CN114621026B - Gypsum-based light sound insulation prefabricated groove heat insulation board and preparation method thereof - Google Patents

Gypsum-based light sound insulation prefabricated groove heat insulation board and preparation method thereof Download PDF

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CN114621026B
CN114621026B CN202110553096.4A CN202110553096A CN114621026B CN 114621026 B CN114621026 B CN 114621026B CN 202110553096 A CN202110553096 A CN 202110553096A CN 114621026 B CN114621026 B CN 114621026B
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gypsum
strength
phosphogypsum
insulation board
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CN114621026A (en
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张涛
薛绍秀
张骞
何松涛
胡宏
袁树华
陈翱翔
张文
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Wengfu Chemical Technology 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
    • C04B28/142—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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/88—Insulating elements for both heat and sound
    • E04B1/90—Insulating elements for both heat and sound slab-shaped
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Building Environments (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention relates to the field of heat-insulating boards, in particular to a gypsum-based light sound-insulating prefabricated groove heat-insulating board and a preparation method thereof. The preparation raw materials of the insulation board comprise 600-800 parts by weight of phosphogypsum-based alpha-type high-strength gypsum. The gypsum-based light sound insulation prefabricated groove heat insulation board prepared by the invention has the advantages of light weight, high strength, heat insulation, sound insulation, fire resistance and the like, provides an assembled building material for the ground, has better environmental protection benefit, social benefit and economic benefit, and has great significance for widening the development direction of the comprehensive utilization of phosphogypsum. The invention adopts phosphogypsum as the raw material of high-strength gypsum, which is an industrial byproduct, increases the application range of phosphogypsum, adopts phosphogypsum-based alpha-type high-strength gypsum with proper flexural strength and compressive strength as gypsum material, and combines proper amount of foaming agent, polyvinyl alcohol, rubber powder, water reducer and the like, thereby reducing the density of the insulation board and improving the strength of the insulation board.

Description

Gypsum-based light sound insulation prefabricated groove heat insulation board and preparation method thereof
Technical Field
The invention relates to the field of heat-insulating boards, in particular to a gypsum-based light sound-insulating prefabricated groove heat-insulating board and a preparation method thereof.
Background
The prefabricated groove heat-insulating board is a common name for a backfill-free, simple and dry floor heating module, the heat-insulating layer material is generally EPS or XPS, and at present, 90% of the floor heating heat-insulating layer material in China is recycled plastic, and a large amount of heavy metal and polyvinyl chloride (PVC) are filled. In the floor heating process, the polyvinyl chloride can generate toxic gases such as hydrogen chloride, chlorine and the like and cancerogenic substances such as hydrochloric acid, dioxin and the like. In addition, XPS, EPS flame retardant performance is relatively poor, will improve its flame retardant grade through adding HBCD (hexabromocyclododecane) flame retardant, but HBCD can slowly separate out from the board, can not only lead to flame retardant grade to reduce, and HBCD can cause chronic toxic effect to the human body through breathing moreover, especially to the influence of neuroendocrine system and human embryo early stage development great.
In addition, the ground bearing capacity of the XPS and EPS prefabricated groove heat-insulating plate is lower than that of the traditional ground, and the problem that the ground has higher load requirements is solved by checking the ground bearing capacity or adding a ground keel, and the heat storage effect is not as good as that of the traditional ground although the temperature is raised quickly.
CN111848088A discloses a gypsum-based fireproof door core board and a preparation method thereof, and the obtained a-type high-strength gypsum uses industrial byproduct phosphogypsum as a raw material, has the characteristics of good stability, high fire resistance, no corrosion to steel plates and high production efficiency, effectively solves the defects of the traditional magnesite material such as moisture absorption and low production efficiency, but has poor compressive strength, heat preservation and sound insulation capability, and cannot be used for prefabricated groove heat insulation boards.
Disclosure of Invention
In order to solve the problems, the first aspect of the invention provides a gypsum-based light sound insulation prefabricated groove heat insulation board, which is prepared from 600-800 parts by weight of phosphogypsum-based alpha-type high-strength gypsum, 45-70 parts by weight of foaming agent, 0.6-4 parts by weight of emulsion, 0.6-4 parts by weight of polyvinyl alcohol, 0.6-2.4 parts by weight of rubber powder, 0.3-8 parts by weight of water reducer, 0.6-4 parts by weight of fiber and 192-360 parts by weight of water; the dry density of the insulation board is less than or equal to 580kg/m 3 The compressive strength is more than or equal to 2.0MPa, and the heat conductivity coefficient is less than or equal to 0.12W/(m.K).
As a preferable technical scheme of the invention, the 2h flexural strength of the phosphogypsum-based alpha-type high-strength gypsum is more than or equal to 3.5Mpa, and the drying compressive strength is more than or equal to 35.0Mpa.
As a preferable technical scheme of the invention, the foaming agent is one or more selected from sulfonate foaming agents, protein foaming agents and polymer foaming agents.
As a preferred embodiment of the present invention, the concentration of the foaming agent is 1 to 2.5wt%.
As a preferable technical scheme of the invention, the emulsion is selected from one or more of tertiary vinyl acetate-acrylic emulsion, styrene-butadiene emulsion and vinyl acetate-acrylic emulsion.
As a preferable technical scheme of the invention, the polymerization monomer of the rubber powder comprises at least two of vinyl chloride, ethylene, vinyl laurate, vinyl acetate and methyl methacrylate.
As a preferable technical scheme of the invention, the water reducer is one or more selected from melamine water reducer, non-retarding polycarboxylic water reducer and sodium naphthalene sulfonate formaldehyde condensate.
As a preferred embodiment of the present invention, the fibers are selected from one or more of polyolefin fibers, polyester fibers, glass fibers, polyvinyl chloride fibers.
The second aspect of the invention provides a preparation method of the gypsum-based light sound insulation prefabricated groove heat insulation board, which comprises the following steps:
(1) Mixing water, fiber and a water reducing agent, adding phosphogypsum-based alpha-type high-strength gypsum, emulsion, polyvinyl alcohol and rubber powder, and stirring for 1-3min to obtain a premix;
(2) Foaming agent is made into foam, and the foam is added into the premix and stirred for 2 to 5 minutes to obtain mixed slurry;
(3) And adding the mixed slurry into a mould, forming and drying to obtain the heat-insulating plate.
As a preferable technical scheme of the invention, after the molding, standing for 30-90min, demolding, trimming and drying to obtain the heat insulation board.
Compared with the prior art, the invention has the following beneficial effects:
(1) The gypsum-based light sound insulation prefabricated groove heat insulation board prepared by the invention has the advantages of light weight, high strength, heat insulation, sound insulation, fire resistance and the like, provides an assembled building material for the ground, has better environmental protection benefit, social benefit and economic benefit, and has great significance for widening the development direction of the comprehensive utilization of phosphogypsum.
(2) The invention adopts phosphogypsum as the raw material of high-strength gypsum, which is an industrial byproduct, increases the application range of phosphogypsum, adopts phosphogypsum-based alpha-type high-strength gypsum with proper flexural strength and compressive strength as gypsum material, and combines proper amount of foaming agent, polyvinyl alcohol, rubber powder, water reducer and the like, thereby reducing the density of the insulation board and improving the strength of the insulation board.
(3) In order to obtain the foam type heat insulation board, a foaming agent is required to be added, the inventor finds that compared with the gypsum-based fireproof door core board applied by the applicant before, in order to improve the strength of the heat insulation board, the high-strength gypsum dosage is required to be improved, generally, in order to ensure the foaming effect, the gypsum dosage is increased, and the foaming agent dosage is also increased, but the inventor finds that when the foaming agent is more, tiny uniform foam is difficult to form and is easy to crush when the foaming agent is added into gypsum, and the foaming agent is added into the gypsum to be used as a non-water-soluble component together, and is matched with water-soluble components such as polyvinyl alcohol and a water reducer, the uniformity and stability of the foam added into the gypsum are ensured under the condition of low foaming agent dosage, and the crushing is reduced, so that the dried heat insulation board forms a light high-strength structure, and the heat insulation and sound insulation effects are promoted.
(4) And the inventors found that in order to ensure that the dry density of the insulation board is less than or equal to 580kg/m 3 The compressive strength is more than or equal to 2.0MPa, the heat conductivity coefficient is less than or equal to 0.12W/(m.K), the sound insulation effect is improved, the consumption of each raw material in the heat insulation board needs to be controlled, and when the consumption is selected improperly, the foam structure of the heat insulation board is not easy to stabilize and even, so that the performance of the heat insulation board is affected.
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 a gypsum-based light sound insulation prefabricated groove heat insulation board, which is prepared from the following raw materials, by weight, 600-800 parts of phosphogypsum-based alpha-type high-strength gypsum, 45-70 parts of foaming agent, 0.6-4 parts of emulsion, 0.6-4 parts of polyvinyl alcohol, 0.6-2.4 parts of rubber powder, 0.3-8 parts of water reducer, 0.6-4 parts of fiber and 192-360 parts of water.
Phosphogypsum-based alpha-type high-strength gypsum
The high-strength gypsum is gypsum with higher strength. The alpha-type high-strength gypsum is gypsum conforming to JC/T2038-2010 standard of alpha-type high-strength gypsum. Phosphogypsum is waste gypsum discharged in the wet-process phosphoric acid production process, and the phosphogypsum-based alpha-type high-strength gypsum used in the invention is prepared by taking the phosphogypsum after water washing as a raw material, adding a crystal conversion agent and then autoclaved, and is a common method without specific limitation.
In one embodiment, the phosphogypsum-based alpha-type high-strength gypsum has the 2h flexural strength of more than or equal to 3.5Mpa and the drying compressive strength of more than or equal to 35.0Mpa; the 2h flexural strength of phosphogypsum-based alpha-type high-strength gypsum is preferably more than or equal to 4Mpa, and the drying compressive strength is preferably more than or equal to 40Mpa; more preferably, the phosphogypsum-based alpha-type high-strength gypsum has the 2h flexural strength of 4-4.5 Mpa and the drying compressive strength of 40-45 Mpa. The test method of 2h flexural strength and drying compressive strength of phosphogypsum-based alpha-type high-strength gypsum is shown in JC/T2038-2010.
Foaming agent
In one embodiment, the foaming agent is selected from one or more of sulfonate foaming agents, protein foaming agents and polymer foaming agents; preferably, the foaming agent is a protein foaming agent or a polymer foaming agent. The protein foaming agent is a foaming agent comprising a vegetable protein or an animal protein as a foaming component, and examples of the polymer foaming agent include N-nitroso compounds such as N, N '-dinitroso pentamethylene tetramine, N' -dimethyl-N, N '-dinitroso terephthalamide and the like, azo compounds such as azobisisobutyronitrile, azodicarboxamide and barium azodicarboxylate and the like, chlorinated alkanes such as trichloromonofluoromethane, dichloromonofluoromethane and the like, hydrazine compounds such as p-toluenesulfonyl hydrazine, diphenyl sulfone-3, 3' -disulfonyl hydrazine, 4 '-oxybis (benzenesulfonyl hydrazide), allylbis (sulfonyl hydrazide) and the like, semicarbazide compounds such as p-toluenesulfonyl semicarbazide, 4' -oxybis (benzenesulfonyl semicarbazide) and the like, and triazole compounds such as 5-morpholino-1, 2,3, 4-thiatriazole and the like.
In order to promote foaming performance, the foaming agent is added into a foaming machine to prepare foam, and then added into raw materials such as gypsum, so that the foaming agent used in the invention is an aqueous solution of the foaming agent, the dosage of the aqueous solution of the foaming agent is controlled to be 45-70 parts, the concentration is controlled to be 1-2.5wt%, and the foaming agent is promoted to form fine foam. Wherein the concentration is the weight percentage of the foaming agent in the foaming agent aqueous solution. Preferably, the concentration of the foaming agent according to the invention is 1 to 2.5wt%, and there may be mentioned 1wt%, 1.1wt%, 1.2wt%, 1.3wt%, 1.4wt%, 1.5wt%, 1.6wt%, 1.7wt%, 1.8wt%, 1.9wt%, 2wt%, 2.1wt%, 2.2wt%, 2.3wt%, 2.4wt% and 2.5wt%.
Emulsion
In one embodiment, the emulsion of the present invention is selected from one or more of tertiary vinyl acetate emulsion, styrene-acrylic emulsion, styrene-butadiene emulsion and vinyl acetate emulsion, preferably tertiary vinyl acetate emulsion and styrene-acrylic emulsion. The styrene-acrylic emulsion is obtained by emulsion copolymerization of styrene and acrylate monomers, and the tertiary vinyl acetate-acrylic emulsion is obtained by emulsion copolymerization of vinyl acetate, vinyl versatate and acrylate monomers.
Polyvinyl alcohol
In one embodiment, the polyvinyl alcohol of the invention has a degree of polymerization of 1100 to 1700 and a mesh number of 100 to 150. The degree of polymerization is the average value of the number of repeating units contained in the macromolecular chain of the polymer. The mesh number is the number of pores per inch. The polyvinyl alcohol is cold water instant polyvinyl alcohol, and is easy to disperse in cold water to form capillary colloid.
Rubber powder
The rubber powder is powder formed by spray drying polymer emulsion, and can be quickly reduced into emulsion after contacting with water. In one embodiment, the polymeric monomer of the powder of the present invention comprises at least two of vinyl chloride, ethylene, vinyl laurate, vinyl acetate, methyl methacrylate. Examples of the vinyl-chloride-vinyl laurate terpolymer (E/VC/VL), vinyl acetate-ethylene-methyl methacrylate copolymer (VAc/E/MMA) and ethylene-vinyl acetate copolymer (E/VAc) are mentioned.
Preferably, the polymerized monomers of the rubber powder comprise vinyl chloride, ethylene and vinyl laurate.
Water reducing agent
The water reducing agent is an additive for reducing water consumption under the condition of maintaining slump basically unchanged. In one embodiment, the water reducer is one or more selected from melamine water reducer, non-retarding polycarboxylic acid water reducer and sodium naphthalene sulfonate formaldehyde condensate, and preferably the water reducer is selected from melamine water reducer and non-retarding polycarboxylic acid water reducer.
The melamine water reducer is sulfonated melamine formaldehyde resin which takes melamine as a raw material. The polycarboxylic acid water reducer is a polycarboxylic acid graft multipolymer obtained by copolymerizing olefin and unsaturated carboxylic acid. The polycarboxylic acid water reducer comprises a retarding polycarboxylic acid water reducer for slowing down the coagulation speed and a non-retarding polycarboxylic acid water reducer which has no influence on the coagulation speed. The invention uses non-retarding polycarboxylic acid water reducer.
Fiber
In one embodiment, the fibers of the present invention are selected from one or more of polyolefin fibers, polyester fibers, glass fibers, polyvinyl chloride fibers. Examples of the polyolefin fibers include polyethylene fibers, polypropylene fibers, and polybutylene fibers. Preferably polypropylene, polyester or glass fibers.
Preferably, the length of the fibers of the present invention is 10-30mm, and there may be mentioned 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm.
In one embodiment, the dry density of the insulation board is less than or equal to 580kg/m 3 The compressive strength is more than or equal to 2.0MPa, and the heat conductivity coefficient is less than or equal to 0.12W/(m.K). Preferably, the impact sound improvement amount of the heat insulation board is more than or equal to 10dB.
The second aspect of the invention provides a preparation method of the gypsum-based light sound insulation prefabricated groove heat insulation board, which comprises the following steps:
(1) Mixing water, fiber and a water reducing agent, adding phosphogypsum-based alpha-type high-strength gypsum, emulsion, polyvinyl alcohol and rubber powder, and stirring for 1-3min to obtain a premix;
(2) Foaming agent is made into foam, and the foam is added into the premix and stirred for 2 to 5 minutes to obtain mixed slurry;
(3) And adding the mixed slurry into a mould, forming and drying to obtain the heat-insulating plate.
In one embodiment, after the molding, standing for 30-90min, demolding, trimming and drying to obtain the heat insulation board. Trimming is to cut the rough edge on the top side of the die.
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 a gypsum-based lightweight sound insulation prefabricated groove insulation board and a preparation method thereof, wherein the preparation raw materials are commercially available, and dry density, compressive strength, heat conductivity coefficient and impact sound improvement amount of examples 1 to 3 are measured, wherein the dry density and compressive strength are measured according to JG/T266-2011 foam concrete; the heat conductivity coefficient is measured according to GB/T10294-2008 'measurement of steady-state thermal resistance and related characteristics of heat insulation materials'; the impact sound improvement amount is measured according to GB/T50121-2005 building Sound insulation evaluation Standard.
Example 1
The embodiment provides a gypsum-based light sound insulation prefabricated groove heat insulation board, which is prepared from the following raw materials in parts by weight, namely 600 parts of phosphogypsum-based alpha high-strength gypsum, 48 parts of protein foaming agent (2.5 wt% concentration), 0.6 parts of tertiary vinyl acetate-acrylic emulsion, 0.6 parts of polyvinyl alcohol, 2.4 parts of rubber powder, 6 parts of non-retarding polycarboxylic acid water reducer, 1.2 parts of polyester fiber and 192 parts of water.
The alpha-type high-strength gypsum is a product of Vat Fu chemical engineering Co., ltd, the 2-hour fracture resistance is 4.8Mpa, and the drying compressive strength is 41.0Mpa.
The emulsion is tertiary vinyl acetate-acrylic emulsion.
The polyvinyl alcohol is cold water instant polyvinyl alcohol, the polymerization degree is 1700, and the fineness is 150 meshes.
The rubber powder is vinyl chloride, ethylene and vinyl laurate copolymer rubber powder.
The fiber is polyester fiber, and the length is 19mm.
The example also provides a preparation method of the insulation board, which comprises the following steps: weighing 192 parts of water, 1.2 parts of fiber and 6 parts of water reducer, adding into a mixer, starting stirring, then adding 600 parts of phosphogypsum-based alpha-type high-strength gypsum, 0.6 part of emulsion, 0.6 part of polyvinyl alcohol and 2.4 parts of rubber powder, and stirring for 1min; then 48 parts of the prepared foaming agent (2.5 wt% concentration) was made into foam by a foaming machine and added to a special mixer, and stirred for 3min. Pouring the slurry into a mould, demoulding for 35min, and drying after demoulding to obtain the product.
The dry density of the gypsum-based light sound insulation prefabricated groove insulation board prepared by the invention is 488kg/m 3 The baking compression strength is 2.0MPa, the heat conductivity coefficient is 0.087W/(m.K), and the impact sound improvement quantity is 12.1dB.
Example 2
The embodiment provides a gypsum-based light sound insulation prefabricated groove heat insulation board, which is prepared from the following raw materials in parts by weight, namely 700 parts of phosphogypsum-based alpha high-strength gypsum, 58 parts of protein foaming agent (2 wt% concentration), 2.1 parts of styrene-acrylic emulsion, 4 parts of polyvinyl alcohol, 0.6 part of rubber powder, 4.2 parts of non-retarding polycarboxylic acid water reducer, 2.1 parts of polypropylene fiber and 245 parts of water.
The alpha-type high-strength gypsum is a product of Vat Fu chemical engineering Co., ltd, the 2-hour fracture resistance is 4.8Mpa, and the drying compressive strength is 41.0Mpa.
The emulsion is tertiary vinyl acetate-acrylic emulsion.
The polyvinyl alcohol is cold water instant polyvinyl alcohol, the polymerization degree is 1700, and the fineness is 150 meshes.
The rubber powder is vinyl chloride, ethylene and vinyl laurate copolymer rubber powder.
The fiber is polyester fiber, and the length is 19mm.
The example also provides a preparation method of the insulation board, which comprises the following steps: 245 parts of water, 2.1 parts of fiber and 4.2 parts of water reducer are weighed, a mixer is started to stir, then 700 parts of phosphogypsum-based alpha-type high-strength gypsum, 2.1 parts of emulsion, 4 parts of polyvinyl alcohol and 0.6 part of rubber powder are added, and stirring is carried out for 3min. Then 48 parts of the prepared foaming agent (2.5 wt% concentration) was made into foam by a foaming machine and added to a special mixer, and stirred for 4.5min. Pouring the slurry into a mould, demoulding for 60min, and drying after demoulding to obtain the product.
The dry density of the gypsum-based light sound insulation prefabricated groove insulation board prepared by the invention is 523kg/m 3 The drying compressive strength is 2.3MPa, and the heat conductivity coefficient is 0.099W/(mK), the amount of improvement in the impact sound was 11.6dB.
Example 3
The embodiment provides a gypsum-based light sound insulation prefabricated groove heat insulation board, which is prepared from the following raw materials in parts by weight, namely 800 parts of phosphogypsum-based alpha high-strength gypsum, 65 parts of polymer foaming agent (1 wt% concentration), 4 parts of tertiary vinyl acetate-acrylic emulsion, 0.6 part of polyvinyl alcohol, 0.6 part of rubber powder, 1.6 parts of melamine water reducer, 4 parts of polypropylene fiber and 344 parts of water.
The alpha-type high-strength gypsum is a product of Vat Fu chemical engineering Co., ltd, the 2-hour fracture resistance is 4.8Mpa, and the drying compressive strength is 41.0Mpa.
The emulsion is tertiary vinyl acetate-acrylic emulsion.
The polyvinyl alcohol is cold water instant polyvinyl alcohol, the polymerization degree is 1700, and the fineness is 150 meshes.
The rubber powder is vinyl chloride, ethylene and vinyl laurate copolymer rubber powder.
The fiber is polyester fiber, and the length is 19mm.
The example also provides a preparation method of the insulation board, which comprises the following steps: 344 parts of water, 4 parts of fiber and 1.6 parts of water reducer are weighed, a mixer is started to stir, then 800 parts of phosphogypsum-based alpha-type high-strength gypsum, 4 parts of emulsion, 0.6 part of polyvinyl alcohol and 0.6 part of rubber powder are added, and stirring is carried out for 2min. Then 65 parts of the prepared foaming agent (1 wt% concentration) was made into foam by a foaming machine and added to a special mixer and stirred for 4min. Pouring the slurry into a mould, demoulding for 80min, and drying after demoulding to obtain the product.
The gypsum-based light sound insulation prefabricated groove insulation board prepared by the invention has the dry density of 540kg/m 3 The baking compression strength is 2.5MPa, the heat conductivity coefficient is 0.109W/(m.K), and the impact sound improvement amount is 10.7dB.
As shown by test results, the heat-insulating board provided by the invention has the advantages of light weight, high strength, heat insulation, sound insulation, fire prevention and the like, can be used for a backfill-free, simple and dry floor heating module, and reduces the production cost.
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 (1)

1. The gypsum-based light sound insulation prefabricated groove heat insulation board is characterized by comprising, by weight, 600 parts of phosphogypsum-based alpha high-strength gypsum, 48 parts of 2.5wt% protein foaming agent, 0.6 part of tertiary vinyl acetate-acrylic emulsion, 0.6 part of polyvinyl alcohol, 2.4 parts of rubber powder, 6 parts of non-retarding polycarboxylic acid water reducer, 1.2 parts of polyester fiber and 192 parts of water;
the phosphogypsum-based alpha high-strength gypsum has the 2h bending resistance of 4.8MPa and the drying compressive strength of 41.0MPa;
the polyvinyl alcohol is cold water instant polyvinyl alcohol, the polymerization degree is 1700, and the fineness is 150 meshes;
the rubber powder is vinyl chloride, ethylene and vinyl laurate copolymer rubber powder;
the length of the polyester fiber is 19mm;
the preparation method of the insulation board comprises the following steps: weighing 192 parts of water, 1.2 parts of fiber and 6 parts of water reducer, adding into a mixer, starting stirring, then adding 600 parts of phosphogypsum-based alpha-type high-strength gypsum, 0.6 part of emulsion, 0.6 part of polyvinyl alcohol and 2.4 parts of rubber powder, and stirring for 1min; then, 48 parts of prepared 2.5wt% foaming agent is made into foam by a foaming machine and added into a special mixer to be stirred for 3min; pouring the slurry into a mold, demolding for 35min, and drying after demolding to obtain a product;
the dry density of the prepared gypsum-based light sound insulation prefabricated groove heat insulation board is 488kg/m 3 The baking compression strength is 2.0MPa, the heat conductivity coefficient is 0.087W/(m.K), and the impact sound improvement quantity is 12.1dB.
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