Heat-insulating concrete containing aerogel grains and preparation method thereof

Abstract

The invention discloses heat-insulating concrete containing aerogel grains and a preparation method thereof. The heat-insulating concrete containing the aerogel grains is characterized by being prepared from the following components in parts by weight: 10 to 50 parts of portland cement, 0.1 to 5 parts of the aerogel grains, 0 to 50 parts of vitrified micro-beads, 0 to 40 parts of fly ash, 0.5 to 10 parts of a dispersion auxiliary agent, 1 to 10 parts of redisperable adhesive powder, 1 to 10 parts of cellulose ether, 0 to 10 parts of anti-cracking fibers and 40 to 100 parts of water, wherein the aerogel grains are strengthened aerogel grains. According to the heat-insulating concrete disclosed by the invention, a preparation process is relatively simple and a heat insulation effect of an aerogel material is kept to the greatest extent; after cement is cured and dried, the concrete has waterproof performance. Furthermore, the strengthened aerogel grains have relatively high strength and are not easily broken; a cement product which takes the strengthened aerogel grains as heat-insulating filling has higher compression-resisting and anti-cracking degrees.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a heat-insulating concrete and a preparation method thereof. Background technique [0002] Concrete is widely used in modern buildings. Insulating concrete made by mixing lightweight thermal insulation materials into cement has the advantages of convenient construction and fire prevention. Compared with external insulation materials such as extruded polystyrene boards and rock wool boards, thermal insulation concrete has no joints or anchors during construction, thereby reducing thermal bridges and effectively reducing the risk of falling off. Therefore, it has become a widely used Welcome building insulation materials. The thermal insulation components used in traditional thermal insulation concrete are mainly vitrified microbeads, expanded perlite, etc. The thermal insulation concrete containing these materials is cheap, but the thermal conductivity is generally h...

AI Technical Summary

Problems solved by technology

The density of airgel is very low, and the bonding force between the elements that make up the gel skeleton is weak, so its own strength is poor

Therefore, the thermal insulation concrete made of airgel generally has problems such as poor adhesion, easy pulverization, and poor compressive strength, which greatly restricts its practicability.

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