Aerogel-containing gypsum material and preparation method thereof

Abstract

The invention discloses an aerogel-containing gypsum material and a preparation method thereof. The preparation method comprises the steps: uniformly mixing aerogel-containing coating gypsum, water, a thickener and an air-entraining agent, so as to form a uniformly-distributed-foam-state aerogel aqueous dispersion; uniformly mixing gypsum powder, a setting retarder and water so as to form a gypsum mixture of a standard-consistency state; uniformly mixing the gypsum mixture and the aerogel aqueous dispersion, so as to form an aerogel-containing size mixture; subjecting the aerogel-containing size mixture to hardening and drying, thereby obtaining the aerogel-containing gypsum material. The preparation method of the aerogel-containing gypsum material, disclosed by the invention, is simple and is easy in condition control, the problems during the preparation of aerogel-containing building materials in the prior art that aerogel dust flies, aerogel dispersion is non-uniform, and the like are solved, the coefficient of thermal conductivity of gypsum products can be greatly reduced, and the water resistance of the gypsum products can also be effectively improved.

Description

technical field [0001] The invention relates to a gypsum material, in particular to an aerogel-containing gypsum material and a preparation method thereof, belonging to the field of building materials. Background technique [0002] Gypsum and its products have microporous structure and heating dehydration performance, so they have excellent heat insulation, sound insulation and fire resistance functions. Compared with cement products, gypsum products have obvious advantages and are typical green building materials, especially in recent years. The reuse of by-product gypsum has gained huge economic and social benefits. However, the water resistance and thermal insulation properties of gypsum generally restrict the further development of gypsum products. [0003] The process of using traditional methods to reduce the thermal conductivity of gypsum materials and improve the water resistance of gypsum products is more complicated and will have a greater impact on the comprehens...

AI Technical Summary

Problems solved by technology

For example, CN102910870A provides a kind of nano-silicon airgel / vitrified microbead composite thermal insulation mortar, which is directly added to the mortar mixture by airgel powder, but it is difficult to compound the airgel powder and mortar mixture, and in the process Airgel powder will disperse into the surrounding environment

Another example, CN 105439505A reports a SiO 2 Airgel mortar and its preparation method, which is made of modified SiO by hydrophobic airgel and silane coupling agent 2 Airgel, and then mixed with mortar, but the airgel modified by this silane coupling agent is difficult to prepare, the cost is high, and the modified airgel cannot be stored for a long time

In addition, the performance of existing building materials mixed with airgel powder is limited compared with traditional building materials, and there are usually defects such as airgel is easy to separate from building materials, and the performance of each part is greatly different.

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