CN114573314B - Phosphogypsum-based sound insulation self-leveling mortar and application thereof - Google Patents
Phosphogypsum-based sound insulation self-leveling mortar and application thereof Download PDFInfo
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- CN114573314B CN114573314B CN202110633916.0A CN202110633916A CN114573314B CN 114573314 B CN114573314 B CN 114573314B CN 202110633916 A CN202110633916 A CN 202110633916A CN 114573314 B CN114573314 B CN 114573314B
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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
- C04B28/143—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 phosphogypsum
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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
- C04B2111/52—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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- 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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- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the field of mortar, in particular to phosphogypsum-based sound insulation self-leveling mortar and application thereof. The phosphogypsum-based sound insulation self-leveling mortar is modified by adding sound insulation materials such as rubber particles, and is beneficial to guaranteeing the construction performance and the construction effect of the gypsum-based self-leveling, and meanwhile, the sound insulation performance of the material is remarkably improved. According to the invention, phosphogypsum and waste rubber are used as main raw materials, so that the recycling of solid waste resources is realized, and compared with the traditional sound insulation leveling mortar, the sound insulation leveling mortar has better construction performance and sound insulation performance, is beneficial to saving resources and production cost, and can be used for building materials, especially for sound insulation between floors.
Description
Technical Field
The invention relates to the field of mortar, in particular to phosphogypsum-based sound insulation self-leveling mortar and application thereof.
Background
The floor sound insulation is divided into air sound insulation and impact sound insulation, and for the existing 120mm cast-in-place concrete floor, the air sound insulation performance basically meets the requirements of relevant standards, but the impact sound insulation performance is relatively poor. In order to improve the impact sound insulation quantity between floors, a floating structure is adopted at present, namely, an elastic cushion layer is paved on a concrete floor slab, concrete with the thickness of about 40mm is poured on the cushion layer, the technical scheme can improve the impact sound insulation quantity of the floor slab, but the cross operation is more in the construction process, the elastic layer is easy to break to form a sound bridge, and the concrete layer on the elastic cushion layer is easy to crack to influence the actual effect.
The gypsum-based self-leveling mortar is one of mortar products which are developed faster in recent years, has the advantages of convenient construction, time and labor saving, high flatness, difficult cracking and the like, and is widely applied to indoor leveling engineering of buildings such as houses, office buildings, markets and the like. The self-leveling material prepared from the industrial byproduct gypsum such as phosphogypsum, desulfurized gypsum and the like promotes the recycling of industrial solid waste, and has good economic and social benefits. The gypsum material has better heat preservation and sound insulation performance compared with cement, but the sound insulation performance is still weaker.
China is one of countries with the largest yield of waste rubber tires, and the yield of waste rubber in 2020 China is over 600 ten thousand tons. If the waste rubber is not utilized, the problems of occupying land resources and endangering ecological environment exist. Rubber particles obtained by crushing waste tires have good impact sound improving performance, and the sound insulation performance of products can be effectively improved by adding the rubber particles into mortar, so that the rubber particles are one of important ways of large-scale utilization of the rubber particles. On the basis, a proper amount of rubber particles are added into the gypsum-based self-leveling mortar to further improve the sound insulation performance of the gypsum-based self-leveling mortar, so that the product has an efficient and convenient construction mode and good impact sound insulation performance, and has huge development potential.
In CN201811045185.2, an industrial byproduct gypsum waste rubber particle wall material and a preparation method thereof are disclosed, and rubber particle composite gypsum is used for improving the sound insulation performance of the wall material, but cannot be applied to sound insulation between floors. In Chinese patent 201710226715.2, an phosphogypsum-based self-leveling material is disclosed, wherein modified rubber particles with 50-70 meshes are used for modifying self-leveling, but the ultra-fine rubber particles can only be used for relieving expansion caused by ettringite formation in self-leveling, and the improvement on sound insulation performance is small. In addition, several patents disclose a preparation method of the rubber particle modified sound insulation mortar, but most of the traditional leveling mortar does not have convenient construction performance and good construction effect of the self-leveling mortar. And because the rubber particles are light in weight, the rubber particles are extremely easy to float upwards in self-leveling slurry, have obvious influence on the fluidity and the setting time of self-leveling, and have certain application difficulty.
Disclosure of Invention
In order to solve the problems, the first aspect of the invention provides phosphogypsum-based sound insulation self-leveling mortar, which comprises, by weight, 30-140 parts of phosphogypsum-based gypsum, 5-20 parts of sound insulation materials and 0.2-1 part of cement, wherein the phosphogypsum-based gypsum comprises alpha-type high-strength gypsum and building gypsum in a weight ratio of (30-80): (0-60).
As a preferable technical scheme of the invention, the sound insulation material is selected from one or more of glass beads, rubber particles and bentonite.
As a preferable technical scheme of the invention, the mesh number of the sound insulation material is 20-40 mesh.
As a preferable technical scheme of the invention, the mortar is prepared from the following raw materials, by weight, 0.05-0.1 part of polysaccharide thickener and 0.1-0.2 part of plant fiber.
As a preferable technical scheme of the invention, the polysaccharide thickener is one or more selected from cellulose thickener, starch thickener and modified starch thickener.
As a preferable embodiment of the present invention, the dynamic viscosity of the polysaccharide thickener at 25 ℃ is 400 to 20000 mPa.s.
As a preferable technical scheme of the invention, the length of the plant fiber is 200-600 mu m.
As a preferable technical scheme, the mortar is prepared from the following raw materials in parts by weight, and further comprises 0.2-0.55 part of polymer powder, wherein the polymer powder is one or more selected from polyvinyl alcohol, ethylene-vinyl acetate copolymer rubber powder, ethylene-vinyl chloride-vinyl laurate copolymer rubber powder, vinyl acetate-ethylene-vinyl versatate copolymer rubber powder and vinyl acetate-acrylic ester-vinyl versatate copolymer rubber powder.
As a preferable technical scheme, the preparation raw materials of the mortar also comprise an auxiliary agent, wherein the auxiliary agent comprises one or more of retarder, water reducer, defoamer and stabilizer.
The invention provides an application of the phosphogypsum-based sound insulation self-leveling mortar in building materials.
Compared with the prior art, the invention has the following beneficial effects:
(1) The phosphogypsum-based sound insulation self-leveling mortar is modified by adding the sound insulation materials such as rubber particles, so that the construction performance and the construction effect of the phosphogypsum-based self-leveling mortar are guaranteed, and the sound insulation performance of the material is remarkably improved.
(2) According to the invention, phosphogypsum and waste rubber are used as main raw materials, so that the recycling of solid waste resources is realized, and compared with the traditional sound insulation leveling mortar, the sound insulation leveling mortar has better construction performance and sound insulation performance, is beneficial to saving resources and production cost, and can be used for building materials, especially for sound insulation between floors.
(3) The inventor finds that rubber particles with proper mesh number can be used as a sound insulation material for improving the sound insulation effect of a mortar material, but rubber particles are easy to float up due to the low density of the rubber, so that the fluidity in the construction process is influenced, and the shrinkage rate, the sound insulation capacity and the mechanical strength of subsequent products are influenced.
(4) The inventor finds that the hydrophobic structures such as rubber particles, fibers and the like influence the mixing with gypsum in the process of mixing the subsequent mortar and water for preparing the building material, and the invention finds that when polymer powder such as polyvinyl alcohol, ethylene-vinyl acetate copolymer rubber powder and the like is added, the combination and dispersion performance of the gypsum, the rubber particles and the like are improved, the improvement of the workability and the construction effect is promoted, and the high-strength and sound-insulation building material is obtained.
Detailed Description
The contents of the present invention can be more easily understood by referring to the following detailed description of preferred embodiments of the present invention and examples included. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, definitions, will control.
The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprising," "including," "having," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, step, method, article, or apparatus.
The conjunction "consisting of …" excludes any unspecified element, step or component. If used in a claim, such phrase will cause the claim to be closed, such that it does not include materials other than those described, except for conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the claim body, rather than immediately following the subject, it is limited to only the elements described in that clause; other elements are not excluded from the stated claims as a whole.
When an equivalent, concentration, or other value or parameter is expressed as a range, preferred range, or a range bounded by a list of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when ranges of "1 to 5" are disclosed, the described ranges should be construed to include ranges of "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a numerical range is described herein, unless otherwise indicated, the range is intended to include its endpoints and all integers and fractions within the range.
The singular forms include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or event may or may not occur, and that the description includes both cases where the event occurs and cases where the event does not.
Approximating language, in the specification and claims, may be applied to modify an amount that would not limit the invention to the specific amount, but would include an acceptable portion that would be close to the amount without resulting in a change in the basic function involved. Accordingly, the modification of a numerical value with "about", "about" or the like means that the present invention is not limited to the precise numerical value. In some examples, the approximating language may correspond to the precision of an instrument for measuring the value. In the present specification and claims, the range limitations may be combined and/or interchanged, such ranges including all the sub-ranges contained therein if not expressly stated.
Furthermore, the indefinite articles "a" and "an" preceding an element or component of the invention are not limited to the requirements of the number of elements or components (i.e. the number of occurrences). Thus, the use of "a" or "an" should be interpreted as including one or at least one, and the singular reference of an element or component also includes the plural reference unless the amount is obvious to the singular reference.
The present invention is illustrated by the following specific embodiments, but is not limited to the specific examples given below.
The invention provides phosphogypsum-based sound insulation self-leveling mortar, which comprises, by weight, 30-140 parts of phosphogypsum-based gypsum, 5-20 parts of sound insulation material and 0.2-1 part of cement.
Phosphogypsum-based gypsum
In one embodiment, the phosphogypsum-based gypsum of the invention comprises alpha-type high-strength gypsum and building gypsum in a weight ratio of (30-80): (0 to 60), there may be mentioned, for example, 30: 60. 40: 50. 50: 40. 60: 30. 70: 20. 80:0.
the alpha-type high-strength gypsum is prepared by taking water-washed phosphogypsum as a raw material and carrying out autoclaved crystal transformation, the initial setting time is 20-40 min, the strength grade meets the requirements in JC/T2038-2010 alpha-type high-strength gypsum, the 2h flexural strength of the alpha-type high-strength gypsum is more than or equal to 3.5MPa, the drying compressive strength is more than or equal to 25MPa, preferably, the 2h flexural strength is more than or equal to 4MPa, and the drying compressive strength is more than or equal to 30MPa.
The building gypsum is prepared from water-washed phosphogypsum serving as a raw material through a two-step method of drying and calcining, meets the regulations in GB/T9776-2008 building gypsum, and preferably, the building gypsum meets the grade requirements of 2.0 and above in GB/T9776-2008.
Sound insulation material
In one embodiment, the sound insulation material is selected from one or more of glass beads, rubber particles and bentonite. Rubber particles are preferred. The rubber particles are rubber product powder obtained by processing waste tires, and the inventor finds that the sound insulation performance of the self-leveling mortar can be remarkably improved by adding the rubber particles into the mortar provided by the invention. Preferably, the mesh number of the sound insulating material of the present invention is 20 to 40 mesh, and examples thereof include 20 mesh, 22 mesh, 25 mesh, 28 mesh, 30 mesh, 32 mesh, 35 mesh, 38 mesh and 40 mesh. The mesh number is the number of pores per inch.
Cement and its preparation method
The inventor finds that cement can react with gypsum in the hydration process to generate ettringite and hydrated calcium silicate gel, plays a role of a skeleton in a hardened body, reduces the porosity of the hardened body of the gypsum, and enhances the self-leveling water resistance. In addition, the pH value of the system can be adjusted in the self-leveling process of the cement, so that the use effect of partial additives is enhanced. The aluminate cement with high early strength has good use effect, and the mixing amount is not too large, otherwise, the hydration hardening process of the gypsum is greatly influenced, and the formation of the later strength is not facilitated. The cement is not particularly limited in the present invention, and silicate cement, aluminate cement (also called high alumina cement, alumina cement), sulphoaluminate cement, alkali slag cement, and the like can be cited.
In one embodiment, the mortar of the invention is prepared from the following raw materials, by weight, 0.05-0.1 part of polysaccharide thickener and 0.1-0.2 part of plant fiber.
Polysaccharide thickener
In one embodiment, the polysaccharide thickener of the present invention is selected from one or more of a cellulose thickener, a starch thickener, a modified starch thickener. Cellulose thickeners are preferred. Examples of cellulose thickeners include, but are not limited to, methyl cellulose, hydroxypropyl methyl cellulose, cyanoethyl cellulose, benzyl cyanoethyl cellulose, carboxymethyl hydroxyethyl cellulose, phenyl cellulose.
Preferably, the dynamic viscosity of the polysaccharide thickener according to the present invention is 400 to 20000 mPas, preferably 400 to 8000 mPas, preferably 2000 to 8000 mPas, more preferably 4000 to 8000 mPas, more preferably 5000 to 7000 mPas at 25 ℃. Dynamic viscosity is the ratio of stress to strain rate.
Plant fiber
The plant fiber is filiform or floccule generated by combining cellulose and various nutrient substances, has the functions of supporting, connecting, wrapping, filling and the like for plants, can be prepared from beech, fir and other woods or corn, rice straw, cotton stalk and other straws serving as raw materials, is subjected to acid washing neutralization, and then is crushed, bleached, rolled and screened to obtain the additive with different lengths and fineness, belongs to natural fibers, is different from cellulose thickener, and is insoluble in water; in one embodiment, the plant fibers of the present invention are wood fibers and/or straw fibers.
Preferably, the plant fiber of the present invention has a length of 200 to 600. Mu.m, and examples thereof include 200. Mu.m, 250. Mu.m, 300. Mu.m, 350. Mu.m, 400. Mu.m, 450. Mu.m, 500. Mu.m, and 600. Mu.m.
The inventor finds that by adding plant fiber and thickener, the viscosity of the slurry is properly improved, excellent water retention performance is provided, the slurry is not easy to crack due to too fast water loss, and meanwhile, the rubber is prevented from floating in the self-leveling slurry to form a unique three-dimensional network structure, so that the rubber particles are ensured to be uniformly dispersed in the self-leveling slurry.
In one embodiment, the mortar of the invention is prepared from the following raw materials in parts by weight, and further comprises 0.2-0.55 part of polymer powder.
Polymer powder
In one embodiment, the polymer powder is selected from one or more of polyvinyl alcohol, ethylene-vinyl acetate copolymer powder, ethylene-vinyl chloride-vinyl laurate copolymer powder, vinyl acetate-ethylene-vinyl versatate copolymer powder and vinyl acetate-acrylic ester-vinyl versatate copolymer powder.
Preferably, the polymer powder of the invention comprises at least one of ethylene-vinyl acetate copolymer rubber powder, ethylene-vinyl chloride-vinyl laurate copolymer rubber powder, vinyl acetate-ethylene-vinyl versatate copolymer rubber powder and vinyl acetate-acrylic ester-vinyl versatate copolymer rubber powder, and polyvinyl alcohol, wherein the weight ratio of the polyvinyl alcohol to the vinyl acetate-vinyl laurate copolymer rubber powder is (0.2-0.5): (0 to 0.05).
The polyvinyl alcohol used in the invention is cold water instant polyvinyl alcohol, and is easy to disperse in cold water to form capillary colloid. In one embodiment, the polyvinyl alcohol of the invention has a degree of polymerization of 1100 to 1700. The degree of polymerization is the average value of the number of repeating units contained in the macromolecular chain of the polymer.
The inventor finds that by using polymer powder such as rubber powder, polyvinyl alcohol and the like, the mortar generates a continuous film after meeting water, forms an interpenetrating polymer network structure, plays a role in cementing, and improves the self-leveling impermeability and water resistance. In addition, the inventor finds that the polyvinyl alcohol is a water-soluble film forming substance, is quickly dissolved in cold water, has high viscosity, is favorable for bonding gypsum mortar, can partially replace rubber powder, but cannot completely replace the rubber powder, and needs to control the dosage of the polyvinyl alcohol to promote the improvement of the bonding degree of gypsum and rubber particles.
In one embodiment, the mortar of the invention is prepared from the raw materials further comprising an auxiliary agent.
Auxiliary agent
In one embodiment, the auxiliary agent comprises one or more of retarder, water reducer, defoamer and stabilizer.
Gypsum has the characteristic of quick setting and early strength as a cementing material, and enough operation time is needed in self-leveling construction so that the slurry can be fully and uniformly paved on a base layer, so that a proper amount of retarder is needed to be added to prolong the opening time of self-leveling. Examples of retarders include, but are not limited to, protein-based retarders or polymer-based retarders, such as plant protein-based retarders, animal protein-based retarders. In one embodiment, the retarder of the invention is 0 to 0.3 parts by weight of the mortar.
The water reducing agent is an additive for reducing the water consumption. Examples of water reducing agents include, but are not limited to, melamine water reducing agents, sodium naphthalene sulfonate formaldehyde condensates, polycarboxylate water reducing agents, FDN water reducing agents. In one embodiment, the water reducer of the invention is 0.1 to 0.4 parts by weight of the mortar.
The defoamer has the function of reducing the surface tension of the material, thereby inhibiting the use of the water reducing agent and the generation of bubbles by stirring. Examples of defoamers include, but are not limited to, powder defoamers composed of hydrocarbons, polyethylene glycols, and amorphous silica, mineral oils, silicones. In one embodiment, the defoamer of the present invention is present in the mortar in an amount of 0.05 to 0.1 parts by weight.
To further increase the suspension stability of the self-leveling slurry, stabilizers may be added, as examples of stabilizers, including but not limited to agar, carob, pectin, polyvinyl acetal, WD-230 of the dragon lake technology. In one embodiment, the stabilizer of the present invention is present in the mortar in an amount of 0.1 to 0.3 parts by weight.
The second aspect of the invention provides an application of phosphogypsum-based sound insulation self-leveling mortar in building materials.
Examples
The present invention will be specifically described below by way of examples. It is noted herein that the following examples are given solely for the purpose of further illustration and are not to be construed as limitations on the scope of the invention, as will be apparent to those skilled in the art in light of the foregoing disclosure. Examples 1 to 3 provide mortars, which are all commercially available, were prepared by adding water to the obtained mortars according to a water cement ratio of 0.48, stirring the mixture uniformly to prepare a self-leveling slurry, performing construction, and measuring the fluidity loss, initial setting time, final setting time, 1d flexural strength, 1d compressive strength, dry flexural strength of 3.2MPa, dry compressive strength, tensile bonding strength and shrinkage, and impact sound improvement amount according to JC/T1023-2007 "gypsum-based self-leveling mortars", building sound insulation evaluation standards ".
Example 1
The invention provides phosphogypsum-based sound insulation self-leveling mortar, which comprises, by weight, 36 parts of alpha-type high-strength gypsum, 55 parts of building gypsum powder, 15 parts of rubber particles, 0.4 part of cement, 0.03 part of retarder, 0.32 part of water reducer, 0.05 part of thickener, 0.05 part of defoamer, 0.40 part of rubber powder, 0.03 part of polyvinyl alcohol, 0.12 part of wood fiber and 0.15 part of stabilizer.
The alpha-type high-strength gypsum is purchased from Vat Fu chemical engineering Co., ltd, and accords with the grade alpha 30 of JC/T2038-2010 alpha-type high-strength gypsum.
The building gypsum meets the grade of 3.0 in GB/T9776-2008.
The mesh number of the rubber particles is 30 mesh.
The cement is aluminate cement.
The retarder is a vegetable protein retarder 200P of Swiss ceticarb.
The water reducer is Swiss Sikapolycarboxylic acid high-efficiency water reducer 540P.
The thickener is hydroxypropyl methyl cellulose ether, and the viscosity of the thickener is 6000 Pa.s at 25 ℃.
The defoamer is a powder defoamer P803 composed of hydrocarbon, polyethylene glycol and amorphous silicon dioxide, and is produced by Ming Ling chemical industry in Germany.
The rubber powder is ethylene-vinyl acetate copolymer rubber powder.
The polyvinyl alcohol is cold water instant polyvinyl alcohol powder, and the polymerization degree is 1700.
The length of the wood fiber is 4000 μm.
The stabilizer is WD-230 purchased from Dragon lake technology.
The properties of the obtained slurry were: 30min of fluidity loss 0mm, initial setting time 95min, final setting time 110min,1d flexural strength 1.5Mpa,1d compressive strength 3.8Mpa, dry flexural strength 3.2Mpa, dry compressive strength 8.6Mpa, tensile bonding strength 1.2Mpa, shrinkage 0.03%, impact sound improvement of 3mm thickness 8dB.
Example 2
The invention provides phosphogypsum-based sound insulation self-leveling mortar, which comprises, by weight, 72 parts of alpha-type high-strength gypsum, 16 parts of building gypsum powder, 22 parts of rubber particles, 0.4 part of cement, 0.03 part of retarder, 0.08 part of water reducer, 0.06 part of thickener, 0.05 part of defoamer, 0.40 part of rubber powder, 0.04 part of polyvinyl alcohol, 0.12 part of wood fiber and 0.18 part of stabilizer.
The building gypsum meets the grade of 3.0 in GB/T9776-2008.
The mesh number of the rubber particles is 30 mesh.
The cement is aluminate cement.
The retarder is a vegetable protein retarder 200P of Swiss ceticarb.
The water reducer is Swiss Sikapolycarboxylic acid high-efficiency water reducer 540P.
The thickener is hydroxypropyl methyl cellulose ether, and the viscosity of the thickener is 6000 Pa.s at 25 ℃.
The defoamer is a powder defoamer P803 composed of hydrocarbon, polyethylene glycol and amorphous silicon dioxide, and is produced by Ming Ling chemical industry in Germany.
The rubber powder is ethylene-vinyl acetate copolymer rubber powder.
The polyvinyl alcohol is cold water instant polyvinyl alcohol powder, and the polymerization degree is 1700.
The length of the wood fiber is 4000 μm.
The stabilizer is WD-230 purchased from Dragon lake technology.
The properties of the obtained slurry were: the basic properties of the material are detected as follows: 30min of fluidity loss 0mm, initial setting time 110min, final setting time 125min,1d flexural strength 1.3Mpa,1d compressive strength 3.2Mpa, dry flexural strength 3.0Mpa, dry compressive strength 8.1Mpa, tensile bonding strength 1.2Mpa, shrinkage 0.02%, impact sound improvement of 3mm thickness 12dB.
Example 3
The invention provides phosphogypsum-based sound insulation self-leveling mortar, which comprises, by weight, 76 parts of alpha-type high-strength gypsum, 0 part of building gypsum powder, 28 parts of rubber particles, 0.4 part of cement, 0 part of retarder, 0.08 part of water reducer, 0.05 part of thickener, 0.05 part of defoamer, 0.40 part of rubber powder, 0.04 part of polyvinyl alcohol, 0.16 part of wood fiber and 0.20 part of stabilizer.
The building gypsum meets the grade of 3.0 in GB/T9776-2008.
The mesh number of the rubber particles is 30 mesh.
The cement is aluminate cement.
The retarder is a vegetable protein retarder 200P of Swiss ceticarb.
The water reducer is Swiss Sikapolycarboxylic acid high-efficiency water reducer 540P.
The thickener is hydroxypropyl methyl cellulose ether, and the viscosity of the thickener is 6000 Pa.s at 25 ℃.
The defoamer is a powder defoamer P803 composed of hydrocarbon, polyethylene glycol and amorphous silicon dioxide, and is produced by Ming Ling chemical industry in Germany.
The rubber powder is ethylene-vinyl acetate copolymer rubber powder.
The polyvinyl alcohol is cold water instant polyvinyl alcohol powder, and the polymerization degree is 1700.
The length of the wood fiber is 4000 μm.
The stabilizer is WD-230 purchased from Dragon lake technology.
The properties of the obtained slurry were: the basic properties of the material are detected as follows: 30min of fluidity loss 0mm, initial setting time 130min, final setting time 150min,1d flexural strength 1.6Mpa,1d compressive strength 4.0Mpa, dry flexural strength 3.2Mpa, dry compressive strength 8.8Mpa, tensile bonding strength 1.1Mpa, shrinkage 0.03%, impact sound improvement amount of 3mm thickness 15dB.
From the test results, the mortar provided by the invention has high construction performance, can obtain materials with high sound insulation, bonding and high strength, and is used for building materials such as floors, and the main raw materials in the mortar provided by the invention are phosphogypsum, waste rubber and the like, thereby being beneficial to recycling of resources and promoting environmental protection.
The foregoing examples are illustrative only and serve to explain some features of the method of the invention. The appended claims are intended to claim the broadest possible scope and the embodiments presented herein are merely illustrative of selected implementations based on combinations of all possible embodiments. It is, therefore, not the intention of the applicant that the appended claims be limited by the choice of examples illustrating the features of the invention. Some numerical ranges used in the claims also include sub-ranges within which variations in these ranges should also be construed as being covered by the appended claims where possible.
Claims (4)
1. The phosphogypsum-based sound insulation self-leveling mortar is characterized by comprising, by weight, 30-140 parts of phosphogypsum-based gypsum, 5-20 parts of sound insulation materials, 0.2-1 part of cement, 0.05-0.1 part of polysaccharide thickening agent, 0.1-0.2 part of plant fibers and 0.2-0.55 part of polymer powder, wherein the phosphogypsum-based gypsum comprises alpha-type high-strength gypsum and building gypsum, and the weight ratio of the phosphogypsum-based gypsum to the building gypsum is (30-80): (0-60); the dynamic viscosity of the polysaccharide thickener at 25 ℃ is 2000-8000 mPa.s; the plant fiber is one or two of wood fiber and straw fiber; the length of the plant fiber is 200-600 mu m; the polymer powder is ethylene-vinyl acetate copolymer rubber powder and polyvinyl alcohol, and the weight ratio of the polymer powder to the polyvinyl alcohol is (0.2-0.5): (0-0.05); the polymerization degree of the polyvinyl alcohol is 1100-1700; the sound insulation material is rubber particles, and the mesh number of the sound insulation material is 20-40 meshes.
2. Phosphogypsum-based sound insulation self-leveling mortar in accordance with claim 1, wherein the polysaccharide thickener is one or more selected from cellulose thickener, starch thickener and modified starch thickener.
3. The phosphogypsum-based sound insulation self-leveling mortar of claim 1, wherein the mortar is prepared from raw materials further comprising an auxiliary agent, and the auxiliary agent comprises one or more of a retarder, a water reducer, a defoaming agent and a stabilizer.
4. Use of phosphogypsum-based acoustic self-leveling mortar according to any one of claims 1-3 in building materials.
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| CN115124315A (en) * | 2022-07-18 | 2022-09-30 | 贵州磷化绿色环保产业有限公司 | Pouring type sand-free self-leveling mortar taking phosphogypsum as main raw material and preparation method and application thereof |
| CN115159946A (en) * | 2022-07-18 | 2022-10-11 | 贵州磷化绿色环保产业有限公司 | High-strength gypsum-based sand-free self-leveling mortar with high fluidity and preparation method and application thereof |
| CN115196936A (en) * | 2022-07-19 | 2022-10-18 | 贵州磷化绿色环保产业有限公司 | Gypsum-based indoor terrace self-leveling concrete prepared from phosphogypsum active powder and preparation method and application thereof |
| CN116102296A (en) * | 2022-12-01 | 2023-05-12 | 河南嘉方实业有限公司 | Low-carbon sound-insulation floor mortar |
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| CN105036683A (en) * | 2015-08-07 | 2015-11-11 | 广东省建筑科学研究院集团股份有限公司 | Gypsum-based sound insulation leveling adhesion material for monolithic sound insulation floor slab and preparation method thereof |
| CN105753417A (en) * | 2015-12-11 | 2016-07-13 | 派丽(上海)管理有限公司 | Beta gypsum based self-leveling material with soundproof effect and preparation method thereof |
| CN106904925B (en) * | 2017-04-09 | 2019-12-03 | 冀东水泥重庆江津有限责任公司 | A kind of ardealite based self-leveling material |
| CN111807804B (en) * | 2020-07-20 | 2022-06-07 | 贵州川恒化工股份有限公司 | Sand-free paste-based self-leveling mortar and preparation method thereof |
| CN111825406A (en) * | 2020-07-29 | 2020-10-27 | 瓮福化工科技有限公司 | Phosphogypsum-based self-leveling mortar |
| CN112010624A (en) * | 2020-09-08 | 2020-12-01 | 广东博智林机器人有限公司 | Cement-based self-leveling mortar and preparation method thereof |
| CN112299805A (en) * | 2020-11-04 | 2021-02-02 | 越秀联合(贵州)新材料有限公司 | Sand-free desulfurized gypsum self-leveling mortar and preparation method thereof |
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