Sandwich integrated exterior wall insulation board and preparation method thereof

Abstract

The invention relates to a sandwich integrated external wall heat preservation board, which comprises a cement shell and a heat insulation core material. The cement shell is a flat hexahedron, and the interior of the hexahedron forms a filling space for the heat-insulating core material. The cement shell is molded and solidified by cement slurry. The cement slurry contains the following mass percentage components: cement 20-60%, quartz sand 30-70%, microbeads 0.1-10%, water reducing agent 0.01-2%, lithium carbonate 0.01-2%, sodium gluconate 0.01-2%, glass fiber 0.01-2%, and low-temperature water-based emulsion 0.1-6%; the aforementioned components are mixed with water to obtain cement slurry, wherein the water-binder ratio is 0.25-0.5, and the cement-sand ratio is 0.25-0.7. The shell uses an innovative grout formulation that cures to provide sufficient flexural and compressive strength at extremely thin thicknesses. The invention not only makes the thermal insulation board have high flexural strength and compressive strength, but also helps to obtain a thermal insulation board with lighter specific gravity and better thermal insulation performance; the outer shell blocks environmental factors and protects the thermal insulation material , can prolong the service life of the heat insulation material and provide fire retardant effect.

Description

technical field [0001] The invention relates to the technical field of inorganic building boards, in particular to a sandwich-integrated external wall thermal insulation board and a preparation method thereof. Background technique [0002] The external thermal insulation system for building exterior walls is a non-load-bearing thermal insulation structural assembly composed of thermal insulation boards, protective layers, and fixing materials, and is suitable for installing external surfaces of external walls. At present, the thermal insulation boards used in the market are divided into inorganic thermal insulation boards and organic thermal insulation boards. Organic thermal insulation boards have better thermal insulation performance, light specific gravity, and are easy to manufacture. However, compared with inorganic thermal insulation boards, organic thermal insulation boards have poor stability and flame retardant. Poor resistance to aging, easy to deform; inorganic th...

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Problems solved by technology

This will lead to: first, it is easy to contact with moisture in the environment and get wet, which will lead to the failure of the insulation performance of the insulation material, and the volume expansion will easily cause the debonding of the insulation material and the cement board, and the freezing and frosting in winter will also accelerate cracking and failure

Second, it will reduce the fire rating

Third, the exposed insulation materials such as rock wool will pollute the environment and affect the health of construction workers

Fourth, the transportation process is also easy to damage the insulation board

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