CN111892368A - Preparation method of all-solid-waste porous building thermal insulation material - Google Patents

Preparation method of all-solid-waste porous building thermal insulation material Download PDF

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CN111892368A
CN111892368A CN202010632247.0A CN202010632247A CN111892368A CN 111892368 A CN111892368 A CN 111892368A CN 202010632247 A CN202010632247 A CN 202010632247A CN 111892368 A CN111892368 A CN 111892368A
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powder
slurry
solid
cementing material
preparation
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崔孝炜
狄燕清
周春生
南宁
刘璇
李峰
杨强
王之宇
郭家林
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Shangluo University
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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
    • 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
    • B28C5/40—Mixing specially adapted for preparing mixtures containing fibres
    • B28C5/402—Methods
    • 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
    • C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
    • 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
    • C04B2111/00017—Aspects relating to the protection of the environment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40—Porous or lightweight materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention provides a preparation method of a full-solid waste porous building heat-insulating material, which comprises the following steps: drying tailings, steel slag, slag and gypsum, grinding, mixing with fly ash to obtain a basic cementing material M, adding an additive, adding polypropylene fiber, triethanolamine and calcium stearate, mixing, dispersing in water to obtain unfoamed slurry P, adding a hydrogen peroxide aqueous solution, casting and molding, maintaining, demolding and cutting to obtain the full-solid waste porous heat-insulating material. The invention is simple, the production cost is low, the product not only has high strength, light weight, heat preservation and insulation, but also has good durability, long service life, environmental protection and excellent fireproof performance.

Description

Preparation method of all-solid-waste porous building thermal insulation material
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a preparation method of a full-solid-waste porous building thermal insulation material.
Background
At present, building heat-insulating materials commonly used at home and abroad are divided into organic matters and inorganic matters. The organic building heat-insulating material includes polystyrene foam plastics (EPS, XPS), polyurethane rigid foam (PU), etc., and has the advantages of light weight, heat insulation and water resistance. However, these organic foams are prone to aging and cannot have the same life as a building, and the insulation layer needs to be replaced many times during the service life of the building. In addition, EPS (expandable polystyrene), XPS (extruded polystyrene foam plastic for heat insulation), PU and the like are all high molecular organic materials, have the defects of inflammability, no high temperature resistance, high combustion speed, generation of a large amount of toxic gases and the like, and have great fire hazard.
At present, inorganic building heat-insulating materials in the market mainly comprise expanded perlite, aerated concrete blocks, sulfur-aluminum silicate inorganic heat-insulating plates and the like, and the materials have the greatest advantage of strong fire resistance, but are not beneficial to large-area popularization due to high volume weight and high heat conductivity coefficient. In addition, the production of cement requires the emission of a large amount of CO2And other pollutants, and the use of a large amount of common portland cement inevitably results in great discount on the environmental protection performance of the foam concrete material.
In conclusion, the development of new heat-insulating materials has a wide prospect and becomes an important development direction in the future.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of a full-solid waste porous building heat-insulating material aiming at the defects of the prior art, the method is simple, the production cost is low, and the product not only has high strength, light weight, heat preservation and insulation, but also has the characteristics of good durability, long service life, environmental protection and the like, and has excellent fireproof performance.
In order to solve the technical problems, the invention adopts the technical scheme that: a preparation method of a full-solid waste porous building heat-insulating material comprises the following steps:
s1, drying the tailings, the steel slag, the slag and the gypsum respectively at the temperature of 60-100 ℃ until the water content is less than or equal to 1%, and then respectively grinding to obtain tailing powder, steel slag powder, slag powder and gypsum powder; the specific surface area of the tailing powder is 600m2/kg～2000m2Per kg; the specific surface area of the steel slag powder is 600m2/kg～800m2Per kg; the specific surface area of the slag powder is 550m2/kg～800m2/kg；
S2, mixing the fly ash with the tailing powder, the steel slag powder, the slag powder and the gypsum powder obtained in the step S1 to obtain a basic cementing material M; the specific surface area of the fly ash is 600m2/kg～900m2Per kg; the basic cementing material M consists of the following raw materials in percentage by mass: 10-25% of fly ash, 10-20% of tailing powder, 10-20% of steel slag powder, 40-50% of slag powder and the balance of gypsum powder; under the proportion, various solid wastes are mutually cooperated, the hydration reaction rate can be effectively controlled, and meanwhile, the composite material has good later strength increasing space;
s3, adding an additive into the basic cementing material M obtained in the S2 to obtain a cementing material N;
s4, adding polypropylene fibers, triethanolamine and calcium stearate into the cementing material N obtained in the S3, mixing, and dispersing into water to obtain unfoamed slurry P;
s5, adding 25-50% by mass of hydrogen peroxide aqueous solution into the unfoamed slurry P obtained in the S4, and stirring to obtain pre-foamed slurry; the foaming rate is adjusted by controlling the adding rate and the proportion of the hydrogen peroxide, so that the purpose of controlling the size and the structure of bubbles is achieved.
And S6, casting and molding the pre-foaming slurry obtained in the S5, and then obtaining the full-solid waste porous heat-insulating material through maintenance, demolding and cutting.
Preferably, the tailings in S1 are more than one of molybdenum tailings, vanadium tailings and iron tailings.
Preferably, the grinding time in the S1 is 1-3 h.
Preferably, the additive in S3 is one or more of an early strength agent, an accelerating agent, calcium stearate, aqueous polyurethane and triethanolamine.
Preferably, the mass fraction of the additive in the cementing material N in S3 is 0.3-3%.
Preferably, the mass ratio of the polypropylene fibers, the gelling material N, the triethanolamine, the calcium stearate and the water in the unfoamed slurry P in S4 is (0.2-0.6): 40: (0.3-0.6): (0.3-0.8): (35-55).
Preferably, the mass ratio of the unfoamed slurry P to the hydrogen peroxide aqueous solution in the prefoamed slurry in S5 is (30-50): 1.
preferably, the maintaining method in S6 is to maintain the pre-foamed slurry cast-molded from the pre-foamed slurry at a temperature of 45 ℃ to 99 ℃ and a humidity of 90% to 100%.
Compared with the prior art, the invention has the following advantages:
1. the invention selects tailings, steel slag, gypsum and fly ash industrial solid waste as raw materials to prepare the basic cementing material M, realizes the resource utilization of the solid waste, and adjusts the hardening speed of the pre-foaming slurry by controlling the specific surface area and the mass percentage of the tailings powder, the steel slag powder, the gypsum powder and the fly ash, thereby controlling the size and the porosity of bubbles, obtaining the porous building heat-insulating material which has uniform bubbles and porosity, reducing the heat conductivity coefficient while keeping the strength of the foam heat-insulating material, and having certain apparent density and better heat-insulating effect.
2. The preparation method is simple, the production cost is low, and the product has the advantages of high strength, light weight, heat preservation, heat insulation, strong fireproof capacity, good durability, long service life, environmental protection and convenient popularization and use. The foaming rate is adjusted by controlling the specific surface area and the doping proportion of each component in the raw materials and the adding rate and proportion of hydrogen peroxide, so as to realize the purpose of controlling the size and the structure of bubbles
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a microscopic view of the total solid waste porous building insulation of example 1 of the present invention.
Detailed Description
Example 1
The preparation method of the all-solid-waste porous building thermal insulation material comprises the following steps:
s1, respectively drying the tailings, the steel slag, the slag and the gypsum at the temperature of 80 ℃ until the water content is less than or equal to 1%, and then respectively grinding for 4.5h to obtain tailing powder, steel slag powder and gypsum powder; the specific surface area of the tailing powder is 1300m2Per kg; the specific surface area of the steel slag powder is 6700m2Per kg; the specific surface area of the slag powder is 675m2Per kg; the tailings are molybdenum tailings;
s2, mixing the fly ash with the tailing powder, the steel slag powder, the slag powder and the gypsum powder obtained in the step S1 to obtain a basic cementing material M; the specific surface area of the fly ash is 750m2Per kg; the basic cementing material M consists of the following raw materials in percentage by mass: 18% of fly ash, 15% of tailing powder, 15% of steel slag powder, 45% of slag powder and the balance of gypsum powder;
s3, adding an additive into the basic cementing material M obtained in the S2 to obtain a cementing material N; the additive is an early strength agent; the mass fraction of the additive in the cementing material N is 2.6%;
s4, adding polypropylene fibers, triethanolamine and calcium stearate into the cementing material N obtained in the S3, mixing, and dispersing into water to obtain unfoamed slurry P; the mass ratio of the polypropylene fiber, the cementing material N, the triethanolamine, the calcium stearate and the water in the unfoamed slurry P is 0.4: 40: 0.45: 5.5: 40;
s5, adding 38% hydrogen peroxide aqueous solution in mass fraction into the unfoamed slurry P obtained in the S4, and stirring to obtain pre-foamed slurry; the mass ratio of unfoamed slurry P to hydrogen peroxide aqueous solution in the pre-foamed slurry is 40: 1.
s6, casting and molding the pre-foaming slurry obtained in the S5, and then obtaining the full-solid waste porous heat-insulating material through maintenance, demolding and cutting; the maintenance method is to maintain the pre-foaming slurry formed by casting the pre-foaming slurry at the temperature of 60 ℃ and the humidity of 95%.
The porosity of the all-solid-waste porous building thermal insulation material prepared by the embodiment is 89.1%, and the dry density is 220kg/m3The compressive strength is 0.54MPa, the volume water absorption rate is 9.1 percent, and the fire resistance is A1 grade.
As can be seen from fig. 1, the size and distribution of the micropores are relatively uniform.
Example 2
The preparation method of the all-solid-waste porous building thermal insulation material comprises the following steps:
s1, respectively drying the tailings, the steel slag, the slag and the gypsum at the temperature of 60 ℃ until the water content is less than or equal to 1%, and then respectively grinding for 4 hours to obtain tailing powder, steel slag powder and gypsum powder; the specific surface area of the tailing powder is 600m2Per kg; the specific surface area of the steel slag powder is 600m2Per kg; the specific surface area of the slag powder is 800m2Per kg; the tailings are a mixture of molybdenum tailings, vanadium tailings and iron tailings in a mass ratio of 1:2: 1;
s2, mixing the fly ash with the tailing powder, the steel slag powder, the slag powder and the gypsum powder obtained in the step S1 to obtain a basic cementing material M; the specific surface area of the fly ash is 600m2Per kg; the basic cementing material M consists of the following raw materials in percentage by mass: 10% of fly ash, 10% of tailing powder, 20% of steel slag powder, 50% of slag powder and the balance of gypsum powder;
s3, adding an additive into the basic cementing material M obtained in the S2 to obtain a cementing material N; the admixture is a mixture of an early strength agent, an accelerator, calcium stearate, waterborne polyurethane and triethanolamine in a mass ratio of 1:2:1:1: 3; the mass fraction of the additive in the cementing material N is 3%;
s4, adding polypropylene fibers, triethanolamine and calcium stearate into the cementing material N obtained in the S3, mixing, and dispersing into water to obtain unfoamed slurry P; the mass ratio of the polypropylene fiber, the cementing material N, the triethanolamine, the calcium stearate and the water in the unfoamed slurry P is 0.2: 40: 0.3: 0.8: 35;
s5, adding 50% by mass of hydrogen peroxide aqueous solution into the unfoamed slurry P obtained in the S4, and stirring to obtain pre-foamed slurry; the mass ratio of unfoamed slurry P to hydrogen peroxide aqueous solution in the pre-foamed slurry is 30: 1.
s6, casting and molding the pre-foaming slurry obtained in the S5, and then obtaining the full-solid waste porous heat-insulating material through maintenance, demolding and cutting; the maintenance method is to maintain the pre-foaming slurry formed by casting the pre-foaming slurry at the temperature of 45 ℃ and the humidity of 100%.
The porosity of the all-solid-waste porous building thermal insulation material prepared by the embodiment is 92.5%, and the dry density is 207kg/m3The compressive strength is 0.51MPa, the volume water absorption rate is 9.5 percent, and the fire resistance is A1 grade.
Example 3
The preparation method of the all-solid-waste porous building thermal insulation material comprises the following steps:
s1, respectively drying the tailings, the steel slag, the slag and the gypsum at the temperature of 100 ℃ until the water content is less than or equal to 1%, and then respectively grinding for 5 hours to obtain tailing powder, steel slag powder and gypsum powder; the specific surface area of the tailing powder is 2000m2Per kg; the specific surface area of the steel slag powder is 800m2Per kg; the specific surface area of the slag powder is 550m2Per kg; the tailings are a mixture of molybdenum tailings and vanadium tailings in a mass ratio of 1: 1;
s2, mixing the fly ash with the tailings powder, the steel slag powder, the slag powder and the stone obtained in the step S1Mixing the paste powder to obtain a basic cementing material M; the specific surface area of the fly ash is 900m2Per kg; the basic cementing material M consists of the following raw materials in percentage by mass: 25% of fly ash, 20% of tailing powder, 10% of steel slag powder, 40% of slag powder and the balance of gypsum powder;
s3, adding an additive into the basic cementing material M obtained in the S2 to obtain a cementing material N; the admixture is a mixture of an early strength agent and an accelerator in a mass ratio of 1: 1; the mass fraction of the additive in the cementing material N is 0.3%;
s4, adding polypropylene fibers, triethanolamine and calcium stearate into the cementing material N obtained in the S3, mixing, and dispersing into water to obtain unfoamed slurry P; the mass ratio of the polypropylene fiber, the cementing material N, the triethanolamine, the calcium stearate and the water in the unfoamed slurry P is 0.6: 40: 0.6: 0.3: 55;
s5, adding a 25% hydrogen peroxide solution in mass fraction into the unfoamed slurry P obtained in the S4, and stirring to obtain a pre-foamed slurry; the mass ratio of unfoamed slurry P to hydrogen peroxide aqueous solution in the pre-foamed slurry is 50: 1.
s6, casting and molding the pre-foaming slurry obtained in the S5, and then obtaining the full-solid waste porous heat-insulating material through maintenance, demolding and cutting; the maintenance method is to maintain the pre-foaming slurry formed by casting the pre-foaming slurry at the temperature of 99 ℃ and the humidity of 90 percent.
The porosity of the all-solid-waste porous building thermal insulation material prepared in the embodiment is 91.8%, and the dry density is 214 kg/m3The compressive strength is 0.52MPa, the volume water absorption rate is 9.3 percent, and the fire resistance is A1 grade.
Example 4
The preparation method of the all-solid-waste porous building thermal insulation material comprises the following steps:
s1, respectively drying the tailings, the steel slag, the slag and the gypsum at the temperature of 90 ℃ until the water content is less than or equal to 1%, and then respectively grinding for 4 hours to obtain tailing powder, steel slag powder and gypsum powder; the specific surface area of the tailing powder is 600m2Per kg; the specific surface area of the steel slag powder is 800m2Per kg; the specific surface area of the slag powder is 550m2Per kg; the tailings are a mixture of vanadium tailings and iron tailings in a mass ratio of 5: 1;
s2, mixing the fly ash with the tailing powder, the steel slag powder, the slag powder and the gypsum powder obtained in the step S1 to obtain a basic cementing material M; the specific surface area of the fly ash is 600m2Per kg; the basic cementing material M consists of the following raw materials in percentage by mass: 10% of fly ash, 10% of tailing powder, 10% of steel slag powder, 40% of slag powder and the balance of gypsum powder;
s3, adding an additive into the basic cementing material M obtained in the S2 to obtain a cementing material N; the admixture is prepared from the following components in a mass ratio of 1: 3: 2 a mixture of calcium stearate, aqueous polyurethane and triethanolamine; the mass fraction of the additive in the cementing material N is 2%;
s4, adding polypropylene fibers, triethanolamine and calcium stearate into the cementing material N obtained in the S3, mixing, and dispersing into water to obtain unfoamed slurry P; the mass ratio of the polypropylene fiber, the cementing material N, the triethanolamine, the calcium stearate and the water in the unfoamed slurry P is 0.3: 40: 0.6: 0.4: 35;
s5, adding a 25% hydrogen peroxide solution in mass fraction into the unfoamed slurry P obtained in the S4, and stirring to obtain a pre-foamed slurry; the mass ratio of unfoamed slurry P to hydrogen peroxide aqueous solution in the pre-foamed slurry is 40: 1.
s6, casting and molding the pre-foaming slurry obtained in the S5, and then obtaining the full-solid waste porous heat-insulating material through maintenance, demolding and cutting; the maintenance method is to maintain the pre-foaming slurry formed by casting the pre-foaming slurry at the temperature of 80 ℃ and the humidity of 95%.
The porosity of the all-solid-waste porous building thermal insulation material prepared by the embodiment is 90.5%, and the dry density is 217 kg/m3The compressive strength is 0.52MPa, the volume water absorption rate is 9.2 percent, and the fire resistance is A1 grade.
Example 5
The preparation method of the all-solid-waste porous building thermal insulation material comprises the following steps:
s1, respectively drying the tailings, the steel slag, the slag and the gypsum at the temperature of 70 ℃ until the water content is less than or equal to 1%, and then respectively grinding for 5 hours to obtain tailing powder, steel slag powder and gypsum powder; the specific surface area of the tailing powder is 1800m2Per kg; the specific surface area of the steel slag powder is 700m2Per kg; the specific surface area of the slag powder is 700m2Per kg; the tailings are a mixture of molybdenum tailings and iron tailings in a mass ratio of 2: 1;
s2, mixing the fly ash with the tailing powder, the steel slag powder, the slag powder and the gypsum powder obtained in the step S1 to obtain a basic cementing material M; the specific surface area of the fly ash is 800m2Per kg; the basic cementing material M consists of the following raw materials in percentage by mass: 15% of fly ash, 18% of tailing powder, 18% of steel slag powder, 42% of slag powder and the balance of gypsum powder;
s3, adding an additive into the basic cementing material M obtained in the S2 to obtain a cementing material N; the admixture is prepared from the following components in a mass ratio of 1: 4, a mixture of the aqueous polyurethane of (a) and triethanolamine; the mass fraction of the additive in the cementing material N is 2.5%;
s4, adding polypropylene fibers, triethanolamine and calcium stearate into the cementing material N obtained in the S3, mixing, and dispersing into water to obtain unfoamed slurry P; the mass ratio of the polypropylene fiber, the cementing material N, the triethanolamine, the calcium stearate and the water in the unfoamed slurry P is 0.5: 40: 0.4: 0.7: 35;
s5, adding 45% by mass of hydrogen peroxide aqueous solution into the unfoamed slurry P obtained in the S4, and stirring to obtain pre-foamed slurry; the mass ratio of unfoamed slurry P to hydrogen peroxide aqueous solution in the pre-foamed slurry is 50: 1.
s6, casting and molding the pre-foaming slurry obtained in the S5, and then obtaining the full-solid waste porous heat-insulating material through maintenance, demolding and cutting; the maintenance method is to maintain the pre-foaming slurry formed by casting the pre-foaming slurry at the temperature of 50 ℃ and the humidity of 98%.
The porosity of the all-solid-waste porous building thermal insulation material prepared by the embodiment is 91.4%, and the dry density is 208 kg/m3And a compressive strength of 0.51MPa, 9.1 percent of volume water absorption and A1-grade fireproof performance.
Example 6
The preparation method of the all-solid-waste porous building thermal insulation material comprises the following steps:
s1, respectively drying the tailings, the steel slag, the slag and the gypsum at the temperature of 60 ℃ until the water content is less than or equal to 1%, and then respectively grinding for 4 hours to obtain tailing powder, steel slag powder and gypsum powder; the specific surface area of the tailing powder is 1500m2Per kg; the specific surface area of the steel slag powder is 800m2Per kg; the specific surface area of the slag powder is 800m2Per kg; the tailings are vanadium tailings;
s2, mixing the fly ash with the tailing powder, the steel slag powder, the slag powder and the gypsum powder obtained in the step S1 to obtain a basic cementing material M; the specific surface area of the fly ash is 700m2Per kg; the basic cementing material M consists of the following raw materials in percentage by mass: 23% of fly ash, 12% of tailing powder, 13% of steel slag powder, 45% of slag powder and the balance of gypsum powder;
s3, adding an additive into the basic cementing material M obtained in the S2 to obtain a cementing material N; the admixture is prepared from the following components in a mass ratio of 1: 4: 1, a mixture of an early strength agent, calcium stearate and triethanolamine; the mass fraction of the additive in the cementing material N is 3%;
the additive can also be more than one of an early strength agent, an accelerating agent, calcium stearate, waterborne polyurethane and triethanolamine;
s4, adding polypropylene fibers, triethanolamine and calcium stearate into the cementing material N obtained in the S3, mixing, and dispersing into water to obtain unfoamed slurry P; the mass ratio of the polypropylene fiber, the cementing material N, the triethanolamine, the calcium stearate and the water in the unfoamed slurry P is 0.6: 40: 0.6: 0.8: 40;
s5, adding a 25% hydrogen peroxide solution in mass fraction into the unfoamed slurry P obtained in the S4, and stirring to obtain a pre-foamed slurry; the mass ratio of unfoamed slurry P to hydrogen peroxide aqueous solution in the pre-foamed slurry is 35: 1.
s6, casting and molding the pre-foaming slurry obtained in the S5, and then obtaining the full-solid waste porous heat-insulating material through maintenance, demolding and cutting; the maintenance method is to maintain the pre-foaming slurry formed by casting the pre-foaming slurry at the temperature of 99 ℃ and the humidity of 100%.
The porosity of the all-solid-waste porous building thermal insulation material prepared by the embodiment is 91.5%, and the dry density is 210 kg/m3The compressive strength is 0.52MPa, the volume water absorption rate is 9.2 percent, and the fire resistance is A1 grade.
Example 7
The preparation method of the all-solid-waste porous building thermal insulation material comprises the following steps:
s1, respectively drying the tailings, the steel slag, the slag and the gypsum at the temperature of 60-100 ℃ until the water content is less than or equal to 1%, and then respectively grinding for 4h to obtain tailing powder, steel slag powder and gypsum powder; the specific surface area of the tailing powder is 1200m2Per kg; the specific surface area of the steel slag powder is 700m2Per kg; the specific surface area of the slag powder is 700m2Per kg; the tailings are iron tailings;
s2, mixing the fly ash with the tailing powder, the steel slag powder, the slag powder and the gypsum powder obtained in the step S1 to obtain a basic cementing material M; the specific surface area of the fly ash is 900m2Per kg; the basic cementing material M consists of the following raw materials in percentage by mass: 12% of fly ash, 10% of tailing powder, 15% of steel slag powder, 50% of slag powder and the balance of gypsum powder;
s3, adding an additive into the basic cementing material M obtained in the S2 to obtain a cementing material N; the admixture accelerator; the mass fraction of the additive in the cementing material N is 3%;
the additive can also be an early strength agent, calcium stearate, waterborne polyurethane or triethanolamine;
s4, adding polypropylene fibers, triethanolamine and calcium stearate into the cementing material N obtained in the S3, mixing, and dispersing into water to obtain unfoamed slurry P; the mass ratio of the polypropylene fiber, the cementing material N, the triethanolamine, the calcium stearate and the water in the unfoamed slurry P is 0.2: 40: 0.5: 0.4: 50;
s5, adding 30% by mass of hydrogen peroxide aqueous solution into the unfoamed slurry P obtained in the S4, and stirring to obtain pre-foamed slurry; the mass ratio of unfoamed slurry P to hydrogen peroxide aqueous solution in the pre-foamed slurry is 40: 1.
s6, casting and molding the pre-foaming slurry obtained in the S5, and then obtaining the full-solid waste porous heat-insulating material through maintenance, demolding and cutting; the maintenance method is to maintain the pre-foaming slurry formed by casting the pre-foaming slurry at the temperature of 99 ℃ and the humidity of 100%.
The porosity of the all-solid-waste porous building thermal insulation material prepared by the embodiment is 92.3%, and the dry density is 206 kg/m3The compressive strength is 0.50MPa, the volume water absorption rate is 9.1 percent, and the fire resistance is A1 grade.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.

Claims (8)

1. A preparation method of a full-solid waste porous building heat insulation material is characterized by comprising the following steps:
s1, respectively drying the tailings, the steel slag, the slag and the gypsum at the temperature of 60-100 ℃ until the water content is less than or equal to 1%, and then respectively grinding to obtain tailing powder, steel slag powder, slag powder and gypsum powder; the specific surface area of the tailing powder is 600m2/kg～2000m2Per kg; the specific surface area of the steel slag powder is 600m2/kg～800m2Per kg; the specific surface area of the slag powder is 550m2/kg～800m2/kg；
S2, mixing the fly ash with the tailing powder, the steel slag powder, the slag powder and the gypsum powder obtained in the step S1 to obtain a basic cementing material M; the specific surface area of the fly ash is 600m2/kg～900m2Per kg; the basic cementing material M consists of the following raw materials in percentage by mass: 10-25% of fly ash, 10-20% of tailing powder and 10% of steel slag powder20 percent, 40 to 50 percent of slag powder and the balance of gypsum powder;
s3, adding an additive into the basic cementing material M obtained in the S2 to obtain a cementing material N;
s4, adding polypropylene fibers, triethanolamine and calcium stearate into the cementing material N obtained in the S3, mixing, and dispersing into water to obtain unfoamed slurry P;
s5, adding 25-50% by mass of hydrogen peroxide aqueous solution into the unfoamed slurry P obtained in the S4, and stirring to obtain pre-foamed slurry;
and S6, casting and molding the pre-foaming slurry obtained in the S5, and then obtaining the full-solid waste porous heat-insulating material through maintenance, demolding and cutting.
2. The preparation method of the all-solid-waste porous building thermal insulation material according to claim 1, wherein the tailings in the step S1 are more than one of molybdenum tailings, vanadium tailings and iron tailings.
3. The preparation method of the all-solid-waste porous building thermal insulation material according to claim 1, wherein the time for grinding in the S1 is 1-3 hours.
4. The preparation method of the all-solid-waste porous building thermal insulation material as claimed in claim 1, wherein the additive in S3 is one or more of an early strength agent, an accelerator, calcium stearate, aqueous polyurethane and triethanolamine.
5. The preparation method of the all-solid-waste porous building thermal insulation material as claimed in claim 1, wherein the mass fraction of the additive in the cementing material N in S3 is 0.3% -3%.
6. The preparation method of the all-solid-waste porous building thermal insulation material as claimed in claim 1, wherein the mass ratio of the polypropylene fiber, the cementing material N, the triethanolamine, the calcium stearate and the water in the unfoamed slurry P in S4 is (0.2-0.6): 40: (0.3-0.6): (0.3-0.8): (35-55).
7. The preparation method of the all-solid-waste porous building thermal insulation material as claimed in claim 1, wherein the mass ratio of unfoamed slurry P to hydrogen peroxide aqueous solution in the prefoamed slurry in S5 is (30-50): 1.
8. the method of claim 1, wherein the curing step in S6 is carried out by curing the pre-foamed slurry obtained by casting the pre-foamed slurry at 45-99 ℃ and 90-100% humidity.
CN202010632247.0A 2020-07-03 2020-07-03 Preparation method of all-solid-waste porous building thermal insulation material Pending CN111892368A (en)

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CN113754374A (en) * 2021-09-07 2021-12-07 中国恩菲工程技术有限公司 Low-clinker ultra-high performance concrete and preparation method thereof
CN113912364A (en) * 2021-05-07 2022-01-11 景德镇陶瓷大学 Environment-friendly waste gypsum-based high-strength sound-absorbing heat-insulating material and preparation method thereof
CN114105543A (en) * 2021-12-21 2022-03-01 邯郸市建业建设工程质量检测有限公司 Preparation method of all-solid waste foam concrete
CN115557763A (en) * 2022-09-28 2023-01-03 盐城工学院 Based on slag absorbs CO 2 Formed heat insulation material and preparation method thereof

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CN103193446A (en) * 2013-03-12 2013-07-10 北京科技大学 Method for producing waste residue foam concrete and nanopore vacuum plate composite material
CN103951361A (en) * 2014-04-15 2014-07-30 商洛学院 Preparation method of vanadium-doped tailings inorganic-foam thermal-insulation material for buildings
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CN104250071A (en) * 2013-06-25 2014-12-31 辽宁集佳节能墙体装备有限公司 Chemical foamed concrete and preparation method thereof
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CN113912364A (en) * 2021-05-07 2022-01-11 景德镇陶瓷大学 Environment-friendly waste gypsum-based high-strength sound-absorbing heat-insulating material and preparation method thereof
CN113754374A (en) * 2021-09-07 2021-12-07 中国恩菲工程技术有限公司 Low-clinker ultra-high performance concrete and preparation method thereof
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CN115557763A (en) * 2022-09-28 2023-01-03 盐城工学院 Based on slag absorbs CO 2 Formed heat insulation material and preparation method thereof
CN115557763B (en) * 2022-09-28 2023-12-01 盐城工学院 CO absorption based on steel slag 2 Formed heat insulation material and preparation method thereof

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