| Waste slag powder | 100 |
| Granulated blast furnace slag powder | 80 |
| Hydroxypropyl methyl cellulose ether | 0.1 |
| Waste slurry | 165 |
| Water reducing agent | 5.5 |
| Glass bead | 45 |
| Polypropylene fiber | 6 |
| Defoaming agent | 3.5 |
| Early strength agent | 4.5 |
Comparative example 2
Only the matrix layer and the porous carbon-absorbing layer, no regenerated gel material layer, and the component content (parts) of the porous carbon-absorbing layer are shown in table 4:
TABLE 4 component content (parts) of porous carbon-adsorbing layer in comparative example 2
| Component (A) | Comparative example 2 |
| Forsterite powder | 140 |
| Forsterite aggregate | 1050 |
| Portland cement | 160 |
| Waste slag powder | 60 |
| Granulated blast furnace slag powder | 60 |
| Hydroxypropyl methyl cellulose ether | 0.1 |
| Waste slurry | 155 |
| Water reducing agent | 6.5 |
Performance testing
Calculation of carbon dioxide:
different silicate minerals have different formulas for absorbing carbon dioxide and different amounts of carbon dioxide are required, and when the minerals are fully involved in the reaction, serpentine can absorb 48% of their own mass, forsterite can absorb 63% of its own mass, and wollastonite can absorb 38% of its own mass.
In the calculation of the embodiment of the invention, only the mass of carbon dioxide absorbed by silicate ore powder and silicate aggregate is calculated, and in the calculation, the reaction degree of the silicate ore powder is calculated as 80%. The silicate aggregate has a relatively slow reaction rate with carbon dioxide because of a relatively coarse average particle size, and reacts all the time within the service life of the silicate aggregate, and the final reaction degree reaches 40 percent. Thus, when the ratio is determined, the mass of carbon dioxide absorbed can be calculated from the following formula, and the results are shown in Table 5.
The mass of carbon dioxide absorbed by the regenerated gel material layer:
M CO2 ＝(M serpentine powder *48％+M Forsterite powder *63％+M Wollastonite powder *38％)*80％
Mass of carbon dioxide absorbed by the porous carbon absorbing layer:
M CO2 ＝(M serpentine powder *48％+M Forsterite powder *63％+M Wollastonite powder *38％)*80％+(M Serpentine aggregate *48％+M Forsterite aggregate *63％+M Wollastonite aggregate *38％)*40％
Wherein:
M CO2 is the mass of absorbed carbon dioxide;
M serpentine powder The quality of serpentine powder;
M forsterite powder The quality of the forsterite powder;
M wollastonite powder The wollastonite powder is the mass of wollastonite powder;
M serpentine aggregate The quality of serpentine aggregate;
M forsterite aggregate The quality of the forsterite aggregate;
M wollastonite aggregate The quality of wollastonite aggregate;
carbonization experiment
The carbonization experiment step refers to national standard GB/T50082-2009 standard of method for testing long-term performance and durability of ordinary concrete, and a test box used in the carbonization experiment accords with industry standard JGT 247-2009 concrete carbonization test box;
the specific experimental steps are as follows:
1. forming 10cm cubic concrete test pieces according to the proportion, wherein the cubic concrete test pieces are sequentially 4cm of concrete matrix layers; the regenerated gel material layer is arranged on the surface of the concrete matrix layer by 3cm; the porous carbon absorbing layer is arranged on the surface of the regenerated gel material layer for 3cm;
2. curing for 7d in an environment with the temperature of 20+/-2 ℃ and the humidity of more than 95% after removing the die;
3. curing for 7 days, drying at normal temperature, weighing initial mass, and marking as M 0 And then placing the mixture into a carbonization test box for carbonization, wherein the carbonization environment is set as follows: CO 2 Concentration (30.+ -. 2)%, humidity>80％；
4. Carbonizing for 1 year, taking out sample, drying at normal temperature, and weighing mass M 1 The total absorption rate and total absorption amount of carbon dioxide were calculated:
CO 2 total absorption = (M 1 -M 0 )/M 0 *100％，
CO 2 Total absorption = total weight of formulation (regenerated gel material layer + porous carbon absorbing layer) *CO 2 Total absorption rate.
TABLE 5 data for examples 1-5
Comparative example 2 although the total carbon absorption was high, carbon dioxide could penetrate the porous carbon absorption layer into the concrete matrix layer due to the lack of the regenerated gel material layer, resulting in partial carbonization of the matrix layer, greatly reducing the durability of the matrix layer.
The present invention has been described in detail with reference to the above embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (4)
1. A concrete prefabricated wall panel comprising:
a concrete matrix layer;
the regenerated gel material layer is arranged on the surface of the concrete matrix layer;
a carbon absorbing layer; the regenerated gel material layer is arranged on the surface of the regenerated gel material layer;
the preparation raw materials of the regenerated gel material layer comprise silicate powder;
the preparation raw materials of the carbon absorbing layer comprise silicate powder and silicate aggregate;
the components of the silicate powder and the silicate aggregate independently comprise magnesium silicate and/or calcium silicate;
the silicate aggregate comprises at least one of serpentine aggregate, magnesium olive aggregate and wollastonite aggregate;
the silicate stone powder comprises at least one of serpentine powder, forsterite powder and wollastonite powder;
the content of magnesium silicate and/or calcium silicate in the silicate powder is more than or equal to 90wt%;
the regenerated gel material layer comprises the following components in parts by weight:
80-140 parts of silicate powder, 100-160 parts of silicate cement, 60-80 parts of waste residue powder, 60-100 parts of granulated blast furnace slag powder, 0.05-0.2 part of hydroxypropyl methyl cellulose ether, 160-175 parts of waste slurry water, 5-7.5 parts of water reducer, 30-60 parts of glass beads, 5-9.5 parts of polypropylene fibers, 3-4.5 parts of defoamer and 4-5.5 parts of early strength agent;
the carbon absorbing layer comprises the following components in parts by weight:
80-140 parts of silicate powder, 100-160 parts of silicate cement, 60-80 parts of waste residue powder, 60-100 parts of granulated blast furnace slag powder, 0.05-0.2 part of hydroxypropyl methyl cellulose ether, 150-165 parts of waste slurry, 5-7.5 parts of water reducer and 800-1100 parts of silicate aggregate;
the average grain diameter of the waste slag powder is smaller than 70um; the chemical composition of the waste slag powder is SiO 2 30％-45％，CaO10％-20％，Al 2 O 3 30％-35％，MgO 0～4.5％，Fe 2 O 3 0-5.0%, organic matter 0-10%, other oxides, and the total sum of all components is 100%;
the pH value of the waste slurry is more than or equal to 9.0 and less than or equal to 13.0; the average particle size of the silicate powder is 40-70 mu m; the particle size of the silicate aggregate is 5 mm-10 mm single particle size fraction; the thickness of the regenerated gel material layer is 2-4 cm; the thickness of the carbon absorbing layer is 2-4 cm.
2. The method of preparing a concrete prefabricated wall panel according to claim 1, comprising the steps of:
s120, weighing components of the regenerated gel layer according to a proportion, stirring to obtain first slurry, pouring the first slurry on the upper surface of the concrete matrix layer, trowelling, and pouring the thickness to be 2.0-4.0 cm;
s130, weighing the components of the porous carbon absorbing layer according to a proportion, stirring to obtain second slurry, spreading and pouring the second slurry on the surface of the regenerated rubber material layer, spreading in a vibrating manner, and paving the thickness of 2.0-4.0cm to obtain the concrete prefabricated wallboard.
3. The method according to claim 2, wherein the stirring speed in step S120 is 60-120 r/min.
4. Use of the concrete prefabricated wall panel according to any one of claims 1 for absorbing carbon dioxide.
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