CN115108766A - Artificial stone manufactured by using construction waste and fly ash of power plant and process - Google Patents
Artificial stone manufactured by using construction waste and fly ash of power plant and process Download PDFInfo
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- CN115108766A CN115108766A CN202210823498.6A CN202210823498A CN115108766A CN 115108766 A CN115108766 A CN 115108766A CN 202210823498 A CN202210823498 A CN 202210823498A CN 115108766 A CN115108766 A CN 115108766A
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- power plant
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- 238000010276 construction Methods 0.000 title claims abstract description 65
- 239000002699 waste material Substances 0.000 title claims abstract description 65
- 239000010881 fly ash Substances 0.000 title claims abstract description 64
- 239000002969 artificial stone Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000003756 stirring Methods 0.000 claims abstract description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000004568 cement Substances 0.000 claims abstract description 33
- 239000002002 slurry Substances 0.000 claims abstract description 33
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 28
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 14
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 14
- 239000012190 activator Substances 0.000 claims abstract description 7
- 239000003513 alkali Substances 0.000 claims abstract description 7
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 7
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 7
- 239000010813 municipal solid waste Substances 0.000 claims description 30
- 239000011812 mixed powder Substances 0.000 claims description 24
- 238000000498 ball milling Methods 0.000 claims description 22
- 239000000243 solution Substances 0.000 claims description 22
- 239000012535 impurity Substances 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 238000005188 flotation Methods 0.000 claims description 12
- 238000007885 magnetic separation Methods 0.000 claims description 12
- 238000007670 refining Methods 0.000 claims description 12
- 229910021389 graphene Inorganic materials 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
- 238000009210 therapy by ultrasound Methods 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 6
- 238000001291 vacuum drying Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims 1
- 238000002604 ultrasonography Methods 0.000 description 10
- 238000000527 sonication Methods 0.000 description 6
- 238000006703 hydration reaction Methods 0.000 description 5
- 239000011083 cement mortar Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920001730 Moisture cure polyurethane Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 229910001579 aluminosilicate mineral Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000009870 specific binding Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/022—Carbon
- C04B14/024—Graphite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
- C04B22/062—Oxides, Hydroxides of the alkali or alkaline-earth metals
-
- 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
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- 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
- C04B2111/2038—Resistance against physical degradation
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a process for manufacturing artificial stone by utilizing construction waste and fly ash of a power plant. The artificial stone manufactured by utilizing the construction waste and the fly ash of the power plant comprises the following raw materials in parts by weight: 70-85 parts of construction waste slurry, 10-15 parts of modified water reducing agent, 5-6 parts of modified cement, 2-4 parts of fly ash of a power plant, 5-10 parts of titanium dioxide and 4-8 parts of auxiliary agent; the modified water reducing agent is prepared by the following steps: step S1: uniformly stirring the sodium hydroxide solution and water glass to prepare an alkali activator solution; step S2: then ultrasonically dispersing the nano silicon dioxide for 10-15min, and uniformly stirring; step S3: adding the dispersed nano silicon dioxide into the water reducing agent. The artificial stone is prepared from the construction waste and the fly ash, does not require special natural resources, does not consume natural raw materials, has low material cost, is not easy to shrink, is wear-resistant and has strong mechanical property.
Description
Technical Field
The invention belongs to the technical field of artificial stones, and particularly relates to an artificial stone and a process for manufacturing the artificial stone by using construction waste and fly ash of a power plant.
Background
With the acceleration of industrialization and urbanization processes, the amount of construction waste generated in city removal and city construction is increasing. The urban building garbage mainly comprises concrete blocks, broken stones, broken bricks and tiles, waste mortar, building glass, broken building ceramic and the like except a small amount of steel bars. A large amount of construction waste is generated when houses in each area are removed or rebuilt, and the solid waste forms a huge accumulation amount, so that the problems of occupation and damage of a large amount of land, reduction of air quality and the like are caused. Therefore, the efficient utilization of urban construction waste is urgent.
The artificial stone product is a novel green building decoration material prepared from a mixture of crushed stone powder of natural stone tailings and a specific binding substance, and has wide application and popularization prospects as the production process meets the standards of energy conservation, emission reduction and low carbon, and a large amount of industrial tailings and garbage can be digested. Because the artificial stone product has the advantages of no toxicity, no radioactivity, flame retardance, no oil adhesion, no dirt seepage, antibiosis, mildew resistance, wear resistance, impact resistance, easy maintenance, seamless splicing, arbitrary shape and the like, the artificial stone product is gradually becoming a new favorite in the market of decoration and building materials.
But the shrinkage of the prior artificial stone product is higher, but the mechanical property is poorer, and the popularization and the application of the artificial stone product are seriously restricted.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an artificial stone manufactured by using construction waste and fly ash of a power plant and a process thereof, so as to solve the problems that the mechanical property of the artificial stone is poor and the popularization and application of the artificial stone product are severely restricted in the prior art.
One embodiment of the invention provides a method for manufacturing artificial stone by using construction waste and fly ash of a power plant. The artificial stone manufactured by utilizing the construction waste and the fly ash of the power plant comprises the following raw material components in parts by weight:
70-85 parts of construction waste slurry, 10-15 parts of modified water reducing agent, 5-6 parts of modified cement, 2-4 parts of power plant fly ash, 5-10 parts of titanium dioxide and 4-8 parts of auxiliary agent;
the modified water reducing agent is prepared by the following steps:
step S1: uniformly stirring the sodium hydroxide solution and water glass to prepare an alkali activator solution;
step S2: then ultrasonically dispersing the nano silicon dioxide for 10-15min, and uniformly stirring;
step S3: adding the dispersed nano silicon dioxide into the water reducing agent, and stirring for 1-2min by a stirring rod to form a uniform mixed solution.
In one embodiment, the modified cement is prepared by the following steps:
step A1: adding the fly ash into a reaction kettle, mixing and stirring for 30-50s, and uniformly dispersing;
step A2: adding graphene oxide into deionized water, stirring and dissolving, and then stirring and dissolving a polycarboxylic acid water reducing agent;
step A3: carrying out ultrasonic treatment on the dissolved solution for 15-20min to obtain modified fly ash;
step A4: and adding the modified fly ash into the cement slurry, and fully stirring to obtain the modified cement.
In one embodiment, the adding mass of the fly ash and the graphene oxide in the step A1 is 65-70: 16-25; the mass ratio of the dehydrated epoxy resin obtained in the step S2 to the polyurethane prepolymer obtained in the step S1 is 20-50:70-90
In one embodiment, the construction waste slurry is prepared by the following steps:
the method comprises the following steps: crushing, namely crushing the construction waste, and manually sorting to remove large-size impurities;
step two: magnetic separation, namely performing magnetic separation treatment on the crushed building garbage to remove metal impurities in the crushed building garbage;
step three: refining, namely refining the magnetically-separated construction waste crushed aggregates again;
step four: and (4) performing flotation, namely performing water washing flotation on the refined building garbage to remove light impurities and soil in the refined building garbage to obtain the building garbage slurry.
In one embodiment, the ultrasound is performed in a batch mode, and the ultrasound is paused for 3-6 seconds after 3-5 seconds of each ultrasound.
In one embodiment, the intermittent sonication process time is 15-20 min.
One embodiment of the invention also provides a process for manufacturing the artificial stone by using the construction waste and the fly ash of the power plant, which comprises the following steps:
step B1: uniformly mixing the construction waste slurry, the modified water reducing agent, the modified cement and the fly ash of the power plant to form a mixed raw material;
step B2: putting the mixed raw materials into a ball mill, and carrying out ball milling;
step B3: grinding the ball-milled mixed powder for 10-20min, and then transferring the powder into a vacuum drying oven to dry for 3h at 100 ℃ to obtain dried mixed powder;
step B4: adding a binder into the dried mixed powder, putting the mixed powder into a die frame or a die, and then performing vibration molding in a vacuum state to form a raw blank;
step B5: heating and solidifying the green blank material to form a solidified blank material, cooling at normal temperature, and cooling to normal temperature;
step B6: and polishing the surface of the blank material to obtain the artificial stone.
In one embodiment, in the step B3, the ball-milling ball-material ratio is 10:1, the ball-milling rotation speed is 800-.
The process for manufacturing the artificial stone by utilizing the construction waste and the fly ash of the power plant and the embodiment have the following beneficial effects:
1. the invention uses the construction waste and the fly ash to prepare the artificial stone, does not require special natural resources, does not consume natural raw materials, has low material cost, is not easy to shrink, is wear-resistant and has strong mechanical property.
2. After the fly ash is dissolved, a large amount of Al3+ can be generated, when the fly ash is doped into cement, the fly ash is dissolved during hydration reaction, a large amount of Al3+ is released in a cement slurry solution, Al3+ can preferentially react with Ca2+ to generate a hydration product, and meanwhile, the graphene oxide can promote the formation of the hydration product, so that the hydration product is regularly and orderly distributed, the holes of cement slurry are filled, a compact structure is formed, the porosity of the slurry is reduced, and the mechanical property of the artificial stone is improved.
3. The aluminosilicate mineral powder raw material in the fly ash is dissolved in a sodium hydroxide solution, the dissolved aluminum-silicon complex is diffused from the surface of cement particles to particle gaps, the calcium ion concentration in cement mortar is low in the early stage of hydration reaction with the modified cement, the fly ash fills the cement mortar, and the modified cement mortar is lubricated.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Example 1
The artificial stone manufactured by utilizing the construction waste and the fly ash of the power plant comprises the following raw materials in parts by weight:
70 parts of construction waste slurry, 10 parts of modified water reducing agent, 5 parts of modified cement, 2 parts of power plant fly ash, 5 parts of titanium dioxide and 4 parts of auxiliary agent;
the modified water reducing agent is prepared by the following steps:
step S1: uniformly stirring the sodium hydroxide solution and water glass to prepare an alkali activator solution;
step S2: then ultrasonically dispersing the nano silicon dioxide for 10min, and uniformly stirring;
step S3: adding the dispersed nano silicon dioxide into the water reducing agent, and stirring for 1min by a stirring rod to form a uniform mixed solution.
In one embodiment, the modified cement is prepared by the following steps:
step A1: adding the fly ash into a reaction kettle, mixing and stirring for 30s, and uniformly dispersing;
step A2: adding graphene oxide into deionized water, stirring and dissolving, and then stirring and dissolving a polycarboxylic acid water reducing agent;
step A3: carrying out ultrasonic treatment on the dissolved solution for 15-min to obtain modified fly ash;
step A4: and adding the modified fly ash into the cement slurry, and fully stirring to obtain the modified cement.
In one embodiment, the mass of the added fly ash and graphene oxide in step a1 is 65: 16.
In one embodiment, the construction waste slurry is prepared by the following steps:
the method comprises the following steps: crushing, namely crushing the construction waste, and manually sorting to remove large-size impurities;
step two: magnetic separation, namely performing magnetic separation treatment on the crushed building garbage to remove metal impurities in the crushed building garbage;
step three: refining, namely refining the magnetically-separated construction waste crushed aggregates again;
step four: and (4) performing flotation, namely performing water washing flotation on the refined building garbage to remove light impurities and soil in the refined building garbage to obtain the building garbage slurry.
In one embodiment, the ultrasound is performed in a batch mode with 3 seconds of pause after each ultrasound.
In one embodiment, the intermittent sonication process time is 15 min.
One embodiment of the invention also provides a process for manufacturing the artificial stone by using the construction waste and the fly ash of the power plant, which comprises the following steps:
step B1: uniformly mixing the construction waste slurry, the modified water reducing agent, the modified cement and the fly ash of the power plant to form a mixed raw material;
step B2: putting the mixed raw materials into a ball mill, and carrying out ball milling;
step B3: grinding the ball-milled mixed powder for 10min, and then transferring the powder into a vacuum drying oven to dry for 3h at 100 ℃ to obtain dried mixed powder;
step B4: adding a binder into the dried mixed powder, putting the mixed powder into a die frame or a die, and then performing vibration molding in a vacuum state to form a raw blank;
step B5: heating and solidifying the green blank material to form a solidified blank material, cooling at normal temperature, and cooling to normal temperature;
step B6: and polishing the surface of the blank material to obtain the artificial stone.
In one embodiment, in the step B3, the ball milling has a ball-to-material ratio of 10:1, a ball milling rotation speed of 800r/min, and a ball milling time of 5 h.
Example 2
The artificial stone manufactured by utilizing the construction waste and the fly ash of the power plant comprises the following raw materials in parts by weight:
80 parts of construction waste slurry, 13 parts of modified water reducing agent, 5.5 parts of modified cement, 3 parts of fly ash of a power plant, 8 parts of titanium dioxide and 6 parts of auxiliary agent;
the modified water reducing agent is prepared by the following steps:
step S1: uniformly stirring the sodium hydroxide solution and water glass to prepare an alkali activator solution;
step S2: then ultrasonically dispersing the nano silicon dioxide for 13min, and uniformly stirring;
step S3: adding the dispersed nano silicon dioxide into the water reducing agent, and stirring by a stirring rod for 1.5min to form a uniform mixed solution.
In one embodiment, the modified cement is prepared by the following steps:
step A1: adding the fly ash into a reaction kettle, mixing and stirring for 40s, and uniformly dispersing;
step A2: adding graphene oxide into deionized water, stirring and dissolving, and then stirring and dissolving a polycarboxylic acid water reducing agent;
step A3: carrying out ultrasonic treatment on the dissolved solution for 17min to obtain modified coal ash;
step A4: and adding the modified fly ash into the cement slurry, and fully stirring to obtain the modified cement.
In one embodiment, the mass of the added fly ash and graphene oxide in step a1 is 68: 20.
In one embodiment, the construction waste slurry is prepared by the following steps:
the method comprises the following steps: crushing, namely crushing the construction waste, and manually sorting to remove large-size impurities;
step two: magnetic separation, namely performing magnetic separation treatment on the crushed building garbage to remove metal impurities in the crushed building garbage;
step three: refining, namely refining the magnetically-separated construction waste crushed aggregates again;
step four: and (4) performing flotation, namely performing water washing flotation on the refined building garbage to remove light impurities and soil in the refined building garbage to obtain the building garbage slurry.
In one embodiment, the ultrasound is performed in a batch mode with a 4.5 second pause after each 4 seconds of ultrasound.
In one embodiment, the intermittent sonication process time is 17 min.
One embodiment of the invention also provides a process for manufacturing the artificial stone by using the construction waste and the fly ash of the power plant, which comprises the following steps:
step B1: uniformly mixing the construction waste slurry, the modified water reducing agent, the modified cement and the fly ash of the power plant to form a mixed raw material;
step B2: putting the mixed raw materials into a ball mill, and performing ball milling;
step B3: grinding the ball-milled mixed powder for 15min, and then transferring the powder into a vacuum drying oven to dry for 3h at 100 ℃ to obtain dried mixed powder;
step B4: adding a binder into the dried mixed powder, putting the mixed powder into a die frame or a die, and then performing vibration molding in a vacuum state to form a raw blank;
step B5: heating and solidifying the green blank material to form a solidified blank material, cooling at normal temperature, and cooling to normal temperature;
step B6: and polishing the surface of the blank material to obtain the artificial stone.
In one embodiment, in the step B3, the ball-milling ball-material ratio is 10:1, the ball-milling rotating speed is 850r/min, and the ball-milling time is 8 h.
Example 3
The artificial stone manufactured by utilizing the construction waste and the fly ash of the power plant comprises the following raw materials in parts by weight:
85 parts of construction waste slurry, 15 parts of modified water reducing agent, 6 parts of modified cement, 4 parts of fly ash of a power plant, 10 parts of titanium dioxide and 8 parts of auxiliary agent;
the modified water reducing agent is prepared by the following steps:
step S1: uniformly stirring the sodium hydroxide solution and water glass to prepare an alkali activator solution;
step S2: then ultrasonically dispersing the nano silicon dioxide for 15min, and uniformly stirring;
step S3: adding the dispersed nano silicon dioxide into the water reducing agent, and stirring for 2min by a stirring rod to form a uniform mixed solution.
In one embodiment, the modified cement is prepared by the following steps:
step A1: adding the fly ash into a reaction kettle, mixing and stirring for 50s, and uniformly dispersing;
step A2: adding graphene oxide into deionized water, stirring and dissolving, and then stirring and dissolving a polycarboxylic acid water reducing agent;
step A3: carrying out ultrasonic treatment on the dissolved solution for 20min to obtain modified fly ash;
step A4: and adding the modified fly ash into the cement slurry, and fully stirring to obtain the modified cement.
In one embodiment, the mass ratio of the added fly ash and the added graphene oxide in the step A1 is 70: 25.
In one embodiment, the construction waste slurry is prepared by the following steps:
the method comprises the following steps: crushing, namely crushing the construction waste, and manually sorting to remove large-size impurities;
step two: magnetic separation, namely performing magnetic separation treatment on the crushed building garbage to remove metal impurities in the crushed building garbage;
step three: refining, namely refining the magnetically-separated construction waste crushed aggregates again;
step four: and (4) flotation, namely performing water washing flotation on the refined construction waste to remove light impurities and soil in the construction waste to obtain construction waste slurry.
In one embodiment, the ultrasound is performed in a batch mode, with a pause of 6 seconds after each sonication for 5 seconds.
In one embodiment, the intermittent sonication process time is 20 min.
One embodiment of the invention also provides a process for manufacturing the artificial stone by using the construction waste and the fly ash of the power plant, which comprises the following steps:
step B1: uniformly mixing the construction waste slurry, the modified water reducing agent, the modified cement and the fly ash of the power plant to form a mixed raw material;
step B2: putting the mixed raw materials into a ball mill, and carrying out ball milling;
step B3: grinding the ball-milled mixed powder for 20min, and then transferring the powder into a vacuum drying oven to dry for 3h at 100 ℃ to obtain dried mixed powder;
step B4: adding a binder into the dried mixed powder, putting the mixed powder into a die frame or a die, and then performing vibration molding in a vacuum state to form a raw blank;
step B5: heating and solidifying the green blank material to form a solidified blank material, cooling at normal temperature, and cooling to normal temperature;
step B6: and polishing the surface of the blank material to obtain the artificial stone.
In one embodiment, in step B3, the ball milling has a ball-to-material ratio of 10:1, a ball milling rotation speed of 900r/min, and a ball milling time of 10 h.
Comparative example 1
The artificial stone manufactured by utilizing the construction waste and the fly ash of the power plant comprises the following raw materials in parts by weight:
80 parts of construction waste slurry, 13 parts of modified water reducing agent, 5.5 parts of cement, 3 parts of fly ash of a power plant, 8 parts of titanium dioxide and 6 parts of auxiliary agent;
the modified water reducing agent is prepared by the following steps:
step S1: uniformly stirring the sodium hydroxide solution and water glass to prepare an alkali activator solution;
step S2: then ultrasonically dispersing the nano silicon dioxide for 13min, and uniformly stirring;
step S3: adding the dispersed nano silicon dioxide into the water reducing agent, and stirring by a stirring rod for 1.5min to form a uniform mixed solution.
In one embodiment, the construction waste slurry is prepared by the following steps:
the method comprises the following steps: crushing, namely crushing the construction waste, and manually sorting to remove large-size impurities;
step two: magnetic separation, namely performing magnetic separation treatment on the crushed building garbage to remove metal impurities in the crushed building garbage;
step three: refining, namely refining the magnetically-separated construction waste crushed aggregates again;
step four: and (4) performing flotation, namely performing water washing flotation on the refined building garbage to remove light impurities and soil in the refined building garbage to obtain the building garbage slurry.
In one embodiment, the ultrasound is performed in a batch mode with a 4.5 second pause after each 4 seconds of ultrasound.
In one embodiment, the intermittent sonication process time is 17 min.
One embodiment of the invention also provides a process for manufacturing the artificial stone by using the construction waste and the fly ash of the power plant, which comprises the following steps:
step B1: uniformly mixing the construction waste slurry, the modified water reducing agent, the cement and the fly ash of the power plant to form a mixed raw material;
step B2: putting the mixed raw materials into a ball mill, and performing ball milling;
step B3: grinding the ball-milled mixed powder for 15min, and then transferring the powder into a vacuum drying oven to dry for 3h at 100 ℃ to obtain dried mixed powder;
step B4: adding a binder into the dried mixed powder, putting the mixed powder into a die frame or a die, and then performing vibration molding in a vacuum state to form a raw blank;
step B5: heating and solidifying the green blank material to form a solidified blank material, cooling at normal temperature, and cooling to normal temperature;
step B6: and polishing the surface of the blank material to obtain the artificial stone.
In one embodiment, in the step B3, the ball-milling has a ball-material ratio of 10:1, a ball-milling rotation speed of 850r/min, and a ball-milling time of 8 h.
The artificial stones obtained in examples 1 to 3 and comparative example 1 were subjected to hardness and abrasion resistance tests, and the test results are shown below.
TABLE 1
| Example 1 | Example 2 | Example 3 | Comparative example 1 | |
| Hardness (Mohs) | 6.4 | 6.6 | 6.5 | 6 |
| Wear resistance (1/m) 3 ) | 78 | 80 | 75 | 45 |
As can be seen from the above Table 1, the artificial stone provided by the invention has strong mechanical properties.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. The utility model provides an utilize building rubbish and flying dust of power plant to make rostone which characterized in that: the feed comprises the following raw materials in parts by weight:
70-85 parts of construction waste slurry, 10-15 parts of modified water reducing agent, 5-6 parts of modified cement, 2-4 parts of power plant fly ash, 5-10 parts of titanium dioxide and 4-8 parts of auxiliary agent;
the modified water reducing agent is prepared by the following steps:
step S1: uniformly stirring the sodium hydroxide solution and water glass to prepare an alkali activator solution;
step S2: then ultrasonically dispersing the nano silicon dioxide for 10-15min, and uniformly stirring;
step S3: adding the dispersed nano silicon dioxide into the water reducing agent, and stirring by a stirring rod for 1-2min to form a uniform mixed solution.
2. The method for manufacturing artificial stone by using construction waste and fly ash of power plant as claimed in claim 1, wherein the method comprises the following steps: the modified cement is prepared by the following steps:
step A1: adding the fly ash into a reaction kettle, mixing and stirring for 30-50s, and uniformly dispersing;
step A2: adding graphene oxide into deionized water, stirring and dissolving, and then stirring and dissolving a polycarboxylic acid water reducing agent;
step A3: carrying out ultrasonic treatment on the dissolved solution for 15-20min to obtain modified fly ash;
step A4: and adding the modified fly ash into the cement slurry, and fully stirring to obtain the modified cement.
3. The method for manufacturing artificial stone by using construction waste and fly ash of power plant as claimed in claim 1, wherein the method comprises the following steps: in the step A1, the adding mass of the fly ash and the graphene oxide is 65-70: 16-25.
4. The method for manufacturing artificial stone by using construction waste and fly ash of power plant as claimed in claim 1, wherein the method comprises the following steps: the construction waste slurry is prepared by the following steps:
the method comprises the following steps: crushing, namely crushing the construction waste, and manually sorting to remove large-size impurities;
step two: magnetic separation, namely performing magnetic separation treatment on the crushed building garbage to remove metal impurities in the crushed building garbage;
step three: refining, namely refining the magnetically-separated construction waste crushed aggregates again;
step four: and (4) performing flotation, namely performing water washing flotation on the refined building garbage to remove light impurities and soil in the refined building garbage to obtain the building garbage slurry.
5. The method for manufacturing artificial stone by using construction waste and fly ash of power plant as claimed in claim 1, wherein the method comprises the following steps: and during the ultrasonic treatment, intermittent ultrasonic treatment is carried out, and the ultrasonic treatment is suspended for 3 to 6 seconds after 3 to 5 seconds of each ultrasonic treatment.
6. The method for manufacturing artificial stone by using construction waste and fly ash of power plants as claimed in claim 5, wherein the method comprises the following steps: the intermittent ultrasonic process time is 15-20 min.
7. A process for manufacturing artificial stones by utilizing construction wastes and fly ashes of power plants is characterized in that:
the method comprises the following steps:
step B1: uniformly mixing the construction waste slurry, the modified water reducing agent, the modified cement and the fly ash of the power plant to form a mixed raw material;
step B2: putting the mixed raw materials into a ball mill, and carrying out ball milling;
step B3: grinding the ball-milled mixed powder for 10-20min, and then transferring the powder into a vacuum drying oven to dry for 3h at 100 ℃ to obtain dried mixed powder;
step B4: adding a binder into the dried mixed powder, putting the mixed powder into a die frame or a die, and then performing vibration molding in a vacuum state to form a raw blank;
step B5: heating and solidifying the green blank material to form a solidified blank material, cooling at normal temperature, and cooling to normal temperature;
step B6: and polishing the surface of the blank material to obtain the artificial stone.
8. The process for manufacturing artificial stone by using construction waste and fly ash of electric power plant as claimed in claim 7, wherein the process comprises the following steps: in the step B3, the ball-milling ball-material ratio is 10:1, the ball-milling rotation speed is 800-.
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| CN115572128A (en) * | 2022-10-13 | 2023-01-06 | 安徽海螺材料科技股份有限公司 | Concrete containing waste incineration fly ash and preparation method thereof |
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