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Lightweight porous thermal insulation material and preparation method thereof

A thermal insulation and light-weight technology, which is applied in the production of ceramic materials, clay products, ceramic products, etc., can solve the problems of ineffective hazard reduction, threat to life safety, suffocating atmosphere, etc., and achieve obvious economic and environmental benefits , low thermal conductivity, and the effect of reducing production costs

Active Publication Date: 2018-09-04
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, organic thermal insulation materials are mostly resin materials. Compared with inorganic thermal insulation materials, this type of material has the advantages of small weight and good heat insulation ability, but the flame retardancy of this type of material is very poor, and it is easy to burn. Release a lot of heat, accompanied by smoke, dripping, etc., causing a large area of ​​fire, and during the combustion process, this material will release a large amount of smoke and toxic gases, resulting in a suffocating atmosphere, which poses a huge threat to the safety of personnel , so the application of this material will be greatly restricted, and the addition of various existing flame retardants has no obvious effect on reducing the harm of this type of material
Therefore, inorganic thermal insulation materials with better flame retardancy are favored by people, but the weight of such materials is too large, which largely limits the use of such materials in large buildings

Method used

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  • Lightweight porous thermal insulation material and preparation method thereof
  • Lightweight porous thermal insulation material and preparation method thereof
  • Lightweight porous thermal insulation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a lightweight porous thermal insulation material, the components of which are calculated by weight percentage as follows:

[0037] Construction waste: 45% to 80%; the preferred range is 48 to 75%.

[0038] Municipal solid waste incineration slag; 5-40%; the preferred range is 8-35%.

[0039] Fly ash: 5-40%; the preferred range is 5-35%.

[0040] Foaming agent 5% to 25%; the preferred range is 6 to 18%.

[0041] And auxiliary material 0.5~2%, preferred range is 0.6~1.2%, auxiliary material comprises foam stabilizer, flux, foam stabilizer 0.2~1.5%, preferred range is 0.3~1.0%, flux 0.2~1.5%, preferably The range is 0.3 to 1.0%.

[0042] More preferably, the construction waste is construction waste with a particle size of 0-5mm after sieving; the municipal solid waste incineration slag has undergone quality-based multi-stage resource utilization and has poor utilization effects. Currently, it can only be used as a filling Buried components; the...

Embodiment 2

[0046] This example provides a preparation method of a lightweight porous thermal insulation material, especially the preparation of a lightweight porous thermal insulation material by using waste as a raw material through calcining synthesis, that is, the preparation of light porous thermal insulation material from all waste A thermal material method comprising the steps of:

[0047] Step S1, mixing materials: the pretreated construction waste, municipal solid waste incineration slag, fly ash, foaming agent, foam stabilizer, and fluxing agent are combined according to a certain ratio and then transferred to a ball mill for material grinding.

[0048]Step S2, forming a billet: add the material that has been ground and passed through an 80-mesh sieve into a mixer, and the wet-mixed material after adding an appropriate amount of aqueous solution is pressed into a billet under a pressure of 10MPa-50MPa to obtain a billet.

[0049] Step S3, calcination: put the body obtained in st...

Embodiment 3

[0072] This embodiment provides a method for preparing a lightweight porous thermal insulation material, comprising the following steps:

[0073] Step S1, mixing materials: pretreated construction waste, municipal solid waste incineration slag, fly ash, foaming agent, foam stabilizer, and fluxing agent according to the ratio of 65%, 20%, 5%, 9%, and 0.6% respectively %, 0.4% of the proportion of compatibility, together with the insulation material cutting scrap into the ball mill for material grinding.

[0074] Step S2, forming a billet: put the material that has been ground and passed through an 80-mesh sieve into a blender, and add an appropriate amount of tap water to the wet-mixed material to press it into a billet under a pressure of 20 MPa to obtain a billet.

[0075] Step S3, calcination: put the green body obtained in step S2 into a kiln for calcination, after calcination, the product is naturally cooled, and the calcination is as follows: from room temperature to 500°...

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Abstract

The invention discloses a lightweight porous thermal insulation material and a preparation method thereof. The lightweight porous thermal insulation material comprises the following components in weight percentage: 45%-80% of construction waste, 5%-40% of municipal solid waste incineration slag, 5%-40% of fly ash, 5%-25% of a foaming agent and 0.5%-2% of auxiliary materials, wherein the auxiliarymaterials include 0.2%-1.5% of a foam stabilizer and 0.2%-1.5% of a fluxing agent. According to the preparation method, all the raw materials of the lightweight porous thermal insulation material arewastes and are easily available, the process is simple, the cost is low, solid wastes such as construction waste, municipal solid waste incinerator slag, fly ash and agricultural straw and husk are directly used as the raw materials, and the preparation process is simple. The porous thermal insulation material has high structural strength, low water absorption rate, low density and low thermal conductivity; the production cost of the foamed porous material is effectively lowered, the environment is protected, and a waste is turned into treasure, so as to achieve obvious economic and environmental benefits.

Description

technical field [0001] The invention belongs to the field of environmental protection and building material science, and in particular relates to a lightweight porous thermal insulation material and a preparation method thereof. Background technique [0002] Thermal insulation materials (thermal insulation materials) refer to materials that can block the transfer of heat flow. They are widely used in many fields, which can improve energy utilization and save energy, thereby promoting the reduction of pollutant emissions. This is of great significance for coping with the widespread and increasingly serious social and economic problems such as energy crisis and environmental pollution, and realizing sustainable economic and social development. [0003] At present, thermal insulation materials for buildings are roughly divided into inorganic thermal insulation materials, organic thermal insulation materials and organic and inorganic composite thermal insulation materials. Amon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/135C04B33/13C04B38/06
CPCC04B33/1305C04B33/131C04B33/1324C04B33/1352C04B33/1355C04B38/0675C04B2235/3217C04B2235/3284C04B2235/3409C04B2235/445C04B2235/447C04B2235/448C04B2235/6562C04B2235/77C04B2235/9607Y02P40/60
Inventor 李寅明
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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