Calcium sulfate whisker aerogel foam concrete and preparation method thereof

Abstract

The invention discloses calcium sulfate whisker aerogel foam concrete and a preparation method thereof. The calcium sulfate whisker aerogel foam concrete comprises cementing materials, aerogel powder,calcium sulfate whiskers, thickening agents, foaming agents and water, the weight ratio of the cementing materials, the aerogel powder to the calcium sulfate whiskers is 1:(0.01-0.3):(0.001-0.01), the diameter of the calcium sulfate whiskers is 1-10 micrometers, the long-diameter ratio of the calcium sulfate whiskers is 10-500, low-cost calcium sulfate whiskers are mixed into an aerogel foam concrete substrates, calcium sulfate whiskers with high long-diameter ratio have high flexibility and are high in bonding efficiency, so that expansion of cracks of the aerogel foam concrete substrates can be decreased, mechanical property and block forming property of the aerogel foam concrete are remarkably improved, and a preparation process is simplified, and the concrete can be widely applied tothe field of heat insulation of building walls, filling of roads, sound insulation of barriers and the like.

Description

technical field [0001] The invention belongs to the field of civil construction and thermal insulation materials, and in particular relates to a calcium sulfate whisker airgel foam concrete and a preparation method thereof. Background technique [0002] Foam concrete is an energy-saving and environment-friendly wall insulation material. It has the characteristics of low density, good thermal insulation, strong sound insulation and fire resistance, and excellent earthquake resistance. It is widely used in building energy conservation and other fields. However, lightweight foam concrete also has certain limitations, such as low strength, water absorption and cracking. [0003] With the rapid development of foam concrete, new types of foam concrete mixed with various external materials have appeared on the market, and airgel foam concrete is the lightest foam concrete; airgel is a lightweight porous, Amorphous solid material with super thermal insulation performance, the incor...

AI Technical Summary

Problems solved by technology

Patent CN 205804646 U proposes an airgel foam concrete insulation and fireproof board, which has low density, low thermal conductivity, and low water absorption, but the interface strength between airgel and cementitious materials is often low, resulting in foam concrete The mechanical properties are significantly reduced, and it is easy to cause the airgel powder to fall off from the concrete matrix, which seriously affects the engineering application of foam concrete

In the literature "Preparation and Performance Experimental Research of Lightweight Low Thermal Conductivity Airgel Foam Concrete", a density of 270.2kg / m 3 , Ultra-light foam concrete with a thermal conductivity of 0.069W / (m.K), but the foam concrete produced has disadvantages such as uneven pore size and low strength, and it is difficult to obtain ultra-light foam concrete with high mechanical properties

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