Inorganic lightweight aggregate insulation board and preparation method thereof

Abstract

The invention relates to the field of building thermal insulation materials, and discloses an inorganic lightweight aggregate insulation board and a preparation method thereof. The insulation board is prepared from the following raw materials in parts by weight: 390 to 410 parts of modified expanded perlite, 90 to 110 parts of Portland cement, 25 to 28 parts of waterproof glue, 1.1 to 1.5 parts of curing powder, 0.3 to 0.5 part of polypropylene fibers and 1 to 2 parts of water, wherein the surface of the modified expanded perlite is coated with a hydrophobic layer, and the hydrophobic layer is externally grafted with alkoxy-terminated silane dendrimers. According to the insulation board, the surface of the expanded perlite is fully covered with the hydrophobic layer, water can be prevented from permeating into internal pores of the expanded perlite, so the thermal insulation performance of the insulation board in a humid environment is prevented from being reduced; and the expanded perlite and the cement form a large number of covalent bonds through alkoxy-terminated silane dendrimers, so the strength of the insulation board is high.

Description

technical field [0001] The invention relates to the field of building thermal insulation materials, in particular to an inorganic lightweight aggregate thermal insulation board and a preparation method thereof. Background technique [0002] External wall insulation board is the preferred material to meet the current energy-saving needs of housing construction and improve the external wall insulation level of industrial and civil buildings. It is also the first material for energy-saving renovation of existing buildings. The traditional insulation board is made of organic materials such as polyurethane. Although it has the advantages of low cost and simple construction method, it has the problem of poor flame retardant performance. The expanded perlite thermal insulation board has excellent fire performance. With the implementation of building energy-saving policies and the improvement of fire performance requirements of thermal insulation materials, as one of the alternative...

AI Technical Summary

Problems solved by technology

In this method, although the polymer film can be used to prevent moisture from entering the internal void of the expanded perlite and prevent the thermal insulation performance of the insulation board from greatly decreasing in a humid environment, when the bonding strength between the polymer film and the surface of the expanded perlite is weak, In the process of preparing the insulation board, it is easy to peel off and lose the waterproof effect, and the organic modification will also lead to the weakening of the bonding strength between the expanded perlite and the cement, which will affect the strength of the insulation board

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