CN112851208B - Solid waste based inorganic artificial stone and preparation method thereof - Google Patents

Solid waste based inorganic artificial stone and preparation method thereof Download PDF

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Publication number
CN112851208B
CN112851208B CN202110040901.3A CN202110040901A CN112851208B CN 112851208 B CN112851208 B CN 112851208B CN 202110040901 A CN202110040901 A CN 202110040901A CN 112851208 B CN112851208 B CN 112851208B
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solid waste
artificial stone
water
superfine powder
inorganic artificial
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CN112851208A (en
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廖洪强
刘强
段思宇
程芳琴
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Shanxi University
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Shanxi University
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
    • B28B11/247—Controlling the humidity during curing, setting or hardening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • 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
    • C04B30/00—Compositions for artificial stone, not containing binders
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017—Aspects relating to the protection of the environment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Processing Of Solid Wastes (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention belongs to the technical field of building materials, and particularly relates to a solid waste base inorganic artificial stone and a preparation method thereof. The invention provides a solid waste based inorganic artificial stone, which comprises the following raw materials of solid waste superfine powder and water; the solid waste superfine powder comprises, by mass, 30-45% of calcium oxide, 20-30% of active silicon oxide, 10-15% of active aluminum oxide, 10-20% of iron oxide and 3-5% of sulfur trioxide; the mass ratio of the solid waste superfine powder to water is 100: 15-18. In the invention, the active alumina and the active silica in the solid waste superfine powder react with calcium oxide to generate calcium silicate and calcium aluminate gelled substances, so that the gelling effect is realized. The solid waste ultrafine powder is used as a main raw material, no additional raw materials such as quartz sand, an organic assistant or an excitant are required to be added, the doping amount of solid waste in the solid waste based inorganic artificial stone is over 95 percent, and an effective way is provided for the resource utilization of the solid waste.

Description

Solid waste based inorganic artificial stone and preparation method thereof
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a solid waste base inorganic artificial stone and a preparation method thereof.
Background
The artificial stone plate comprises an organic artificial stone plate or an inorganic artificial stone plate. The organic artificial stone plate usually adopts urea-formaldehyde resin, phenolic resin or melamine formaldehyde resin as an adhesive, and the product can continuously release micromolecular toxic substances such as formaldehyde, phenol and the like in the production, curing and using processes, thereby polluting the environment and being harmful to the health of human bodies; meanwhile, the organic artificial stone plate is easy to soften and expand after being heated, easy to burn, and poor in heat resistance and weather resistance. The inorganic artificial stone has simple production process, less investment, easy processing and short production period, and the product has higher heat resistance, weather resistance and strength. Therefore, the inorganic artificial stone plate is more and more popular and popular among people.
With the development of economy and the progress of society, the environment becomes the focus of attention of people, how to change waste into valuables and change waste into resources becomes the urgent necessity for sustainable development of human beings. The method for preparing the inorganic artificial stone plate by using the industrial solid wastes to replace natural stone raw materials provides an effective way for the resource utilization of the solid wastes. Therefore, the technicians begin to research and develop the solid waste based inorganic artificial stone plate, for example, chinese patent publication No. CN 111662046a discloses a solid waste based inorganic artificial stone plate and a preparation method thereof, the patent takes solid waste (solid waste based material is at least one of blast furnace slag, fly ash, red mud, coal gangue and steel slag) as raw material and simultaneously adds quartz sand, excitant and water reducer; chinese patent publication No. CN 111217553a discloses a coal gangue/PVC resin artificial stone slab and a preparation method thereof, in which coal gangue is used as a raw material, PVC resin and PE wax organic matter are added, and lubricant and various modifiers are added; for another example, chinese patent publication No. CN 108840617 a discloses a nano inorganic stone slab using fly ash and a method for producing the same, in which stone waste is used as a raw material and quartz sand is added as an aggregate.
The existing solid waste-based inorganic artificial stone plate is added with solid waste in the preparation process, but quartz sand, organic auxiliary agents or exciting agents and other raw materials still need to be additionally added, the doping amount of the solid waste in the solid waste-based inorganic artificial stone plate is low, and the industrial solid waste cannot be fully utilized to recycle the waste.
Disclosure of Invention
In view of the above, the invention provides a solid waste based inorganic artificial stone, which takes solid waste ultrafine powder as a raw material, does not need to additionally add quartz sand, organic auxiliaries or excitants and other raw materials, and better realizes waste recycling.
The invention provides a solid waste based inorganic artificial stone, which comprises the following raw materials of solid waste superfine powder and water;
the solid waste superfine powder comprises, by mass, 30-45% of calcium oxide, 20-30% of active silicon oxide, 10-15% of active aluminum oxide, 10-20% of iron oxide and 3-5% of sulfur trioxide;
the mass ratio of the solid waste superfine powder to water is 100: 15-18.
Preferably, the average specific surface area of the solid waste superfine powder is 650-850 m2/kg。
Preferably, the preparation raw materials further comprise an inorganic pigment, and the mass ratio of the solid waste superfine powder to the inorganic pigment is 100: 0.5-1.
The invention also provides a preparation method of the solid waste based inorganic artificial stone in the technical scheme, which comprises the following steps:
providing solid waste superfine powder;
mixing the solid waste ultrafine powder with water, and then sequentially performing curing, forming and maintaining to obtain the solid waste base inorganic artificial stone;
the maintenance comprises the wet-heat maintenance and the hot-water maintenance which are sequentially carried out.
Preferably, the temperature of the wet-heat curing is 35-45 ℃, the relative humidity is 65-85%, and the time of the wet-heat curing is 30-120 min.
Preferably, the hot water curing is to soak the product subjected to the wet heat curing in hot water, the temperature of the hot water is 45-95 ℃, and the soaking time is 1-28 days.
Preferably, the molding is static pressure molding, the pressure of the static pressure molding is 30-50 MPa, and the time is 5-10 s.
Preferably, the curing mode is closed standing, and the closed standing time is 30-60 min.
Preferably, when the preparation raw materials further comprise an inorganic pigment, the solid waste base inorganic artificial stone is a solid waste base colorful inorganic artificial stone;
the preparation method of the solid waste base color inorganic artificial stone comprises the following steps:
mixing part of the solid waste superfine powder, the inorganic pigment and part of water to obtain a surface layer raw material;
mixing the residual solid waste superfine powder and the residual water to obtain a base raw material;
respectively curing the surface layer raw material and the base layer raw material to obtain surface layer clinker and base layer clinker; stacking the surface layer clinker and the base layer clinker according to the sequence that the lower layer is a base layer clinker layer and the upper layer is a surface layer clinker layer, and then sequentially molding and maintaining to obtain the solid waste base color inorganic artificial stone;
the maintenance comprises the wet-heat maintenance and the hot-water maintenance which are sequentially carried out.
Preferably, the mass ratio of the part of the solid waste superfine powder to the rest of the solid waste superfine powder is 0.05-0.1: 1;
the mass ratio of the part of solid waste superfine powder to the part of inorganic pigment to the part of water is 100: 5-10: 15-18;
the mass ratio of the residual solid waste superfine powder to the residual water is 100: 15-18.
The invention provides a solid waste based inorganic artificial stone, which comprises the following raw materials of solid waste superfine powder and water; the solid waste superfine powder comprises, by mass, 30-45% of calcium oxide, 20-30% of active silicon oxide, 10-15% of active aluminum oxide, 10-20% of iron oxide and 3-5% of sulfur trioxide; the mass ratio of the solid waste superfine powder to water is 100: 15-18. In the invention, the active alumina and the active silica in the solid waste superfine powder react with calcium oxide in an aqueous medium to generate calcium silicate and calcium aluminate gelled substances, thereby realizing the gelling effect. The invention takes the solid waste superfine powder as the raw material, does not need to add extra organic auxiliary agent and aggregate, and provides an effective way for the resource utilization of the solid waste.
The invention also provides a method for preparing the solid waste based inorganic artificial stone in the technical scheme, which comprises the following steps: providing solid waste superfine powder; mixing the solid waste ultrafine powder with water, and then sequentially performing curing, forming and maintaining to obtain the solid waste base inorganic artificial stone; the maintenance comprises the wet-heat maintenance and the hot-water maintenance which are sequentially carried out. The invention improves the compressive strength of the solid waste based inorganic artificial stone under the combined action of the damp-heat curing and the hot-water curing.
Detailed Description
The invention provides a solid waste based inorganic artificial stone, which comprises the following raw materials of solid waste superfine powder and water;
the solid waste superfine powder comprises, by mass, 30-45% of calcium oxide, 20-30% of active silicon oxide, 10-15% of active aluminum oxide, 10-20% of iron oxide and 3-5% of sulfur trioxide;
the mass ratio of the solid waste superfine powder to water is 100: 15-18.
In the invention, the preparation raw materials comprise solid waste superfine powder. In the invention, the average specific surface area of the solid waste superfine powder is preferably 650-850 m2/kg, more preferably 660 to 750m2/kg, further preferredIs selected as 680m2In terms of/kg. The invention limits the average specific surface area of the solid waste superfine powder in the range, is beneficial to exciting the gelling activity of the solid waste superfine powder and improving the compressive strength of the solid waste based inorganic artificial stone.
The solid waste superfine powder contains 30-45% of calcium oxide by mass percentage, and preferably 35-40%.
The solid waste superfine powder contains 20-30% of active silicon oxide by mass percent, preferably 24-28%, and more preferably 26.6%.
The solid waste superfine powder contains 10-15% of active alumina by mass percentage, and preferably 12-14%.
The solid waste superfine powder contains 10-20% of iron oxide by mass percentage, preferably 11-15%, and more preferably 12-13%.
The solid waste superfine powder contains 3-5% of sulfur trioxide by mass percentage, and preferably 3.5-4.5%.
In the present invention, the particle size of the solid waste ultrafine powder is preferably 15 μm or less, more preferably 5 to 10 μm, and still more preferably 8.5 μm.
In the invention, the activated alumina, the activated silica and the calcium oxide in the solid waste superfine powder take water as a medium to generate reaction to generate calcium silicate and calcium aluminate as gelled substances, so that the gelling effect is realized, and other gelled substances do not need to be additionally added.
In the present invention, the preparation raw material further includes water. In the invention, the mass ratio of the solid waste superfine powder to water is 100: 15-18, preferably 100: 16-17.
In the invention, the raw materials for preparing the solid waste-based inorganic artificial stone also preferably comprise inorganic pigments, and the inorganic pigments preferably comprise one or more of iron oxide red, iron oxide blue and iron oxide green, and more preferably iron oxide red. In the present invention, when the inorganic pigment is two or more of the above-mentioned specific substances, the compounding ratio of the above-mentioned specific substances is not particularly limited, and the compounding ratio may be carried out according to a desired color. In the invention, the mass ratio of the solid waste superfine powder to the inorganic pigment is preferably 100: 0.5-1, more preferably 100: 0.8 to 1.
When the raw materials for preparing the solid waste base inorganic artificial stone comprise inorganic pigments, the prepared solid waste base inorganic artificial stone is a solid waste base colorful inorganic artificial stone.
The invention also provides a preparation method of the solid waste based inorganic artificial stone in the technical scheme, which comprises the following steps:
providing solid waste superfine powder;
mixing the solid waste ultrafine powder with water, and then sequentially performing curing, forming and maintaining to obtain the solid waste base inorganic artificial stone;
the maintenance comprises the wet-heat maintenance and the hot-water maintenance which are sequentially carried out.
The invention provides solid waste superfine powder. In the present invention, the solid waste ultrafine powder is preferably prepared by mixing solid waste and then micronizing. In the present invention, the solid waste preferably includes three or more of steel slag, blast furnace slag, fly ash, desulfurized gypsum and carbide slag. The invention has no special limit on the proportion of the specific substances, and can ensure that the solid waste superfine powder with the component proportion in the technical scheme can be obtained according to actual conditions. In the embodiment of the invention, the solid waste is a mixture of steel slag, fly ash, desulfurized gypsum and carbide slag; or a mixture of steel slag, blast furnace slag, fly ash, desulfurized gypsum and carbide slag. The mixing is not particularly limited in the present invention as long as it can be mixed uniformly. The ultrafine pulverization is not particularly limited in the present invention as long as the desired average specific surface area can be achieved. In the embodiment of the invention, the superfine grinding adopts a supersonic steam flow superfine grinding system. The invention limits the average specific surface area of the solid waste superfine powder in the range, is beneficial to exciting the gelling activity of the solid waste superfine powder and improving the compressive strength of the solid waste based inorganic artificial stone.
After the solid waste ultrafine powder is obtained, the solid waste ultrafine powder and water are mixed, and then curing, forming and maintaining are sequentially carried out to obtain the solid waste base inorganic artificial stone; the maintenance comprises the wet-heat maintenance and the hot-water maintenance which are sequentially carried out. The mixing is not particularly limited in the present invention as long as it can be mixed uniformly. In the invention, the curing mode is preferably closed standing, and the closed standing time is preferably 30-60 min, and more preferably 35-45 min. The sealing mode is not particularly limited, and the surface layer raw material is placed in a plastic package bag to be sealed in the embodiment of the invention.
In the invention, the molding is preferably static pressure molding, and the pressure of the static pressure molding is preferably 30-50 MPa, and more preferably 40-45 MPa; the time is preferably 5 to 10 seconds, and more preferably 6 to 8 seconds. In the present invention, the molding is preferably performed in a mold; the shape and the size of the die are not specially limited, and the die can be set according to requirements. The embodiment of the invention selects a brick-making steel die. In the present invention, it is preferable to perform a mold release treatment after the molding is completed.
In the invention, the temperature of the damp-heat curing is preferably 30-45 ℃, and more preferably 35-40 ℃; the relative humidity of the damp-heat curing is preferably 65-85%, and more preferably 70-80%; the time for the wet and hot curing is preferably 30-120 min, and more preferably 60-80 min. In the invention, the hot water curing is preferably carried out by soaking the product subjected to the hot water curing in hot water, wherein the temperature of the hot water is preferably 45-95 ℃, and more preferably 50-60 ℃; the soaking time is preferably 1 to 28 days, and more preferably 7 to 14 days.
In the invention, the effect of the wet-heat curing is to realize that the product can rapidly carry out hydration reaction in a milder environment and finish initial solidification, so that the product does not crack or pulverize during the subsequent hot water curing; the hot water maintenance has the advantages that the hot water maintenance is used for enabling the product to perform hydration reaction in water with a certain temperature, the maintenance of the certain temperature is favorable for promoting the hydration reaction, the hardening time is shortened, the maintenance in the water is favorable for ensuring the humidity of 100% of the product maintenance and the balance of the water pressure inside and outside the product, holes and gaps caused by the escape of the water inside the product during the product maintenance process are effectively avoided, the quality defect of the product is avoided, and therefore the product with higher compactness and strength is obtained. The invention improves the compressive strength of the solid waste based inorganic artificial stone under the combined action of the damp-heat curing and the hot-water curing.
In the present invention, after the hot water curing, the hot water cured product is preferably polished and waxed. The polishing and waxing according to the present invention are not particularly limited, and may be performed by a method conventional in the art.
In the invention, when the preparation raw materials further comprise inorganic pigment, the solid waste base inorganic artificial stone is solid waste base colorful inorganic artificial stone;
the preparation method of the solid waste base color inorganic artificial stone preferably comprises the following steps:
firstly mixing part of the solid waste superfine powder, the inorganic pigment and part of water to obtain a surface layer raw material;
carrying out second mixing on the residual solid waste superfine powder and the residual water to obtain a base raw material;
respectively curing the surface layer raw material and the base layer raw material to obtain surface layer clinker and base layer clinker;
stacking the surface layer clinker and the base layer clinker according to the sequence that the lower layer is a base layer clinker layer and the upper layer is a surface layer clinker layer, and then sequentially molding and maintaining to obtain the solid waste base color inorganic artificial stone;
the maintenance comprises the wet-heat maintenance and the hot-water maintenance which are sequentially carried out.
In the invention, part of solid waste superfine powder, inorganic pigment and part of water are mixed to obtain the surface layer raw material. In the invention, the mass ratio of the part of the solid waste superfine powder to the inorganic pigment is preferably 100: 5-10, and more preferably 100: 10. In the invention, the mass ratio of the part of the solid waste superfine powder to the part of water is preferably 100: 15-18, and more preferably 100: 16-17.
In the present invention, the mixing preferably comprises the steps of: mixing part of the solid waste superfine powder and the inorganic pigment to obtain a primary surface raw material, and mixing the primary surface raw material with part of water to obtain the surface raw material. The invention has no special limitation on the mixing of the part of the solid waste superfine powder and the inorganic pigment, as long as the uniform mixing can be ensured. In the invention, the mixing with the part of water is preferably carried out under the condition of stirring, and the rotating speed of the stirring is preferably 100-200 r/min, and more preferably 120-150 r/min; the time is preferably 2 to 7min, and more preferably 3 to 5 min.
The invention mixes the residual solid waste superfine powder and the residual water to obtain the basic raw material. In the invention, the mass ratio of the part of the solid waste superfine powder to the rest of the solid waste superfine powder is preferably 0.05-0.1: 1, and more preferably 0.07-0.08: 1; the mass ratio of the residual solid waste superfine powder to the residual water is preferably 100: 15-18, and more preferably 100: 16-17. In the invention, the mixing is preferably carried out under the condition of stirring, and the rotating speed of the stirring is preferably 100-200 r/min, and more preferably 120-150 r/min; the time is preferably 2 to 7min, and more preferably 3 to 5 min.
The present invention does not have any particular limitation on the order of preparing the base layer raw material and the top layer raw material, that is, it may be prepared either by preparing the top layer raw material first and then preparing the base layer raw material or by preparing the top layer raw material first and then preparing the top layer raw material.
After the base layer raw material and the surface layer raw material are obtained, the surface layer raw material and the base layer raw material are respectively cured to obtain surface layer clinker and base layer clinker. In the present invention, the aging is preferably performed by allowing the surface layer raw material or the base layer raw material to stand in a closed environment for 30 to 60min, and more preferably 35 to 45 min. The sealing mode is not particularly limited, and in the embodiment of the invention, the surface layer raw material or the base layer raw material is placed in the plastic packaging bag for sealing.
After obtaining base clinker and surface clinker, sequentially stacking the surface clinker and the base clinker in the order of a base clinker layer on the lower layer and a surface clinker layer on the upper layer, and then sequentially forming and maintaining to obtain the solid waste base color inorganic artificial stone; the maintenance comprises the wet-heat maintenance and the hot-water maintenance which are sequentially carried out.
In the present invention, the forming and curing process preferably refers to the process described in the above technical solution, and is not described herein again.
The solid waste-based inorganic artificial stone is prepared from solid wastes such as fly ash, steel slag, blast furnace slag, desulfurized gypsum or carbide slag and the like, and the raw materials are wide in source and low in cost, so that an effective way is provided for resource utilization of the solid wastes. The preparation method is simple and easy to implement, and is easy to realize industrial production.
In order to further illustrate the present invention, the following embodiments are described in detail, but they should not be construed as limiting the scope of the present invention.
Example 1
Ultramicro crushing 3.3kg of steel slag, 1.65kg of fly ash and 0.55kg of desulfurized gypsum into the powder with the specific average specific surface area of 680m by using an ultrasonic steam flow ultramicro crushing system2Per kg of solid waste superfine powder with the grain diameter of 8.5 mu m; the content of calcium oxide in the solid waste superfine powder is 31.7%, the content of active silicon oxide is 26.6%, the content of active aluminum oxide is 15%, the content of ferric oxide is 11%, and the content of sulfur trioxide is 5%;
mixing 0.5kg of solid waste superfine powder and 0.05kg of iron oxide red, and stirring the mixture of the solid waste superfine powder and the iron oxide red and 0.08kg of water at the rotating speed of 140r/min for 5min to obtain a surface layer raw material; placing the surface layer raw material in a plastic package bag, sealing and standing for 30min to obtain surface layer clinker;
stirring 5kg of solid waste superfine powder and 0.8kg of water at the rotating speed of 140r/min for 5min to obtain a base raw material; placing the base layer raw material in a plastic package bag, sealing and standing for 30min to obtain base layer clinker;
transferring the base clinker into a brick making steel die, transferring the surface clinker to the surface of the base clinker, and carrying out static pressure forming for 10s under the pressure of 50 MPa; carrying out damp-heat curing on the product subjected to static pressure forming for 1h in an environment with the temperature of 45 ℃ and the relative humidity of 80%, and then soaking in hot water at the temperature of 50 ℃ for 28 days; and polishing and waxing the artificial stone cured by hot water to obtain the solid waste base inorganic artificial stone.
Example 2
The waste inorganic artificial stone was produced by the method of example 1 except that no surface layer was provided.
Example 3
A solid waste-based inorganic artificial stone was produced by the method of example 1, except that the pressure of the static press molding was 40 MPa.
Example 4
A solid waste-based inorganic artificial stone was produced by the method of example 1, except that the pressure of the static press molding was 30 MPa.
Example 5
The solid waste-based inorganic artificial stone was prepared according to the method of example 1, except that 0.5kg of blast furnace slag was added to the solid waste ultra fine powder used for preparing the base raw material.
Example 6
A solid waste-based inorganic artificial stone was produced according to the method of example 4, except that the mass of the blast furnace slag was 1.5 kg.
Comparative example 1
The waste inorganic artificial stone was prepared according to the method of example 1, except that the curing was not carried out with hot water, and the curing was carried out only under the conditions of curing temperature of 45 ℃ and relative humidity of 80% for 28 days with hot-humid curing.
Comparative example 2
The waste inorganic artificial stone was prepared according to the method of example 1, except that the curing was performed for 3 days by moist heat, and then the stone was cured in hot water at 50 ℃ for 28 days.
The compressive strength of the solid waste inorganic artificial stone prepared in examples 1 to 6 and comparative examples 1 and 2 was measured according to the national standard (GB/T9966.1), and the results are shown in Table 1.
TABLE 1 compression Strength of solid waste based inorganic artificial stone prepared in examples 1-6 and comparative examples 1 and 2
Examples Compressive strength (MPa)
Example 1 145.5
Example 2 144.5
Example 3 141.3
Example 4 132.5
Example 5 157.8
Example 6 149.2
Comparative example 1 125.9
Comparative example 2 137.4
Combining the data of example 1 and comparative examples 1 and 2, it can be seen that under the curing conditions defined in the present invention, solid waste-based inorganic artificial stone with high compressive strength can be prepared. From the results in table 1, it can be seen that the solid waste inorganic artificial stone prepared by the preparation method provided by the invention has higher compressive strength.
Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and the embodiments are within the scope of the present invention.

Claims (7)

1. A solid waste based inorganic artificial stone is prepared from solid waste superfine powder and water;
the solid waste superfine powder comprises, by mass, 30-45% of calcium oxide, 20-30% of active silicon oxide, 10-15% of active aluminum oxide, 10-20% of iron oxide and 3-5% of sulfur trioxide;
the mass ratio of the solid waste superfine powder to water is 100: 15-18;
the preparation method of the solid waste based inorganic artificial stone comprises the following steps:
providing solid waste superfine powder;
mixing the solid waste ultrafine powder with water, and then sequentially performing curing, forming and maintaining to obtain the solid waste base inorganic artificial stone;
the maintenance comprises the steps of moist heat maintenance and hot water maintenance which are sequentially carried out;
the forming is static pressure forming, the pressure of the static pressure forming is 30-50 MPa, and the time is 5-10 s;
the temperature of the wet-heat curing is 35-45 ℃, the relative humidity is 65-85%, and the time of the wet-heat curing is 30-120 min.
2. The solid waste-based inorganic artificial stone according to claim 1, wherein the average specific surface area of the solid waste ultra-fine powder is 650 to 850m2/kg。
3. The solid waste based inorganic artificial stone according to claim 1 or 2, wherein the raw material for preparation further comprises an inorganic pigment, and the mass ratio of the solid waste ultra-fine powder to the inorganic pigment is 100: 0.5-1.
4. The method for preparing the solid waste inorganic artificial stone according to any one of claims 1 to 3, comprising the steps of:
providing solid waste superfine powder;
mixing the solid waste ultrafine powder with water, and then sequentially performing curing, forming and maintaining to obtain the solid waste base inorganic artificial stone;
the maintenance comprises the steps of moist heat maintenance and hot water maintenance which are sequentially carried out;
the forming is static pressure forming, the pressure of the static pressure forming is 30-50 MPa, and the time is 5-10 s;
the temperature of the wet-heat curing is 35-45 ℃, the relative humidity is 65-85%, and the time of the wet-heat curing is 30-120 min.
5. The method according to claim 4, wherein the hot-water curing comprises soaking the product after the hot-water curing in hot water at a temperature of 45-95 ℃ for 1-28 days.
6. The preparation method according to claim 4, wherein the curing is performed by closed standing for 30-60 min.
7. The production method according to claim 4, wherein when the raw material for production further comprises an inorganic pigment, the solid waste-based inorganic artificial stone is a solid waste-based colored inorganic artificial stone;
the preparation method of the solid waste base color inorganic artificial stone comprises the following steps:
mixing part of the solid waste superfine powder, the inorganic pigment and part of water to obtain a surface layer raw material;
mixing the residual solid waste superfine powder and the residual water to obtain a base raw material;
respectively curing the surface layer raw material and the base layer raw material to obtain surface layer clinker and base layer clinker;
stacking the surface layer clinker and the base layer clinker according to the sequence that the lower layer is a base layer clinker layer and the upper layer is a surface layer clinker layer, and then sequentially molding and maintaining to obtain the solid waste base color inorganic artificial stone;
the maintenance comprises the wet-heat maintenance and the hot-water maintenance which are sequentially carried out.
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