Thermal-insulation and fire-proof plate made of aerogel foamed concrete and provided with decorative surface and preparation method of thermal-insulation and fire-proof plate

Abstract

The invention provides a thermal-insulation and fire-proof plate made of aerogel foamed concrete and provided with a decorative surface and a preparation method of the thermal-insulation and fire-proof plate. The thermal-insulation and fire-proof plate is prepared from the aerogel foamed concrete, a transition layer and a facing layer, wherein the aerogel foamed concrete is prepared from aerogel powder and foamed concrete, the aerogel powder comprises an inner hydrophobic layer and a surface hydrophilic layer, and the thickness of the surface hydrophilic layer is 0.1-100 mu m. The preparation method of the thermal-insulation and fire-proof plate main comprises steps as follows: aerogel powder modification, dry blending-wet blending, foaming, molding, curing, transition layer coating and facing layer preparation. The thermal-insulation and fire-proof plate made of the aerogel foamed concrete and provided with the decorative surface has excellent properties such as low density, low heat conductivity coefficient, low water absorption, sound insulation, integration of thermal insulation, decoration and fireproofing and the like, construction processes are reduced, construction cost is reduced, the problem that construction quality is difficult to control is solved, and the application prospect is broad.

Description

technical field [0001] The invention relates to a preparation method of a building thermal insulation fireproof material, in particular to an airgel foam concrete thermal insulation fireproof board with a decorative surface and a preparation method thereof, belonging to the fields of light weight, heat insulation, fireproof, sound insulation materials and the like. Background technique [0002] With the progress of society, problems such as energy crisis and environmental degradation are becoming more and more serious. In 2006, the "Outline of the Eleventh Five-Year Plan for National Economic and Social Development" put forward the concept of "energy saving and emission reduction" for the first time. %, and the binding target of reducing the total discharge of major pollutants by 10%. "Energy saving" promotes "emission reduction". In the total energy consumption of domestic production, building energy consumption accounts for 33%. Building energy conservation is the top pri...

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Problems solved by technology

[0006] However, the following technical bottlenecks are encountered in the development of airgel foam concrete insulation and fireproof boards with decorative surfaces: (1) Due to the large difference in density between airgel powder and concrete, during the mixing process, it is easy to appear between the two The phenomenon of phase separation makes it difficult for airgel to be evenly distributed in the concrete system, resulting in a serious decline in the mechanical properties of foamed concrete, and the improvement in thermal insulation performance is not obvious; (2) During the preparation of foamed concrete, the airgel nanoporous structure is extremely easy Destroyed by water in concrete and additives in cement raw materials, it loses the excellent thermal insulation performance of airgel due to the nanoporous structure; (3) The interface between airgel and cementitious materials is often due to low interface strength. The mechanical properties of foamed concrete are significantly reduced, and it is easy to cause airgel powder to fall off from the concrete matrix, seriously affecting the engineering application of foamed concrete; (4) The interface strength between the airgel foamed concrete slab and the facing layer is low, and the decorative The surface layer is prone to hollowing, cracking, falling off, etc.

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