CN116425476A - Carbonization synergistic modified solid waste aggregate, admixture, self-compacting concrete and preparation method of self-compacting concrete - Google Patents
Carbonization synergistic modified solid waste aggregate, admixture, self-compacting concrete and preparation method of self-compacting concrete Download PDFInfo
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- CN116425476A CN116425476A CN202310196880.3A CN202310196880A CN116425476A CN 116425476 A CN116425476 A CN 116425476A CN 202310196880 A CN202310196880 A CN 202310196880A CN 116425476 A CN116425476 A CN 116425476A
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- 239000011376 self-consolidating concrete Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000002910 solid waste Substances 0.000 title claims abstract description 13
- 230000002195 synergetic effect Effects 0.000 title claims abstract description 13
- 238000003763 carbonization Methods 0.000 title claims abstract description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000004568 cement Substances 0.000 claims abstract description 28
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 21
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000004575 stone Substances 0.000 claims abstract description 3
- 239000002893 slag Substances 0.000 claims description 38
- 239000002245 particle Substances 0.000 claims description 15
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 14
- 229910000863 Ferronickel Inorganic materials 0.000 claims description 11
- 239000002912 waste gas Substances 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000010908 plant waste Substances 0.000 claims description 5
- 239000002803 fossil fuel Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 241001232253 Xanthisma spinulosum Species 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 229920005646 polycarboxylate Polymers 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000001238 wet grinding Methods 0.000 abstract description 8
- 238000005204 segregation Methods 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 20
- 229910052759 nickel Inorganic materials 0.000 description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- 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
-
- 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
- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a carbonization synergistic modified solid waste aggregate, an admixture and self-compacting concrete and a preparation method thereof, wherein the preparation method comprises the following steps: 1) Placing 40-60 parts of admixture, 100-150 parts of aggregate and 50-70 parts of water into a vertical stirring mill, introducing industrial tail gas at a speed of 10-30L/min, and grinding for 30-40min at a rotating speed of 400-700r/min to obtain a mixed material containing the aggregate and the admixture; 2) Mixing the mixed material with 100 parts of PO42.5 cement, 250-300 parts of crushed stone and 0.4-0.7 part of water reducer for 3-5min to obtain self-compacting concrete. According to the invention, under the action of carbon dioxide, the admixture and the aggregate are subjected to wet grinding modification, the stability of the modified aggregate is qualified, and the modified admixture and the aggregate mixture are prepared into the self-compacting concrete with high strength, slump expansion and excellent anti-segregation performance.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to carbonization synergistic modified solid waste aggregate and admixture, self-compacting concrete and a preparation method thereof.
Background
The self-compacting concrete has high fluidity, uniformity and stability, does not need to vibrate when pouring, and can fill and compact the whole template space by means of self gravity. However, since self-compacting concrete has high fluidity, the components are subject to sedimentation and segregation under the action of gravity and external force. Therefore, the design of the self-compacting concrete with higher segregation resistance has important significance.
Disclosure of Invention
Aiming at the problems, the carbonization synergistic modified solid waste aggregate and admixture with low cost, low resource consumption, environmental protection and simple process, self-compacting concrete and the preparation method thereof are provided.
The beneficial effect of above-mentioned scheme is:
1) According to the method provided by the invention, the electric furnace ferronickel alloy slag is used as a grinding medium, industrial tail gas is introduced in the wet grinding process, and under the action of carbon dioxide, amorphous glass on the surface of the electric furnace ferronickel alloy slag is dissolved and depolymerized, so that the problem of potential stability of the electric furnace ferronickel alloy slag as aggregate is effectively solved; on the other hand, the method does not need to separate grinding media from grinding materials, and the ferronickel alloy slag and slurry of the electric furnace after wet grinding are discharged from the wet grinding machine at the same time, so that the construction time is saved, and the problem that the slurry cannot be screened out due to blockage of the bottom of a wet grinding tank and a discharge opening is solved;
2) According to the invention, under the action of carbon dioxide, the wet grinding of the superfine admixture is promoted, on one hand, the dissolution of metal ions such as calcium ions, magnesium ions and the like in the admixture is promoted, nano-scale carbonate is generated, nano-carbonate particles are adsorbed on the surface of cement, micropores are filled, a more compact structure is formed, and the nano-carbonate can serve as nucleation sites for C-S-H growth in the cement hydration process, so that the strength is improved; on the other hand, the nano carbonate particles are filled among cement particles, so that the distance among the particles is shortened, the mutual contact opportunity among the particles is increased, the restraint effect among the particles is enhanced, the cohesion and friction force among the particles in the slurry are improved, and the viscosity of the slurry is increased. In addition, the nano carbonate has a huge specific surface area to adsorb a large amount of free water, so that the water demand is increased, the free water is reduced, the flow property of the slurry is reduced, the overlap degree among cement particles is increased due to the reduction of the free water, the friction force among the particles is increased, the flow resistance is increased, the viscosity and the static yield stress are increased, the stability of the fresh cement slurry is increased, and the anti-segregation property is further improved. The admixture is used in the self-compacting concrete, so that the problems of resource shortage and environmental pollution can be solved, the consumption of cement and the total cost of the self-compacting concrete are reduced, and the internal structure and segregation resistance of the self-compacting concrete are effectively improved;
3) The admixture particles subjected to wet grinding treatment have the advantages of increasing the specific surface area, fully dissolving ions, greatly improving the reactivity, fully reacting with carbonate ions generated by the reaction of carbon dioxide dissolved in a liquid phase to generate carbonate, and further reacting CO 2 The fixation and the sealing are carried out, so that the recycling of the carbon dioxide in the field of building materials is realized, the reduction of the carbon emission of the whole life cycle of the building materials is facilitated, and the environment-friendly carbon dioxide sealing material has remarkable environmental protection value and application prospect;
4) According to the invention, carbon dioxide is introduced into the admixture of the wet-milled carbonized fly ash, slag powder, blast furnace ferronickel alloy slag and steel slag in the wet-milling process, and the particles in the admixture are fully crushed and dissolved under the action of mechanical force of the wet mill, and other heavy metal (Cr, cu and the like) ions contained in the admixture are dissolved out and react with the carbon dioxide in the liquid-phase milling process to generate insoluble carbonate, so that heavy metal is solidified, and the harm of heavy metal is further eliminated.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention will be further illustrated, but is not limited, by the following examples.
The invention provides a preparation method of carbonization synergistic modified solid waste aggregate, admixture and self-compacting concrete, wherein the aggregate is water-cooling electric furnace ferronickel alloy slag, and the grain size is 0-5mm; wherein, 0-1mm accounts for 20-30 parts; 60-90 parts of 1-3 mm; 3-5mm accounting for 20-30 parts; the Mohs hardness is more than or equal to 6.5; the water absorption rate is 0.80-1.22%; the crush index value is 15-20%. The admixture is one or more of fly ash, slag powder, blast furnace ferronickel alloy slag and steel slag according to any proportion, and the median particle diameter of the admixture is less than or equal to 25 mu m. The industrial tail gas is one or more of waste gas of cement plants, waste gas of blast furnace ironworks, waste gas generated by burning fossil fuel, and waste gas generated by producing electric power and heat energy, wherein the concentration of carbon dioxide is more than or equal to 50 percent, and the concentration of sulfur dioxide is less than or equal to 10 percent. The cement was PO42.5 cement. The coarse aggregate is crushed stone with the grain size of 5-25mm. The water reducer is a polycarboxylate water reducer, the water reducing rate is more than or equal to 25%, and the solid content is 30-40%.
Example 1
A carbonization synergistic modified solid waste aggregate, an admixture and self-compacting concrete, the preparation method thereof comprises the following steps:
1) Placing 100 parts of electric furnace nickel slag aggregate and 40 parts of fly ash into a vertical stirring mill, adding 50 parts of water, introducing waste gas (carbon dioxide concentration is 50%, sulfur dioxide concentration is 10%) of a cement plant at a speed of 10L/min, and grinding for 30min at a rotating speed of 400r/min to obtain a mixed material containing the aggregate and the admixture;
2) Mixing the mixed material with 100 parts of cement, 250 parts of coarse aggregate and 0.4 part of water reducer in a stirrer, and stirring for 3min to obtain self-compacting concrete.
Example 2
A carbonization synergistic modified solid waste aggregate, an admixture and self-compacting concrete, the preparation method thereof comprises the following steps:
1) Placing 120 parts of electric furnace nickel slag aggregate and 50 parts of slag powder into a vertical stirring mill, adding 60 parts of water, introducing blast furnace iron-making plant waste gas (the carbon dioxide concentration is 60%, and the sulfur dioxide concentration is 8%) at a speed of 15L/min, and grinding for 35min at a rotating speed of 500r/min to obtain a mixed material containing the aggregate and the admixture;
2) Mixing the mixed material with 100 parts of cement, 280 parts of coarse aggregate and 0.5 part of water reducer in a stirrer, and stirring for 4min to obtain self-compacting concrete.
Example 3
A carbonization synergistic modified solid waste aggregate, an admixture and self-compacting concrete, the preparation method thereof comprises the following steps:
1) Placing 150 parts of electric furnace nickel slag aggregate and 60 parts of blast furnace ferronickel slag into a vertical stirring mill, adding 70 parts of water, introducing waste gas generated by burning fossil fuel at a speed of 30L/min (carbon dioxide concentration is 70%, sulfur dioxide concentration is 7%), and grinding for 40min at a rotating speed of 700r/min to obtain a mixed material containing the aggregate and the admixture;
2) Mixing the mixed material with 100 parts of cement, 300 parts of coarse aggregate and 0.7 part of water reducer in a stirrer, and stirring for 5min to obtain self-compacting concrete.
Example 4
A carbonization synergistic modified solid waste aggregate, an admixture and self-compacting concrete, the preparation method thereof comprises the following steps:
1) Placing 150 parts of electric furnace nickel slag aggregate and 60 parts of steel slag into a vertical stirring mill, adding 70 parts of water, introducing waste gas (carbon dioxide concentration is 80%, sulfur dioxide concentration is 9%) generated by power and heat energy production at a speed of 25L/min, and grinding for 40min at a rotating speed of 700r/min to obtain a mixed material containing the aggregate and the admixture;
2) Mixing the mixed material with 100 parts of cement, 300 parts of coarse aggregate and 0.7 part of water reducer in a stirrer, and stirring for 5min to obtain self-compacting concrete.
Example 5
A carbonization synergistic modified solid waste aggregate, an admixture and self-compacting concrete, the preparation method thereof comprises the following steps:
1) Placing 150 parts of electric furnace nickel slag aggregate and 60 parts of mixed admixture of fly ash, slag powder, blast furnace nickel-iron alloy slag and steel slag in any proportion into a vertical stirring mill, adding 50 parts of water, introducing cement plant waste gas, blast furnace iron plant waste gas, waste gas generated by burning fossil fuel, and mixed gas (carbon dioxide concentration is 85%, sulfur dioxide concentration is 10%) of waste gas generated by electric power and heat energy production at a rate of 30L/min, and grinding for 40min according to a rotating speed of 700r/min to obtain a mixed material containing the aggregate and the admixture;
2) Mixing the mixed material with 100 parts of cement, 300 parts of coarse aggregate and 0.7 part of water reducer in a stirrer, and stirring for 5min to obtain self-compacting concrete.
Comparative example 1
And (3) placing 100 parts of electric furnace nickel slag aggregate, 40 parts of fly ash, 50 parts of water, 100 parts of cement, 250 parts of coarse aggregate and 0.4 part of water reducer into a stirrer for mixing, and stirring for 3min to obtain self-compacting concrete.
Comparative example 2
And (3) placing 150 parts of electric furnace nickel slag aggregate, 60 parts of slag powder, 70 parts of water, 100 parts of cement, 300 parts of coarse aggregate and 0.7 part of water reducer into a stirrer for mixing, and stirring for 5min to obtain self-compacting concrete.
Comparative example 3
And placing 150 parts of electric furnace nickel slag aggregate, 60 parts of blast furnace nickel iron alloy slag, 70 parts of water, 100 parts of cement, 300 parts of coarse aggregate and 0.7 part of water reducer into a stirrer for mixing, and stirring for 5min to obtain self-compacting concrete.
Comparative example 4
And (3) placing 150 parts of electric furnace nickel slag aggregate, 60 parts of steel slag, 70 parts of water, 100 parts of cement, 300 parts of coarse aggregate and 0.7 part of water reducer into a stirrer for mixing, and stirring for 5min to obtain self-compacting concrete.
Comparative example 5
150 parts of electric furnace nickel slag aggregate, 60 parts of fly ash, slag powder, blast furnace nickel iron alloy slag, steel slag mixed admixture, 70 parts of water, 100 parts of cement, 300 parts of coarse aggregate and 0.7 part of water reducer are placed into a stirrer to be mixed, and the mixture is stirred for 5 minutes to obtain self-compacting concrete.
The performance test of the concrete samples of the examples and comparative examples in the present invention is shown in the following table:
note that: the expansion percentage is more than 0.5, and the stability is unqualified; the carbon dioxide emission of the main material is calculated according to 860 kg/ton mainly by considering the carbon dioxide emission of the cement; comprehensive carbon dioxide emission calculation basis: carbon dioxide emission, grinding energy consumption and carbon dioxide fixed quantity of the material; the grinding equipment calculates according to the conventional capacity of 5t/h and 75kw, and averages 0.785 kg/kw.h according to carbon dioxide; wherein the stability of the ferronickel alloy slag of the electric furnace is tested according to GB/T750-1992 cement steaming stability test method. The segregation rate, slump expansion and compressive strength of self-compacting concrete were tested according to JGJ/T283-2012 technical Specification for self-compacting concrete application.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the teachings of the present invention, which are intended to be included within the scope of the invention.
Claims (8)
1. The preparation method of the carbonized synergistic modified solid waste aggregate, the admixture and the self-compacting concrete is characterized by comprising the following steps:
1) Placing 100-150 parts of aggregate and 40-60 parts of admixture into a vertical stirring mill, adding 50-70 parts of water, introducing industrial tail gas at a speed of 10-30L/min, and grinding for 30-40min at a rotating speed of 400-700r/min to obtain a mixed material containing the aggregate and the admixture;
2) Mixing the mixed material with 100 parts of cement, 250-300 parts of coarse aggregate and 0.4-0.7 part of water reducer in a mixer, and stirring for 3-5min to obtain the self-compacting concrete.
2. The preparation method according to claim 1, wherein the aggregate is water-cooled electric furnace ferronickel slag with a particle size of 0-5mm; wherein, 0-1mm accounts for 20-30 parts; 60-90 parts of 1-3 mm; 3-5mm accounting for 20-30 parts; the Mohs hardness is more than or equal to 6.5; the water absorption rate is 0.80-1.22%; the crush index value is 15-20%.
3. The preparation method of claim 1, wherein the admixture is one or more of fly ash, slag powder, blast furnace ferronickel alloy slag and steel slag according to any proportion, and the median particle size of the admixture is less than or equal to 25 μm.
4. The method of claim 1, wherein the industrial tail gas is one or more of a cement plant waste gas, a blast furnace iron plant waste gas, a waste gas generated by burning fossil fuel, a waste gas generated by electric power and thermal energy production, and wherein the carbon dioxide concentration is not less than 50% and the sulfur dioxide concentration is not more than 10%.
5. The method of claim 1, wherein the cement is PO42.5 cement.
6. The method according to claim 1, wherein the coarse aggregate is crushed stone having a particle size of 5 to 25mm.
7. The preparation method according to claim 1, wherein the water reducer is a polycarboxylate water reducer, the water reducing rate of which is more than or equal to 25%, and the solid content of which is 30-40%.
8. Carbonization synergistic modified solid waste aggregate and admixture and self-compacting concrete, characterized in that it is prepared according to the preparation method of any one of claims 1-7.
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|---|---|---|---|---|
| KR20120066769A (en) * | 2010-12-15 | 2012-06-25 | 김연숙 | Manufacture and composition of high strength concrete using fine aggregate from fe-ni slag |
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| WO2016145548A1 (en) * | 2015-03-16 | 2016-09-22 | 清华大学 | Self-compacting concrete prepared from industrial solid waste and preparation method therefor |
| CN110204232A (en) * | 2019-06-18 | 2019-09-06 | 保利长大工程有限公司 | Ferronickel slag superfine sand concrete and preparation method thereof |
| CN115043620A (en) * | 2022-03-09 | 2022-09-13 | 湖北工业大学 | Method for preparing early-strength precast concrete by taking sand as grinding medium |
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2023
- 2023-03-03 CN CN202310196880.3A patent/CN116425476A/en active Pending
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| 赵少伟等: "湿磨时间对钢渣泥碳化固结特性的影响机理研究", 《金属矿山》, no. 557, 30 November 2022 (2022-11-30), pages 246 - 251 * |
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