Aerogel and foamed concrete block and preparation method thereof

Abstract

The invention discloses an aerogel and foamed concrete block. The aerogel and foamed concrete block is characterized by being prepared from aerogel and foamed concrete which contains aerogel powder and foamed concrete, wherein the aerogel powder contains an internal hydrophobic layer and a surface hydrophilic layer, and the surface hydrophilic layer is 0.1-100 mu m thick. The preparation method of the aerogel and foamed concrete block comprises the following steps: (1) modifying the aerogel powder; (2) performing dry mixing on the aerogel powder obtained in the step (1) and a cementing material, and adding water for wet mixing; 3) mixing and stirring the wet mixture obtained in the step (2) with a foaming agent; (4) forming the wet mixture obtained in the step (3). A thermal-insulation wall built from the aerogel and foamed concrete block has more outstanding tensile stress resistance, crack resistance and anti-seepage performance, and can be widely applied to exterior walls, self-insulating walls and other fields of green buildings, buildings with ultra-low energy consumption and buildings with nearly zero energy consumption.

Description

technical field [0001] The invention relates to a building material, in particular to an airgel foam concrete block and a preparation method thereof. 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%. It can be seen that building energy saving is the top priority of energy saving and emission reduction. According to statistics, the heat loss of the wall structure is relatively the highest, and taking thermal insulation measures for the wall is a key step fo...

AI Technical Summary

Problems solved by technology

[0006] Building blocks generally use right-angled hexahedral rectangular blocks, and the left and right adjacent blocks can only be bonded by the mortar in the vertical joints. The mortar in the vertical joints is easy to lose, which affects the bonding strength and reduces the leakage resistance of the wall. , tensile stress and other properties

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