Sandwich integrated external wall insulation board and preparation method thereof

Abstract

The invention relates to a sandwich integrated external wall insulation board which comprises a cement shell and a heat insulation core material. The cement shell is a flat hexahedron, and a filling space of the heat insulation core material is formed in the hexahedron. The cement shell is formed by cement paste through injection molding and curing, and the cement paste comprises the following components, by mass: 20-60% of cement, 30-70% of quartz sand, 0.1-10% of microbeads, 0.01-2% of a water reducing agent, 0.01-2% of lithium carbonate, 0.01-2% of sodium gluconate, 0.01-2% of glass fibersand 0.1-6% of a low-temperature water-based emulsion; water is added into the components to be mixed to obtain cement paste, the water-binder ratio is 0.25-0.5, and the cement-sand ratio is 0.25-0.7.The shell adopts an innovative cement paste formula, and enough breaking strength and compressive strength can be provided under the condition of extremely small thickness after curing. According to the invention, the insulation board has very high breaking strength and compressive strength, and the insulation board with lighter specific gravity and better thermal insulation performance can be obtained; and the shell blocks environmental factors, plays a role in protecting the thermal insulation material, can prolong the service life of the thermal insulation material and provides fireproof and flame-retardant effects.

Description

technical field [0001] The invention relates to the technical field of inorganic building boards, in particular to a sandwich integrated exterior wall insulation board and a preparation method thereof. Background technique [0002] The external thermal insulation system of the building exterior wall is a non-load-bearing thermal insulation structural assembly composed of thermal insulation boards, protective layers, and fixing materials and suitable for installing the external surface of the external wall. At present, the insulation boards used in the market are divided into inorganic insulation boards and organic insulation boards. Organic insulation boards have better insulation performance, light specific gravity, and are easy to manufacture. However, compared with inorganic insulation boards, organic insulation boards have poor stability and are flame retardant. Poor performance, not resistant to aging and easy to deform; inorganic insulation board contains perlite, diat...

AI Technical Summary

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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