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Dry-mixed thermal insulation mortar and preparation method and use method thereof

A technology of thermal insulation mortar and dry mixing, applied in the field of materials, can solve the problems of reducing aerogel content, easy dissipation, poor comprehensive thermal insulation performance of aerogel mortar, etc.

Active Publication Date: 2020-10-23
响水华夏特材科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of airgel added in the above-mentioned disclosed patent documents is relatively low, and sand or lightweight aggregate (diatomaceous earth, fly ash, etc.) Added in the form of powder, during the mixing and dispersing process, the ultra-low density airgel powder is easy to escape, further reducing the content of airgel, resulting in poor comprehensive thermal insulation performance of the final airgel mortar

Method used

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  • Dry-mixed thermal insulation mortar and preparation method and use method thereof
  • Dry-mixed thermal insulation mortar and preparation method and use method thereof
  • Dry-mixed thermal insulation mortar and preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Preparation of continuously graded airgel particles:

[0057] (1) Ethyl orthosilicate, methyl triethoxysilane, ethanol, and water are mixed according to the molar ratio of 1:0.3:14:5, acid is added to adjust pH=4.5, after hydrolysis for 30 minutes, alkali is added to adjust pH=8.9 , let the gel stand for 2h.

[0058] (2) After the gel obtained in (1) is broken into fragments smaller than 10 cm, it is transferred to a supercritical drying kettle for drying.

[0059] (3) Ethanol supercritical drying process: after ethanol submerges the fragments, pressurize nitrogen to 0.3MPa, heat to 270°C, control the pressure to 16MPa, keep constant temperature and pressure for 2 hours, and then release the pressure to normal pressure at constant temperature, after cooling and discharging That is, airgel fragments are obtained.

[0060] (4) After the airgel fragments obtained in (3) are crushed by a crusher until the particle diameter is not greater than 2mm, sieve, and 30% of the co...

Embodiment 2

[0064] Preparation of continuously graded airgel particles:

[0065] (1) Ethyl orthosilicate, methyl triethoxysilane, ethanol, and water are mixed according to the molar ratio of 1:0.2:16:5, acid is added to adjust pH=4.7, after hydrolysis for 30 minutes, alkali is added to adjust pH=8.5 , let the gel stand for 3h.

[0066] (2) After the gel obtained in (1) is broken into fragments smaller than 10 cm, it is transferred to a supercritical drying kettle for drying.

[0067] (3) Ethanol supercritical drying process: after ethanol submerges the fragments, pressurize nitrogen to 0.3MPa, heat to 270°C, control the pressure to 16MPa, keep constant temperature and pressure for 2 hours, and then release the pressure to normal pressure at constant temperature, after cooling and discharging That is, airgel fragments are obtained.

[0068] (4) After the airgel fragments obtained in (3) are crushed by a crusher until the particle diameter is not greater than 2mm, sieve, and 25% of the co...

Embodiment 3

[0072] A dry-mix thermal insulation mortar, which is similar to Example 1, except that the content of continuously graded airgel composite particles is 7 parts.

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Abstract

The invention provides dry-mixed thermal insulation mortar which is prepared from the following raw materials in parts by weight: 9-18 parts of continuously graded aerogel composite particles, 1-2 parts of an inorganic cementing material and 0.05-0.1 part of compound latex powder. The dry-mixed thermal insulation mortar provided by the invention is based on aerogel particles as a thermal insulation functional filler. The continuously graded aerogel composite particles are obtained by coarse crushing, grading and model selection of blocky aerogel. The aerogel particles are used as the only thermal insulation filler of the dry-mixed thermal insulation mortar, the volume ratio is up to 60-95%, the stacking density of the dry-mixed thermal insulation mortar is 140-300g / L, the dry density of the mortar after molding is 180-350g / L, the normal-temperature heat conductivity coefficient is 0.04-0.06 W / (m.K), and A-grade fire prevention is realized.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a dry-mixed thermal insulation mortar, a preparation method and a use method thereof. Background technique [0002] With the growth of the global economy, the energy consumption in the world is increasing day by day. Energy conservation has become one of the most important issues in today's society. Reducing energy consumption and reducing environmental pollution are also very important in economic and social development. One of the ways to reduce energy consumption is to choose excellent thermal insulation materials and appropriate thermal insulation structures. [0003] As the lightest solid in the world, airgel has a thermal conductivity of less than 0.010W / (m K), which is currently the material with the lowest thermal conductivity in the world. The advantage of good water repellency. Airgel composite coils and sheets produced by combining airgel and reinforcing fibers a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/28
CPCC04B28/04C04B2111/28C04B2201/20C04B2201/32C04B2201/50C04B14/064C04B24/383C04B2103/0057C04B38/08
Inventor 陈勇段国栋陈世忠王恒谢江张勇刘伟元王浩浩赖德林
Owner 响水华夏特材科技发展有限公司
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