CN111943615A - Heat-insulating wall material and preparation method thereof - Google Patents

Heat-insulating wall material and preparation method thereof Download PDF

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Publication number
CN111943615A
CN111943615A CN202010756572.8A CN202010756572A CN111943615A CN 111943615 A CN111943615 A CN 111943615A CN 202010756572 A CN202010756572 A CN 202010756572A CN 111943615 A CN111943615 A CN 111943615A
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parts
heat
wall material
insulating wall
cement
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Inventor
刘泽俊
唐洲洋
周杰
孙华圣
李保亮
丁昱琪
王雪飞
赵军
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Huaiyin Institute of Technology
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Huaiyin Institute of Technology
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/10Lime cements or magnesium oxide cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00Use 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
    • C04B14/02Granular materials, e.g. microballoons
    • C04B14/04Silica-rich materials; Silicates
    • C04B14/22Glass ; Devitrified glass
    • C04B14/24Glass ; Devitrified glass porous, e.g. foamed glass
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00Use 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
    • C04B14/38Fibrous materials; Whiskers
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04Waste materials; Refuse
    • C04B18/14Waste materials; Refuse from metallurgical processes
    • C04B18/141Slags
    • C04B18/142Steelmaking slags, converter slags
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04Waste materials; Refuse
    • C04B18/18Waste materials; Refuse organic
    • C04B18/24Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
    • C04B18/248Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork from specific plants, e.g. hemp fibres
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/12Nitrogen containing compounds organic derivatives of hydrazine
    • C04B24/14Peptides; Proteins; Derivatives thereof
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20Mortars, concrete or artificial stone characterised by specific physical values for the density
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32Mortars, 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a heat-insulating wall material and a preparation method thereof, wherein the heat-insulating wall material comprises the following components: 23-33 parts of cement, 30-40 parts of lime, 10-20 parts of fly ash, 30-40 parts of steel slag powder, 90-150 parts of recycled aggregate, 1-5 parts of cement foaming agent, 10-20 parts of expanded and vitrified micro-beads, 10-20 parts of thermosetting phenolic resin, 65-80 parts of water, 20-47 parts of straw fiber and 10-15 parts of brucite fiber. The invention utilizes the characteristics of materials, realizes the environmental protection utilization of materials, ensures that the prepared wall has better heat insulation performance and excellent corrosion resistance, and greatly improves the application range of the heat insulation wall.

Description

Heat-insulating wall material and preparation method thereof
Technical Field
The invention relates to a preparation method of a building material, in particular to a heat-insulating wall material and a preparation method thereof.
Background
With the social development, the nation implements a wall reform policy to achieve the purposes of protecting land and saving energy. The new wall materials appearing in society in recent years are more and more in variety, and the new wall materials are more in application, such as gypsum or cement light partition boards, color steel plates, aerated concrete blocks, steel wire mesh frame foam boards, small concrete hollow blocks, gypsum boards, gypsum blocks, ceramsite blocks, sintered porous bricks, shale bricks, solid concrete bricks, PC large boards, horizontal hole concrete wall boards, activated carbon wall bodies, new partition boards and the like. The novel wall material is a new wall material variety different from the traditional wall materials such as bricks and tiles, sand and lime, and the like, and comprises a plurality of varieties and doors. The functional materials include wall materials, decorative materials, door and window materials, heat insulation materials, waterproof materials, sound insulation materials, bonding and sealing materials, and various hardware, plastic parts, various auxiliary materials and the like matched with the materials. The wall heat-insulating material can greatly save wall materials, improve the heat-insulating property of the wall, save resources and reduce environmental pollution, is widely applied, but is easy to crack and fall off.
The foam concrete is a novel energy-saving environment-friendly building material, and is researched and developed by scholars at home and abroad, so that the foam concrete is widely applied to wall materials. The foam concrete is a novel light heat-insulating material containing a large number of closed air holes, which is formed by fully foaming a foaming agent in a mechanical mode through a foaming system of a foaming machine, uniformly mixing foam and cement slurry, then carrying out cast-in-place construction or mould forming through a pumping system of the foaming machine and carrying out natural maintenance. But it has some defects, such as long preparation time, high cost, and the mechanical property of the foam concrete is inferior to that of the common concrete. Meanwhile, the wall prepared by the existing method has poor comprehensive performance, and waste resources are rarely applied to wall materials, so that the resource utilization is greatly limited. Therefore, the heat-insulating wall material and the preparation method thereof are provided.
Disclosure of Invention
The invention aims to: the method for preparing the heat-insulating wall material has the advantages of short preparation time and low production cost by utilizing the waste materials to prepare the heat-insulating wall material.
In order to achieve the above purpose, the present invention provides the following technical solutions: the heat-insulating wall material comprises the following components: 23-33 parts of cement, 30-40 parts of lime, 10-20 parts of fly ash, 30-40 parts of steel slag powder, 90-150 parts of recycled aggregate, 1-5 parts of cement foaming agent, 10-20 parts of expanded and vitrified micro-beads, 10-20 parts of thermosetting phenolic resin, 65-80 parts of water, 20-47 parts of straw fiber and 10-15 parts of brucite fiber.
Further, the recycled aggregate fineness modulus is 2.6.
Furthermore, the straw fiber is prepared by crushing at least one of straw stalk, corn stalk and wheat stalk, sieving with a 20-100 mesh sieve, and soaking in potassium hydroxide solution for 8-14 h.
Further, the concentration of the potassium hydroxide solution is 1-5mol per liter, and the straw is soaked in the potassium hydroxide solution according to the mass ratio of 1:1-1: 5.
Further, the cement foaming agent is composed of cow hair protein and rapeseed meal protein according to the mass ratio of 1:1.5
A preparation method of a heat-insulating wall body comprises the following steps:
s1, mechanically mixing and stirring 23-33 parts of cement, 30-40 parts of lime, 10-20 parts of fly ash, 30-40 parts of steel slag powder, 90-150 parts of recycled aggregate, 10-20 parts of expanded and vitrified micro-beads, 10-20 parts of thermosetting phenolic resin, 65-80 parts of water, 20-47 parts of straw fiber and 10-15 parts of brucite fiber to form mixed slurry;
s2, adding 1-5 parts of cement foaming agent into the mixed slurry prepared in the S1, and stirring for 30-120S to foam the mixed slurry;
s3, pouring the foamed mixed slurry into a position 1/3 which is at the height of a mold with the bottom pre-paved with the corrosion-resistant mesh cloth, putting a second layer of corrosion-resistant mesh cloth, continuously pouring the foamed slurry to a position 2/3 which is at the height of the mold, putting a third layer of corrosion-resistant mesh cloth, finally paving a fourth layer of corrosion-resistant mesh cloth at a position 1-2cm away from the top of the mold, and standing for 15-24 hours to form a blank;
and S4, maintaining the blank in the step S3.
Further, the curing process comprises the steps of placing the blank in a curing chamber, introducing saturated steam into the curing chamber, raising the temperature at a temperature gradient of 4-8 ℃ per hour to enable the temperature in the curing chamber to reach 65-90 ℃, after curing for 3-6 hours, stopping introducing the saturated steam, naturally cooling the curing chamber to 25-40 ℃, moving the wallboard blank outdoors, and demolding to obtain the heat-insulating wallboard.
Compared with the prior art, the invention has the beneficial effects that:
firstly, straw fiber is adopted, so that the cost can be saved while the heat preservation effect is improved, the source of the straw fiber is wide, waste gas in the nature is fully utilized, and the damage to the environment is reduced; meanwhile, brucite fiber is added, so that the prepared heat-insulating wall has better flame retardance and heat-insulating performance;
secondly, the foam generated by the used foaming agent is stable, and the particle size of the foam is small, so that the strength and the heat insulation performance of the foam concrete wall body are improved; the expanded and vitrified small balls are used as raw materials for preparing the heat-insulating wall body, so that the defects of the traditional method using polyphenyl particles can be overcome, and the expanded and vitrified small balls have high water absorption and are easy to pulverize, so that the finished product prepared at the later stage has better heat-insulating property and avoids the phenomenon of hollowing and cracking;
in addition, the technical scheme utilizes the steel slag to replace the consumption of cement, so that the strength of the wall body is improved, and the steel slag waste is utilized; furthermore, the recycled aggregate is used for replacing sand, so that the heat-preservation and energy-saving effects are improved while solid waste is utilized; the thermosetting phenolic resin is matched with the foaming agent, so that the prepared heat-insulating wall body is lighter in weight, wider in application temperature range and better in heat-insulating property;
fourthly, in the preparation process, the prepared wall body is formed by arranging the corrosion-resistant grid cloth in a layered mode;
in conclusion, the invention utilizes the characteristics of substances, realizes the environmental protection utilization of materials, ensures that the prepared wall has better heat insulation performance and excellent corrosion resistance, and greatly improves the application range of the heat insulation wall.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The modulus of fineness of the recycled aggregate used in the following examples was 2.6; the cement foaming agent is composed of cow hair protein and rapeseed meal protein according to the mass ratio of 1: 1.5.
The straw fiber used in example 1 is prepared by crushing straw, sieving with a 20-mesh sieve, and soaking in 1mol/L potassium hydroxide solution for 8h, wherein the soaking ratio is 1:1.
The straw fiber used in example 2 was prepared by crushing straw stalks and corn stalks, sieving with a 50 mesh sieve, and soaking in a 3mol/L potassium hydroxide solution for 10 hours at a soaking ratio of 1: 3.
The straw fiber used in example 3 was prepared by mixing and crushing straw stalks, corn stalks and wheat stalks, sieving with a 100 mesh sieve, and soaking in 5mol/L potassium hydroxide solution for 14 hours at a soaking ratio of 1: 5.
Example 1
A preparation method of a heat-insulating wall body comprises the following steps:
s1, mechanically mixing and stirring 23 parts of cement, 30 parts of lime, 10 parts of fly ash, 30 parts of steel slag powder, 90 parts of recycled aggregate, 10 parts of expanded and vitrified micro-beads, 10 parts of thermosetting phenolic resin, 65 parts of water, 20 parts of straw fiber and 10 parts of brucite fiber to form mixed slurry;
s2, adding 1-5 parts of cement foaming agent into the mixed slurry prepared in the S1, and stirring for 40S to foam the mixed slurry;
s3, pouring the foamed mixed slurry into a position 1/3 which is at the height of a mold with the bottom pre-paved with corrosion-resistant mesh cloth, putting a second layer of corrosion-resistant mesh cloth, continuously pouring the foamed slurry to a position 2/3 which is at the height of the mold, putting a third layer of corrosion-resistant mesh cloth, finally paving a fourth layer of corrosion-resistant mesh cloth at a position 1cm away from the top of the mold, and standing for 15 hours to form a blank;
and S4, maintaining the blank in the step S3, wherein the maintenance process comprises the steps of placing the blank in a maintenance chamber, introducing saturated steam into the maintenance chamber, raising the temperature at 4 ℃ per hour to enable the temperature in the maintenance chamber to reach 65 ℃, stopping introducing the saturated steam after maintaining for 6 hours, naturally cooling the maintenance chamber to 25 ℃, moving the wallboard blank outdoors, and demolding to obtain the heat-insulating wallboard.
Embodiment 2 a method for preparing a thermal insulation wall, comprising the following steps:
s1, mechanically mixing and stirring 28 parts of cement, 35 parts of lime, 15 parts of fly ash, 35 parts of steel slag powder, 120 parts of recycled aggregate, 15 parts of expanded and vitrified micro-beads, 15 parts of thermosetting phenolic resin, 70 parts of water, 30 parts of straw fiber and 12 parts of brucite fiber to form mixed slurry;
s2, adding 1-5 parts of cement foaming agent into the mixed slurry prepared in the S1, and stirring for 60S to foam the mixed slurry;
s3, pouring the foamed mixed slurry into a position 1/3 which is at the height of a mold with the bottom pre-paved with the corrosion-resistant mesh cloth, putting a second layer of corrosion-resistant mesh cloth, continuously pouring the foamed slurry to a position 2/3 which is at the height of the mold, putting a third layer of corrosion-resistant mesh cloth, finally paving a fourth layer of corrosion-resistant mesh cloth at a position 1.5cm away from the top of the mold, and standing for 18 hours to form a blank;
and S4, maintaining the blank in the step S3, wherein the maintenance process comprises the steps of placing the blank in a maintenance chamber, introducing saturated steam into the maintenance chamber, raising the temperature at 6 ℃ per hour to enable the temperature in the maintenance chamber to reach 80 ℃, stopping introducing the saturated steam after maintaining for 4 hours, naturally cooling the maintenance chamber to 30 ℃, moving the wallboard blank outdoors, and demolding to obtain the heat-insulating wallboard.
Example 3
A preparation method of a heat-insulating wall body comprises the following steps:
s1, mechanically mixing and stirring 33 parts of cement, 40 parts of lime, 20 parts of fly ash, 40 parts of steel slag powder, 150 parts of recycled aggregate, 20 parts of expanded and vitrified micro-beads, 20 parts of thermosetting phenolic resin, 80 parts of water, 47 parts of straw fiber and 15 parts of brucite fiber to form mixed slurry;
s2, adding 1-5 parts of cement foaming agent into the mixed slurry prepared in the S1, and stirring for 120S to foam the mixed slurry;
s3, pouring the foamed mixed slurry into a position 1/3 which is at the height of a mold with the bottom pre-paved with corrosion-resistant mesh cloth, putting a second layer of corrosion-resistant mesh cloth, continuously pouring the foamed slurry to a position 2/3 which is at the height of the mold, putting a third layer of corrosion-resistant mesh cloth, finally paving a fourth layer of corrosion-resistant mesh cloth at a position 2cm away from the top of the mold, and standing for 24 hours to form a blank;
and S4, maintaining the blank in the step S3.
Further, the curing process is that the blank is placed in a curing chamber, saturated steam is introduced into the curing chamber, the temperature is increased by a temperature gradient of 8 ℃ per hour, the temperature in the curing chamber reaches 90 ℃, after curing is carried out for 3 hours, the introduction of the saturated steam is stopped, when the temperature in the curing chamber is naturally reduced to 40 ℃, the wallboard blank is moved outdoors, and the heat-insulating wallboard is obtained after demolding.
According to the performance test method disclosed by the embodiment of the invention, the compressive strength is determined according to JG/T266-2011 foam concrete, the dry density, the thermal conductivity and the volume water absorption are determined according to GB/T26000-2010 expanded vitrified micro-bead thermal insulation mortar, the impact resistance and the freeze-thaw resistance are determined according to JG149-2003 expanded polyphenyl plate thin plastered outer wall external thermal insulation system, the hanging force is determined according to GB/T23450-2009 thermal insulation batten for a building partition wall, the combustion performance is classified according to a classification method in GB 8624-2012 classification of combustion performance of building materials and products, and the performance indexes are tested according to GB/T8626-2007 flammability test method of building materials, wherein the indexes of the performance test method disclosed by the embodiment of the invention are shown in Table 1.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. The heat-insulating wall material is characterized by comprising the following components: 23-33 parts of cement, 30-40 parts of lime, 10-20 parts of fly ash, 30-40 parts of steel slag powder, 90-150 parts of recycled aggregate, 1-5 parts of cement foaming agent, 10-20 parts of expanded and vitrified micro-beads, 10-20 parts of thermosetting phenolic resin, 65-80 parts of water, 20-47 parts of straw fiber and 10-15 parts of brucite fiber.
2. The thermal insulation wall material according to claim 1, wherein the recycled aggregate fineness modulus is 2.6.
3. The heat-insulating wall material as claimed in claim 1, wherein the stalk fiber is prepared by pulverizing at least one of straw stalk, corn stalk and wheat stalk, sieving with 20-100 mesh sieve, and soaking in potassium hydroxide solution for 8-14 hr.
4. The heat-insulating wall material as claimed in claim 3, wherein the concentration of the potassium hydroxide solution is 1-5mol per liter, and the soaking is carried out according to the mass ratio of the straw to the potassium hydroxide solution being 1:1-1: 5.
5. The thermal insulation wall material as claimed in claim 1, wherein the cement foaming agent is composed of cow hair protein and rapeseed meal protein according to a mass ratio of 1: 1.5.
6. The preparation method of the heat-insulating wall body is characterized by comprising the following steps:
s1, mechanically mixing and stirring 23-33 parts of cement, 30-40 parts of lime, 10-20 parts of fly ash, 30-40 parts of steel slag powder, 90-150 parts of recycled aggregate, 10-20 parts of expanded and vitrified micro-beads, 10-20 parts of thermosetting phenolic resin, 65-80 parts of water, 20-47 parts of straw fiber and 10-15 parts of brucite fiber to form mixed slurry;
s2, adding 1-5 parts of cement foaming agent into the mixed slurry prepared in the S1, and stirring for 30-120S to foam the mixed slurry;
s3, pouring the foamed mixed slurry into a position 1/3 of the height of a mold with the bottom pre-paved with corrosion-resistant mesh cloth, putting a second layer of corrosion-resistant mesh cloth, continuously pouring the foamed slurry to a position 2/3 of the height of the mold, putting a third layer of corrosion-resistant mesh cloth, finally paving a fourth layer of corrosion-resistant mesh cloth at a position 1-2cm away from the top of the mold, and standing for 15-24 hours to form a blank;
and S4, maintaining the blank in the step S3.
7. The preparation method of the heat-insulating wall body as claimed in claim 6, wherein the steps of: and in the curing process, the blank is placed in a curing chamber, saturated steam is introduced into the curing chamber, the temperature is increased by a temperature gradient of 4-8 ℃ per hour, the temperature in the curing chamber reaches 65-90 ℃, after curing is carried out for 3-6 hours, the introduction of the saturated steam is stopped, when the temperature in the curing chamber is naturally reduced to 25-40 ℃, the wallboard blank is moved outdoors, and the heat-insulating wallboard is obtained after demolding.
CN202010756572.8A 2020-07-31 2020-07-31 Heat-insulating wall material and preparation method thereof Pending CN111943615A (en)

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