CN115583820A - Inorganic artificial stone prepared by curing carbon dioxide and preparation method thereof - Google Patents
Inorganic artificial stone prepared by curing carbon dioxide and preparation method thereof Download PDFInfo
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 176
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 88
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 88
- 239000002969 artificial stone Substances 0.000 title claims abstract description 77
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 238000003763 carbonization Methods 0.000 claims abstract description 75
- 239000002994 raw material Substances 0.000 claims abstract description 62
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000006004 Quartz sand Substances 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 5
- 239000011575 calcium Substances 0.000 claims abstract description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 5
- 238000012423 maintenance Methods 0.000 claims description 37
- 238000002156 mixing Methods 0.000 claims description 32
- 238000011049 filling Methods 0.000 claims description 17
- 239000000839 emulsion Substances 0.000 claims description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000002174 Styrene-butadiene Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000011115 styrene butadiene Substances 0.000 claims description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052799 carbon Inorganic materials 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 239000004566 building material Substances 0.000 abstract description 6
- 238000006386 neutralization reaction Methods 0.000 abstract description 2
- 238000001723 curing Methods 0.000 description 99
- 238000000465 moulding Methods 0.000 description 38
- 239000007789 gas Substances 0.000 description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000000748 compression moulding Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- 235000012241 calcium silicate Nutrition 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000035425 carbon utilization Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- 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
- 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
- C04B40/02—Selection of the hardening environment
- C04B40/0231—Carbon dioxide hardening
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of inorganic artificial stone materials, in particular to an inorganic artificial stone prepared by curing carbon dioxide and a preparation method thereof, wherein the inorganic artificial stone is mainly prepared from the following raw materials in parts by weight: 30-50 parts of carbon-fixing cementing material, 0-10 parts of metakaolin, 0-10 parts of calcium powder and 40-60 parts of quartz sand; the sum of the weight parts of the raw materials is 100 parts; in the curing process of the preparation method, carbon dioxide with the concentration of 25-99% is used as curing atmosphere, so that the strength of the inorganic artificial stone product can be greatly improved, a large amount of carbon dioxide can be absorbed in the carbonization process, carbon emission in the production process of the building material industry is further reduced, the preparation method has important significance for realizing carbon neutralization in the building material industry, has the advantages of low energy consumption and the like, and accords with the sustainable development road of low energy consumption, low carbon and emission reduction in the building material industry at present.
Description
Technical Field
The invention relates to the technical field of inorganic artificial stone materials, in particular to an inorganic artificial stone prepared by curing carbon dioxide and a preparation method thereof.
Background
Inorganic rostone is the novel stone material that develops on traditional rostone's basis, compares in traditional rostone and adopts organic compounds such as resin glue to do the promotion that the bonding agent has a matter, no matter in safety ring protects, still produces the property ability, if it is corrosion-resistant, on resistant time, wear-resisting, high temperature resistant etc. compare traditional rostone and all have obvious improvement and promotion.
At present, the inorganic artificial stone generally mainly uses Portland cement as a main cementing material, and the current maintenance of the inorganic artificial stone is mainly a wet-heat maintenance process, and is carried out in a large-scale maintenance box, wherein the temperature is up to 40-70 ℃, and the maintenance period is 24-48h. In the curing process, the energy consumption is increased, the curing period is longer, and the production cost is indirectly increased.
Chinese patent publication No. CN112851208B discloses a solid waste based inorganic artificial stone and a preparation method thereof, wherein a wet heat curing process is adopted, and the curing temperature and the humidity are matched to be 35-45 ℃ and 65-85%, but the curing time is longer; chinese patent publication No. CN112094084A discloses an inorganic artificial stone and a preparation method thereof, wherein the inorganic artificial stone is obtained by curing for 24-48h in a curing box with the temperature of 40-70 ℃ and the humidity of more than or equal to 95%, and the curing temperature and the humidity are high, and the curing time is long.
Therefore, the process method for curing at normal temperature and shortening the curing period is provided, the strength of the inorganic artificial stone product is improved, and the reduction of carbon emission is one direction which is urgently needed to be broken through in the preparation of the inorganic artificial stone at present.
Disclosure of Invention
The invention aims to provide an inorganic artificial stone prepared by curing carbon dioxide and a preparation method thereof, and aims to solve the technical problems that the curing time of the inorganic artificial stone and the strength of an inorganic artificial stone product cannot be simultaneously considered and the carbon emission in the production process can be reduced in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides an inorganic artificial stone prepared by curing carbon dioxide, which is mainly prepared from the following raw materials in parts by weight: 30-50 parts of carbon-fixing cementing material, 0-10 parts of metakaolin, 0-10 parts of calcium powder and 40-60 parts of quartz sand; the sum of the weight parts of the raw materials is 100 parts;
further, the carbon-fixing cementing material comprises one or more of dicalcium silicate, steel slag and fly ash.
Further, the particle size of the carbon-fixing cementing material is less than 0.075mm.
Further, the raw materials also comprise a water reducing agent, and the weight ratio of the water reducing agent to the carbon fixation cementing material is 1.5-5.
Further, the water reducing agent is polycarboxylic acid.
Further, the raw materials also comprise an emulsion, and the weight ratio of the emulsion to the carbon-fixing cementing material is 0-5.
Further, the emulsion is styrene-butadiene emulsion.
Further, the preparation method of the inorganic artificial stone prepared by curing carbon dioxide comprises the following steps:
s1, weighing raw materials in proportion, and uniformly mixing the raw materials according to the water-to-glue ratio of 0.1-0.3;
s2, pressing and forming under the forming pressure of 3MPa;
and S3, after forming, placing the inorganic artificial stone in a carbonization kettle, and filling carbon dioxide gas for carbonization and maintenance to obtain a finished product.
Further, the carbonization conditions are as follows: the temperature is room temperature; the relative humidity is 20-95%; pressure: 0.1-0.3MPa; the concentration of carbon dioxide is 25-99%; the carbonization and maintenance time is 2-10h.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
(1) According to the inorganic artificial stone prepared by curing carbon dioxide, the carbon-fixing cementing material is used as the cementing material of the inorganic artificial stone, the inorganic artificial stone is pressed and molded, and then the inorganic artificial stone is placed in a carbon dioxide atmosphere at normal temperature for curing the carbon-fixing cementing material to rapidly react with carbon dioxide to generate a large amount of carbonized products to wrap and connect surrounding particles together, and calcium carbonate in the products is used as a main strength contributor to prepare the inorganic artificial stone product with excellent pressure resistance.
(2) The inorganic artificial stone prepared by curing with carbon dioxide and the preparation method thereof can be cured at normal temperature, can reduce energy consumption consumed in the production process, greatly shortens curing time and indirectly reduces production cost.
(3) According to the inorganic artificial stone prepared by curing with carbon dioxide and the preparation method thereof, carbon dioxide with the concentration of 25% -99% is used as curing atmosphere, the strength of the inorganic artificial stone product is greatly improved, and compared with the standard curing condition of 35-70 ℃ of the existing inorganic artificial stone, the inorganic artificial stone has the advantages of low energy consumption and the like, and accords with the sustainable development road of low energy consumption, low carbon and emission reduction in the building material industry at present.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides an inorganic artificial stone prepared by curing carbon dioxide, which is mainly prepared from the following raw materials in parts by weight: 30-50 parts of carbon-fixing cementing material, 0-10 parts of metakaolin, 0-10 parts of calcium powder and 40-60 parts of quartz sand; the sum of the weight parts of the raw materials is 100 parts; the carbon-fixing cementing material comprises dicalcium silicate, steel slag and fly ash. The particle size of the carbon-fixing cementing material is less than 0.075mm. The raw materials also comprise a water reducing agent, and the weight ratio of the water reducing agent to the carbon fixation cementing material is 1.5-5. The water reducing agent is polycarboxylic acid. The raw materials also comprise emulsion, and the weight ratio of the emulsion to the carbon-fixing cementing material is 0-5. The emulsion is styrene-butadiene emulsion.
The invention provides a preparation method of an inorganic artificial stone prepared by curing carbon dioxide, which comprises the following steps:
s1, mixing raw materials: weighing raw materials in proportion, and uniformly mixing the raw materials according to the water-gel ratio of 0.1-0.3;
s2, compression molding: pressing and forming under the forming pressure of 3MPa;
s3, carbonizing and maintaining: and after forming, placing the inorganic artificial stone in a carbonization kettle, and filling carbon dioxide gas for carbonization and curing to obtain a finished product.
The carbonization conditions are as follows: the temperature is room temperature; the relative humidity is 20-95%; pressure: 0.1-0.3MPa; the concentration of carbon dioxide is 25-99%; the carbonization and maintenance time is 2-10h
Example 1: the embodiment provides an inorganic artificial stone prepared by curing carbon dioxide
1.1 mixing of raw materials
Weighing 40 parts of carbon-fixing cementing material, 5 parts of metakaolin, 5 parts of calcium powder, 26.5 parts of 80-120 mesh quartz sand, 9 parts of 60-80 mesh quartz sand and 14.5 parts of 40-60 mesh quartz sand; adding a water reducing agent accounting for 4.3 percent of the weight part of the carbon-fixing cementing material and an emulsion accounting for 4 percent of the weight part of the carbon-fixing cementing material, and uniformly mixing the raw materials according to the water-gel ratio of 0.125.
1.2 Press Forming
Pressing under a forming pressure of 3MPa to form a cylinder with the diameter of 4cm and the height of 2.3 cm.
1.3 carbonization curing
Placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle after molding, and filling carbon dioxide gas for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 95%, the carbon dioxide concentration is 99%, the carbonization pressure is 0.2MPa, and the curing time is 8h.
Example 2: the embodiment provides an inorganic artificial stone prepared by curing carbon dioxide
2.1 mixing of raw materials
The raw material mixing of example 2 was the same as example 1.
2.2 Press Molding of raw Material
The press molding of example 2 was the same as example 1.
2.3 carbonization curing
Placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle after molding, and filling carbon dioxide gas for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 95%, the carbon dioxide concentration is 75%, the carbonization pressure is 0.2MPa, and the curing time is 8h.
Example 3: the embodiment provides an inorganic artificial stone prepared by curing carbon dioxide
3.1 mixing of raw materials
The raw material mixing of example 3 was the same as example 1.
3.2 Press Molding of raw Material
The press molding of example 3 was the same as example 1.
3.3 carbonization curing
After molding, placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle, and filling carbon dioxide gas for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 95%, the carbon dioxide concentration is 50%, the carbonization pressure is 0.2MPa, and the curing time is 8h.
Example 4: the embodiment provides an inorganic artificial stone prepared by curing carbon dioxide
4.1 mixing of raw materials
The raw material mixing of example 4 was the same as example 1.
4.2 Press Molding of raw Material
The press molding of example 4 was the same as example 1.
4.3 carbonization curing
Placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle after molding, and filling carbon dioxide gas for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 95%, the carbon dioxide concentration is 25%, the carbonization pressure is 0.2MPa, and the curing time is 8h.
Example 5: the embodiment provides an inorganic artificial stone prepared by curing carbon dioxide
5.1 mixing of raw materials
The raw material mixing of example 5 was the same as example 1.
5.2 Press Molding of raw Material
The press molding of example 5 was the same as example 1.
5.3 carbonization curing
Placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle after molding, and filling carbon dioxide gas for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 75%, the carbon dioxide concentration is 99%, the carbonization pressure is 0.2MPa, and the curing time is 8h.
Example 6: the embodiment provides an inorganic artificial stone prepared by curing carbon dioxide
6.1 mixing of raw materials
The raw material mixing of example 6 was the same as example 1.
6.2 Press Molding of raw Material
The press molding of example 6 was the same as example 1.
6.3 carbonization curing
Placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle after molding, and filling carbon dioxide gas for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 43%, the carbon dioxide concentration is 99%, the carbonization pressure is 0.2MPa, and the curing time is 8h.
Example 7: the embodiment provides an inorganic artificial stone prepared by curing carbon dioxide
7.1 mixing of raw materials
The raw material mixing of example 7 was the same as in example 1.
7.2 compression Molding of raw Material
The press molding of example 7 was the same as example 1.
7.3 carbonization curing
Placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle after molding, and filling carbon dioxide gas for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 22%, the carbon dioxide concentration is 99%, the carbonization pressure is 0.2MPa, and the curing time is 8h.
Example 8: the embodiment provides an inorganic artificial stone prepared by curing carbon dioxide
8.1 mixing of raw materials
The raw material mixing of example 8 was the same as example 1.
8.2 Press Molding of raw Material
The press molding of example 8 was the same as example 1.
8.3 carbonization curing
After molding, placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle, and filling carbon dioxide gas for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 95%, the carbon dioxide concentration is 99%, the carbonization pressure is 0.2MPa, and the curing time is 10h.
Example 9: the embodiment provides an inorganic artificial stone prepared by curing carbon dioxide
9.1 mixing of raw materials
The raw material mixing of example 9 was the same as example 1.
9.2 Press Molding of raw Material
The press molding of example 9 was the same as example 1.
9.3 carbonization curing
Placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle after molding, and filling carbon dioxide gas for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 95%, the carbon dioxide concentration is 99%, the carbonization pressure is 0.2MPa, and the curing time is 6h.
Example 10: the embodiment provides an inorganic artificial stone prepared by curing carbon dioxide
10.1 mixing of raw materials
The raw material mixing of example 10 was the same as example 1.
10.2 Press Molding of raw Material
The press molding of example 10 was the same as in example 1.
10.3 carbonization curing
Placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle after molding, and filling carbon dioxide gas for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 95%, the carbon dioxide concentration is 99%, the carbonization pressure is 0.2MPa, and the curing time is 4h.
Example 11: the embodiment provides an inorganic artificial stone prepared by curing carbon dioxide
11.1 mixing of raw materials
The raw material mixing of example 11 was the same as example 1.
11.2 Press Molding of raw Material
The press molding of example 11 was the same as example 1.
11.3 carbonization curing
Placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle after molding, and filling carbon dioxide gas for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 95%, the carbon dioxide concentration is 99%, the carbonization pressure is 0.2MPa, and the curing time is 2h.
Example 12: the embodiment provides an inorganic artificial stone prepared by curing carbon dioxide
12.1 mixing of raw materials
The raw material mixing of example 12 was the same as in example 1.
12.2 Press Molding of raw Material
The press molding of example 12 was the same as in example 1.
12.3 carbonization curing
Placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle after molding, and filling carbon dioxide gas for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 95%, the carbon dioxide concentration is 99%, the carbonization pressure is 0.1MPa, and the curing time is 8h.
Example 13: the embodiment provides an inorganic artificial stone prepared by curing carbon dioxide
13.1 mixing of raw materials
The raw material mixing of example 13 was the same as in example 1.
13.2 Press Molding of raw Material
The press molding of example 13 was the same as example 1.
13.3 carbonization curing
Placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle after molding, and filling carbon dioxide gas for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 95%, the carbon dioxide concentration is 99%, the carbonization pressure is 0.3MPa, and the curing time is 8h.
Comparative example 14: the comparative example provides an inorganic artificial stone prepared by curing with nitrogen
14.1 mixing of raw materials
The raw material mixing of example 14 was the same as in example 1.
14.2 compression Molding of raw Material
The press molding of example 14 was the same as example 1.
14.3 carbonization curing
Placing the carbon-fixing inorganic artificial stone cylinder in a carbonization kettle after molding, and filling nitrogen for carbonization and maintenance, wherein the maintenance conditions are as follows: the curing temperature is 25 ℃ (room temperature), the curing humidity is 95%, the nitrogen concentration is 99%, the carbonization pressure is 0.2MPa, and the curing time is 8h.
Performance detection
The flexural strength of each sample is measured and compared by curing the carbon-fixing inorganic artificial stone products prepared in the examples 1-13 and the comparative example 14, and the specific experimental data are shown in the table 1.
TABLE 1 flexural Strength of samples of examples 1-13 and comparative example 14
| DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION | Curing atmosphere | Carbonization pressure | Carbonization time | Humidity | Flexural strength |
| Example 1 | 99% carbon dioxide | 0.2MPa | 8h | 95％ | 17.2MPa |
| Example 2 | 75% carbon dioxide | 0.2MPa | 8h | 95％ | 15.6MPa |
| Example 3 | 50% carbon dioxide | 0.2MPa | 8h | 95％ | 14.5MPa |
| Example 4 | 25% carbon dioxide | 0.2MPa | 8h | 95％ | 13.8MPa |
| Example 5 | 99% carbon dioxide | 0.2MPa | 8h | 75％ | 16.2MPa |
| Example 6 | 99% carbon dioxide | 0.2MPa | 8h | 43％ | 15.8MPa |
| Example 7 | 99% carbon dioxide | 0.2MPa | 8h | 22％ | 13.2MPa |
| Example 8 | 99% carbon dioxide | 0.2MPa | 10h | 95％ | 17.1MPa |
| Example 9 | 99% carbon dioxide | 0.2MPa | 6h | 95％ | 15.9MPa |
| Example 10 | 99% carbon dioxide | 0.2MPa | 4h | 95％ | 14.7MPa |
| Example 11 | 99% carbon dioxide | 0.2MPa | 2h | 95％ | 12.6MPa |
| Example 12 | 99% carbon dioxide | 0.1MPa | 8h | 22％ | 15.4MPa |
| Example 13 | 99% carbon dioxide | 0.3MPa | 8h | 22％ | 16.1MPa |
| Comparative example 14 | 99% nitrogen gas | 0.2MPa | 8h | 95％ | 0.3MPa |
As can be seen from Table 1, by comparing example 1 with comparative example 14, it is found that oxidation in a carbon dioxide atmosphere is a necessary condition for preparing an inorganic artificial stone from a carbon-fixed cement. As can be seen from comparison of other examples, the concentration of carbon dioxide, the carbonization pressure, the carbonization time and the humidity are the influencing factors of the flexural strength of the inorganic artificial stone, wherein under the condition that the concentration of the carbon dioxide is 99 percent, the carbonization pressure is 0.2MPa, the carbonization time is 8h and the humidity is 95 percent, the flexural strength of the inorganic artificial stone is the highest and reaches 17.2MPa.
The method for preparing the inorganic artificial stone by curing with carbon dioxide not only achieves the advantages of low energy consumption, cost reduction and the like, but also provides a sustainable development road for carbon utilization in the production and manufacturing process of the building material industry, and has important significance for realizing carbon neutralization in the building material industry.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. The inorganic artificial stone prepared by curing carbon dioxide is characterized by mainly being prepared from the following raw materials in parts by weight: 30-50 parts of carbon-fixing cementing material, 0-10 parts of metakaolin, 0-10 parts of calcium powder and 40-60 parts of quartz sand; the sum of the weight parts of the raw materials is 100 parts.
2. The inorganic artificial stone prepared by curing with carbon dioxide as claimed in claim 1, wherein the carbon-fixing cementing material comprises 65 parts of γ -C 2 S, 15 parts of steel slag and 20 parts of fly ash.
3. The inorganic artificial stone prepared by curing with carbon dioxide according to claim 1, wherein the particle size of the carbon-fixing cementing material is less than 0.075mm.
4. The inorganic artificial stone prepared by curing with carbon dioxide according to claim 1, wherein the raw materials further comprise a water reducing agent, and the weight ratio of the water reducing agent to the carbon-fixing cementing material is 1.5-5.
5. The inorganic artificial stone cured and prepared by carbon dioxide as claimed in claim 4, wherein the water reducing agent is polycarboxylic acid.
6. The inorganic artificial stone prepared by curing with carbon dioxide according to claim 1, wherein the raw materials further comprise an emulsion, and the weight ratio of the emulsion to the carbon-fixing cementing material is 0-5.
7. The inorganic artificial stone prepared by curing with carbon dioxide according to claim 6, wherein the emulsion is styrene-butadiene emulsion.
8. The method for manufacturing an inorganic artificial stone manufactured by curing with carbon dioxide according to any one of claims 1 to 7, comprising the steps of:
s1, weighing raw materials in proportion, and uniformly mixing the raw materials according to the water-to-glue ratio of 0.1-0.3;
s2, pressing and forming under the forming pressure of 3MPa;
and S3, after forming, placing the inorganic artificial stone in a carbonization kettle, and filling carbon dioxide gas for carbonization and maintenance to obtain a finished product.
9. The method for preparing an inorganic artificial stone by curing with carbon dioxide according to claim 8, wherein the carbonization conditions are as follows: the temperature is room temperature; the relative humidity is 20-95%; pressure: 0.1-0.3MPa; the concentration of carbon dioxide is 25-99%; the carbonization and maintenance time is 2-10h.
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