CN113307567B - Autoclaved floor tile and preparation method thereof - Google Patents

Autoclaved floor tile and preparation method thereof Download PDF

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CN113307567B
CN113307567B CN202110580290.1A CN202110580290A CN113307567B CN 113307567 B CN113307567 B CN 113307567B CN 202110580290 A CN202110580290 A CN 202110580290A CN 113307567 B CN113307567 B CN 113307567B
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parts
autoclaved
floor tile
fine sand
mass
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CN113307567A (en
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李从波
方飞
彭峰
詹镇峰
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Guangzhou 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
    • C04B28/02—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
    • 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
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • C04B18/023—Fired or melted materials
    • 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
    • C04B18/0481—Other specific industrial waste materials not provided for elsewhere in C04B18/00
    • 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
    • C04B18/165—Ceramic waste
    • 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
    • C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses an autoclaved floor tile and a preparation method thereof. The autoclaved floor tile comprises the following components in parts by mass: alkali residue-kaolin mixed calcined material: 30-60 parts; cement: 5-30 parts of a solvent; grinding fine sand: 0-50 parts; fine sand: 0-30 parts of a solvent; ceramic polishing slag: 0 to 40 parts. The preparation method of the autoclaved floor tile comprises the following steps: mixing the alkali residue-kaolin mixed calcination material, cement, ground fine sand, fine sand and ceramic polishing residue, performing dry stirring, adding water, stirring, injecting into a mold, performing compression molding, and performing autoclaved curing to obtain the autoclaved floor tile. The autoclaved floor tile has the advantages of high compressive strength, low water absorption rate, excellent water resistance, simple preparation process, low energy consumption, capability of consuming a large amount of alkaline residues and ceramic polishing residues, and suitability for large-area popularization and application.

Description

Autoclaved floor tile and preparation method thereof
Technical Field
The invention relates to the technical field of building materials, in particular to an autoclaved floor tile and a preparation method thereof.
Background
The caustic sludge is the waste residue discharged in the process of preparing the soda ash by the ammonia-soda process in the soda industry, and the soda ash is widely applied as a basic chemical raw material. At present, soda manufacturing enterprises mainly use an ammonia-soda process to prepare soda ash, and the discharge rate of each 1 ton of soda ash produced is 10m3The waste liquid of the method is about 300 kg-600 kg of solid waste residues in the waste liquid, and most alkali manufacturing enterprises discharge the waste liquid into the sea or stack the waste liquid in a slag yard to greatly influence the ecological environment. The caustic sludge is a white paste, has high water content and smooth hand feeling, mainly comprises calcium carbonate, calcium sulfate and the like, has the characteristics of strong alkalinity, high chloride ion content and high sulfate radical content, and is difficult to treat. In recent years, a plurality of scholars are devoted to the utilization research of caustic sludge, but no reasonable caustic sludge treatment method is developed so far, and how to effectively treat the caustic sludge is a difficult problem to be solved urgently by an alkali making enterprise.
The ceramic polishing slag is solid waste generated in the production process of polished tiles (for example, deep processing procedures such as leveling, thickness setting, grinding, polishing, edging and chamfering and the like are carried out on green tiles). In recent years, the output of the architectural ceramics in China exceeds 80 hundred million square meters, wherein more than half of polished tiles account for 1m of the architectural ceramics produced in China21.8 kg-2.2 kg of brick scraps can be generated from the polished brick, most production enterprises adopt a treatment mode similar to that of caustic sludge,not only occupies large-area cultivated land, but also causes air pollution and water resource pollution, and seriously destroys the ecological environment.
In summary, it is urgently needed to solve the problems of air pollution and water resource pollution, large-area cultivated land occupation, serious resource waste and the like caused by improper treatment of alkaline residues and ceramic polishing residues.
Disclosure of Invention
The invention aims to provide an autoclaved floor tile and a preparation method thereof.
The technical scheme adopted by the invention is as follows:
an autoclaved floor tile comprises the following components in parts by mass:
alkali residue-kaolin mixed calcined material: 30-60 parts;
cement: 5-30 parts of a solvent;
grinding fine sand: 0-50 parts;
fine sand: 0-30 parts of a solvent;
ceramic polishing slag: 0 to 40 parts.
Preferably, the autoclaved floor tile comprises the following components in parts by mass:
alkali residue-kaolin mixed calcined material: 30-60 parts;
cement: 5-15 parts of a solvent;
grinding fine sand: 20-50 parts of a solvent;
fine sand: 0-10 parts;
ceramic polishing slag: 0 to 30 parts.
Preferably, the caustic sludge-kaolin mixed calcined material is prepared by calcining 50-100: 0-50 mass ratio of caustic sludge and kaolin.
Preferably, the caustic sludge-kaolin mixed calcined material is prepared by calcining caustic sludge and kaolin in a mass ratio of 60-90: 10-40.
Preferably, the water content of the caustic sludge>40% of CaCO in a dry matter content of 56wt%325wt% of CaSO4·2H2O, 10wt% of Mg (OH)2And 4wt% of CaCl2·2H2O。
Preferably, the kaolin clay contains 48wt%SiO of (2)2And 40wt% of Al2O3。
Preferably, the caustic sludge-kaolin mixed calcined material is prepared by the following method:
1) mixing the caustic sludge, kaolin, a naphthalene dispersant and water, and stirring to obtain caustic sludge-kaolin mixed slurry;
2) drying the alkali residue-kaolin mixed slurry, and cutting into blocks to obtain a blocky mixed material (the contact area between the blocky mixed material and air can be increased by cutting the blocky mixed material into small blocks, and the blocky mixed material has a promoting effect on subsequent calcination);
3) adding the block-shaped mixture into a high-temperature furnace, heating to 500-900 ℃ at the speed of 3-7 ℃/min, calcining for 2-5 h, and then performing ball milling until powder can pass through a 0.08mm square-hole sieve, thus obtaining the caustic sludge-kaolin mixed calcined material.
Preferably, the additive amount of the naphthalene dispersant in the step 1) is 0-3% of the total mass of the caustic sludge and the kaolin.
Preferably, the adding amount of the water in the step 1) is 100-150% of the total mass of the caustic sludge and the kaolin.
Preferably, the cement is ordinary portland cement with a strength grade of 42.5.
Preferably, the fine sand is prepared by ball milling fine sand, and the screen allowance of the fine sand passing through a 0.08mm square hole screen is less than or equal to 10%.
Preferably, the fine sand may pass through a 1.18mm square mesh screen.
Preferably, the water content of the ceramic polishing slag>38% of SiO in dry material2And 17wt% of Al2O3。
The preparation method of the autoclaved floor tile comprises the following steps: mixing the alkali residue-kaolin mixed calcination material, cement, ground fine sand, fine sand and ceramic polishing residue, performing dry stirring, adding water, stirring, injecting into a mold, performing compression molding, and performing autoclaved curing to obtain the autoclaved floor tile.
Preferably, the addition amount of the water is 20-25% of the total mass of the caustic sludge-kaolin mixed calcined material, the cement, the fine grinding sand, the fine sand and the ceramic polishing slag.
Preferably, the pressing speed of the compression molding is 0.5 kN/s-1.5 kN/s, the molding pressure is 15 MPa-25 MPa, and the pressure maintaining time is 30 s-90 s.
Preferably, the steam pressure curing is carried out at 180-200 ℃, and the steam pressure is 1.0-1.5 MPa.
The invention has the beneficial effects that: the autoclaved floor tile has the advantages of high compressive strength, low water absorption rate, excellent water resistance, simple preparation process, low energy consumption, capability of consuming a large amount of alkaline residues and ceramic polishing residues, and suitability for large-area popularization and application.
Specifically, the method comprises the following steps:
1) the autoclaved floor tile has the advantages of high compressive strength, high softening coefficient, low water absorption and excellent overall performance;
2) the autoclaved floor tile can consume a large amount of two industrial wastes of alkaline residues and ceramic polishing residues, not only solves the problems of air pollution, water resource pollution and large-area cultivated land occupation caused by improper treatment of the alkaline residues and the ceramic polishing residues, but also realizes the recycling of resources, and is green and environment-friendly;
3) according to the invention, the caustic sludge and the kaolin are mixed and then calcined at low temperature (500-900 ℃) to prepare the calcined material, the calcination temperature is relatively low, the energy consumption is low, the energy is saved and the environment is protected, and the calcined material, the cement and the ground sand are matched to prepare the autoclaved silicate product with excellent performance.
Detailed Description
The invention will be further explained and illustrated with reference to specific examples.
The indexes of the raw materials in examples 1 to 7 are as follows:
alkali residue: water content ratio>40% of CaCO in a dry matter content of 56wt%325wt% of CaSO4·2H2O, 10wt% of Mg (OH)2And 4wt% of CaCl2·2H2O；
Kaolin: containing 48% by weight of SiO2And 40wt% of Al2O3；
Grinding fine sand: the screen allowance of the square hole screen of 0.08mm is less than or equal to 10 percent;
fine sand: can pass through a 1.18mm square hole sieve;
ceramic polishing slag: water content ratio>38% of SiO in dry material2And 17wt% of Al2O3；
Cement: portland cement of strength grade 42.5;
naphthalene dispersant: the main component of the FDN naphthalene-based high-efficiency water reducing agent of Shandong Wanshan chemical industry Co., Ltd is beta-naphthalenesulfonic acid formaldehyde condensation compound sodium salt, the appearance is a tan viscous liquid, the solid content is 0.5-0.75%, and the specific gravity is 1.20 kg/L-1.25 kg/L.
Example 1:
the preparation method of the autoclaved floor tile comprises the following steps:
1) mixing 80 parts by mass of caustic sludge, 20 parts by mass of kaolin, 3 parts by mass of naphthalene dispersant and 120 parts by mass of water, stirring for 3min to obtain caustic sludge-kaolin mixed slurry, drying the caustic sludge-kaolin mixed slurry, cutting into blocks to obtain a block mixture, placing the block mixture into a corundum crucible, adding the corundum crucible into a high-temperature furnace, heating to 700 ℃ at the speed of 5 ℃/min, calcining for 3h, and performing ball milling until powder can pass through a 0.08mm square-hole sieve to obtain a caustic sludge-kaolin mixed calcined material;
2) mixing 45 parts by mass of an alkali residue-kaolin mixed calcined material, 5 parts by mass of cement and 50 parts by mass of ground sand, dry-stirring for 1min, adding 25 parts by mass of water, stirring for 3min, injecting into a standard brick mold, press-forming on a pressure testing machine, controlling the pressurizing speed at 1kN/s, the forming pressure at 20MPa and the pressure maintaining time at 1min, transferring to an autoclave, heating to 192 ℃ within 2h, controlling the autoclaving pressure at 1.3MPa, keeping the temperature for 8h, and cooling to room temperature within 3h to obtain the autoclaved floor tile.
Example 2:
the preparation method of the autoclaved floor tile comprises the following steps:
1) mixing 80 parts by mass of caustic sludge, 20 parts by mass of kaolin, 3 parts by mass of naphthalene dispersant and 120 parts by mass of water, stirring for 3min to obtain caustic sludge-kaolin mixed slurry, drying the caustic sludge-kaolin mixed slurry, cutting into blocks to obtain a block mixture, placing the block mixture into a corundum crucible, adding the corundum crucible into a high-temperature furnace, heating to 800 ℃ at the speed of 5 ℃/min, calcining for 3h, and performing ball milling until powder can pass through a 0.08mm square-hole sieve to obtain a caustic sludge-kaolin mixed calcined material;
2) mixing 45 parts by mass of an alkali residue-kaolin mixed calcined material, 5 parts by mass of cement and 50 parts by mass of ground sand, dry-stirring for 1min, adding 25 parts by mass of water, stirring for 3min, injecting into a standard brick mold, press-forming on a pressure testing machine, controlling the pressurizing speed at 1kN/s, the forming pressure at 20MPa and the pressure maintaining time at 1min, transferring to an autoclave, heating to 192 ℃ within 2h, controlling the autoclaving pressure at 1.3MPa, keeping the temperature for 8h, and cooling to room temperature within 3h to obtain the autoclaved floor tile.
Example 3:
the preparation method of the autoclaved floor tile comprises the following steps:
1) mixing 80 parts by mass of caustic sludge, 20 parts by mass of kaolin and 120 parts by mass of water, stirring for 3min to obtain caustic sludge-kaolin mixed slurry, drying the caustic sludge-kaolin mixed slurry, cutting into blocks to obtain a block mixture, placing the block mixture into a corundum crucible, adding the corundum crucible into a high-temperature furnace, heating to 700 ℃ at the speed of 5 ℃/min, calcining for 3h, and performing ball milling until powder can pass through a 0.08mm square-hole sieve to obtain a caustic sludge-kaolin mixed calcined material;
2) mixing 45 parts by mass of an alkali residue-kaolin mixed calcined material, 5 parts by mass of cement and 50 parts by mass of ground sand, dry-stirring for 1min, adding 25 parts by mass of water, stirring for 3min, injecting into a standard brick mold, press-forming on a pressure testing machine, controlling the pressurizing speed at 1kN/s, the forming pressure at 20MPa and the pressure maintaining time at 1min, transferring to an autoclave, heating to 192 ℃ within 2h, controlling the autoclaving pressure at 1.3MPa, keeping the temperature for 8h, and cooling to room temperature within 3h to obtain the autoclaved floor tile.
Example 4:
the preparation method of the autoclaved floor tile comprises the following steps:
1) mixing 70 parts by mass of caustic sludge, 30 parts by mass of kaolin, 3 parts by mass of naphthalene dispersant and 120 parts by mass of water, stirring for 3min to obtain caustic sludge-kaolin mixed slurry, drying the caustic sludge-kaolin mixed slurry, cutting into blocks to obtain a block mixture, placing the block mixture into a corundum crucible, adding the corundum crucible into a high-temperature furnace, heating to 700 ℃ at the speed of 5 ℃/min, calcining for 3h, and performing ball milling until powder can pass through a 0.08mm square-hole sieve to obtain a caustic sludge-kaolin mixed calcined material;
2) mixing 45 parts by mass of an alkali residue-kaolin mixed calcined material, 5 parts by mass of cement and 50 parts by mass of ground sand, dry-stirring for 1min, adding 25 parts by mass of water, stirring for 3min, injecting into a standard brick mold, press-forming on a pressure testing machine, controlling the pressurizing speed at 1kN/s, the forming pressure at 20MPa and the pressure maintaining time at 1min, transferring to an autoclave, heating to 192 ℃ within 2h, controlling the autoclaving pressure at 1.3MPa, keeping the temperature for 8h, and cooling to room temperature within 3h to obtain the autoclaved floor tile.
Example 5:
the preparation method of the autoclaved floor tile comprises the following steps:
1) mixing 80 parts by mass of caustic sludge, 20 parts by mass of kaolin, 3 parts by mass of naphthalene dispersant and 120 parts by mass of water, stirring for 3min to obtain caustic sludge-kaolin mixed slurry, drying the caustic sludge-kaolin mixed slurry, cutting into blocks to obtain a block mixture, placing the block mixture into a corundum crucible, adding the corundum crucible into a high-temperature furnace, heating to 700 ℃ at the speed of 5 ℃/min, calcining for 3h, and performing ball milling until powder can pass through a 0.08mm square-hole sieve to obtain a caustic sludge-kaolin mixed calcined material;
2) mixing 45 parts by mass of an alkali residue-kaolin mixed calcined material, 5 parts by mass of cement, 40 parts by mass of fine sand and 10 parts by mass of fine sand, stirring for 1min, adding 25 parts by mass of water, stirring for 3min, injecting into a standard brick mold, pressing and molding on a pressure testing machine, controlling the pressurizing speed at 1kN/s and the molding pressure at 20MPa, maintaining the pressure for 1min, transferring to an autoclave, heating to 192 ℃ within 2h, controlling the autoclave pressure at 1.3MPa, keeping the temperature for 8h, and cooling to room temperature within 3h to obtain the autoclaved floor tile.
Example 6:
the preparation method of the autoclaved floor tile comprises the following steps:
1) mixing 80 parts by mass of caustic sludge, 20 parts by mass of kaolin, 3 parts by mass of naphthalene dispersant and 120 parts by mass of water, stirring for 3min to obtain caustic sludge-kaolin mixed slurry, drying the caustic sludge-kaolin mixed slurry, cutting into blocks to obtain a block mixture, placing the block mixture into a corundum crucible, adding the corundum crucible into a high-temperature furnace, heating to 700 ℃ at the speed of 5 ℃/min, calcining for 3h, and performing ball milling until powder can pass through a 0.08mm square-hole sieve to obtain a caustic sludge-kaolin mixed calcined material;
2) mixing 45 parts by mass of an alkali residue-kaolin mixed calcined material, 5 parts by mass of cement, 20 parts by mass of fine sand, 10 parts by mass of fine sand and 20 parts by mass of ceramic polishing slag, dry-stirring for 1min, adding 25 parts by mass of water, stirring for 3min, injecting into a standard brick mold, press-forming on a pressure testing machine, controlling the pressurizing speed at 1kN/s, the forming pressure at 20MPa, maintaining the pressure for 1min, transferring to an autoclave, heating to 192 ℃ within 2h, controlling the autoclave pressure at 1.3MPa, keeping the temperature for 8h, and cooling to room temperature within 3h to obtain the autoclaved floor tile.
Example 7:
the preparation method of the autoclaved floor tile comprises the following steps:
1) mixing 80 parts by mass of caustic sludge, 20 parts by mass of kaolin, 3 parts by mass of naphthalene dispersant and 120 parts by mass of water, stirring for 3min to obtain caustic sludge-kaolin mixed slurry, drying the caustic sludge-kaolin mixed slurry, cutting into blocks to obtain a blocky mixture, placing the blocky mixture into a corundum crucible, adding the corundum crucible into a high-temperature furnace, heating to 700 ℃ at the speed of 5 ℃/min, calcining for 3h, and performing ball milling until powder can pass through a 0.08mm square-hole sieve to obtain a caustic sludge-kaolin mixed calcined material;
2) mixing 45 parts by mass of an alkali residue-kaolin mixed calcined material, 5 parts by mass of cement, 20 parts by mass of fine sand and 30 parts by mass of ceramic polishing slag, stirring for 1min, adding 25 parts by mass of water, stirring for 3min, injecting a standard brick mold, pressing and molding on a pressure tester, controlling the pressurizing speed at 1kN/s and the molding pressure at 20MPa, keeping the pressure for 1min, transferring to a still kettle, heating to 192 ℃ within 2h, controlling the still pressure at 1.3MPa, keeping the temperature for 8h, and cooling to room temperature within 3h to obtain the autoclaved floor tile.
And (4) performance testing:
the autoclaved floor tiles of examples 1-7 are subjected to performance tests according to the standards of JG/T505-2016 construction waste recycled aggregate solid bricks and CJ/T400-2012 recycled aggregate floor tiles and permeable bricks, and the test results are shown in the following table:
TABLE 1 Performance test results for autoclaved floor tiles of examples 1-7
Figure BDA0003085802870000061
As can be seen from Table 1: the compressive strength of the autoclaved floor bricks in the embodiments 1-7 all meet the requirement of MU20 strength grade compressive strength in JG/T505 and 2016 building garbage recycled aggregate solid bricks, the water absorption is less than 13 percent of the requirement of A grade density grade, and the softening coefficients are all more than 0.80; the compressive strength of the autoclaved floor tile in the example 7 meets the requirement of MU40 strength grade compressive strength in CJ/T400-2012 recycled aggregate floor tile and permeable brick, and the water absorption is less than or equal to 8%. The autoclaved floor tile has the advantages of high compressive strength, low water absorption, excellent water resistance and excellent comprehensive performance, can consume a large amount of industrial waste residues, and has great significance for energy conservation and environmental protection.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (7)

1. The autoclaved floor tile is characterized by comprising the following components in parts by mass:
alkali residue-kaolin mixed calcined material: 30-60 parts;
cement: 5-30 parts of a solvent;
grinding fine sand: 20-50 parts of a solvent;
fine sand: 0-30 parts of a solvent;
ceramic polishing slag: 0-40 parts;
the alkali residue-kaolin mixed calcination material is prepared by calcining alkali residue and kaolin in a mass ratio of 60-90: 10-40;
water content of the caustic sludge>40% of CaCO in a dry matter content of 56wt%325wt% of CaSO4·2H2O, 10wt% of Mg (OH)2And 4wt% of CaCl2·2H2O。
2. The autoclaved floor tile according to claim 1, wherein: the kaolin contains 48wt% of SiO2And 40wt% of Al2O3。
3. The autoclaved floor tile according to any one of claims 1 to 2, characterized in that: the cement is ordinary portland cement with a strength grade of 42.5.
4. The autoclaved floor tile according to any one of claims 1 to 2, characterized in that: the fine sand is prepared by ball milling fine sand, and the screen allowance of the fine sand passing through a 0.08mm square hole screen is less than or equal to 10 percent.
5. The autoclaved floor tile according to any one of claims 1 to 2, characterized in that: the fine sand may pass through a 1.18mm square mesh screen.
6. The autoclaved floor tile according to any one of claims 1 to 2, characterized in that: the water content of the ceramic polishing slag>38% of SiO in dry material2And 17wt% of Al2O3。
7. The method for manufacturing the autoclaved floor tile according to any one of claims 1 to 2, characterized by comprising the steps of: mixing the alkali residue-kaolin mixed calcination material, cement, ground fine sand, fine sand and ceramic polishing residue, performing dry stirring, adding water, stirring, injecting into a mold, performing compression molding, and performing autoclaved curing to obtain the autoclaved floor tile.
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CN101560088B (en) * 2009-05-27 2012-04-18 甘立 Autoclaved ceramic slag brick taking ceramic slag as major material and production method thereof
CN106277972A (en) * 2016-08-10 2017-01-04 卓达新材料科技集团威海股份有限公司 A kind of alkaline residue building waste is non-burning brick and preparation method thereof

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