CN111606678B - Gypsum-based self-leveling floor and preparation method thereof - Google Patents
Gypsum-based self-leveling floor and preparation method thereof Download PDFInfo
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- CN111606678B CN111606678B CN201910541100.8A CN201910541100A CN111606678B CN 111606678 B CN111606678 B CN 111606678B CN 201910541100 A CN201910541100 A CN 201910541100A CN 111606678 B CN111606678 B CN 111606678B
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
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- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/16—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 calcium sulfate cements containing anhydrite, e.g. Keene's cement
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5076—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic cements
- C04B41/5089—Silica sols, alkyl, ammonium or alkali metal silicate cements
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- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- 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
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00025—Aspects relating to the protection of the health, e.g. materials containing special additives to afford skin protection
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- 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
- C04B2111/52—Sound-insulating materials
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
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Abstract
The invention provides a gypsum-based self-leveling floor, which comprises gypsum-based mortar and a coating on the surface of the gypsum-based mortar; the gypsum-based mortar comprises the following raw materials: gypsum, allochroic silica gel, phase-change material, porous mineral material, water reducing agent, latex powder, water-retaining agent, filler and water, the raw materials of the coating include: polyacrylic acid aqueous solution, allochroic silica gel, silica sol and high-molecular water-absorbing resin. The laying process of the terrace comprises: uniformly mixing other materials except water in the gypsum-based mortar; testing the standard consistency extension degree of the mixture in the last step, determining the water consumption of the standard consistency of the mixture, adding water into the mixture to prepare slurry, and paving the slurry; mixing and stirring the raw materials of the coating uniformly; drying the gypsum-based mortar and then coating a coating on the surface of the gypsum-based mortar; the terrace provided by the invention has the characteristics of environment temperature and humidity regulation, formaldehyde and other harmful gases adsorption, good mechanical property, high wear resistance and the like.
Description
Technical Field
The invention relates to the technical field of novel building materials, in particular to a gypsum-based self-leveling floor and a preparation method thereof, and specifically relates to a humidity-sensitive gypsum-based self-leveling floor and a preparation method thereof.
Background
The relative humidity of air is one of important environmental parameters closely related to life and production of people. The indoor humidity is too low or too high, which can cause discomfort for indoor personnel, and the air relative humidity is an important parameter for measuring the indoor environment, and has important significance for human health, indoor air quality and storage of articles. The national air quality standard stipulates an indoor relative humidity standard value, 40-60% of air-conditioned rooms in summer and 30-60% of heating rooms in winter. Canadian scholars Anthony v. arnndel, etc. integrate various factors, and after considering various influences of humidity on microbial growth, human morbidity, article deterioration, etc., an optimal relative humidity range is recommended to be between 40% and 60%.
The gypsum building material product is used as a building material with a porous structure, the holes of the gypsum building material product have certain moisture absorption and temperature regulation functions, in recent years, gypsum-based mortar is green and environment-friendly, and develops rapidly, but functional mortar with decoration and intelligence is rarely reported.
Disclosure of Invention
The following is a summary of the detailed description herein. This summary is not intended to limit the scope of the claims.
The application provides a gypsum-based self-leveling terrace and a preparation method thereof, which can improve the temperature and humidity environment of a room, have an adjusting effect on the temperature and humidity of indoor air, have good breathing performance, reduce the fluctuation of humidity and temperature, and have an indicating function on the humidity of the environment; and excellent mechanical properties.
The patent provides an intelligent gypsum-based self-leveling mortar which is beautiful, discolored and humidity-adjustable. The gypsum-based self-leveling mortar humidifying ability that this patent provided increases doubly than ordinary gypsum-based self-leveling mortar ability, can change colour along with ambient humidity's change moreover, has the indicative function to air humidity, and pleasing to the eye value is very high simultaneously. This patent realizes that self-leveling mortar has high hygroscopic property and indicates the dual-purpose of humidity, is a novel building material who has decorative function.
The application provides a gypsum-based self-leveling floor, which comprises gypsum-based mortar and a coating, wherein the coating is coated on the surface of the gypsum-based mortar;
the gypsum-based mortar comprises the following raw materials: gypsum, allochroic silica gel, a phase change material, a porous mineral material, a water reducing agent, latex powder, a water-retaining agent and a filler; the dosage ratio of the gypsum, the allochroic silica gel, the phase-change material, the porous mineral material, the water reducing agent, the latex powder, the water-retaining agent and the filler is 100:1-15:5-20:0-5:0.25-1:0-4:0.02-0.12:35-65 by mass, and water is added according to the water consumption of the standard consistency to prepare the gypsum-based mortar;
optionally, the gypsum-based mortar is prepared by adding water into raw materials of gypsum, allochroic silicagel, a phase change material, a porous mineral material, a water reducing agent, latex powder, a water retaining agent and a filler according to the mass ratio of 100:1-10:5-10:0-4:0.3-0.8:1-3:0.05-0.1:45-60 in parts by mass and using water according to the water consumption of the standard consistency;
optionally, the raw materials of the gypsum-based mortar comprise gypsum, allochroic silica gel, a phase change material, a porous mineral material, a water reducing agent, latex powder, a water-retaining agent and a filler.
The coating comprises the following raw materials: polyacrylic acid aqueous solution, allochroic silica gel, silica sol and high-molecular water-absorbing resin; the dosage ratio of the polyacrylic acid aqueous solution, the allochroic silica gel, the silica sol and the high-molecular water-absorbing resin is 50-85:10-45:1-5:0-10 in parts by mass.
Optionally, the amount ratio of the polyacrylic acid aqueous solution, the allochroic silica gel, the silica sol and the high molecular water-absorbent resin used as the raw materials of the coating is 50-75:20-45:1-4:0-10 by mass.
Optionally, the raw materials of the coating are composed of polyacrylic acid aqueous solution, allochroic silica gel, silica sol and high-molecular water-absorbent resin.
In the gypsum-based self-leveling floor provided by the invention, the gypsum is selected from anhydrite (used after being excited by proper amount of cement and sulfate), natural gypsum clinker and desulfurized gypsum clinker with the whiteness of more than 90 and the iron ion content of less than 100 ppm;
in the gypsum-based self-leveling floor provided by the invention, the granularity of the gypsum is 74-178 mu m.
In the gypsum-based self-leveling terrace provided by the invention, the water reducing agent is selected from one or two of a melamine resin water reducing agent and a polycarboxylic acid water reducing agent.
In the gypsum-based self-leveling terrace provided by the invention, the melamine resin water reducing agent is sulfonated melamine formaldehyde resin;
in the gypsum-based self-leveling terrace provided by the invention, the polycarboxylic acid water reducing agent is selected from polycarboxylic acid ether polymers.
In the gypsum-based self-leveling terrace provided by the invention, the porous mineral material is selected from one or more of sepiolite, diatomite, zeolite, bentonite or kaolin; the fineness is 80-1000 meshes;
in the gypsum-based self-leveling floor provided by the invention, the latex powder is redispersible latex powder;
in the gypsum-based self-leveling floor provided by the invention, the water-retaining agent is a cellulose water-retaining agent and is selected from one or more of hydroxypropyl methyl cellulose, hydroxypropyl methyl cellulose ether, methyl cellulose, hydroxyethyl cellulose and hydroxymethyl cellulose.
In the gypsum-based self-leveling terrace provided by the invention, the viscosity of the water-retaining agent is 20000-plus 200000 mpa.s.
In the gypsum-based self-leveling terrace provided by the invention, the filler is selected from one or more of fly ash, quartz sand, silica fume and river sand;
in the gypsum-based self-leveling terrace provided by the invention, the granularity of the quartz sand is 70-90 meshes,
in the gypsum-based self-leveling terrace provided by the invention, the river sand granularity is selected from 40-70 meshes and 70-140 meshes;
in the gypsum-based self-leveling terrace provided by the invention, the silica fume fineness is less than 1um and accounts for more than 80 wt%, and the average particle size is 0.1-0.3 um;
in the gypsum-based self-leveling terrace provided by the invention, the fly ash is primary or secondary fly ash.
In the gypsum-based self-leveling floor provided by the invention, the phase change material is selected from one or more of paraffin microcapsules, silicon oxide wall material phase change materials and diatomite wall material phase change materials.
In the gypsum-based self-leveling terrace provided by the invention, the granularity of the allochroic silica gel is 200-800 meshes.
In the gypsum-based self-leveling terrace provided by the invention, the solid content of the polypropylene aqueous solution is 40-50%, and the PH value is 6-7;
in the gypsum-based self-leveling terrace provided by the invention, SiO in the silica sol2The mass percentage of the components is 29-42 percent;
in the gypsum-based self-leveling terrace provided by the invention, the high-molecular water-absorbing resin is selected from polyacrylic acid high-molecular water-absorbing resins.
In the gypsum-based self-leveling terrace provided by the invention, the thickness of the gypsum-based mortar is 3-10mm, and the thickness of the coating is 1-3 mm.
On the other hand, the invention also provides a preparation method of the gypsum-based self-leveling floor, which comprises the following steps:
(1) uniformly mixing gypsum, allochroic silica gel, a phase change material, a porous mineral material, a water reducing agent, latex powder, a water-retaining agent and a filler;
(2) testing the standard consistency extension degree of the mixture obtained in the step (1) to determine the water consumption of the standard consistency of the mixture, adding water into the mixture obtained in the step (1) to prepare slurry, and paving the slurry;
(3) uniformly mixing polyacrylic acid aqueous solution, allochroic silica gel, silica sol and high-molecular water-absorbent resin to prepare coating for the coating;
(4) and (3) drying the slurry obtained in the step (2), and coating a coating on the surface to obtain the gypsum-based mortar self-leveling floor.
In the preparation method of the gypsum-based self-leveling floor, the allochroic silica gel, the phase-change material and the gypsum in the step (1) are premixed, and the premixed amount of the gypsum is 10-40 wt% of the total amount of the gypsum; and then uniformly mixing the mixture obtained by premixing with other raw materials.
In the preparation process of the present application, the standard thickness spread of the building gypsum is determined according to GB/T17669.3-1999 Standard: the gypsum samples were measured twice in succession according to the following procedure. The inside of the cylinder of the consistometer and the glass plate are wiped clean, kept wet and vertically placed on the glass plate. The estimated water volume for the standard consistency was poured into a mixing bowl and a gypsum pattern of 300g was weighed into the water within 5 seconds. Stirring with a stirring rod for 30s to obtain uniform gypsum slurry, rapidly injecting into the consistometer cylinder while stirring, and scraping overflowed slurry with a scraper to make the slurry surface flush with the upper end surface of the cylinder. Starting from the time the plaster pattern comes into contact with water to 50s, the instrument lift button is actuated. After the cylinder is removed, the diameters of the test cakes into which the slurry is spread in two perpendicular directions are measured, and the arithmetic mean value of the diameters is calculated. The amount of water added is recorded at a slurry spreading diameter equal to (180 ± 5) mm and the gypsum processing equipment calculates the ratio of this amount of water added to the mass of the gypsum pattern, expressed as a percentage. The average of the two measurements was taken as the water usage for the standard consistency of the gypsum pattern to an accuracy of 1%.
The application provides a functional ready-mixed self-leveling floor material produced by using gypsum waste residues to replace base materials such as cement, resin coatings, alpha semi-hydrated gypsum, building gypsum and the like, which has the excellent characteristics of good fluidity, quick setting, high strength, small shrinkage, good alkali resistance, environmental friendliness, no pollution and the like, and opens up a new way for the high added value utilization of gypsum.
Simultaneously, contain porous mineral material and silica gel powder in the gypsum base self-leveling terrace mortar of this application, not only enlarged the adsorption efficiency of terrace material, had the indicative function to the humidity of room environment moreover, ground colour can change along with air humidity's change, helps suggestion people to adopt auxiliary assembly to regulate and control room humidity to letting people feel comfortable humidity environment.
Simultaneously, phase transition energy storage heat-retaining material has been added in the gypsum base self-leveling terrace material of this application. The phase change energy storage composite material is a thermal function composite material, and can store energy in the body in the form of phase change latent heat, so that the energy can be converted between different empty positions. Therefore, the storage and utilization of energy are realized by utilizing the latent heat of phase change of the phase change material, and the energy efficiency is improved and the renewable energy is developed. In addition, the phase-change energy storage heat storage material, the porous mineral material and the silica gel powder are matched for use, so that the temperature and the humidity of the environment are stabilized.
In addition, the mortar of gypsum base self-leveling terrace material preparation of this application is mainly used as surface course or floor heating system (spread on heating tubular product). Therefore, the gypsum-based self-leveling floor mortar with humidifying and temperature adjusting functions, which is developed by the application, can effectively save energy and improve the comfort level of indoor living environment.
The gypsum-based self-leveling floor material provided by the embodiment of the application or the gypsum-based self-leveling floor mortar prepared from the gypsum-based self-leveling floor material has the following advantages compared with the existing self-leveling floor mortar:
(1) the temperature and humidity environment of a room is improved, the temperature and humidity of indoor air are adjusted, and good breathing performance is achieved; (2) has an indicating function for the humidity of the environment. (3) The wear resistance of the ground is improved. (4) Has the functions of purifying air and adsorbing harmful gases such as formaldehyde, voc, svoc and the like. (5) Compared with cement-based self-leveling floor mortar, the mortar prepared by the method has small drying shrinkage or hardening shrinkage; (6) the heat preservation, heat insulation and sound insulation performance is good, and the building energy conservation is facilitated; (7) the environment is protected and no pollution is caused; (8) has certain elasticity, and the foot feels warm and comfortable. (9) The temperature control device has the temperature control function, can effectively reduce the fluctuation range of indoor temperature, and improves the comfort of human living environment.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification, claims, and drawings.
Drawings
The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
FIG. 1 is a humidity curve of examples and comparative examples.
FIG. 2 is a picture of a dried or sun-dried terrace prepared according to the formulation of example 1;
fig. 3 is a picture of a moisture-absorbed terrace prepared according to the formula of example 1;
Detailed Description
The invention will now be further described by way of the following examples, which are not intended to limit the scope of the invention in any way. It will be understood by those skilled in the art that equivalent substitutions and corresponding modifications of the technical features of the present invention can be made within the scope of the present invention.
The concrete embodiment of the application provides a gypsum-based self-leveling floor, which comprises gypsum-based mortar and a coating, wherein the coating is coated on the surface of the gypsum-based mortar;
in the embodiment of the invention, the gypsum-based mortar comprises the following raw materials: gypsum, allochroic silica gel, a phase change material, a porous mineral material, a water reducing agent, latex powder, a water-retaining agent and a filler; the dosage ratio of the gypsum, the allochroic silica gel, the phase-change material, the porous mineral material, the water reducing agent, the latex powder, the water-retaining agent and the filler is 100:1-15:5-20:0-5:0.25-1:0-4:0.02-0.12:35-65 by mass, and water is added according to the water consumption of the standard consistency to prepare the gypsum-based mortar;
optionally, the gypsum-based mortar is prepared by adding water into raw materials of gypsum, allochroic silicagel, a phase change material, a porous mineral material, a water reducing agent, latex powder, a water retaining agent and a filler according to the mass ratio of 100:1-10:5-10:0-4:0.3-0.8:1-3:0.05-0.1:45-60 in parts by mass and using water according to the water consumption of the standard consistency;
optionally, the raw materials of the gypsum-based mortar comprise gypsum, allochroic silica gel, a phase change material, a porous mineral material, a water reducing agent, latex powder, a water-retaining agent and a filler.
In an embodiment of the present invention, the raw materials of the coating include: polyacrylic acid aqueous solution, allochroic silica gel, silica sol and high-molecular water-absorbing resin; the dosage ratio of the polyacrylic acid aqueous solution, the allochroic silica gel, the silica sol and the high-molecular water-absorbing resin is 50-85:10-45:1-5:0-10 in parts by mass.
Optionally, the amount ratio of the polyacrylic acid aqueous solution, the allochroic silica gel, the silica sol and the high molecular water-absorbent resin used as the raw materials of the coating is 50-75:20-45:1-4:0-10 by mass.
Optionally, the raw materials of the coating are composed of polyacrylic acid aqueous solution, allochroic silica gel, silica sol and high-molecular water-absorbent resin.
In the embodiment of the invention, the gypsum is selected from anhydrite (used after being excited by proper amount of cement and sulfate), natural gypsum clinker and desulfurized gypsum clinker with the iron ion content of more than 90 ppm and the whiteness of less than 100 ppm; wherein the desulfurized gypsum is a gypsum waste residue resource utilization source, and is sourced from iron ridge power plants.
In the examples of the present invention, the gypsum had a particle size of 74 to 178 μm.
In the embodiment of the invention, the water reducing agent is selected from one or two of a melamine resin water reducing agent and a polycarboxylic acid water reducing agent.
In the embodiment of the invention, the melamine resin water reducing agent is sulfonated melamine formaldehyde resin,
in the embodiment of the invention, the water reducing agent of the melamine resin system is Basfu (China) GmbH
F10、
One or two of F15;
in the embodiment of the invention, the polycarboxylic acid water reducer is selected from polycarboxylic acid ether polymers;
in the embodiment of the present invention, the polycarboxylic acid water reducing agent is selected from Melflux5691F, 5581F, 2651F, 4930F, manufactured by BASF corporation.
In an embodiment of the invention, the porous mineral material is selected from one or more of sepiolite, diatomaceous earth, zeolite, bentonite or kaolin; the fineness is 80-1000 meshes;
in the embodiment of the invention, the latex powder is redispersible latex powder,
in the present embodiment, the latex powder is selected from Wacker chemical (China) Inc.,
5010N、
5011L and
5111L;
in the embodiment of the present invention, the water retaining agent is a cellulose water retaining agent, and is selected from one or more of hydroxypropyl methylcellulose, hydroxypropyl methylcellulose ether, methylcellulose, hydroxyethyl cellulose, and hydroxymethyl cellulose, and specifically selected from one or more of akksonobel CST324, akksonobel CST481, dow METHOCEL 342, bayer MKX40000PF01, and bayer MKX60000PF 15.
In the embodiment of the invention, the viscosity of the water-retaining agent is 20000-200000 mpa.s.
In an embodiment of the invention, the filler is selected from one or more of fly ash, quartz sand, silica fume and river sand;
in the embodiment of the invention, the granularity of the quartz sand is 70-90 meshes,
in the embodiment of the invention, the river sand granularity is 40-70 meshes and 70-140 meshes;
in the embodiment of the invention, the silica fume fineness is less than 1um and accounts for more than 80 wt%, and the average grain diameter is 0.1-0.3 um;
in an embodiment of the invention, the fly ash is first-grade or second-grade fly ash.
In an embodiment of the present invention, the phase change material is selected from one or more of paraffin microcapsule, silicon oxide wall material phase change material and diatomite wall material phase change material.
In the embodiment of the invention, the granularity of the color-changing silica gel is 200-800 meshes.
In the embodiment of the invention, the solid content of the polypropylene aqueous solution is 40-50%; SiO in the silica sol2The mass percentage of the components is 29-42 percent;
in the embodiment of the present invention, the polymeric water absorbent resin is selected from polyacrylic acid-based polymeric water absorbent resins.
In the embodiment of the invention, the thickness of the gypsum-based mortar is 3-10mm, and the thickness of the coating is 1-3 mm.
In the embodiment of the invention, the allochroic silica gel is blue silica gel or orange silica gel, and is purchased from Qingdao silicon-based fine chemical industry Co. Can be particles of any size, and is prepared by grinding to 200-800 meshes.
In the embodiment of the invention, the preparation method of the phase-change energy-storage heat storage material is disclosed in the following documents: preparation and characterization of Paraffin microcapsule phase change materials [ J ]. Huang Xiao hong, Ji Pu et al, powder metallurgy technology, 2015, 33 (5).
In embodiments of the present invention, the latex powder may be a redispersible latex powder, such as those manufactured by wacker, fortita corporation.
In the examples of the invention, the standard thickness spread of construction gypsum was determined according to GB/T17669.3-1999 Standard: the gypsum samples were measured twice in succession according to the following procedure. The inside of the cylinder of the consistometer and the glass plate are wiped clean, kept wet and vertically placed on the glass plate. The estimated water volume for the standard consistency was poured into a mixing bowl and a gypsum pattern of 300g was weighed into the water within 5 seconds. Stirring with a stirring rod for 30s to obtain uniform gypsum slurry, rapidly injecting into the consistometer cylinder while stirring, and scraping overflowed slurry with a scraper to make the slurry surface flush with the upper end surface of the cylinder. Starting from the time the plaster pattern comes into contact with water to 50s, the instrument lift button is actuated. After the cylinder is removed, the diameters of the test cakes into which the slurry is spread in two perpendicular directions are measured, and the arithmetic mean value of the diameters is calculated. The amount of water added is recorded at a slurry spreading diameter equal to (180 ± 5) mm and the gypsum processing equipment calculates the ratio of this amount of water added to the mass of the gypsum pattern, expressed as a percentage. The average of the two measurements was taken as the water usage for the standard consistency of the gypsum pattern to an accuracy of 1%.
The gypsum-based self-leveling floor slurry provided by the embodiment of the application is a novel ground leveling material, is a self-leveling floor slurry which is prepared by taking gypsum as a main cementing material and adding a humidity regulating material, a humidity regulating indicator, a phase change material, various additives, fillers and the like, and has the function of utilizing the natural flowing property of the slurry per se to flow and level on a concrete base to form a smooth ground leveling layer. And after the mortar is dried, coating a coating on the mortar.
In the examples of the present invention, the reagents used were all commercially available; the same sources of reagents are the same. Zeolite was purchased from Beijing national institute of technology, Inc.; the redispersible latex powder is available from Wacker chemical (china) gmbh,
5011L、
5010N。
example 1
The gypsum-based self-leveling floor material of the embodiment is prepared as follows (in parts by mass):
step 1: taking paraffin microcapsule phase change material. The preparation method is shown in the literature: preparation and characterization of Paraffin microcapsule phase change materials [ J ]. Huang Xiao hong, Ji Pu et al, powder metallurgy technology, 2015, 33 (5). And 5 parts of phase change energy storage heat storage material is weighed for later use.
Step 2: uniformly mixing 5 parts of allochroic silica gel sieved by a 200-mesh sieve, 20 parts of desulfurized gypsum clinker and 5 parts of paraffin microcapsule phase change material obtained in the step (1); obtaining premixed powder;
and step 3: mixing the premixed powder obtained in the step 2 with 80 parts of desulfurized gypsum clinker, 2 parts of 200-mesh zeolite and 0.3 part of
P29 polycarboxylic acid high-performance water reducing agent, 1.5 parts of 5010N redispersible latex powder, 0.04 part of Dow METHOCEL 342 water-retaining agent and 45 parts of filler (quartz sand, 40-70 meshes, 20 parts and 70-140 meshes, 25 parts) are mixed uniformly.
And 4, step 4: and (4) testing the water consumption of the mixture with the standard consistency obtained in the step (3), preparing slurry according to the water consumption of the standard consistency, and paving the slurry to the thickness of 5 mm.
And 5: weighing 5 parts of polyacrylic acid solution (pH of polyacrylic acid emulsion is 6-7, solid content is 40-50%), weighing 4 parts of allochroic silica gel which is sieved by a 200-mesh sieve, weighing 0.1 part of high-molecular water-absorbing resin (polyacrylic acid series high-molecular water-absorbing resin, LN-100 expansion type, purchased from Longquan chemical plant of Yanggu county), weighing 0.25 part of silica sol solution with the concentration of 29 wt% (purchased from Hibiscus rosa-sinensis refining processing Co., Ltd.), uniformly mixing, brushing on the dried self-leveling mortar prepared in the step 4, and brushing the thickness of the self-leveling mortar with the thickness of 3 mm.
Example 2
The same method as that of example 1 for preparing the gypsum-based self-leveling floor material was used, except that: the coating in the step 5 has different formulas, and the formula of the coating comprises the following components in parts by mass: weighing 7.5 parts of polyacrylic acid solution (pH of polyacrylic acid emulsion is 6-7, solid content is 40-50%), weighing 2 parts of allochroic silica gel which is sieved by a 200-mesh sieve, weighing 0.1 part of silica sol solution (purchased from Hibiscus rosa-sinensis refining Co., Ltd.) with concentration of 29 wt%, uniformly mixing, and brushing the mixture on the dried self-leveling mortar prepared in the step 4 to obtain a coating thickness of 3 mm.
Example 3
The same method as that of example 1 for preparing the gypsum-based self-leveling floor material was used, except that: the coating in the step 5 has different formulas, and the formula of the coating comprises the following components in parts by mass: weighing 5 parts of polyacrylic acid solution (pH of polyacrylic acid emulsion is 6-7, solid content is 40-50%), weighing 2 parts of allochroic silica gel which is sieved by a 200-mesh sieve, weighing 0.15 part of high-molecular water-absorbing resin (polyacrylic acid series high-molecular water-absorbing resin, LN-100 expansion type, purchased from Longquan chemical plant of Yanggu county), weighing 0.25 part of silica sol solution (purchased from Hibiscus rosa-sinensis refining processing Co., Ltd.) with the concentration of 29 wt%, uniformly mixing, brushing on the dried self-leveling mortar prepared in the step 4, and brushing the thickness of the self-leveling mortar with the thickness of 3 mm.
Comparative example
The preparation method of the gypsum-based self-leveling floor material is the same as that of example 1, except that no coating operation is performed.
The gypsum-based self-leveling mortars produced in the examples and comparative examples were subjected to the following performance tests:
fluidity and coagulation time measurement: the setting time was determined with reference to Gypsum-based self-leveling mortar (JC/T1023-2007).
Test piece molding and strength measurement: pouring the slurry into a mould with the size of 40mm multiplied by 160mm, demoulding within 1h of final setting to prepare a test piece, and placing the test piece in an electric heating constant temperature blast drying oven to dry the test piece to constant weight; the tensile bonding strength refers to cement-based self-leveling mortar for ground (JC/T985-2005), and concrete is selected as a base material.
Table 1 examples and comparative examples gypsum based self-leveling mortar performance testing
The test results are: the terrace material has good mechanical property, improved softening coefficient and improved heat-conducting property; according to the figure 1, the moisture absorption performance of the terrace material is also found to be good.
The gypsum-based terrace (20cm by 20cm) is placed in a constant temperature and humidity box, and a drier method (using K) is adopted according to the standard GB/T20312-2006 determination of moisture absorption performance of damp heat performance of building materials and products2SO4Saturated salt solution), it can be found that the moisture absorption performance of the gypsum-based terrace of the invention is far greater than that of a common gypsum-based terrace. The test results are shown in Table 2.
Table 2: statistics of moisture absorption and desorption performances of the gypsum terraces prepared in examples and comparative examples
FIG. 1 is a humidity curve of examples and comparative examples; the concrete test method is that mortar is paved on the ground in a space of 1m x 1m, each surface of the closed space is provided with holes with the diameter of 5mm and communicated with the outside, and the floor material disclosed by the invention can well stabilize indoor humidity, avoid overhigh or overlow change of the indoor humidity and is beneficial to improving the comfort level of human living environment through the graph 1.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention.
Claims (16)
1. The gypsum-based self-leveling floor comprises gypsum-based mortar and a coating, wherein the coating is coated on the surface of the gypsum-based mortar;
the gypsum-based mortar comprises the following raw materials: gypsum, allochroic silica gel, a phase change material, a porous mineral material, a water reducing agent, latex powder, a water-retaining agent and a filler; the dosage ratio of the gypsum, the allochroic silica gel, the phase-change material, the porous mineral material, the water reducing agent, the latex powder, the water-retaining agent and the filler is 100:1-15:5-20:0-5:0.25-1:0-4:0.02-0.12:35-65 by mass, and water is added according to the water consumption of the standard consistency to prepare the gypsum-based mortar;
the coating comprises the following raw materials: polyacrylic acid aqueous solution, allochroic silica gel, silica sol and high-molecular water-absorbing resin; the dosage ratio of the polyacrylic acid aqueous solution, the allochroic silica gel, the silica sol and the high-molecular water-absorbing resin is 50-85:10-45:1-5:0-10 in parts by mass;
the thickness of the gypsum-based mortar is 3-10mm, and the thickness of the coating is 1-3 mm.
2. The gypsum-based self-leveling floor according to claim 1, wherein the gypsum-based mortar is prepared by adding water to raw materials of gypsum, allochroic silica gel, a phase change material, a porous mineral material, a water reducing agent, latex powder, a water retaining agent and a filler in a ratio of 100:1-10:5-10:0-4:0.3-0.8:1-3:0.05-0.1:45-60 by mass parts;
the coating comprises the following raw materials of polyacrylic acid aqueous solution, allochroic silica gel, silica sol and high-molecular water-absorbent resin in a ratio of 50-75:20-45:1-4:0-10 by mass.
3. The gypsum-based self-leveling floor according to claim 1 or 2, wherein the gypsum is selected from the group consisting of anhydrite, natural gypsum clinker, and desulfurized gypsum clinker.
4. The gypsum-based self-leveling floor according to claim 3, wherein the gypsum has a particle size of 74-178 μm.
5. The gypsum-based self-leveling floor according to claim 1 or 2, wherein the water reducing agent is selected from one or two of a melamine resin-based water reducing agent and a polycarboxylic acid-based water reducing agent.
6. The gypsum-based self-leveling floor according to claim 5, wherein the melamine resin based water reducer is sulfonated melamine formaldehyde resin;
the polycarboxylic acid water reducing agent is selected from polycarboxylic acid ether polymers.
7. The gypsum-based self-leveling floor according to claim 1 or 2, wherein the porous mineral material is selected from one or more of sepiolite, diatomaceous earth, zeolite, bentonite, or kaolin;
the latex powder is redispersible latex powder;
the water retaining agent is cellulose water retaining agent selected from one or more of hydroxypropyl methylcellulose, hydroxypropyl methylcellulose ether, methylcellulose, hydroxyethyl cellulose and hydroxymethyl cellulose.
8. The gypsum-based self-leveling floor according to claim 7, wherein the fineness of the porous mineral material is 80-1000 mesh.
9. The gypsum-based self-leveling floor as claimed in claim 7, wherein the viscosity of the water retention agent is 20000-.
10. The gypsum-based self-leveling floor according to claim 1 or 2, wherein the filler is selected from one or more of fly ash, quartz sand, silica fume and river sand.
11. The gypsum-based self-leveling floor of claim 10, wherein the fly ash is a primary or secondary fly ash; the quartz sand has a granularity of 70-90 meshes, the river sand has a granularity of 40-70 meshes and 70-140 meshes, and the silica fume with a fineness less than 1 μm accounts for 80%wt% of the total amount of the components and having an average particle diameter of 0.1 to 0.3. mu.m.
12. The gypsum-based self-leveling floor according to claim 1 or 2, wherein the phase change material is selected from one or more of paraffin microcapsules, silica wall material phase change materials and diatomite wall material phase change materials.
13. The gypsum-based self-leveling floor as claimed in claim 1 or 2, wherein the particle size of the color-changing silica gel is 200-800 meshes.
14. The gypsum-based self-leveling floor according to claim 1 or 2, wherein the aqueous polyacrylic acid solution has a solid content of 40-50% and a pH of 6-7;
SiO in the silica sol2Is 29 to 42 percentwt%；
The high-molecular water-absorbing resin is selected from polyacrylic acid high-molecular water-absorbing resin.
15. A method of making a gypsum-based self-leveling floor as claimed in any one of claims 1 to 14, comprising the steps of:
(1) uniformly mixing gypsum, allochroic silica gel, a phase change material, a porous mineral material, a water reducing agent, latex powder, a water-retaining agent and a filler;
(2) testing the standard consistency extension degree of the mixture obtained in the step (1) to determine the water consumption of the standard consistency of the mixture, adding water into the mixture obtained in the step (1) to prepare slurry, and paving the slurry;
(3) uniformly mixing polyacrylic acid aqueous solution, allochroic silica gel, silica sol and high-molecular water-absorbent resin to prepare coating for the coating;
(4) and (3) drying the slurry obtained in the step (2), and coating a coating on the surface to obtain the gypsum-based mortar self-leveling floor.
16. The method for preparing the gypsum-based self-leveling floor according to claim 15, wherein the allochroic silica gel, the phase-change material and the gypsum in the step (1) are premixed, and the premixed amount of the gypsum is 10-40 of the total amount of the gypsumwtPercent; and then uniformly mixing the mixture obtained by premixing with other raw materials.
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| CN113213870A (en) * | 2021-04-28 | 2021-08-06 | 浙申环保材料(宁波)有限公司 | Better-performance light plastering gypsum |
| CN113651586B (en) * | 2021-09-26 | 2022-10-21 | 临海市忠信新型建材有限公司 | Bottom layer plastering gypsum and preparation method thereof |
| CN114014624A (en) * | 2021-12-01 | 2022-02-08 | 富思众诚(北京)科技有限公司 | Method for proportioning gypsum-based self-leveling mortar special for ground heating backfill |
| CN114396149A (en) * | 2022-01-24 | 2022-04-26 | 浙江巍华新型建材有限公司 | Anti-cracking wear-resistant inorganic concrete terrace and construction process thereof |
| CN114477869A (en) * | 2022-01-27 | 2022-05-13 | 武汉盛大长青建材有限公司 | Thick-layer leveling material and construction method thereof |
| CN114482462A (en) * | 2022-02-25 | 2022-05-13 | 上海奉贤建设发展（集团）有限公司 | Construction method of heavy-load-resistant acid-proof terrace |
| CN114538878A (en) * | 2022-03-31 | 2022-05-27 | 兰州理工大学 | Preparation method of high-strength gypsum-based wall |
| CN114753589A (en) * | 2022-04-27 | 2022-07-15 | 广东亿固壁安粘贴技术有限公司 | Novel sound-insulation leveling large-plate ceramic tile adhesive paving method |
| CN115093187B (en) * | 2022-06-20 | 2023-02-14 | 临海市忠信新型建材有限公司 | Preparation and construction process of self-leveling mortar capable of being used for ground filling and leveling |
| CN115572141A (en) * | 2022-10-24 | 2023-01-06 | 广东复特新型材料科技有限公司 | Gypsum self-leveling mortar |
| CN116144265B (en) * | 2023-02-08 | 2023-12-22 | 威海真都化工有限公司 | Novel high-strength wear-resistant anti-scaling floor coating, preparation method and application thereof |
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