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Thermal-insulation aerogel masonry mortar and preparation method thereof

A masonry mortar and airgel technology, which is applied in ceramic products, other household utensils, applications, etc., can solve the problem of airgel powder falling off, the decrease of mechanical properties of masonry mortar, and the density difference between airgel powder and concrete major issues

Active Publication Date: 2017-10-20
NANJING WEICAI NEW ENERGY TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the following technical bottlenecks are encountered in the development of airgel masonry mortar: (1) Due to the large difference in density between airgel powder and concrete, phase separation between the two is prone to occur during the mixing process, resulting in air It is difficult for the gel to be evenly distributed in the concrete system, resulting in a serious decline in the mechanical properties of the masonry mortar, and the improvement of the thermal insulation performance is not obvious; (2) During the preparation of the masonry mortar, the airgel nanoporous structure is easily destroyed by the Water and additives in cement raw materials are destroyed, and the excellent thermal insulation performance of airgel due to the nanoporous structure characteristics is lost; (3) The interface strength between airgel and cementitious materials is often low, resulting in the stickiness of masonry mortar. The binding properties and mechanical properties are significantly reduced, and it is easy to cause the airgel powder to fall off from the masonry mortar matrix

Method used

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  • Thermal-insulation aerogel masonry mortar and preparation method thereof
  • Thermal-insulation aerogel masonry mortar and preparation method thereof
  • Thermal-insulation aerogel masonry mortar and preparation method thereof

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preparation example Construction

[0022] A preparation method of airgel thermal insulation masonry mortar, comprising the following steps:

[0023] (1) Airgel powder modification;

[0024] (2) The airgel powder obtained in step (1) is dry mixed with the gelling material, and then wet mixed with water.

[0025] In addition, the step (2) of the present invention can also be to dry mix the gelling material, then add water to wet mix, and add the airgel powder obtained in step (1) during wet mixing.

[0026] In this way, the preparation method of the airgel heat-insulating masonry mortar of the present invention has the advantages of simple process, short process cycle, excellent thermal insulation performance, waste utilization and environmental protection, and is very suitable for industrial production.

[0027] One or more of propyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropyltriethoxysilane.

[0028] In this way, due to the existing airgel preparation method, the prec...

Embodiment 1

[0040] SiO was prepared using the following steps 2 Airgel thermal insulation masonry mortar:

[0041] (1) Detection of SiO to be treated using a contact angle meter 2 The contact angle between the surface of the airgel powder and water, the test result is 55°, and then SiO with a particle size of 56 μm 2 The airgel powder is placed in a vacuum heating furnace, and the weighed hexamethyldisilazane is placed in a vacuum heating furnace with a container, heated and vaporized, and hydrophobically modified for 1.5 hours to obtain hydrophobic SiO 2 Airgel powder, detection of hydrophobic SiO by contact angle meter 2 The contact angle between the surface of the airgel powder and water is 147°;

[0042] (2) At room temperature, weigh ethanol, n-hexane and deionized water at a mass ratio of 1:1:100, mix them evenly, and prepare a surface hydrophilic modification solution;

[0043] (3) According to hydrophobic SiO 2 The volume ratio of the airgel powder and the surface hydrophilic...

Embodiment 2

[0049] SiO was prepared using the following steps 2 Airgel thermal insulation masonry mortar:

[0050] (1) Detection of SiO to be treated using a contact angle meter 2 The contact angle between the surface of the airgel powder and water, the test result is 45°, and then SiO with a particle size of 0.1mm 2 The airgel powder is placed in a vacuum heating furnace, and the weighed trimethylchlorosilane is placed in a vacuum heating furnace with a container, heated and vaporized, and hydrophobically modified for 1.5 hours to obtain hydrophobic SiO 2 Airgel powder, detection of hydrophobic SiO by contact angle meter 2 The contact angle between the surface of the airgel powder and water is 146°;

[0051] (2) At room temperature, weigh fatty alcohol polyoxyethylene ether ammonium sulfate, n-hexane, acetone and deionized water according to the mass ratio of 1:0.4:0.4:130, mix them evenly, and prepare a surface hydrophilic modification solution;

[0052] (3) According to hydrophobic...

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Abstract

The invention discloses thermal-insulation aerogel masonry mortar and a preparation method thereof. The thermal-insulation aerogel masonry mortar is characterized by being prepared from aerogel powder and a cementing material, wherein the aerogel powder contains an internal hydrophobic layer and a surface hydrophilic layer, and the surface hydrophilic layer is 0.1-100 mu m thick. The preparation method of the thermal-insulation aerogel masonry mortar comprises the following steps: (1) modifying the aerogel powder; (2) performing dry mixing on the aerogel powder obtained in the step (1) and the cementing material, and adding water for wet mixing. The aerogel powder and masonry mortar are composited, so that the aerogel powder is evenly distributed in the masonry mortar on the premise that the nano-porous structure of the aerogel powder is retained. The aerogel masonry mortar can be used for cementing thermal-insulating blocks, reduces thermal bridges of walls and improves the thermal insulation property of the walls.

Description

technical field [0001] The invention relates to building masonry mortar and a preparation method thereof, in particular to an airgel heat-insulating masonry mortar and a preparation method thereof. Background technique [0002] Building energy conservation is of great significance to the sustainable development of human beings. The thermal insulation performance of the wall is an important index of building energy saving. At present, the insulation wall is mainly pasted with an insulation layer on the outside of the wall. The process is cumbersome. Most of the insulation materials are flammable, easy to smoke, and have a short life. The self-insulating wall is made of thermal insulation blocks, which has the advantages of simple process, convenient construction, high fire protection level, easy maintenance and reconstruction, and the same life as the building. [0003] The thermal insulation performance of self-insulating walls is determined by the thermal conductivity of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/08C04B28/04C04B20/12
CPCC04B20/12C04B28/04C04B2201/32C04B2201/50C04B14/06C04B22/064C04B24/383C04B16/02C04B24/2623C04B38/08C04B20/1051C04B20/1025
Inventor 卢锋
Owner NANJING WEICAI NEW ENERGY TECH
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