CN114230285A - Assembly type green building heat-insulation wall structure and assembly method thereof - Google Patents

Assembly type green building heat-insulation wall structure and assembly method thereof Download PDF

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CN114230285A
CN114230285A CN202111640843.4A CN202111640843A CN114230285A CN 114230285 A CN114230285 A CN 114230285A CN 202111640843 A CN202111640843 A CN 202111640843A CN 114230285 A CN114230285 A CN 114230285A
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parts
heat
formaldehyde resin
melamine formaldehyde
water
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CN114230285B (en
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刘霄
张婷婷
张进慧
李宁
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Shandong Huifu Construction Group Co ltd
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Shandong Huifu Construction Group 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
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
    • B28B11/245—Curing concrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/003—Methods for mixing
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/06—Quartz; Sand
    • C04B14/064—Silica aerogel
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/08—Diatomaceous earth
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/14—Minerals of vulcanic origin
    • C04B14/18—Perlite
    • C04B14/185—Perlite expanded
    • 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
    • C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B16/04—Macromolecular compounds
    • C04B16/06—Macromolecular compounds fibrous
    • C04B16/0675—Macromolecular compounds fibrous from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • 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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
    • 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
    • E04B1/38—Connections for building structures in general
    • 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
    • E04B1/38—Connections for building structures in general
    • E04B1/388—Separate connecting elements
    • 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
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • 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
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/78—Heat insulating elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • 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
    • 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
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    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/90—Passive houses; Double facade technology

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  • Engineering & Computer Science (AREA)
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  • Civil Engineering (AREA)
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  • Organic Chemistry (AREA)
  • Electromagnetism (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
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  • Thermal Insulation (AREA)

Abstract

The invention discloses an assembly type green building heat-insulating wall structure and an assembly method thereof, which comprises the steps of firstly, taking melamine formaldehyde resin and modified nano-silica as raw materials, and spinning to prepare melamine formaldehyde resin fibers; mixing and grinding the diatomite and the expanded perlite to obtain mixed powder, granulating, balling and calcining to obtain prefabricated particles; then adding melamine formaldehyde resin fibers and prefabricated particles into the silica sol for gelation to obtain a gel material; and finally, uniformly mixing the portland cement, the polyurethane foaming agent and the gel material, adding water, uniformly stirring and maintaining to obtain the cement. The heat-insulating wall body is high in structural strength, good in heat-insulating effect and suitable for assembly type green buildings.

Description

Assembly type green building heat-insulation wall structure and assembly method thereof
Technical Field
The invention relates to a heat-insulating wall structure, in particular to an assembly type green building heat-insulating wall structure and an assembly method thereof. Belongs to the technical field of green buildings.
Background
The assembled building has saved manpower resources and building material greatly, has reduced operations such as on-the-spot plastering, building a wall, receives weather effect less, has improved the construction progress greatly, reduces building rubbish and harmful gas and discharges, so the green building of assembled accords with present green theory, receives people's favor rather. The heat preservation of the wall is also an important factor influencing the energy saving of the building, so that the heat preservation wall structure is the core of the assembly type green building.
In order to realize wall heat insulation, a porous structure is mostly adopted in the prior art to block heat transfer, so that the strength of most heat insulation walls is relatively poor. Moreover, the porous structure has strict requirements on maintenance conditions, is difficult to control uniformly, and seriously influences the service life of the heat-insulating wall.
In addition, the existing heat-insulating wall body is complex in structure, poor in module connection stability and short in service life, and the falling risk exists in the using process. The specific assembly method of the heat-insulating wall structure is also very important.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an assembly type green building heat-insulating wall structure and an assembly method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of an assembly type green building heat-insulation wall structure comprises the following specific steps:
(1) firstly, taking melamine formaldehyde resin and modified nano silicon dioxide as raw materials, and spinning to prepare melamine formaldehyde resin fibers;
(2) mixing and grinding the diatomite and the expanded perlite to obtain mixed powder, granulating, balling and calcining to obtain prefabricated particles;
(3) then adding melamine formaldehyde resin fibers and prefabricated particles into the silica sol for gelation to obtain a gel material;
(4) and finally, uniformly mixing the portland cement, the polyurethane foaming agent and the gel material, adding water, uniformly stirring and maintaining to obtain the heat-insulating wall structure.
Preferably, in the step (1), the preparation method of the modified nano-silica comprises the following steps: adding 3-5 parts of gamma-aminopropyltriethoxysilane into 55-60 parts of absolute ethanol, uniformly stirring, adding 15-20 parts of nano-silica, carrying out ultrasonic oscillation treatment for 30-40 minutes at 300-500W, centrifuging, and taking precipitate to obtain amino modified nano-silica; and then ultrasonically dispersing the amino modified nano-silica in 55-60 parts of absolute ethyl alcohol, then adding 4-6 parts of diacetone acrylamide, stirring and reacting for 8-10 hours at 35-45 ℃, and centrifuging to obtain the precipitate, thus obtaining the modified nano-silica.
Preferably, the specific method of step (1) is as follows, in parts by weight: uniformly mixing 70-80 parts of melamine formaldehyde resin, 5-6 parts of modified nano silicon dioxide, 5-7 parts of sodium dodecyl benzene sulfonate and 75-85 parts of water, then carrying out ultrasonic oscillation treatment for 5-7 hours at the temperature of 60-65 ℃ under the condition of 500-600W to obtain spinning stock solution, finally carrying out spinning on the spinning stock solution through a spinning hole, and cooling in the air to obtain the melamine formaldehyde resin fiber.
Further preferably, the diameter of the spinneret orifice is 0.4-0.6 mm.
Preferably, the specific method of the step (2) comprises the following steps in parts by weight: firstly, mixing and grinding 20-25 parts of diatomite and 55-60 parts of expanded perlite to obtain mixed powder with the particle size of 5-10 microns, then adding water into the mixed powder to granulate into balls with the diameter of 0.5-1 mm, drying, transferring the balls into a rotary kiln to calcine, and obtaining prefabricated particles.
Further preferably, the calcination process conditions are as follows: calcining at 1200-1300 ℃ for 45-50 minutes.
Preferably, the specific method of the step (3) comprises the following steps in parts by weight: adding 5-7 parts of melamine formaldehyde resin fiber and 8-10 parts of prefabricated particles into 120-130 parts of silica sol, stirring until the mixture becomes gel, then sequentially soaking the gel in distilled water, ethanol solution with volume concentration of 50% and absolute ethanol for 24 hours respectively, and drying to obtain the gel material.
Preferably, in the step (3), the silica sol is prepared as follows: adding 1 part of ethyl orthosilicate and 1.1 part of absolute ethyl alcohol into 20-30 parts of water, adjusting the pH value to 2.5 by using a sulfuric acid solution with the mass concentration of 20-30%, stirring for 25-30 hours at the speed of 300-500 r/min, and adjusting the pH value to 6 by using an ammonia water solution with the mass concentration of 20-22%, thereby obtaining the silica sol.
Preferably, in the step (4), the mass ratio of the portland cement, the polyurethane foaming agent, the gel material and the water is 10: 0.8-1: 1-2: 28-30.
Preferably, in the step (4), the curing conditions are as follows: and curing in an autoclave at 1.5-2 MPa for 6-8 hours.
The assembled green building heat-insulating wall structure is obtained by the preparation method.
The assembling method of the assembly type green building heat-insulating wall body structure comprises the following specific steps: firstly, cutting the heat-insulating wall, arranging a keel mounting frame on the external wall of the building, enabling the keel to penetrate through the keel mounting frame so as to realize the connection of the heat-insulating wall and the external wall of the building, then bonding the heat-insulating wall on the keel through premixed mortar, and then fixing by using a plastic rivet bolt, thus finishing the assembly of the structure of the heat-insulating wall; the premixed mortar is prepared by mixing the following components in parts by weight: 50-60 parts of ordinary portland cement, 30-40 parts of quartz sand, 3-5 parts of polymer resin powder, 5-8 parts of prefabricated particles and 60-65 parts of water.
Preferably, the outer side surface of the heat insulation wall body is provided with 2-3 layers of dovetail groove structures, and the included angle between the dovetail part of each dovetail groove structure and the outer side surface of the heat insulation wall body is 40-50 degrees.
Preferably, the preformed particles are prepared by the following method in parts by weight: firstly, mixing and grinding 20-25 parts of diatomite and 55-60 parts of expanded perlite to obtain mixed powder with the particle size of 5-10 microns, then adding water into the mixed powder to granulate into balls with the diameter of 0.5-1 mm, drying, transferring the balls into a rotary kiln to calcine, and obtaining prefabricated particles.
Further preferably, the calcination process conditions are as follows: calcining at 1200-1300 ℃ for 45-50 minutes.
The invention has the beneficial effects that:
the invention firstly uses melamine formaldehyde resin and modified nano silicon dioxide as raw materials to prepare melamine formaldehyde resin fiber by spinning; mixing and grinding the diatomite and the expanded perlite to obtain mixed powder, granulating, balling and calcining to obtain prefabricated particles; then adding melamine formaldehyde resin fibers and prefabricated particles into the silica sol for gelation to obtain a gel material; and finally, uniformly mixing the portland cement, the polyurethane foaming agent and the gel material, adding water, uniformly stirring and maintaining to obtain the heat-insulating wall structure. The heat-insulating wall body is high in structural strength, good in heat-insulating effect and suitable for assembly type green buildings.
The assembly method of the heat-insulating wall structure is simple, firstly, the heat-insulating wall is cut, a keel mounting frame is arranged on the external wall of the building, a keel penetrates through the keel mounting frame to realize the connection of the heat-insulating wall and the external wall of the building, then, the heat-insulating wall is bonded on the keel through premixed mortar, and then, the heat-insulating wall structure is fixed by plastic rivets and bolts, so that the assembly of the heat-insulating wall structure can be completed; the premixed mortar is prepared by mixing ordinary portland cement, quartz sand, polymer resin adhesive powder and prefabricated particles, and the use of the prefabricated mortar can ensure the assembly effect of the heat-insulating wall structure so as to exert the strength and the heat-insulating effect of the heat-insulating wall structure.
The method comprises the steps of firstly, carrying out modification treatment on nano-silica by utilizing gamma-aminopropyltriethoxysilane to obtain amino modified nano-silica, and then reacting the amino modified nano-silica with diacetone acrylamide to obtain the modified nano-silica. The modified nano silicon dioxide and the melamine formaldehyde resin have good compatibility, and the prepared fiber has the effects of enhancing and improving the strength of the heat-insulating wall. The prefabricated particles made of the diatomite and the expanded perlite have rich pores, and have the function of enhancing and simultaneously cooperate with the silicon dioxide gel to improve the heat insulation effect of the product.
Detailed Description
The present invention will be further illustrated by the following examples, which are intended to be merely illustrative and not limitative.
Example 1
A preparation method of an assembly type green building heat-insulation wall structure comprises the following specific steps:
(1) firstly, taking melamine formaldehyde resin and modified nano silicon dioxide as raw materials, and spinning to prepare melamine formaldehyde resin fibers;
(2) mixing and grinding the diatomite and the expanded perlite to obtain mixed powder, granulating, balling and calcining to obtain prefabricated particles;
(3) then adding melamine formaldehyde resin fibers and prefabricated particles into the silica sol for gelation to obtain a gel material;
(4) and finally, uniformly mixing the portland cement, the polyurethane foaming agent and the gel material, adding water, uniformly stirring and maintaining to obtain the heat-insulating wall structure.
In the step (1), the preparation method of the modified nano silicon dioxide comprises the following steps: adding 3kg of gamma-aminopropyltriethoxysilane into 60kg of absolute ethanol, uniformly stirring, adding 15kg of nano-silica, carrying out 500W ultrasonic oscillation treatment for 30 minutes, centrifuging, and taking precipitate to obtain amino modified nano-silica; and then ultrasonically dispersing the amino modified nano silicon dioxide in 60kg of absolute ethyl alcohol, then adding 4kg of diacetone acrylamide, stirring and reacting for 8 hours at 45 ℃, centrifuging and taking precipitate to obtain the modified nano silicon dioxide.
The specific method of the step (1) is as follows: uniformly mixing 80kg of melamine formaldehyde resin, 5kg of modified nano silicon dioxide, 7kg of sodium dodecyl benzene sulfonate and 75kg of water, carrying out 500W ultrasonic oscillation treatment for 7 hours at the temperature of 65 ℃ to obtain a spinning stock solution, finally carrying out spinning on the spinning stock solution through a spinning hole, and cooling in the air to obtain the melamine formaldehyde resin fiber. The diameter of the spinneret orifice is 0.4 mm.
The specific method of the step (2) is as follows: firstly, mixing and grinding 25kg of diatomite and 55kg of expanded perlite to obtain mixed powder with the particle size of 10 microns, then adding water into the mixed powder to granulate into balls with the diameter of 0.5mm, drying, and transferring the balls into a rotary kiln to calcine to obtain prefabricated particles.
The calcination process conditions are as follows: calcining at 1300 ℃ for 45 minutes.
The specific method of the step (3) is as follows: adding 7kg of melamine formaldehyde resin fiber and 8kg of prefabricated particles into 130kg of silica sol, stirring until the mixture becomes gel, then sequentially soaking the gel in distilled water, ethanol solution with volume concentration of 50% and absolute ethanol for 24 hours respectively, and drying to obtain the gel material.
In the step (3), the preparation method of the silica sol is as follows: adding 1kg of ethyl orthosilicate and 1.1kg of absolute ethyl alcohol into 20kg of water, adjusting the pH to 2.5 by using a sulfuric acid solution with the mass concentration of 30%, stirring at 300r/min for 30 hours, and adjusting the pH to 6 by using an ammonia water solution with the mass concentration of 20%, thereby obtaining the silica sol.
In the step (4), the mass ratio of the portland cement, the polyurethane foaming agent, the gel material and the water is 10: 1: 1: 30.
in the step (4), the curing conditions are as follows: curing for 8 hours in a 1.5MPa autoclave reactor.
An assembly method of an assembly type green building heat-insulating wall structure comprises the following specific steps: firstly, cutting the heat-insulating wall, arranging a keel mounting frame on the external wall of the building, enabling the keel to penetrate through the keel mounting frame so as to realize the connection of the heat-insulating wall and the external wall of the building, then bonding the heat-insulating wall on the keel through premixed mortar, and then fixing by using a plastic rivet bolt, thus finishing the assembly of the structure of the heat-insulating wall; the premixed mortar is prepared by mixing the following components: 50kg of ordinary portland cement, 40kg of quartz sand, 3kg of polymer resin powder, 8kg of prefabricated particles and 60kg of water.
The outer side surface of the heat insulation wall body is provided with 2 layers of dovetail groove structures, and the included angle between the dovetail part of each dovetail groove structure and the outer side surface of the heat insulation wall body is 50 degrees.
The preparation method of the prefabricated particles comprises the following steps: firstly, 20kg of diatomite and 60kg of expanded perlite are mixed and ground to obtain mixed powder with the particle size of 5 microns, then the mixed powder is added with water to be granulated into balls with the diameter of 1mm, and the balls are dried and transferred to a rotary kiln to be calcined to obtain prefabricated particles.
The calcination process conditions are as follows: calcining at 1200 ℃ for 50 minutes.
Example 2
A preparation method of an assembly type green building heat-insulation wall structure comprises the following specific steps:
(1) firstly, taking melamine formaldehyde resin and modified nano silicon dioxide as raw materials, and spinning to prepare melamine formaldehyde resin fibers;
(2) mixing and grinding the diatomite and the expanded perlite to obtain mixed powder, granulating, balling and calcining to obtain prefabricated particles;
(3) then adding melamine formaldehyde resin fibers and prefabricated particles into the silica sol for gelation to obtain a gel material;
(4) and finally, uniformly mixing the portland cement, the polyurethane foaming agent and the gel material, adding water, uniformly stirring and maintaining to obtain the heat-insulating wall structure.
In the step (1), the preparation method of the modified nano silicon dioxide comprises the following steps: adding 5kg of gamma-aminopropyltriethoxysilane into 55kg of absolute ethanol, uniformly stirring, adding 20kg of nano-silica, carrying out ultrasonic oscillation treatment at 300W for 40 minutes, centrifuging, and taking precipitate to obtain amino modified nano-silica; and then ultrasonically dispersing the amino modified nano silicon dioxide in 55kg of absolute ethyl alcohol, then adding 6kg of diacetone acrylamide, stirring and reacting for 10 hours at 35 ℃, centrifuging and taking precipitate to obtain the modified nano silicon dioxide.
The specific method of the step (1) is as follows: uniformly mixing 70kg of melamine formaldehyde resin, 6kg of modified nano silicon dioxide, 5kg of sodium dodecyl benzene sulfonate and 85kg of water, then carrying out ultrasonic oscillation treatment for 5 hours at the temperature of 60 ℃ by 600W to obtain a spinning stock solution, finally carrying out spinning on the spinning stock solution through a spinning hole, and cooling in the air to obtain the melamine formaldehyde resin fiber. The diameter of the spinneret orifice is 0.6 mm.
The specific method of the step (2) is as follows: firstly, 20kg of diatomite and 60kg of expanded perlite are mixed and ground to obtain mixed powder with the particle size of 5 microns, then the mixed powder is added with water to be granulated into balls with the diameter of 1mm, and the balls are dried and transferred to a rotary kiln to be calcined to obtain prefabricated particles.
The calcination process conditions are as follows: calcining at 1200 ℃ for 50 minutes.
The specific method of the step (3) is as follows: firstly, adding 5kg of melamine formaldehyde resin fiber and 10kg of prefabricated particles into 120kg of silica sol, stirring until the mixture becomes gel, then sequentially soaking the gel in distilled water, ethanol solution with volume concentration of 50% and absolute ethanol for 24 hours respectively, and drying to obtain the gel material.
In the step (3), the preparation method of the silica sol is as follows: adding 1kg of ethyl orthosilicate and 1.1kg of absolute ethyl alcohol into 30kg of water, adjusting the pH to 2.5 by using a sulfuric acid solution with the mass concentration of 20%, stirring at 500r/min for 25 hours, and adjusting the pH to 6 by using an ammonia water solution with the mass concentration of 22%, thereby obtaining the silica sol.
In the step (4), the mass ratio of the portland cement, the polyurethane foaming agent, the gel material and the water is 10: 0.8: 2: 28.
In the step (4), the curing conditions are as follows: and curing for 6 hours in a 2MPa autoclave.
An assembly method of an assembly type green building heat-insulating wall structure comprises the following specific steps: firstly, cutting the heat-insulating wall, arranging a keel mounting frame on the external wall of the building, enabling the keel to penetrate through the keel mounting frame so as to realize the connection of the heat-insulating wall and the external wall of the building, then bonding the heat-insulating wall on the keel through premixed mortar, and then fixing by using a plastic rivet bolt, thus finishing the assembly of the structure of the heat-insulating wall; the premixed mortar is prepared by mixing the following components: 60kg of ordinary portland cement, 30kg of quartz sand, 5kg of polymer resin powder, 5kg of prefabricated particles and 65kg of water.
The outer side surface of the heat insulation wall body is provided with 3 layers of dovetail groove structures, and the included angle between the dovetail part of each dovetail groove structure and the outer side surface of the heat insulation wall body is 40 degrees.
The preparation method of the prefabricated particles comprises the following steps: firstly, 20kg of diatomite and 60kg of expanded perlite are mixed and ground to obtain mixed powder with the particle size of 5 microns, then the mixed powder is added with water to be granulated into balls with the diameter of 1mm, and the balls are dried and transferred to a rotary kiln to be calcined to obtain prefabricated particles.
The calcination process conditions are as follows: calcining at 1200 ℃ for 50 minutes.
Example 3
A preparation method of an assembly type green building heat-insulation wall structure comprises the following specific steps:
(1) firstly, taking melamine formaldehyde resin and modified nano silicon dioxide as raw materials, and spinning to prepare melamine formaldehyde resin fibers;
(2) mixing and grinding the diatomite and the expanded perlite to obtain mixed powder, granulating, balling and calcining to obtain prefabricated particles;
(3) then adding melamine formaldehyde resin fibers and prefabricated particles into the silica sol for gelation to obtain a gel material;
(4) and finally, uniformly mixing the portland cement, the polyurethane foaming agent and the gel material, adding water, uniformly stirring and maintaining to obtain the heat-insulating wall structure.
In the step (1), the preparation method of the modified nano silicon dioxide comprises the following steps: adding 4kg of gamma-aminopropyltriethoxysilane into 58kg of absolute ethanol, uniformly stirring, adding 18kg of nano-silica, carrying out 400W ultrasonic oscillation treatment for 35 minutes, centrifuging, and taking precipitate to obtain amino modified nano-silica; and then ultrasonically dispersing the amino modified nano silicon dioxide in 58kg of absolute ethyl alcohol, then adding 5kg of diacetone acrylamide, stirring and reacting for 9 hours at 40 ℃, centrifuging and taking the precipitate to obtain the modified nano silicon dioxide.
The specific method of the step (1) is as follows: firstly, uniformly mixing 75kg of melamine formaldehyde resin, 5.5kg of modified nano silicon dioxide, 6kg of sodium dodecyl benzene sulfonate and 80kg of water, then carrying out ultrasonic oscillation treatment for 6 hours at 63 ℃ under 600W to obtain spinning stock solution, finally carrying out spinning on the spinning stock solution through a spinning hole, and cooling in the air to obtain the melamine formaldehyde resin fiber. The diameter of the spinneret orifice is 0.5 mm.
The specific method of the step (2) is as follows: firstly, 22kg of diatomite and 58kg of expanded perlite are mixed and ground to obtain mixed powder with the particle size of 8 mu m, then the mixed powder is added with water to be granulated into balls with the diameter of 0.8mm, and the balls are dried and transferred to a rotary kiln to be calcined to obtain prefabricated particles.
The calcination process conditions are as follows: calcining at 1250 ℃ for 48 minutes.
The specific method of the step (3) is as follows: adding 6kg of melamine formaldehyde resin fiber and 9kg of prefabricated particles into 125kg of silica sol, stirring until the mixture becomes gel, then sequentially soaking the gel in distilled water, ethanol solution with volume concentration of 50% and absolute ethyl alcohol for 24 hours respectively, and drying to obtain the gel material.
In the step (3), the preparation method of the silica sol is as follows: adding 1kg of ethyl orthosilicate and 1.1kg of absolute ethyl alcohol into 25kg of water, adjusting the pH to 2.5 by using a 25% sulfuric acid solution with a mass concentration, stirring at 400r/min for 28 hours, and adjusting the pH to 6 by using a 21% ammonia water solution with a mass concentration to obtain the silica sol.
In the step (4), the mass ratio of the portland cement, the polyurethane foaming agent, the gel material and the water is 10: 0.9: 1.5: 29.
In the step (4), the curing conditions are as follows: and curing for 7 hours in a 2MPa autoclave.
An assembly method of an assembly type green building heat-insulating wall structure comprises the following specific steps: firstly, cutting the heat-insulating wall, arranging a keel mounting frame on the external wall of the building, enabling the keel to penetrate through the keel mounting frame so as to realize the connection of the heat-insulating wall and the external wall of the building, then bonding the heat-insulating wall on the keel through premixed mortar, and then fixing by using a plastic rivet bolt, thus finishing the assembly of the structure of the heat-insulating wall; the premixed mortar is prepared by mixing the following components: 55kg of ordinary portland cement, 35kg of quartz sand, 4kg of polymer resin powder, 7kg of prefabricated particles and 62kg of water.
The outer side surface of the heat insulation wall body is provided with 3 layers of dovetail groove structures, and the included angle between the dovetail part of each dovetail groove structure and the outer side surface of the heat insulation wall body is 45 degrees.
The preparation method of the prefabricated particles comprises the following steps: firstly, 22kg of diatomite and 58kg of expanded perlite are mixed and ground to obtain mixed powder with the particle size of 8 mu m, then the mixed powder is added with water to be granulated into balls with the diameter of 0.8mm, and the balls are dried and transferred to a rotary kiln to be calcined to obtain prefabricated particles.
The calcination process conditions are as follows: calcining at 1250 ℃ for 48 minutes.
Comparative example 1
A preparation method of an assembly type green building heat-insulation wall structure comprises the following specific steps:
(1) firstly, taking melamine formaldehyde resin and nano silicon dioxide as raw materials, and spinning to prepare melamine formaldehyde resin fibers;
(2) mixing and grinding the diatomite and the expanded perlite to obtain mixed powder, granulating, balling and calcining to obtain prefabricated particles;
(3) then adding melamine formaldehyde resin fibers and prefabricated particles into the silica sol for gelation to obtain a gel material;
(4) and finally, uniformly mixing the portland cement, the polyurethane foaming agent and the gel material, adding water, uniformly stirring and maintaining to obtain the heat-insulating wall structure.
The specific method of the step (1) is as follows: uniformly mixing 80kg of melamine formaldehyde resin, 5kg of nano silicon dioxide, 7kg of sodium dodecyl benzene sulfonate and 75kg of water, carrying out 500W ultrasonic oscillation treatment for 7 hours at the temperature of 65 ℃ to obtain a spinning stock solution, carrying out spinning on the spinning stock solution through a spinning hole, and cooling in the air to obtain the melamine formaldehyde resin fiber. The diameter of the spinneret orifice is 0.4 mm.
The specific method of the step (2) is as follows: firstly, mixing and grinding 25kg of diatomite and 55kg of expanded perlite to obtain mixed powder with the particle size of 10 microns, then adding water into the mixed powder to granulate into balls with the diameter of 0.5mm, drying, and transferring the balls into a rotary kiln to calcine to obtain prefabricated particles.
The calcination process conditions are as follows: calcining at 1300 ℃ for 45 minutes.
The specific method of the step (3) is as follows: adding 7kg of melamine formaldehyde resin fiber and 8kg of prefabricated particles into 130kg of silica sol, stirring until the mixture becomes gel, then sequentially soaking the gel in distilled water, ethanol solution with volume concentration of 50% and absolute ethanol for 24 hours respectively, and drying to obtain the gel material.
In the step (3), the preparation method of the silica sol is as follows: adding 1kg of ethyl orthosilicate and 1.1kg of absolute ethyl alcohol into 20kg of water, adjusting the pH to 2.5 by using a sulfuric acid solution with the mass concentration of 30%, stirring at 300r/min for 30 hours, and adjusting the pH to 6 by using an ammonia water solution with the mass concentration of 20%, thereby obtaining the silica sol.
In the step (4), the mass ratio of the portland cement, the polyurethane foaming agent, the gel material and the water is 10: 1: 1: 30.
in the step (4), the curing conditions are as follows: curing for 8 hours in a 1.5MPa autoclave reactor.
An assembly method of an assembly type green building heat-insulating wall structure comprises the following specific steps: firstly, cutting the heat-insulating wall, arranging a keel mounting frame on the external wall of the building, enabling the keel to penetrate through the keel mounting frame so as to realize the connection of the heat-insulating wall and the external wall of the building, then bonding the heat-insulating wall on the keel through premixed mortar, and then fixing by using a plastic rivet bolt, thus finishing the assembly of the structure of the heat-insulating wall; the premixed mortar is prepared by mixing the following components: 50kg of ordinary portland cement, 40kg of quartz sand, 3kg of polymer resin powder, 8kg of prefabricated particles and 60kg of water.
The outer side surface of the heat insulation wall body is provided with 2 layers of dovetail groove structures, and the included angle between the dovetail part of each dovetail groove structure and the outer side surface of the heat insulation wall body is 50 degrees.
The preparation method of the prefabricated particles comprises the following steps: firstly, 20kg of diatomite and 60kg of expanded perlite are mixed and ground to obtain mixed powder with the particle size of 5 microns, then the mixed powder is added with water to be granulated into balls with the diameter of 1mm, and the balls are dried and transferred to a rotary kiln to be calcined to obtain prefabricated particles.
The calcination process conditions are as follows: calcining at 1200 ℃ for 50 minutes.
Comparative example 2
A preparation method of an assembly type green building heat-insulation wall structure comprises the following specific steps:
(1) firstly, taking melamine formaldehyde resin and modified nano silicon dioxide as raw materials, and spinning to prepare melamine formaldehyde resin fibers;
(2) then adding melamine formaldehyde resin fiber into the silica sol for gelation to obtain a gel material;
(3) and finally, uniformly mixing the portland cement, the polyurethane foaming agent and the gel material, adding water, uniformly stirring and maintaining to obtain the heat-insulating wall structure.
In the step (1), the preparation method of the modified nano silicon dioxide comprises the following steps: adding 3kg of gamma-aminopropyltriethoxysilane into 60kg of absolute ethanol, uniformly stirring, adding 15kg of nano-silica, carrying out 500W ultrasonic oscillation treatment for 30 minutes, centrifuging, and taking precipitate to obtain amino modified nano-silica; and then ultrasonically dispersing the amino modified nano silicon dioxide in 60kg of absolute ethyl alcohol, then adding 4kg of diacetone acrylamide, stirring and reacting for 8 hours at 45 ℃, centrifuging and taking precipitate to obtain the modified nano silicon dioxide.
The specific method of the step (1) is as follows: uniformly mixing 80kg of melamine formaldehyde resin, 5kg of modified nano silicon dioxide, 7kg of sodium dodecyl benzene sulfonate and 75kg of water, carrying out 500W ultrasonic oscillation treatment for 7 hours at the temperature of 65 ℃ to obtain a spinning stock solution, finally carrying out spinning on the spinning stock solution through a spinning hole, and cooling in the air to obtain the melamine formaldehyde resin fiber. The diameter of the spinneret orifice is 0.4 mm.
The specific method of the step (2) is as follows: adding 7kg of melamine formaldehyde resin fiber into 130kg of silica sol, stirring until the melamine formaldehyde resin fiber becomes gel, then sequentially soaking the gel in distilled water, ethanol solution with volume concentration of 50% and absolute ethanol for 24 hours respectively, and drying to obtain the gel material.
In the step (2), the preparation method of the silica sol is as follows: adding 1kg of ethyl orthosilicate and 1.1kg of absolute ethyl alcohol into 20kg of water, adjusting the pH to 2.5 by using a sulfuric acid solution with the mass concentration of 30%, stirring at 300r/min for 30 hours, and adjusting the pH to 6 by using an ammonia water solution with the mass concentration of 20%, thereby obtaining the silica sol.
In the step (3), the mass ratio of the portland cement, the polyurethane foaming agent, the gel material and the water is 10: 1: 1: 30.
in the step (3), the curing conditions are as follows: curing for 8 hours in a 1.5MPa autoclave reactor.
An assembly method of an assembly type green building heat-insulating wall structure comprises the following specific steps: firstly, cutting the heat-insulating wall, arranging a keel mounting frame on the external wall of the building, enabling the keel to penetrate through the keel mounting frame so as to realize the connection of the heat-insulating wall and the external wall of the building, then bonding the heat-insulating wall on the keel through premixed mortar, and then fixing by using a plastic rivet bolt, thus finishing the assembly of the structure of the heat-insulating wall; the premixed mortar is prepared by mixing the following components: 50kg of ordinary portland cement, 40kg of quartz sand, 3kg of polymer resin powder and 60kg of water.
The outer side surface of the heat insulation wall body is provided with 2 layers of dovetail groove structures, and the included angle between the dovetail part of each dovetail groove structure and the outer side surface of the heat insulation wall body is 50 degrees.
Test examples
The performance test of the thermal insulation wall structures obtained in examples 1-3 and comparative examples 1 and 2 is carried out, and the results are shown in table 1.
Wherein, the heat preservation performance is referred to GB/T10294-.
TABLE 1 Performance test results
Thermal conductivity (W/(m.K)) Compressive strength (MPa)
Example 1 0.011 8.3
Example 2 0.012 8.4
Example 3 0.009 8.6
Comparative example 1 0.011 7.4
Comparative example 2 0.158 6.3
As can be seen from Table 1, the thermal insulation wall structures obtained in examples 1 to 3 have low thermal conductivity, high compressive strength, high strength and good thermal insulation effect.
The comparative example 1 replaces the modified nano-silica with the nano-silica, the comparative example 2 omits the prefabricated particles, the strength of the obtained thermal insulation wall structure is obviously deteriorated, and the thermal insulation effect of the comparative example 2 is deteriorated, which shows that the addition of the modified nano-silica in the melamine formaldehyde resin fiber and the prefabricated particles act synergistically to improve the strength of the product, and the prefabricated particles and the silica gel act synergistically to improve the thermal insulation effect of the product.
Although the present invention has been described with reference to the specific embodiments, it is not intended to limit the scope of the present invention, and various modifications and variations can be made by those skilled in the art without inventive changes based on the technical solution of the present invention.

Claims (10)

1. A preparation method of an assembly type green building heat-insulation wall structure is characterized by comprising the following specific steps:
(1) firstly, taking melamine formaldehyde resin and modified nano silicon dioxide as raw materials, and spinning to prepare melamine formaldehyde resin fibers;
(2) mixing and grinding the diatomite and the expanded perlite to obtain mixed powder, granulating, balling and calcining to obtain prefabricated particles;
(3) then adding melamine formaldehyde resin fibers and prefabricated particles into the silica sol for gelation to obtain a gel material;
(4) and finally, uniformly mixing the portland cement, the polyurethane foaming agent and the gel material, adding water, uniformly stirring and maintaining to obtain the heat-insulating wall structure.
2. The preparation method according to claim 1, wherein in the step (1), the modified nano silica is prepared by the following steps in parts by weight: adding 3-5 parts of gamma-aminopropyltriethoxysilane to 55-60 parts of absolute ethanol, uniformly stirring, adding 15-20 parts of nano-silica, carrying out ultrasonic oscillation treatment for 30-40 minutes at 300-500W, centrifuging, and taking precipitate to obtain amino modified nano-silica; and then ultrasonically dispersing the amino modified nano-silica in 55-60 parts of absolute ethyl alcohol, then adding 4-6 parts of diacetone acrylamide, stirring and reacting for 8-10 hours at 35-45 ℃, and centrifuging to obtain the precipitate, thus obtaining the modified nano-silica.
3. The preparation method according to claim 1, wherein the specific method of step (1) is as follows, in parts by weight: uniformly mixing 70-80 parts of melamine formaldehyde resin, 5-6 parts of modified nano silicon dioxide, 5-7 parts of sodium dodecyl benzene sulfonate and 75-85 parts of water, then carrying out ultrasonic oscillation treatment for 5-7 hours at the temperature of 60-65 ℃ under the condition of 500-600W to obtain spinning stock solution, finally carrying out spinning on the spinning stock solution through a spinning hole, and cooling in the air to obtain the melamine formaldehyde resin fiber.
4. The preparation method according to claim 1, wherein the specific method of the step (2) comprises the following steps in parts by weight: firstly, mixing and grinding 20-25 parts of diatomite and 55-60 parts of expanded perlite to obtain mixed powder with the particle size of 5-10 microns, then adding water into the mixed powder to granulate into balls with the diameter of 0.5-1 mm, drying, transferring the balls into a rotary kiln to calcine, and obtaining prefabricated particles.
5. The preparation method according to claim 1, wherein the specific method of step (3) is as follows, in parts by weight: adding 5-7 parts of melamine formaldehyde resin fiber and 8-10 parts of prefabricated particles into 120-130 parts of silica sol, stirring until the mixture becomes gel, then sequentially soaking the gel in distilled water, ethanol solution with volume concentration of 50% and absolute ethanol for 24 hours respectively, and drying to obtain the gel material.
6. The method according to claim 1, wherein the silica sol is prepared in the step (3) as follows: adding 1 part of ethyl orthosilicate and 1.1 part of absolute ethyl alcohol into 20-30 parts of water, adjusting the pH value to 2.5 by using a sulfuric acid solution with the mass concentration of 20-30%, stirring at 300-500 r/min for 25-30 hours, and adjusting the pH value to 6 by using an ammonia water solution with the mass concentration of 20-22%, thereby obtaining the silica sol.
7. The preparation method according to claim 1, wherein in the step (4), the mass ratio of the portland cement, the polyurethane foaming agent, the gel material and the water is 10: 0.8-1: 1-2: 28-30.
8. The production method according to claim 1, wherein in the step (4), the curing conditions are: and curing in an autoclave at 1.5-2 MPa for 6-8 hours.
9. An assembled green building thermal insulation wall structure obtained by the preparation method of any one of claims 1 to 8.
10. The assembling method of the assembled green building thermal insulation wall structure of claim 9, which is characterized by comprising the following steps: firstly, cutting the heat-insulating wall, arranging a keel mounting frame on the external wall of the building, enabling the keel to penetrate through the keel mounting frame so as to realize the connection of the heat-insulating wall and the external wall of the building, then bonding the heat-insulating wall on the keel through premixed mortar, and then fixing by using a plastic rivet bolt, thus finishing the assembly of the structure of the heat-insulating wall; the premixed mortar is prepared by mixing the following components in parts by weight: 50-60 parts of ordinary portland cement, 30-40 parts of quartz sand, 3-5 parts of polymer resin powder, 5-8 parts of prefabricated particles and 60-65 parts of water.
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