Fiber aerogel foam concrete, preparation method and application thereof

Abstract

The invention discloses fiber aerogel foam concrete, a preparation method and application thereof. The fiber aerogel foam concrete disclosed by the invention comprises the following raw materials: binding materials, aerogel powder, cellosilk, viscous water, a foaming agent and water, wherein the mass ratio of the binding materials to aerogel powder to cellosilk to viscous water is 1: (0.01-0.3):(0.001-0.01):(0.35-1); the particle size of the aerogel powder is smaller than 250 microns, the porosity is 80-99%, and the pore diameter is 10-50nm; the cellosilk is uniformly distributed, and the diameter is 10-50 microns. The fiber aerogel foam concrete disclosed by the invention has the advantages of ultralow density, ultralow heat conductivity and excellent thermal insulation, can be applied tothe fields of thermal insulation of building walls, road filling, barrier sound insulation, and has wide application prospect.

Description

technical field [0001] The invention belongs to the field of light-weight, thermal insulation materials, and in particular relates to a fiber airgel foam concrete and its preparation method and application. Background technique [0002] With the rapid development of social economy and the continuous increase of human demand for energy, improving energy utilization and realizing energy saving and environmental protection have become research hotspots at home and abroad. At the same time, the speed of urbanization has accelerated, and the scale of construction in my country has continued to increase. The report shows that by the end of 2016, the total construction area of ​​my country has been 54.5 billion m 2 , with a building area under construction of 12 billion m 2 At the same time, building energy consumption will continue to rise. According to the research of the Department of Science and Technology of the Ministry of Construction, the total energy consumption of buil...

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Problems solved by technology

[0006] Since the formability of foam concrete is difficult to guarantee when the foam content is too large, it is difficult to reduce the self-weight of foam concrete simply by increasing the amount of foam.

The literature "The effect of airgel ratio on the pore structure and performance of foamed concrete" prepares airgel foamed concrete, and the density and thermal conductivity of foamed concrete can be effectively reduced by adding ultra-low, super-insulated airgel powder, but At the same time, the combination of airgel and cement is not high, and the foamed concrete has the disadvantages of uneven pore size and low strength, and it is difficult to obtain ultra-light foamed concrete with good mechanical properties; the Chinese invention patent with application number 201610214836.0 involves A fiber felt-reinforced airgel foam concrete and its preparation method are disclosed. The airgel foam concrete slurry is prepared by modifying the hydrophobic airgel powder, and then the airgel foam concrete slurry is infiltrated into the fiber felt. superior

This technology effectively improves the strength of airgel foam concrete, but the airgel powder needs to be treated with hydrophobic modification first, and the preparation process is more complicated; The fluidity is too poor, and the compounding with the fiber mat is not uniform enough, so it is difficult to obtain high-performance ultra-light foam concrete

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