CN113735551B - Residue soil base baking-free light thermal insulation material and preparation method and application thereof - Google Patents
Residue soil base baking-free light thermal insulation material and preparation method and application thereof Download PDFInfo
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- CN113735551B CN113735551B CN202111041624.4A CN202111041624A CN113735551B CN 113735551 B CN113735551 B CN 113735551B CN 202111041624 A CN202111041624 A CN 202111041624A CN 113735551 B CN113735551 B CN 113735551B
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- 239000002689 soil Substances 0.000 title claims abstract description 107
- 239000012774 insulation material Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims abstract description 92
- 239000000839 emulsion Substances 0.000 claims abstract description 58
- 229910001629 magnesium chloride Inorganic materials 0.000 claims abstract description 46
- 239000000835 fiber Substances 0.000 claims abstract description 41
- 229920000642 polymer Polymers 0.000 claims abstract description 40
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000009413 insulation Methods 0.000 claims abstract description 31
- 239000003607 modifier Substances 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims description 64
- 239000011810 insulating material Substances 0.000 claims description 46
- 238000003756 stirring Methods 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 16
- 239000007864 aqueous solution Substances 0.000 claims description 14
- 239000010451 perlite Substances 0.000 claims description 12
- 235000019362 perlite Nutrition 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 8
- 238000011049 filling Methods 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 7
- 239000004566 building material Substances 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000010902 straw Substances 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000011863 silicon-based powder Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 abstract description 31
- 239000000463 material Substances 0.000 abstract description 18
- 239000000395 magnesium oxide Substances 0.000 abstract description 15
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract description 10
- 239000002131 composite material Substances 0.000 abstract description 5
- 230000002265 prevention Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 54
- 229960002337 magnesium chloride Drugs 0.000 description 38
- 239000004568 cement Substances 0.000 description 25
- IQYKECCCHDLEPX-UHFFFAOYSA-N chloro hypochlorite;magnesium Chemical compound [Mg].ClOCl IQYKECCCHDLEPX-UHFFFAOYSA-N 0.000 description 22
- 239000002994 raw material Substances 0.000 description 15
- 230000008901 benefit Effects 0.000 description 14
- 238000004321 preservation Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 9
- 238000000465 moulding Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000002195 synergetic effect Effects 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 5
- 229920006254 polymer film Polymers 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 229910010272 inorganic material Inorganic materials 0.000 description 4
- 239000011147 inorganic material Substances 0.000 description 4
- 239000001488 sodium phosphate Substances 0.000 description 4
- 229910000162 sodium phosphate Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 4
- 238000007605 air drying Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- RCJVRSBWZCNNQT-UHFFFAOYSA-N dichloridooxygen Chemical compound ClOCl RCJVRSBWZCNNQT-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 229940050906 magnesium chloride hexahydrate Drugs 0.000 description 2
- DHRRIBDTHFBPNG-UHFFFAOYSA-L magnesium dichloride hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] DHRRIBDTHFBPNG-UHFFFAOYSA-L 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- C04B28/30—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 magnesium cements or similar cements
- C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement
-
- 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
- C04B18/00—Use 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
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a muck-based baking-free light thermal insulation material and a preparation method and application thereof, wherein the preparation method comprises the following steps: the engineering slag soil comprises 80 to 100 portions of dry weight, 15 to 65 portions of inorganic light aggregate, 5 to 30 portions of light calcined magnesia, 1 to 15 portions of magnesium chloride, 3 to 10 portions of polymer emulsion, 0.2 to 1.5 portions of fiber and 0.1 to 1.5 portions of modifier. The residue soil-based non-fired light heat insulation material disclosed by the invention takes engineering residue soil as a base material, inorganic light aggregate as aggregate and light-fired magnesium oxide, magnesium chloride and polymer emulsion as a composite cementing material, so that the resource utilization of the engineering residue soil is realized. The slag-soil-based baking-free light thermal insulation material has the characteristics of light weight, thermal insulation, heat insulation and fire prevention, and can be widely applied to thermal insulation of building walls.
Description
Technical Field
The invention relates to the field of solid waste treatment, in particular to a residue soil-based baking-free light heat-insulating material. In addition, the invention also relates to a preparation method of the slag-soil-based baking-free light thermal insulation material.
Background
With the development of economy and the advancement of urbanization, construction waste continuously and rapidly increases. According to data statistics, about 18 hundred million t of construction waste is generated every year, the resource utilization rate is less than 5 percent, and the current stock of construction waste reaches more than 200 hundred million t. Among these construction wastes, engineering waste has become a "prime force". At present, the main disposal method of engineering dregs is mainly to send to a receiving field for centralized landfill or stacking, and the situation of 'dregs enclosing city' is formed. The engineering dregs are buried or stacked in a centralized way, which not only occupies a large amount of land resources, pollutes the surrounding environment and has expensive disposal cost, but also has potential safety hazard.
The engineering slag soil is a mineral deposit in a city, is a resource misplaced place, and should be researched and utilized. At present, the utilization of engineering muck is concentrated on: separating sand and stone in the engineering muck, and preparing the sand through processes of washing, screening and the like; engineering slag soil is used as a main raw material, and building material products such as bricks, ceramsite and the like are manufactured by adopting a sintering process. However, the above method for resource utilization of engineering slag soil still has the problems of low utilization rate, high energy consumption and the like.
Disclosure of Invention
The invention provides a slag-soil-based non-fired light thermal insulation material and a preparation method and application thereof, and aims to solve the technical problems of low resource utilization rate of engineering slag soil and high energy consumption of slag-soil-based sintered products.
The technical scheme adopted by the invention is as follows:
the residue soil-based baking-free light thermal insulation material comprises the following components in parts by mass: the engineering slag soil comprises 80 to 100 portions of dry weight, 15 to 65 portions of inorganic light aggregate, 5 to 30 portions of light calcined magnesia, 1 to 15 portions of magnesium chloride, 3 to 10 portions of polymer emulsion, 0.2 to 1.5 portions of fiber and 0.1 to 1.5 portions of modifier.
Further, the engineering muck is 85 to 95 portions by dry weight, 15 to 65 portions by dry weight of inorganic light aggregate, 8 to 25 portions by dry weight of light calcined magnesia, 2 to 9 portions by dry weight of magnesium chloride, 5 to 8 portions by dry weight of polymer emulsion, 0.2 to 1.0 portion by dry weight of fiber and 0.3 to 1.0 portion by dry weight of modifier.
Further, the engineering muck is soil-like muck generated by foundation pit excavation or underground engineering construction; and/or the water content of the engineering muck is lower than 3 percent.
Further, the inorganic lightweight aggregate adopts at least one of expanded perlite and vitrified micro bubbles; and/or the inorganic lightweight aggregate has a bulk density of not more than 120kg/m 3 。
Further, the polymer emulsion adopts at least one of VAE emulsion and polyvinyl alcohol emulsion; and/or the solid content of the polymer emulsion is more than or equal to 50 percent.
Furthermore, the fiber is at least one of crop straw fiber and polypropylene fiber; and/or the length of the fibres does not exceed 20mm.
Further, the modifier adopts at least one of phosphate, sulfate, phosphoric acid or silicon powder.
According to another aspect of the invention, the preparation method of the slag-soil based non-fired light heat-insulating material comprises the following steps:
s1, adding magnesium chloride into water, and uniformly stirring to obtain a magnesium chloride aqueous solution;
s2, adding a modifier into the magnesium chloride aqueous solution obtained in the step S1, and uniformly stirring to obtain a mixture A;
s3, uniformly stirring the inorganic light aggregate and the polymer emulsion, and uniformly stirring the inorganic light aggregate, the light calcined magnesia and the fiber to obtain a mixture B;
s4, adding the mixture A obtained in the step S2 into the mixture B obtained in the step S3 in a spraying mode, and uniformly stirring to obtain a mixture C;
and S5, filling the mixture C obtained in the step S4 into a mold, adopting a pressure forming process, demolding, and curing to obtain the residue soil-based baking-free light heat-insulating material.
Further, the Baume degree of the magnesium chloride aqueous solution in the step S1 is 22-30; and/or, in the step S3, the engineering muck is crushed to be less than 4.75mm in particle size.
Further, the water content of the mixture C in the step S4 is 6-18%; and/or the molding pressure of the pressure molding process in the step S5 is 5MPa to 15MPa.
According to another aspect of the invention, the invention also provides application of the muck-based unfired light thermal insulation material in building thermal insulation building materials.
The invention has the following beneficial effects:
the invention relates to a residue soil base baking-free light thermal insulation material, which comprises: engineering slag soil, inorganic light aggregate, light burned magnesium oxide, magnesium chloride, polymer emulsion, fiber and modifier. Engineering muck is used as a matrix material, inorganic lightweight aggregate is used as aggregate, magnesium oxychloride cement and polymer emulsion are used as cementing materials, and the resource utilization of the engineering muck is realized. The inorganic lightweight aggregate has the advantages of light volume weight and good durability, and can effectively reduce the volume weight of the product, so that the product has good heat preservation and heat insulation properties. The magnesium oxychloride cement has strong bonding performance, is very easy to bond with various materials, can effectively solidify engineering slag soil, and obtains a slag soil base non-fired product with high strength; meanwhile, the production period can be shortened because the coagulation and hardening are quicker. The polymer emulsion has good adhesive property and film forming property, and can effectively improve the mechanical strength and waterproof property of the product. The disorderly distributed fibers have a reinforcing effect, so that the bending strength and the tensile strength of the product can be improved, and the toughness of the product can be improved. The modifier can effectively inhibit the halogen return of the magnesium oxychloride cement product. The magnesia oxychloride cement and the polymer emulsion are used as composite cementing materials, and a pressure forming process is adopted to obtain the high-strength slag-soil-based non-fired product under the combined action of chemistry and physics. On the basis, a proper amount of inorganic light aggregate is added, so that the volume weight of the slag-soil-based non-fired product is reduced, and the slag-soil-based non-fired product has good heat preservation and heat insulation properties. The polymer emulsion can form a polymer film in a matrix, has certain flexibility and deformability, and can effectively block capillary channels; the fiber has the effects of strengthening and toughening, and can effectively prevent the generation and the expansion of micro cracks in the matrix; the polymer emulsion and the fiber have synergistic effect to improve the toughness of the product, improve the waterproof performance of the product and overcome the defects of large brittleness and poor water resistance of the magnesium oxychloride cement product. Meanwhile, as the main raw material is inorganic material, the product also has the advantage of fire resistance. The raw materials of the slag-soil-based non-fired light heat-insulating material have synergistic effect, so that the obtained slag-soil-based non-fired light heat-insulating material has the characteristics of light weight, heat preservation, heat insulation and fire resistance, and overcomes the defects of large brittleness and poor water resistance of a magnesium oxychloride cement product. The slag-soil-based non-fired light thermal insulation material can be used for producing thermal insulation materials such as thermal insulation blocks, thermal insulation boards and the like, and can be widely applied to thermal insulation of building walls. The residue soil-based baking-free light thermal insulation material provides a new technical support for resource utilization of engineering residue soil, can consume a large amount of engineering residue soil, improves the resource utilization rate of the residue soil, can develop a new product in the field of novel materials, meets the requirements for building a resource-saving and environment-friendly society, and has better ecological benefit, social benefit and economic benefit.
The residue soil-based baking-free light heat-insulating material is prepared by adding magnesium chloride into water to prepare a magnesium chloride aqueous solution, and then adding a modifier to prepare a mixture A; uniformly stirring inorganic light aggregate and polymer emulsion, and then uniformly stirring the inorganic light aggregate, the light calcined magnesia and the fibers to obtain a mixture B; adding the mixture A into the mixture B in a spraying mode, and uniformly stirring to prepare a mixture C; and (3) filling the mixture C into a mold, adopting a pressure forming process, demolding, and maintaining to obtain the residue soil-based baking-free light heat-insulating material. The inorganic lightweight aggregate and the polymer emulsion are uniformly stirred, so that the polymer emulsion is wrapped on the surface of the inorganic lightweight aggregate, the bonding strength between the inorganic lightweight aggregate and other raw materials can be improved, a formed polymer film can block capillary pipelines, and the waterproof performance of the residue soil-based baking-free lightweight heat-insulating material is improved. The mixture A is added into the mixture B in a spraying mode, and the spraying mode is favorable for uniformly doping the magnesium chloride aqueous solution and the modifier into the engineering muck so as to solve the problem that the engineering muck is difficult to uniformly mix with other raw materials due to large viscosity. The preparation process of the slag-soil-based baking-free light heat-insulating material is simple, the required production field is small, and the production period is short; by adopting a sintering-free process, a large amount of energy can be saved, and the method is low-carbon and environment-friendly. Therefore, the preparation method of the slag-based baking-free light heat-insulating material has the characteristics of simple preparation process, sintering-free property, small production investment and the like.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
The residue soil-based baking-free light heat-insulating material comprises the following components in parts by mass: the engineering slag soil comprises 80 to 100 portions of dry weight, 15 to 65 portions of inorganic light aggregate, 5 to 30 portions of light calcined magnesia, 1 to 15 portions of magnesium chloride, 3 to 10 portions of polymer emulsion, 0.2 to 1.5 portions of fiber and 0.1 to 1.5 portions of modifier.
The invention relates to a residue soil base baking-free light thermal insulation material, which comprises: engineering slag soil, inorganic light aggregate, light burned magnesium oxide, magnesium chloride, polymer emulsion, fiber and modifier. Engineering muck is used as a matrix material, inorganic lightweight aggregate is used as aggregate, magnesium oxychloride cement and polymer emulsion are used as cementing materials, and the resource utilization of the engineering muck is realized. The inorganic lightweight aggregate has the advantages of light volume weight and good durability, and can effectively reduce the volume weight of the product, so that the inorganic lightweight aggregate has good heat preservation and heat insulation properties. The magnesium oxychloride cement has strong bonding performance, is very easy to bond with various materials, can effectively solidify engineering slag soil, and obtains a slag soil base non-fired product with high strength; meanwhile, the production period can be shortened because the coagulation and hardening are quicker. The polymer emulsion has good adhesive property and film forming property, and can effectively improve the mechanical strength and waterproof property of the product. The disorderly distributed fibers have a reinforcing effect, so that the bending strength and the tensile strength of the product can be improved, and the toughness of the product can be improved. The modifier can effectively inhibit the halogen return of the magnesium oxychloride cement product. The magnesia oxychloride cement and the polymer emulsion are used as composite cementing materials, and a pressure forming process is adopted to obtain the high-strength slag-soil-based non-fired product under the combined action of chemistry and physics. On the basis, a proper amount of inorganic light aggregate is added, so that the volume weight of the slag-soil-based non-fired product is reduced, and the slag-soil-based non-fired product has good heat preservation and heat insulation properties. The polymer emulsion can form a polymer film in a matrix, has certain flexibility and deformability, and can effectively block capillary channels; the fiber has the effects of strengthening and toughening, and can effectively prevent the generation and the expansion of micro cracks in the matrix; the polymer emulsion and the fiber have synergistic effect to improve the toughness of the product, improve the waterproof performance of the product and overcome the defects of large brittleness and poor water resistance of the magnesium oxychloride cement product. Meanwhile, the main raw material is inorganic material, so the product also has the advantage of fire resistance. The raw materials of the slag-soil-based non-fired light heat-insulating material have synergistic effect, so that the obtained slag-soil-based non-fired light heat-insulating material has the characteristics of light weight, heat preservation, heat insulation and fire resistance, and overcomes the defects of large brittleness and poor water resistance of a magnesium oxychloride cement product. The slag-soil-based non-fired light thermal insulation material can be used for producing thermal insulation materials such as thermal insulation blocks, thermal insulation boards and the like, and can be widely applied to thermal insulation of building walls. The residue soil-based baking-free light thermal insulation material provides a new technical support for resource utilization of engineering residue soil, can consume a large amount of engineering residue soil, improves the resource utilization rate of the residue soil, can develop a new product in the field of novel materials, meets the requirements for building a resource-saving and environment-friendly society, and has better ecological benefit, social benefit and economic benefit.
The engineering muck is soil muck generated by foundation pit excavation or underground engineering construction. Because the main component of the engineering muck is clay and the water content is lowThe prior art is higher and the viscosity is larger, so the resource utilization difficulty is higher. The light burned magnesia and magnesium chloride are main raw materials of the magnesium oxychloride cement, and the magnesium oxychloride cement has strong bonding performance, is very easy to bond with various materials, can be quickly condensed and hardened under the normal-temperature and normal-pressure curing condition, and forms a product with higher strength. Compared with the traditional cementing materials (cement, lime and the like), the product has higher mechanical strength and shorter time for setting and hardening under the condition of the same mixing amount, so that the muck-based non-fired light heat-insulating material with higher strength can be prepared by adopting the magnesium oxychloride cement to cure the engineering muck, and the production period is shorter. The magnesium oxychloride cement is adopted to solidify the engineering muck to prepare the muck-based non-fired light heat-insulating material, the occupation ratio of the engineering muck is up to 50-80%, and the higher utilization ratio of the engineering muck is realized. However, the volume-weight ratio of the slag-based unfired solid building material product is relatively large (the volume weight of the press-molded product is 2000 kg/m) 3 About 1800kg/m of casting molding product 3 Left and right), can only be applied to bearing walls in building walls, thus limiting the application range of the bearing walls in the building walls. The invention reduces the volume weight of the slag-soil-based non-fired product by adding the inorganic light aggregate, and ensures that the slag-soil-based non-fired product has the functions of heat preservation and heat insulation, and the dry density of the slag-soil-based non-fired product is lower than 1000kg/m 3 The performance indexes such as dry density, thermal conductivity coefficient, compressive strength and the like can meet the relevant regulations of GB/T11968-2020 autoclaved aerated concrete block; meanwhile, the adopted raw materials are mainly inorganic materials, so that the residue soil-based non-fired light heat-insulating material has the advantage of fire resistance, the combustion performance grade is A grade, and the residue soil-based non-fired light heat-insulating material is a non-combustible material. Therefore, the residue soil-based baking-free light heat-insulating material can improve the fire safety of buildings.
In the embodiment, the engineering muck comprises 85 to 95 parts by dry weight, 15 to 65 parts by dry weight of inorganic light aggregate, 8 to 25 parts by dry weight of light-burned magnesia, 2 to 9 parts by dry weight of magnesium chloride, 5 to 8 parts by dry weight of polymer emulsion, 0.2 to 1.0 part by dry weight of fiber and 0.3 to 1.0 part by dry weight of modifier. The residue soil-based non-fired light heat-insulating material obtained by the proportion has higher compressive strength and lower heat conductivity coefficient under the condition of the same volume weight. More preferably, the engineering slag soil comprises 85 to 95 parts by dry weight of inorganic light aggregate 15 to 65 parts by dry weight of light burned magnesium oxide 10 to 20 parts by dry weight of inorganic light aggregate, 3 to 6 parts by dry weight of magnesium chloride, 5 to 8 parts by dry weight of polymer emulsion, 0.3 to 0.6 part by dry weight of fiber and 0.3 to 0.6 part by dry weight of modifier.
In this embodiment, the engineering muck is soil-like muck generated by excavation of a foundation pit or construction of an underground engineering. And/or the water content of the engineering muck is lower than 3 percent. The residue soil-based non-fired light heat-insulating material is prepared by taking engineering residue soil as a matrix material, wherein the engineering residue soil refers to soil-like residue soil. The slag-soil-based baking-free light thermal insulation material can be used for producing building thermal insulation materials such as thermal insulation blocks, thermal insulation boards and the like, and can be widely applied to thermal insulation of building walls. The water content of the engineering muck is lower than 3%. The main component of the engineering muck is clay which has high water content and high viscosity and is difficult to be uniformly mixed with other raw materials. After the engineering slag soil is air-dried or dried, the engineering slag soil is beneficial to carrying out crushing treatment and uniformly mixing with other raw materials.
In this embodiment, the inorganic lightweight aggregate is at least one of expanded perlite and vitrified micro beads. And/or the bulk density of the inorganic lightweight aggregate is not more than 120kg/m 3 . The inorganic light aggregate is at least one of expanded perlite and vitrified micro bubbles, and the expanded perlite and vitrified micro bubbles are taken as light aggregate, so that the inorganic light aggregate has the characteristics of light volume weight, small heat conductivity coefficient, no combustion, good durability and the like, can effectively reduce the volume weight of building material products, has the characteristics of good heat preservation, heat insulation, fire prevention and the like, and overcomes the defects of easy combustion of EPX and XPS plates, harmful gas generation at high temperature, poor aging resistance and weather resistance and the like. The inorganic lightweight aggregate has a bulk density of not more than 120kg/m 3 . The smaller the bulk density of the inorganic lightweight aggregate, the smaller the thermal conductivity thereof. When the inorganic lightweight aggregate bulk density is not more than 120kg/m 3 In the process, the residue soil-based baking-free light thermal insulation material with lower dry density grade and smaller heat conductivity coefficient can be prepared.
In this embodiment, the polymer emulsion is at least one of a VAE emulsion and a polyvinyl alcohol emulsion. And/or the solid content of the polymer emulsion is more than or equal to 50 percent. The VAE emulsion and the polyvinyl alcohol emulsion have good adhesive property, can improve the adhesive strength among raw materials, and can improve the mechanical strength of the residue soil-based baking-free light thermal insulation material under the synergistic action of the VAE emulsion and the polyvinyl alcohol emulsion and magnesium oxychloride cement; meanwhile, the VAE emulsion and the polyvinyl alcohol emulsion also have good film forming characteristics, and the formed polymer film can effectively block capillary pipelines and improve the waterproof performance of the residue soil-based baking-free light heat-insulating material. The solid content of the polymer emulsion is controlled to be more than or equal to 50 percent, so that the polymer emulsion can have better adhesive property and film-forming property.
In this embodiment, the fiber is at least one of a crop straw fiber and a polypropylene fiber. And/or the length of the fibers does not exceed 20mm. The fiber can improve the cracking resistance of the slag-soil-based non-fired light heat-insulating material and overcome the defect of large brittleness of a magnesium oxychloride cement product. The length of the fiber is not more than 20mm, and the fiber is favorably and uniformly dispersed in the mixture, so that the generation and the expansion of micro-cracks in the matrix are more effectively prevented, the cracking resistance of the product is improved, and the toughness of the product is obviously improved.
In this embodiment, the modifier is at least one of phosphate, sulfate, phosphoric acid, or silicon powder. The modifier can effectively inhibit the halogen return of the magnesium oxychloride cement product.
According to another aspect of the invention, the preparation method of the slag-soil based baking-free light thermal insulation material comprises the following steps:
s1, adding magnesium chloride into water, and uniformly stirring to obtain a magnesium chloride aqueous solution;
s2, adding a modifier into the magnesium chloride aqueous solution obtained in the step S1, and uniformly stirring to obtain a mixture A;
s3, uniformly stirring the inorganic light aggregate and the polymer emulsion, and then uniformly stirring the inorganic light aggregate, the light calcined magnesia and the fibers to obtain a mixture B;
s4, adding the mixture A obtained in the step S2 into the mixture B obtained in the step S3 in a spraying mode, and uniformly stirring to obtain a mixture C;
and S5, filling the mixture C obtained in the step S4 into a mold, adopting a pressure forming process, demolding, and curing to obtain the residue soil-based non-fired light heat-insulating material.
The residue soil-based baking-free light heat-insulating material is prepared by adding magnesium chloride into water to prepare a magnesium chloride aqueous solution, and then adding a modifier to prepare a mixture A; uniformly stirring inorganic light aggregate and polymer emulsion, and then uniformly stirring the inorganic light aggregate, the light calcined magnesia and the fibers to obtain a mixture B; adding the mixture A into the mixture B in a spraying manner, and uniformly stirring to prepare a mixture C; and (3) filling the mixture C into a mold, adopting a pressure forming process, demolding, and maintaining to obtain the residue soil-based baking-free light heat-insulating material. The inorganic lightweight aggregate and the polymer emulsion are uniformly stirred, so that the polymer emulsion is wrapped on the surface of the inorganic lightweight aggregate, the bonding strength between the inorganic lightweight aggregate and other raw materials can be improved, a formed polymer film can block capillary pipelines, and the waterproof performance of the residue soil-based baking-free lightweight heat-insulating material is improved. The mixture A is added into the mixture B in a spraying mode, the spraying mode is favorable for uniformly mixing the magnesium chloride aqueous solution and the modifier into the engineering muck, and the problem that the engineering muck is difficult to uniformly mix with other raw materials due to high viscosity is solved. The preparation process of the muck-based non-fired light heat-insulating material is simple, the required production field is small, and the production period is short; by adopting a sintering-free process, a large amount of energy can be saved, and the method is low-carbon and environment-friendly. Therefore, the preparation method of the residue soil-based non-fired light heat-insulating material has the characteristics of simple preparation process, non-sintering, low production investment and the like.
In this embodiment, the engineering slag soil in step S3 is crushed to have a particle size of less than 4.75 mm. The engineering slag soil usually contains large broken stones, and the particle size of the large broken stones influences the forming and the performance of products. The engineering slag soil is crushed by the double-roller machine, so that the particle size of the engineering slag soil is kept in a reasonable range, the homogeneity of the engineering slag soil particles is improved, and the stability of the performance of the slag soil-based baking-free light heat-insulating material is ensured. The magnesium oxychloride cement and the polymer emulsion are used as composite cementing materials, the expanded perlite and the vitrified micro bubbles are used as aggregates, and the engineering muck is used as a base material, so that the prepared muck-based non-fired light thermal insulation material is mainly used for producing building materials such as thermal insulation blocks, thermal insulation boards and the like, the size of the product is smaller, the particle size of engineering muck particles is controlled to be smaller than 4.75mm, and the product can be ensured to be easy to form and stable in performance.
In this example, the Baume degree of the magnesium chloride aqueous solution in step S1 was 22 to 30. The magnesium chloride is an important component material of magnesium oxychloride cement. The magnesium oxychloride cement is prepared by using light calcined powder obtained by calcining magnesite or ash (main component is MgO) obtained by calcining dolomite at low temperature, and using magnesium chloride hexahydrate (MgCl) 2 ·6H 2 O) and the like as a blending agent, and water is added thereto. The test result shows that the hydration product of magnesium oxychloride cement has 518 phase as main component and Mg (OH) 2 When the additive is used as a supplement, the properties of the hardened body are optimal. The baume degree of the magnesium chloride aqueous solution is 22-30 2 The mole ratio of (A) is 5-13, the 518 phase in the hydration product accounts for more, mg (OH) 2 The ratio is less, and the strength of a hardened body is higher.
In this example, the water content of the mixture C in step S4 is 6% to 18%. The optimal moisture content exists in the engineering muck mixture formed under pressure, the maximum dry density and the higher limit pressure can be obtained under the condition of the optimal moisture content, and then the muck-based baking-free light heat-insulating material with higher strength is obtained. Meanwhile, the optimum baume degree of the magnesium chloride is 22 to 30, and the water content of the mixture is also limited. Test results show that when the water content is 6-18%, the slag-soil-based unburned light heat-insulating material can be molded under high pressure to obtain a compact slag-soil-based blank, and magnesium chloride can react under a high baume degree to obtain a high-strength slag-soil-based unburned light heat-insulating material under physical and chemical synergistic effects.
In this embodiment, the molding pressure of the pressure molding process in step S5 is 5MPa to 15MPa. The pressure forming process is adopted, the ultimate pressure is different in different grain compositions and mixing ratios, and when the pressure exceeds the ultimate pressure, the reinforcing effect cannot be achieved, and the blank body can be damaged. The invention adopts the inorganic light aggregate to reduce the volume weight of the residue soil-based non-fired light heat-insulating material, so that the residue soil-based non-fired light heat-insulating material has the characteristics of heat insulation and heat insulation. However, since the compressive strength of the lightweight aggregate is low, when the molding pressure is too high, the porous structure is destroyed by excessive compression, resulting in a decrease in the thermal insulation performance of the residue-based non-fired lightweight thermal insulation material. Therefore, the optimal molding pressure is determined by comprehensively considering the mechanical strength and the heat conductivity coefficient of the muck-based unfired light thermal insulation material, and the molding pressure range is 5 MPa-15 MPa.
According to another aspect of the invention, the invention also provides application of the muck-based unfired light thermal insulation material in building thermal insulation building material products. The material is particularly applied to wall heat-insulating materials such as heat-insulating building blocks, heat-insulating plates and the like.
Examples
Example 1
The residue soil-based baking-free light heat-insulating material comprises the following components in parts by mass: 100 parts of engineering slag soil by dry weight, 15 parts of expanded perlite, 8 parts of light burned magnesium oxide, 2 parts of magnesium chloride, 3 parts of VAE emulsion, 0.4 part of crop straw fiber and 0.5 part of sodium phosphate.
The preparation method of the slag-based baking-free light thermal insulation material comprises the following steps:
s1, adding magnesium chloride into water, and uniformly stirring to obtain a magnesium chloride solution with a Baume degree of 22;
s2, adding sodium phosphate into the magnesium chloride solution obtained in the step S1, and uniformly stirring to obtain a mixture A;
s3, firstly, drying or air-drying the engineering muck until the water content is lower than 3%, crushing the engineering muck until the particle size is smaller than 4.75mm, then uniformly stirring the expanded perlite and the VAE emulsion, and then uniformly stirring the expanded perlite, the light burned magnesium oxide and crop straw fibers to prepare a mixture B;
s4, adding the mixture A obtained in the step S2 into the mixture B obtained in the step S3 in a spraying mode, and uniformly stirring to obtain a mixture C, wherein the water content of the mixture C is 10%;
and S5, filling the mixture C obtained in the step S4 into a mold, forming in a hydraulic press with the pressure of 12MPa, and naturally curing after demolding to obtain the residue soil-based baking-free light heat-insulating material.
Example 2
The residue soil-based baking-free light heat-insulating material comprises the following components in parts by mass: 100 parts of engineering slag soil by dry weight, 24 parts of expanded perlite, 12 parts of light burned magnesium oxide, 4 parts of magnesium chloride, 5 parts of polyvinyl alcohol emulsion, 0.6 part of polypropylene fiber and 0.6 part of phosphoric acid.
The preparation method of the slag-based baking-free light thermal insulation material comprises the following steps:
s1, adding magnesium chloride into water, and uniformly stirring to obtain a magnesium chloride solution with a Baume degree of 25;
s2, adding phosphoric acid into the magnesium chloride solution obtained in the step S1, and uniformly stirring to prepare a mixture A;
s3, firstly, drying or air-drying the engineering muck until the water content is lower than 3%, then crushing the engineering muck until the particle size is smaller than 4.75mm, then uniformly stirring the expanded perlite and the polyvinyl alcohol emulsion, and then uniformly stirring the expanded perlite, the light burned magnesium oxide and the polypropylene fiber to prepare a mixture B;
s4, adding the mixture A obtained in the step S2 into the mixture B obtained in the step S3 in a spraying mode, and uniformly stirring to obtain a mixture C, wherein the water content of the mixture C is 12%;
and S5, filling the mixture C obtained in the step S4 into a mold, forming in a hydraulic press with the pressure of 10MPa, and naturally curing after demolding to obtain the residue soil-based baking-free light heat-insulating material.
Example 3
The residue soil-based baking-free light heat-insulating material comprises the following components in parts by mass: 100 parts of engineering slag soil by dry weight, 42 parts of vitrified micro bubbles, 20 parts of light burned magnesium oxide, 6 parts of magnesium chloride, 8 parts of polyvinyl alcohol emulsion, 0.8 part of polypropylene fiber and 0.8 part of sodium phosphate.
The preparation method of the residue soil-based baking-free light heat-insulating material comprises the following steps:
s1, adding magnesium chloride into water, and uniformly stirring to obtain a magnesium chloride solution with a Baume degree of 30;
s2, adding sodium phosphate into the magnesium chloride solution obtained in the step S1, and uniformly stirring to obtain a mixture A;
s3, firstly, drying or air-drying the engineering muck until the water content is lower than 3%, crushing until the particle size is smaller than 4.75mm, then uniformly stirring the vitrified micro bubbles and the polyvinyl alcohol emulsion, and uniformly stirring the vitrified micro bubbles, the engineering muck, the light burned magnesium oxide and the polypropylene fiber to prepare a mixture B;
s4, adding the mixture A obtained in the step S2 into the mixture B obtained in the step S3 in a spraying mode, and uniformly stirring to obtain a mixture C, wherein the water content of the mixture C is 13%;
and S5, filling the mixture C obtained in the step S4 into a mold, forming in a hydraulic press with the pressure of 8MPa, and naturally curing after demolding to obtain the residue soil-based baking-free light heat-insulating material.
The dry density, compressive strength and thermal conductivity of the residue soil-based unfired light thermal insulation material prepared in the above examples 1, 2 and 3 were tested according to the test method of autoclaved aerated concrete block (GB/T11968-2020).
The test results are shown in table 1.
TABLE 1 test results of examples 1 to 3
As can be seen from Table 1, the addition of a proper amount of inorganic lightweight aggregate can significantly reduce the volume weight of the slag-based non-fired product, and make the slag-based non-fired product have good heat preservation and heat insulation properties. With the increase of the mixing amount of the inorganic light aggregate, the dry density and the heat conductivity coefficient of the residue soil-based unfired light heat-insulating material are gradually reduced, the compressive strength is reduced, but the compressive strength and the heat conductivity coefficient of the residue soil-based unfired light heat-insulating material are superior to the requirements of dry density grades B04, B05 and B06 in autoclaved aerated concrete Block (GB/T11968-2020) on the compressive strength and the heat conductivity coefficient. Therefore, the engineering muck is used as a matrix material, the inorganic light aggregate is used as an aggregate, the magnesium oxychloride cement and the polymer emulsion are used as a composite cementing material, and the prepared muck-based unfired light heat-insulating material has the characteristics of light weight, heat preservation and heat insulation, has the advantage of fire resistance because the main raw materials are inorganic materials, can meet the requirements of wall heat preservation and heat insulation, can improve the fire resistance safety of buildings, and has wide application prospects. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The residue soil-based baking-free light heat insulation material is characterized by comprising the following components in parts by mass:
80-100 parts of engineering muck by dry weight, 15-65 parts of inorganic light aggregate, 5-30 parts of light calcined magnesia, 1-15 parts of magnesium chloride, 3-10 parts of polymer emulsion, 0.2-1.5 parts of fiber and 0.1-1.5 parts of modifier;
wherein the polymer emulsion adopts at least one of VAE emulsion and polyvinyl alcohol emulsion; the solid content of the polymer emulsion is more than or equal to 50 percent;
the preparation method of the muck-based unfired light thermal insulation material comprises the following steps:
s1, adding magnesium chloride into water, and uniformly stirring to obtain a magnesium chloride aqueous solution;
s2, adding a modifier into the magnesium chloride aqueous solution obtained in the step S1, and uniformly stirring to obtain a mixture A;
s3, uniformly stirring the inorganic light aggregate and the polymer emulsion, and then uniformly stirring the inorganic light aggregate, the light calcined magnesia and the fibers to obtain a mixture B;
s4, adding the mixture A obtained in the step S2 into the mixture B obtained in the step S3 in a spraying mode, and uniformly stirring to obtain a mixture C;
and S5, filling the mixture C obtained in the step S4 into a mold, adopting a pressure forming process, demolding, and curing to obtain the residue soil-based non-fired light heat-insulating material.
2. The muck-based unfired lightweight thermal insulation material according to claim 1, wherein,
85 to 95 portions of engineering muck by dry weight, 15 to 65 portions of inorganic light aggregate, 8 to 25 portions of light calcined magnesia, 2 to 9 portions of magnesium chloride, 5 to 8 portions of polymer emulsion, 0.2 to 1.0 portion of fiber and 0.3 to 1.0 portion of modifier.
3. The muck-based unburned light-weight thermal insulation material according to claim 1 or 2,
the engineering muck is soil muck generated by foundation pit excavation or underground engineering construction; and/or the presence of a gas in the gas,
the water content of the engineering muck is lower than 3 percent.
4. The muck-based unburned light-weight thermal insulation material according to claim 1 or 2,
the inorganic lightweight aggregate adopts at least one of expanded perlite and vitrified micro bubbles; and/or the presence of a gas in the gas,
the inorganic lightweight aggregate has a bulk density of not more than 120kg/m 3 。
5. The muck-based unburned light-weight thermal insulation material according to claim 1 or 2,
the fiber is at least one of crop straw fiber and polypropylene fiber; and/or the presence of a gas in the atmosphere,
the length of the fibers does not exceed 20mm; and/or the presence of a gas in the atmosphere,
the modifier is at least one of phosphate, sulfate, phosphoric acid or silicon powder.
6. The muck-based unfired light-weight thermal insulation material as claimed in claim 1,
the Baume degree of the magnesium chloride aqueous solution in the step S1 is 22-30; and/or
And in the step S3, the engineering muck is crushed to have a particle size of less than 4.75 mm.
7. The muck-based unfired lightweight thermal insulation material according to claim 1, wherein,
in the step S4, the water content of the mixture C is 6-18%; and/or
And in the step S5, the forming pressure of the pressure forming process is 5-15 MPa.
8. Use of the residue soil-based unfired lightweight thermal insulation material according to any one of claims 1 to 7 in a building thermal insulation building material product.
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