Functionally-graded cellular-concrete thermal-insulating material and preparation method thereof

A foamed concrete and functional gradient technology, used in thermal insulation, ceramic products, other household appliances, etc., can solve the problems of large internal stress, obvious interlayer interface, low strength of foamed concrete, etc. The effect of improving surface strength

Active Publication Date: 2012-07-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low strength, obvious interlayer interface and large internal stress of foamed concrete in the existing technology, the present invention provides a functional gradient foamed concrete insulation material and a preparation method thereof, which is a low-cost, Functionally gradient foam concrete insulation material with light weight, high strength, thermal insulation, heat insulation, fire prevention, stable volume, energy saving, and no pollution to the environment

Method used

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  • Functionally-graded cellular-concrete thermal-insulating material and preparation method thereof
  • Functionally-graded cellular-concrete thermal-insulating material and preparation method thereof
  • Functionally-graded cellular-concrete thermal-insulating material and preparation method thereof

Examples

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Embodiment 1

[0035] Example 1 The manufacturing method of the functional gradient foam concrete thermal insulation material is to make the foam concrete thermal insulation inner core by using inorganic gelling material, chemical foaming agent and foam stabilizer as the pore forming components, and then wrap the outer surface of the foam concrete thermal insulation core with fast Hard inorganic gelling materials, chemical foaming agents, and foam stabilizers are made of pore-forming components. The pore diameter increases continuously from 0.1 to 8mm from the surface to the inside, and the porosity increases from 35% to 95% from the surface to the inside. A functionally graded layer with a thickness of 5mm that increases continuously through the gradient.

[0036] Among them, the raw materials of the foam concrete thermal insulation core are: 100 parts of inorganic gelling material, 5 parts of foaming agent, 0.1 part of foam stabilizer, 1 part of fiber reinforcing material, 3 parts of ...

Embodiment 2

[0041] Example 2 The manufacturing method of the functional gradient foam concrete insulation material is to first make the foam concrete insulation inner core by using inorganic gelling material, physical foam agent and foam stabilizer as the pore forming components, and then wrap the outer surface of the foam concrete insulation inner core with rapid hardening Type inorganic gelling material, chemical foaming agent, and foam stabilizer are made of pore-forming components. The pore diameter increases continuously from 0.2 to 6mm from the surface to the inside, and the porosity continues from 5% to 90% from the surface to the inside. A functionally graded layer with a gradient height of 20 mm.

[0042] Among them, the raw materials of the foam concrete insulation core are calculated by mass percentage: 100 parts of inorganic gelling material, 0.5 part of foaming agent, 0.01 part of foam stabilizer, 0.05 part of fiber reinforcement material and 5 parts of industrial waste ...

Embodiment 3

[0046] Example 3 The manufacturing method of the functional gradient foam concrete insulation material is to first make the foam concrete insulation inner core by using inorganic gelling material, chemical foaming agent and foam stabilizer as the pore forming components, and then wrap the outer surface of the foam concrete insulation inner core with fast Hard inorganic gelling materials, physical foaming agents, and foam stabilizers are made of pore-forming components. The pore diameter increases continuously from the surface to the inside from 0.1 to 5 mm, and the porosity continues from 8% to 85% from the surface to the inside. Functionally graded layers with increasing gradient thickness of 3mm.

[0047] Among them, the raw materials of the foam concrete thermal insulation core are: 100 parts of inorganic gelling material, 12 parts of foaming agent, 0.15 parts of foam stabilizer, 2 parts of fiber reinforcing material, 5 parts of waterproofing agent and 50 parts of indu...

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Abstract

The invention relates to a functionally-graded cellular-concrete thermal-insulating material and a preparation method thereof. The functionally-graded cellular-concrete thermal-insulating material comprises a cellular-concrete thermal-insulating core, a plurality of air holes are uniformly distributed in the thermal-insulating material, and the surface of the cellular-concrete thermal-insulating core is wrapped with a functionally-graded layer; in the air holes of the functionally-graded cellular-concrete thermal-insulating material, the air hole in the cellular-concrete thermal-insulating core has a maximum diameter, then, the diameters and porosities of the air holes from the cellular-concrete thermal-insulating core to the outside are in a continuous graded change in a descending order, the thickness of the functionally-graded layer is 0.1-20 mm, the porosities of the air holes are in a continuous graded change in a range of 1- 95%, and the diameters of the air holes are in a continuous graded change in a range of 0.1-8 mm. According to the invention, the interior of the material is porous and thermal-insulating, and the surface of the material is high in density and strength, the mechanical strength of the material is gradually improved from the inside to the outside, and the thermal conductivity factor of the material is gradually reduced front the outside to the inside, thereby achieving an effect of integrating light weight, high strength, thermal insulation and fire prevention.

Description

technical field [0001] The invention relates to a high-performance ultra-light foam cement concrete in the technical field of construction engineering, in particular to a functional gradient foam concrete insulation material and a manufacturing method thereof. Background technique [0002] The current domestic popular building insulation material polystyrene foam board, because it is a flammable product, has repeatedly occurred serious fire accidents during construction and use, causing huge casualties and property losses. The relevant state departments have ordered a ban Use organic and flammable foam insulation boards such as polystyrene, polyplastic board, polyurethane, etc. Inorganic foam concrete is a kind of building energy-saving insulation material with excellent fire performance, and has become one of the most promising alternatives to organic flammable insulation materials such as polystyrene foam. Its manufacturing method is to use ordinary Portland cement or sulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/76E04B1/94C04B38/02
Inventor 余红发王常清麻海燕王炳南
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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