CN112694343B - High-strength heat-preservation sound-insulation gypsum-based self-leveling mortar and preparation method thereof - Google Patents

High-strength heat-preservation sound-insulation gypsum-based self-leveling mortar and preparation method thereof Download PDF

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CN112694343B
CN112694343B CN202110172426.5A CN202110172426A CN112694343B CN 112694343 B CN112694343 B CN 112694343B CN 202110172426 A CN202110172426 A CN 202110172426A CN 112694343 B CN112694343 B CN 112694343B
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gypsum
based self
sound
leveling mortar
insulating
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CN112694343A (en
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赵松海
宋涛
王文战
杨杰
申启航
崔献路
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Henan Qiangnai New Materials Co ltd
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Henan Qiangnai New Materials Co ltd
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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
    • C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
    • 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
    • C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
    • C04B28/147—Calcium sulfate hemi-hydrate with a specific crystal form beta-hemihydrate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0045—Polymers chosen for their physico-chemical characteristics
    • C04B2103/0057—Polymers chosen for their physico-chemical characteristics added as redispersable powders
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • 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
    • C04B2111/40—Porous or lightweight 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/52—Sound-insulating 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
    • 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
    • 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
    • C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
    • 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

Abstract

The invention provides a high-strength heat-insulating sound-insulating gypsum-based self-leveling mortar and a preparation method thereof, wherein the mortar comprises dry powder, polyphenyl granules and water; the dry powder comprises the following components in parts by weight: 70-90 parts of building gypsum, 5-10 parts of cement, 0-15 parts of fly ash, 0.1-0.2 part of gypsum retarder, 0.1-0.2 part of rubber powder, 0.05-0.15 part of defoamer, 0.1-0.3 part of water reducer and 0.2-0.5 part of foaming agent; the preparation method comprises the steps of mixing the dry powder, then mixing the dry powder with water to obtain slurry, and finally doping the polyphenyl particles to obtain the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar. The high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar prepared by the invention has good heat-insulating and sound-insulating properties, and when the mortar is used in a floor system, the cost is reduced, the heat-insulating and sound-insulating properties are improved, and the problem that hollowing and cracking are easy to occur when an extruded sheet is adopted in a traditional floor system is effectively solved.

Description

High-strength heat-preservation sound-insulation gypsum-based self-leveling mortar and preparation method thereof
Technical Field
The invention belongs to the technical field of gypsum-based building materials, and particularly relates to high-strength heat-insulation sound-insulation gypsum-based self-leveling mortar and a preparation method thereof.
Background
The self-leveling gypsum-base mortar is a kind of dry powder mortar specially for leveling ground, which is prepared with gypsum material, special aggregate and various building chemical additives and through careful preparation and mixing. Compared with gypsum dry powder mortar popularized by a policy of government, the gypsum-based self-leveling mortar has the same social and economic benefits of energy conservation and emission reduction as an important product for replacing cement and reducing carbon emission in China. Meanwhile, the ground constructed by the gypsum-based self-leveling mortar has the advantages of accurate size, extremely high levelness, easiness and convenience in operation and high efficiency, and is widely used in ground construction of ground floors. Along with the improvement of living standard, people pay more and more attention to the performance of sound insulation and heat preservation of buildings, and the noise generated by the impact sound of the upper floor is very unpleasant, so that the sleeping of residents on the lower floor is influenced, and the mood of people is also influenced, therefore, people particularly need a floor capable of resisting impact and insulating sound.
The traditional building ground heat preservation system is that directly on concrete slab through laying the extruded sheet as the heat preservation, then pack big husky concrete after, carry out the laying of surface decoration again, though the extruded sheet has certain heat preservation effect, its heat-proof quality, heat conductivility are relatively poor, to the ground that needs to lay ground heating, the use greatly reduced of extruded sheet warms up the heat transfer performance, causes a large amount of wasting of resources.
In view of environmental protection and energy conservation, the gypsum-based self-leveling mortar has the advantage of light weight, and is used for replacing an extruded sheet in a floor system of a floor heating building, but the existing heat-insulation and sound-insulation mortar does not have the self-leveling performance, and the self-leveling mortar does not have the heat-insulation and sound-insulation performance.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide high-strength heat-insulation sound-insulation gypsum-based self-leveling mortar and a preparation method thereof, which are used for solving the problem of poor ground heat-insulation and sound-insulation effects in a ground system of a ground heating floor in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme:
a high-strength heat-insulating sound-insulating gypsum-based self-leveling mortar comprises a dry powder, polyphenyl granules and water;
the dry powder comprises the following components in parts by weight: 70-90 parts of building gypsum, 5-10 parts of cement, 0-15 parts of fly ash, 0.1-0.2 part of gypsum retarder, 0.1-0.2 part of rubber powder, 0.05-0.15 part of defoamer, 0.1-0.3 part of water reducer and 0.2-0.5 part of foaming agent.
The high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar has the advantages that as a preferable scheme,
the mass ratio of the polyphenyl particles to the dry powder is (0.01-0.05): 1;
the mass ratio of the water to the dry powder is (0.5-0.75): 1;
preferably, the building gypsum is beta hemihydrate gypsum; the specific surface area of the building gypsum is 300-600 m2/kg。
The high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar is preferably prepared from portland cement or sulphoaluminate cement.
According to the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar, as a preferred scheme, the fly ash is secondary fly ash; the particle size of the fly ash is 40-50 mu m.
According to the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar, as a preferable scheme, the gypsum retarder is tartaric acid, sodium acrylate or a composite retarder formed by mixing tartaric acid and sodium acrylate;
preferably, the rubber powder is redispersible latex powder; the re-dispersible latex powder is one of ethylene/vinyl acetate copolymer powder, vinyl acetate/tertiary carbonic acid ethylene copolymer powder and acrylic acid copolymer powder;
more preferably, the defoamer is a silicone defoamer;
more preferably, the water reducing agent is a polycarboxylic acid water reducing agent;
more preferably, the foaming agent is a physical foaming agent, and the physical foaming agent is one or a mixture of alkanes and fluorocarbons.
According to the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar, as a preferable scheme, the diameter of the polyphenyl particles is 2-4 mm.
The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar comprises the following steps:
step S1, weighing the building gypsum, the cement and the fly ash according to the proportion, putting the building gypsum, the cement and the fly ash into a container, stirring and mixing uniformly, then sequentially adding the gypsum retarder, the rubber powder, the defoaming agent, the water reducing agent and the foaming agent, stirring and mixing uniformly to obtain a dry powder;
step S2, adding water into the dry powder obtained in the step S1, stirring and mixing to obtain slurry;
and S3, adding polyphenyl particles into the slurry obtained in the step S2, and stirring for a period of time to obtain the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar.
In the method for preparing the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar, preferably, the method for preparing the building gypsum in step S1 comprises the following steps: and (3) calcining the desulfurized gypsum at 105-150 ℃ for 1-2 h, cooling to room temperature, then grinding in a ball mill, and aging for 5-7 d to obtain the building gypsum.
According to the preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar, as a preferable scheme, in the step S2, the stirring speed is 500-1000 r/min, and the stirring time is 2-6 min.
According to the preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar, as a preferable scheme, in the step S3, the stirring speed is 500-1000 r/min, and the stirring time is 10-60S.
Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:
the gypsum-based material is adopted in the invention, which is beneficial to environmental protection from the aspect of environmental protection, and the gypsum-based material has the characteristic of light weight, so that the weight of the floor surface is greatly reduced; the prepared self-leveling slurry is micro-bubble foaming self-leveling mortar and mainly plays a role in sound absorption and heat preservation, and the polystyrene particles are doped outside, so that the heat preservation performance of the finally prepared gypsum-based self-leveling mortar with high strength, good heat preservation and sound insulation performance is further improved.
According to the preparation method of the gypsum-based self-leveling mortar, water and dry powder are stirred, then the polyphenyl granules are added, and due to the addition of a proper amount of foaming agent and defoaming agent, a trace amount of defoaming agent is added to eliminate larger bubbles, so that the ground heat-insulating and sound-insulating effect is improved, and the problem of ground collapse caused by overlarge bubbles is avoided, so that the ground quality is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived from the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
The invention adopts the gypsum-based material from the environmental protection perspective, which is beneficial to environmental protection, and the gypsum-based material has the characteristic of light weight from the building weight perspective, thereby greatly reducing the weight of the building floor; according to the preparation method of the gypsum-based self-leveling mortar, water and powder are stirred firstly, and then the polyphenyl granules are doped, so that the heat preservation and sound insulation effects of the ground are improved, and the problem of ground collapse caused by overlarge bubbles is avoided, so that the ground quality is improved. The gypsum-based self-leveling mortar with high strength, good heat preservation and sound insulation performance prepared by the invention is used in a floor system, compared with the traditional floor heat preservation system, the floor system can meet the national impact sound insulation standard, and when the gypsum-based self-leveling mortar is used in a floor heating floor, the used materials are less, the thickness of the floor is greatly reduced, the mortar is fast in hardening and free of cracking, and the problems of poor heat preservation and energy saving effects and poor sound insulation effects of a floor system are effectively solved.
The invention provides high-strength heat-insulating sound-insulating gypsum-based self-leveling mortar which comprises dry powder, polyphenyl granules and water.
The dry powder comprises the following components in parts by weight: 70 to 90 parts (such as 72 parts, 74 parts, 76 parts, 78 parts, 80 parts, 82 parts, 84 parts, 86 parts and 88 parts) of building gypsum, 5 to 10 parts (such as 5.5 parts, 6.0 parts, 6.5 parts, 7.0 parts, 7.5 parts, 8.0 parts, 8.5 parts, 9.0 parts and 9.5 parts) of cement, 0 to 15 parts (such as 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts and 14 parts) of fly ash, 0.1 to 0.2 part (such as 0.11 part, 0.12 part, 0.13 part, 0.14 part, 0.15 part, 0.16 part, 0.17 part, 0.18 part and 0.19 part) of gypsum retarder, 0.1 to 0.2 part (such as 0.11 part, 0.12 part, 0.13 part, 0.14 part, 0.15 part, 0.16 part, 0.17 part, 0.18 part and 0.19 part) of rubber powder, 0.1 to 0.2 part (such as 0.11 part, 0.12 part, 0.13 part, 0.15 part, 0.08 part, 0.15 part, 0.05 part, 0.15 part of water reducer, 0.06 part, 0.15 part, 0.05 part, 0.15 part, 0.06 part, 0.15 part of water reducer, 0.1.06 part, 0.06 part, 0.15 part, 0.1 part, 0.15 part, 0.1 part, 0.1.1 part, 0.06 part, 0.15 part, 0.1 part, 0.1.1 part, 0.1 part, 0.15 part, 0.1 part, 0.06 part, 0.1 part, 1 part, 0.15 part, 0.1 part, 0.15 part, 0.1 part, and 0.15 part of water reducer, 1 part, 0.1 part of water reducer, 0.15 part, 0.16 part, 0.18 part, 0.2 part, 0.22 part, 0.24 part, 0.26 part, 0.28 part), 0.2-0.5 part of foaming agent (e.g., 0.22 part, 0.25 part, 0.28 part, 0.30 part, 0.32 part, 0.35 part, 0.38 part, 0.4 part, 0.42 part, 0.45 part, 0.48 part).
In the specific embodiment of the invention, the mass ratio of the polyphenyl particles to the dry powder is (0.01-0.05): 1 (e.g., 0.015: 1, 0.02: 1, 0.025: 1, 0.03: 1, 0.035: 1, 0.04: 1, 0.045: 1).
In the specific embodiment of the invention, the mass ratio of water to dry powder is (0.5-0.75): 1 (e.g., 0.52: 1, 0.54: 1, 0.55: 1, 0.56: 1, 0.58: 1, 0.6: 1, 0.62: 1, 0.65: 1, 0.68: 1, 0.70: 1, 0.72: 1, 0.74: 1).
When the addition amount of water is too much, the strength of the finally prepared gypsum-based self-leveling mortar after solidification is low, and the use requirement is not satisfied enough; when the amount of water added is too small, the strength of the resulting gypsum-based self-leveling mortar after setting is high, but the fluidity is deteriorated, so that the amount of water added is controlled within a certain range.
Firstly, water and dry powder are stirred to obtain micro-bubble foaming type slurry, then the slurry is doped with polyphenyl granules, and due to the addition of proper amount of foaming agent and defoaming agent, the micro-amount of defoaming agent is added to eliminate the foaming agentExcept that great bubble, when improving ground heat preservation syllable-dividing effect, avoid appearing the too big problem that leads to ground to sink of bubble moreover to improve ground quality. In a specific embodiment of the invention, the building gypsum is beta hemihydrate gypsum; the specific surface area of the building gypsum is 300-600 m2Kg (e.g. 310 m)2/kg、350m2/kg、400m2/kg、450m2/kg、500m2/kg、550m2/kg、590m2/kg)。
In a particular embodiment of the invention, the cement is a portland cement or a sulphoaluminate cement. Wherein the strength grade of the portland cement is 42.5 or 52.5.
In a specific embodiment of the invention, the fly ash is a secondary fly ash; the particle size of the fly ash is 40-50 μm (such as 41 μm, 42 μm, 43 μm, 44 μm, 45 μm, 46 μm, 47 μm, 48 μm and 49 μm).
The fly ash mainly comprises the following chemical components in percentage by weight:
o: 47.83%, Si: 11.48-31.14%, Al: 6.40-22.91%, Fe: 1.90% -18.51%, Ca: 0.30% -25.10%, K: 0.22-3.10%, Mg: 0.05-1.92%, Ti: 0.40% -1.80%, S: 0.03% -4.75%, Na: 0.05% -1.40%, P: 0.00% -0.90%, Cl: 0.00% -0.12%, others: 0.50 to 29.12 percent.
In the specific embodiment of the invention, the gypsum retarder is tartaric acid, sodium acrylate, or a composite retarder formed by mixing tartaric acid and sodium acrylate.
In the specific embodiment of the invention, the rubber powder is re-dispersible latex powder; preferably, the redispersible latex powder is one of ethylene/vinyl acetate copolymer rubber powder, vinyl acetate/versatic acid ethylene copolymer rubber powder and acrylic acid copolymer rubber powder.
In a particular embodiment of the invention, the defoamer is a silicone defoamer.
In the specific embodiment of the invention, the water reducing agent is a polycarboxylic acid water reducing agent.
In a particular embodiment of the invention, the blowing agent is a physical blowing agent. The blowing agent is a substance which causes pores of a target substance, and the physical blowing agent is a foam pore, and is a compound formed by a change in physical form of a certain substance, that is, by expansion of a compressed gas, volatilization of a liquid, or dissolution of a solid. The foaming agents have higher surface activity, can effectively reduce the surface tension of liquid, are arranged on the surface of a liquid film in an electric double-layer mode to surround air to form bubbles, and then form foam by single bubbles.
Preferably, the physical foaming agent is one or a mixture of alkanes and fluorocarbons. Wherein the physical foaming agent is prepared by compounding one or more of n-pentane, n-hexane, n-heptane, petroleum ether, trichlorofluoromethane, dichlorodifluoromethane and dichlorotetrafluoroethane.
In an embodiment of the present invention, the polyphenyl granules have a diameter of 2 to 4mm (e.g., 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3.0mm, 3.2mm, 3.4mm, 3.6mm, 3.8 mm). When the polyphenyl particles are too large, the polyphenyl particles are added into the slurry, so that the compactness of the prepared gypsum-based self-leveling mortar after solidification is not enough; the polyphenyl particles are too small, and a large amount of polyphenyl particles are needed under the same mass, so that the prepared gypsum-based self-leveling mortar has low cohesiveness and is loose, and the dry density of the solidified mortar is large.
In order to better facilitate understanding of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar, the invention also specifically provides a preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar, which comprises the following steps:
and step S1, weighing the building gypsum, the cement and the fly ash according to the proportion, putting the building gypsum, the cement and the fly ash into a container, stirring and mixing uniformly, then sequentially adding the gypsum retarder, the rubber powder, the defoaming agent, the water reducing agent and the foaming agent, stirring and mixing uniformly to obtain a dry powder material.
In the embodiment of the present invention, the preparation method of the building gypsum in step S1 is: the desulfurization gypsum is calcined for 1-2 h (such as 1.1h, 1.2h, 1.3h, 1.4h, 1.5h, 1.6h, 1.7h, 1.8h and 1.9h) at 105-150 ℃ (such as 110 ℃, 115 ℃, 120 ℃, 125 ℃, 130 ℃, 135 ℃, 140 ℃ and 145 ℃), cooled to room temperature, ground in a ball mill, and aged for 5-7 d (5.2d, 5.4d, 5.6d, 5.8d, 6.0d, 6.2d, 6.4d, 6.6d and 6.8d) to obtain the building gypsum.
And step S2, adding water into the dry powder material obtained in the step S1, and stirring and mixing to obtain slurry.
In the embodiment of the present invention, in step S2, the stirring speed is 500-1000 r/min (e.g., 550r/min, 600r/min, 650r/min, 700r/min, 750r/min, 800r/min, 850r/min, 900r/min, 950r/min), and the stirring time is 2-6 min (e.g., 2.5min, 3.0min, 3.5min, 4.0min, 4.5min, 5.0min, 5.5 min).
And S3, adding polyphenyl particles into the slurry obtained in the step S2, and stirring for a period of time to obtain the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar. The heat insulation performance of the finally prepared gypsum-based self-leveling mortar with high strength, good heat insulation and sound insulation performance is further improved by adding the polyphenyl particles.
In the embodiment of the present invention, in step S3, the stirring speed is 500-1000 r/min (e.g., 550r/min, 600r/min, 650r/min, 700r/min, 750r/min, 800r/min, 850r/min, 900r/min, 950r/min), and the stirring time is 10-60S (e.g., 15S, 20S, 25S, 30S, 35S, 40S, 45S, 50S, 55S).
Unless otherwise specified, the raw materials used in the examples and comparative examples of the present invention satisfy the following performance requirements: the building gypsum is prepared by calcining desulfurized gypsum at 140 ℃ for 2 hours, cooling to room temperature, then grinding in a ball mill, and aging for 5-7 d; the cement is 42.5-grade portland cement; the specific surface area of the building gypsum is 300-600 m2Per kg; the fly ash is secondary fly ash, and the particle size of the fly ash is 40-50 mu m; the diameter of the polyphenyl granules is 2-4 mm.
Example 1
The embodiment provides high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises dry powder, polyphenyl granules and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 80 parts of building gypsum, 10 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.05 part of defoamer, 0.2 part of water reducer and 0.3 part of foaming agent.
The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar in the embodiment comprises the following steps:
s1, weighing 80kg of building gypsum, 10kg of cement and 10kg of fly ash in a container according to the proportion, stirring and mixing uniformly, then sequentially adding 0.1kg of gypsum retarder, 0.15kg of rubber powder, 0.05kg of defoamer, 0.2kg of water reducer and 0.3kg of foaming agent, stirring and mixing uniformly to obtain a dry powder;
step S2, adding 60kg of water into the dry powder, and stirring for 5min at a stirring speed of 800r/min to obtain slurry;
and step S3, adding 2kg of polyphenyl granules into the slurry, and stirring for 45S at a stirring speed of 800r/min to obtain the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar.
And (3) performance testing:
the strength and the heat preservation performance of the high-strength heat-preservation and sound-insulation gypsum-based self-leveling mortar prepared in the embodiment are tested according to the standard JG/T266-201; the impact sound insulation performance of the high-strength heat-insulation sound-insulation gypsum-based self-leveling mortar prepared in the embodiment is tested according to the standard GB/T19889.6-2005.
The initial setting time of the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar prepared in the embodiment is 55-65 min; the absolute dry compressive strength is 2.2 MPa; the dry density was 400kg/m3(ii) a The thermal conductivity is 0.1-0.15W/(m.K); the impact sound insulation effect was 67 db.
Example 2
The embodiment provides high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises dry powder, polyphenyl granules and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 85 parts of building gypsum, 5 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.1 part of defoamer, 0.2 part of water reducer and 0.3 part of foaming agent.
The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar in the embodiment comprises the following steps:
s1, weighing 85kg of building gypsum, 5kg of cement and 10kg of fly ash according to a ratio, putting the building gypsum, the cement and the fly ash into a container, stirring and mixing uniformly, then sequentially adding 0.1kg of gypsum retarder, 0.15kg of rubber powder, 0.1kg of defoamer, 0.2kg of water reducer and 0.3kg of foaming agent, stirring and mixing uniformly to obtain a dry powder;
other steps and methods are the same as those in embodiment 1, and are not described herein again.
And (3) performance testing:
the performance of the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar prepared in the embodiment is tested, and the test standard and method are the same as those in embodiment 1, and are not described again.
Through tests, the initial setting time of the high-strength heat-preservation and sound-insulation gypsum-based self-leveling mortar prepared in the embodiment is 55-65 min; the absolute dry compressive strength is 2.1 MPa; the dry density was 410kg/m3(ii) a The thermal conductivity is 0.1-0.15W/(m.K); the impact sound insulation effect is 65 db.
Example 3
The embodiment provides high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises dry powder, polyphenyl granules and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 90 parts of building gypsum, 10 parts of cement, 0 part of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.15 part of defoamer, 0.2 part of water reducer and 0.3 part of foaming agent.
The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar in the embodiment comprises the following steps:
s1, weighing 90kg of building gypsum and 10kg of cement according to the proportion, putting the building gypsum and the cement into a container, stirring and mixing uniformly, then sequentially adding 0.1kg of gypsum retarder, 0.15kg of rubber powder, 0.15kg of defoamer, 0.2kg of water reducer and 0.3kg of foaming agent, stirring and mixing uniformly to obtain a dry powder;
other steps and methods are the same as those in embodiment 1, and are not described herein again.
And (3) performance testing:
the performance of the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar prepared in the embodiment is tested, and the test standard and method are the same as those in embodiment 1, and are not described again.
Tested byThe initial setting time of the high-strength heat-preservation and sound-insulation gypsum-based self-leveling mortar prepared in the embodiment is 55-65 min; the absolute dry compressive strength is 2.0 MPa; the dry density was 412kg/m3(ii) a The thermal conductivity is 0.1-0.15W/(m.K); the impact sound insulation effect is 65 db.
Example 4
The embodiment provides high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises dry powder, polyphenyl granules and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 80 parts of building gypsum, 10 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.1 part of defoamer, 0.2 part of water reducer and 0.3 part of foaming agent.
The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar in the embodiment comprises the following steps:
the amount of the antifoaming agent added in step S1 was 0.1 kg; the amount of the doped polyphenyl granules in the step S3 is 3kg, and other steps and methods are the same as those in example 1 and are not repeated herein.
And (3) performance testing:
the performance of the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar prepared in the embodiment is tested, and the test standard and method are the same as those in embodiment 1, and are not described again.
Through tests, the initial setting time of the high-strength heat-preservation and sound-insulation gypsum-based self-leveling mortar prepared in the embodiment is 55-65 min; the absolute dry compressive strength is 2.0 MPa; the dry density was 395kg/m3(ii) a The thermal conductivity is 0.1-0.15W/(m.K); the impact sound insulation effect was 64 db.
Example 5
The embodiment provides high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises dry powder, polyphenyl granules and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 80 parts of building gypsum, 10 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.1 part of defoamer, 0.2 part of water reducer and 0.3 part of foaming agent.
The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar in the embodiment comprises the following steps:
the amount of the antifoaming agent added in step S1 was 0.1 kg; the amount of the polyphenylene particles in step S3 was 4kg, and the other steps were the same as in example 1, and therefore, the description thereof is omitted.
And (3) performance testing:
the performance of the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar prepared in the embodiment is tested, and the test standard and method are the same as those in embodiment 1, and are not described again.
Through tests, the initial setting time of the high-strength heat-preservation and sound-insulation gypsum-based self-leveling mortar prepared in the embodiment is 55-65 min; the absolute dry compressive strength is 1.9 MPa; the dry density was 390kg/m3(ii) a The thermal conductivity coefficient is 0.1-0.15W/(m.K); the impact sound insulation effect was 62 db.
Example 6
The embodiment provides high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises dry powder, polyphenyl granules and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 80 parts of building gypsum, 10 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.1 part of defoamer, 0.2 part of water reducer and 0.3 part of foaming agent.
The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar in the embodiment comprises the following steps:
the amount of the antifoaming agent added in step S1 was 0.1 kg; the amount of the polyphenyl granules in step S3 was 5kg, and the other steps and methods were the same as in example 1 and will not be described again.
And (3) performance testing:
the performance of the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar prepared in the embodiment is tested, and the test standard and method are the same as those in embodiment 1, and are not described again.
Through tests, the initial setting time of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar prepared in the embodiment is 55-65 min; the absolute dry compressive strength is 1.9 MPa; the dry density was 390kg/m3(ii) a The thermal conductivity is 0.1-0.15W/(m.K); the impact sound insulation effect is 60 db.
Example 7
The embodiment provides high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises dry powder, polyphenyl granules and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 80 parts of building gypsum, 10 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.1 part of defoamer, 0.2 part of water reducer and 0.2 part of foaming agent.
The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar in the embodiment comprises the following steps:
in the step S1, the amount of the defoaming agent added is 0.15kg, and the amount of the foaming agent added is 0.2 kg; the other steps and methods are the same as embodiment 1, and are not described herein again.
And (3) performance testing:
the performance of the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar prepared in the embodiment is tested, and the test standard and method are the same as those in embodiment 1, and are not described again.
Through tests, the initial setting time of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar prepared in the embodiment is 55-65 min; the absolute dry compressive strength is 2.1 MPa; the dry density is 396kg/m3(ii) a The thermal conductivity is 0.1-0.15W/(m.K); the impact sound insulation effect is 65 db.
Example 8
The embodiment provides high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises dry powder, polyphenyl granules and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 80 parts of building gypsum, 10 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.1 part of defoamer, 0.2 part of water reducer and 0.4 part of foaming agent.
The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar in the embodiment comprises the following steps:
in the step S1, the amount of the defoaming agent added is 0.15kg, and the amount of the foaming agent added is 0.4 kg; the other steps and methods are the same as embodiment 1, and are not described herein again.
And (3) performance testing:
the performance of the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar prepared in the embodiment is tested, and the test standard and method are the same as those in embodiment 1, and are not described again.
Through tests, the initial setting time of the high-strength heat-preservation and sound-insulation gypsum-based self-leveling mortar prepared in the embodiment is 55-65 min; the absolute dry compressive strength is 1.9 MPa; the dry density is 385kg/m3(ii) a The thermal conductivity is 0.1-0.15W/(m.K); the impact sound insulation effect was 63 db.
Example 9
The embodiment provides a high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises a dry powder, polyphenyl particles and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 80 parts of building gypsum, 10 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.1 part of defoamer, 0.2 part of water reducer and 0.5 part of foaming agent.
The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar in the embodiment comprises the following steps:
in the step S1, the amount of the defoaming agent added is 0.15kg, and the amount of the foaming agent added is 0.5 kg; the other steps and methods are the same as embodiment 1, and are not described herein again.
And (3) performance testing:
the performance of the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar prepared in the embodiment is tested, and the test standard and method are the same as those in embodiment 1, and are not described again.
Through tests, the initial setting time of the high-strength heat-preservation and sound-insulation gypsum-based self-leveling mortar prepared in the embodiment is 55-65 min; the absolute dry compressive strength is 1.5 MPa; the dry density is 363kg/m3(ii) a The thermal conductivity is 0.1-0.15W/(m.K); the impact sound insulation effect is 60 db.
Example 10
The embodiment provides a high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises a dry powder, polyphenyl particles and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 80 parts of building gypsum, 10 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.15 part of defoamer, 0.2 part of water reducer and 0.3 part of foaming agent.
The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar in the embodiment comprises the following steps:
the amount of the antifoaming agent added in step S1 was 0.15 kg; in step S2, the addition amount of water is 50 kg; the other steps and methods are the same as embodiment 1, and are not described herein again.
And (4) performance testing:
the performance of the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar prepared in the embodiment is tested, and the test standard and method are the same as those in embodiment 1, and are not described again.
Through tests, the initial setting time of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar prepared in the embodiment is 55-65 min; the absolute dry compressive strength is 2.4 MPa; the dry density is 365kg/m3(ii) a The thermal conductivity coefficient is 0.1-0.15W/(m.K); the impact sound insulation effect is 65 db.
Example 11
The embodiment provides high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises dry powder, polyphenyl granules and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 80 parts of building gypsum, 10 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.15 part of defoamer, 0.2 part of water reducer and 0.3 part of foaming agent.
The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar in the embodiment comprises the following steps:
the amount of the antifoaming agent added in step S1 was 0.15 kg; the addition amount of water in the step S2 is 65 kg; other steps and methods are the same as embodiment 1, and are not described herein again.
And (3) performance testing:
the performance of the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar prepared in the embodiment is tested, and the test standard and method are the same as those in embodiment 1, and are not described again.
Through tests, the initial setting time of the high-strength heat-preservation and sound-insulation gypsum-based self-leveling mortar prepared in the embodiment is 55-65 min; the absolute dry compressive strength is 1.8 MPa; the dry density was 356kg/m3(ii) a The thermal conductivity is 0.1-0.15W/(m.K); the impact sound insulation effect is 62 db.
Example 12
The embodiment provides high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises dry powder, polyphenyl granules and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 80 parts of building gypsum, 10 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.15 part of defoamer, 0.2 part of water reducer and 0.3 part of foaming agent.
The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar in the embodiment comprises the following steps:
the amount of the antifoaming agent added in step S1 was 0.15 kg; the addition amount of water in the step S2 is 75 kg; the other steps and methods are the same as embodiment 1, and are not described herein again.
And (3) performance testing:
the performance of the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar prepared in the embodiment is tested, and the test standard and method are the same as those in embodiment 1, and are not described again.
Through tests, the initial setting time of the high-strength heat-preservation and sound-insulation gypsum-based self-leveling mortar prepared in the embodiment is 55-65 min; the absolute dry compressive strength is 1.5 MPa; the dry density was 350kg/m3(ii) a The thermal conductivity is 0.1-0.15W/(m.K); the impact sound insulation effect is 60 db.
Comparative example 1
The comparative example provides high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises dry powder, polyphenyl granules and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 80 parts of building gypsum, 10 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.15 part of defoamer, 0.2 part of water reducer and 0.3 part of foaming agent.
The preparation method of the gypsum-based self-leveling mortar in the comparative example comprises the following steps: in step S3, no polyphenyl particles were added, and the other steps and methods were the same as in example 12 and will not be described herein again.
And (3) performance testing:
the performance of the gypsum-based self-leveling mortar prepared in the comparative example was tested, and the test standards and methods were the same as those in example 1, and are not described herein again.
Through tests, the initial setting time of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar prepared in the comparative example is 55-65 min; the absolute dry compressive strength is 1.9 MPa; the dry density was 403kg/m3(ii) a The thermal conductivity is 0.2-0.25W/(m.K); the impact sound insulation effect was 68 db. Namely, when no polyphenyl particles are added, the prepared mortar has poor heat insulation performance.
Comparative example 2
The comparative example provides high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar which comprises dry powder, polyphenyl granules and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 80 parts of building gypsum, 10 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.15 part of defoamer, 0.2 part of water reducer and 0.3 part of foaming agent.
The preparation method of the gypsum-based self-leveling mortar in the comparative example comprises the following steps: the amount of the polyphenylene particles added in step S3 was 10kg, and other steps and methods were the same as those in example 12 and will not be described again.
And (3) performance testing:
tests prove that the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar prepared in the comparative example has greatly reduced strength and low binding power due to excessive addition of polyphenyl particles, so that the ground is too loose after the mortar is solidified, and the mortar cannot be applied in practice.
Comparative example 3
The comparative example provides a gypsum-based self-leveling mortar, which comprises a dry powder, polyphenyl granules and water;
the dry powder of the gypsum-based self-leveling mortar comprises the following components in parts by weight: 80 parts of building gypsum, 10 parts of cement, 10 parts of fly ash, 0.1 part of gypsum retarder, 0.15 part of rubber powder, 0.15 part of defoamer, 0.2 part of water reducer and 0 part of foaming agent.
The preparation method of the gypsum-based self-leveling mortar in the comparative example comprises the following steps: the amount of the foaming agent added in step S1 was 0kg, and the other steps and methods were the same as in example 12 and will not be described herein again.
And (3) performance testing:
the performance of the gypsum-based self-leveling mortar prepared in the comparative example was tested, and the test standards and methods were the same as those in example 1, and are not described herein again.
Through tests, the gypsum-based self-leveling mortar prepared in the comparative example has the initial setting time of 55-65 min; the absolute dry compressive strength is 2.5 MPa; the dry density is 465kg/m3(ii) a The thermal conductivity is 0.15-0.2W/(m.K); the impact sound insulation effect was 79 db. Since the foaming agent is not added in the comparative example, the thermal insulation and sound insulation effects of the finally prepared mortar are reduced without the foaming agent. When too much foaming agent is added, the gypsum-based self-leveling mortar is easy to collapse, the expansion coefficient of the mortar is increased, and the heat-insulating and sound-insulating effects are also reduced.
The following table 1 shows performance data of the gypsum-based self-leveling mortars prepared in examples 1 to 9 and comparative examples 1 to 3.
Properties of gypsum-based self-leveling mortars prepared in Table 1, examples and comparative example
Figure BDA0002939198810000151
Figure BDA0002939198810000161
In conclusion, the gypsum-based self-leveling mortar with high strength, good heat preservation and sound insulation performance, prepared by the method, is fast in hardening and free of cracking, and when the gypsum-based self-leveling mortar is used in a floor system, compared with a traditional floor heat preservation system, the floor system can meet the national impact sound insulation standard, and the mortar effectively solves the problems of poor heat preservation and energy saving effects and poor sound insulation effects of a floor transmission system; in addition, in the invention, water and powder are stirred, then the polyphenyl granules are added, and a proper amount of foaming agent is added into the dry powder, so that the ground heat-insulation and sound-insulation effect is improved, and the problem of ground collapse caused by overlarge bubbles is avoided, thereby improving the ground quality.
The above description is only exemplary of the invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the invention is intended to be covered by the appended claims.

Claims (11)

1. The high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar is characterized by comprising dry powder, polyphenyl granules and water;
the dry powder comprises the following components in parts by weight: 70-90 parts of building gypsum, 5-10 parts of cement, 0-15 parts of fly ash, 0.1-0.2 part of gypsum retarder, 0.1-0.2 part of rubber powder, 0.05-0.15 part of defoamer, 0.1-0.3 part of water reducer and 0.2-0.5 part of foaming agent;
the mass ratio of the polyphenyl particles to the dry powder is (0.01-0.05): 1;
the mass ratio of the water to the dry powder is (0.5-0.75): 1;
the foaming agent is a physical foaming agent, and the physical foaming agent is one or a mixture of more of alkane and fluorocarbon;
the diameter of the polyphenyl granules is 2-4 mm.
2. The high strength thermal and acoustical gypsum-based self-leveling mortar of claim 1, wherein said building gypsum is beta hemihydrate gypsum; the specific surface area of the building gypsum is 300-600 m2/kg。
3. The high strength thermal and acoustical gypsum-based self-leveling mortar of claim 1, wherein said cement is a portland cement or a sulphoaluminate cement.
4. The high strength thermal insulation sound insulation gypsum-based self-leveling mortar of claim 1, wherein the fly ash is a secondary fly ash; the particle size of the fly ash is 40-50 mu m.
5. The high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar of claim 1, wherein the gypsum retarder is tartaric acid, sodium acrylate, or a composite retarder formed by mixing tartaric acid and sodium acrylate.
6. The high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar of claim 1, wherein the rubber powder is redispersible latex powder; the re-dispersible latex powder is one of ethylene/vinyl acetate copolymer powder, vinyl acetate/versatic acid ethylene copolymer powder and acrylic acid copolymer powder.
7. The high strength thermal and acoustical gypsum-based self-leveling mortar of claim 1, wherein said defoamer is a silicone defoamer.
8. The high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar of claim 1, wherein the water reducer is a polycarboxylic acid water reducer.
9. The preparation method of the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar as claimed in any one of claims 1 to 8, wherein the preparation method comprises the following steps:
step S1, weighing the building gypsum, the cement and the fly ash according to the proportion, putting the building gypsum, the cement and the fly ash into a container, stirring and mixing uniformly, then sequentially adding the gypsum retarder, the rubber powder, the defoaming agent, the water reducing agent and the foaming agent, stirring and mixing uniformly to obtain a dry powder;
step S2, adding water into the dry powder obtained in the step S1, stirring and mixing to obtain slurry;
step S3, adding polyphenyl particles into the slurry obtained in the step S2, and stirring for a period of time to obtain the high-strength heat-preservation sound-insulation gypsum-based self-leveling mortar;
the preparation method of the building gypsum comprises the following steps: and (3) calcining the desulfurized gypsum at 105-150 ℃ for 1-2 h, cooling to room temperature, then grinding in a ball mill, and aging for 5-7 d to obtain the building gypsum.
10. The method for preparing the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar according to claim 9, wherein in the step S2, the stirring speed is 500-1000 r/min, and the stirring time is 2-6 min.
11. The method for preparing the high-strength heat-insulating and sound-insulating gypsum-based self-leveling mortar according to claim 9, wherein in the step S3, the stirring speed is 500-1000 r/min, and the stirring time is 10-60S.
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