Alkali efflorescence inhibition perlite heat insulation plate and making method thereof

Abstract

The invention relates to an alkali efflorescence inhibition perlite heat insulation plate and a making method thereof. The alkali efflorescence inhibition perlite heat insulation plate is made from the following raw materials: expanded perlite, water glass, a water repellent, an inhibitor, water and an adhesive. The method comprises the following steps: weighing the water glass, the water repellent and water, uniformly mixing the water glass, the water repellent and water, adding the obtained mixture to the expanded perlite, stirring obtained materials until uniformity, pouring the obtained mixture into a die, carrying out compaction molding to make a substrate wet blank, and carrying out microwave drying until constant weight in order to obtain a substrate; and mixing the inhibitor with the adhesive in advance until uniformity to obtain a mixture, spraying water to the surface of the substrate, and uniformly smearing the surface of the pretreated substrate with the mixture. The alkali efflorescence inhibition perlite heat insulation plate made in the invention solves the problem of alkali efflorescence of the surface of perlite heat insulation plates adopting the water glass as an adhesive without increasing the cost, improves the weatherability of the perlite heat insulation plates, improves the beauty of buildings in cities, and avoids accidents caused by spalling of external heat insulation layers of exterior walls.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation materials, and in particular relates to a type of anti-alkali-returning perlite thermal insulation board and a manufacturing method thereof. Background technique [0002] Perlite insulation board is made of hydrophobic expanded perlite bulk material, which is made by screening expanded perlite, adding waterproofing agent and binder for preparation, pressure molding, drying and other processes. Thermal waterproof insulation board. The characteristics of perlite insulation board with water glass as adhesive: low cost, strong cohesive force and high strength, but after being exposed to wind, sun and rain, the salt ions in water glass will be separated from the insulation board after a period of time , A layer of white matter appears on the surface of the wall, which is the so-called back-alkali phenomenon. Not only does it affect the appearance of the city, but also, due to the precipita...

AI Technical Summary

Problems solved by technology

It not only affects the appearance of the city, but also, due to the precipitation of the adhesive, the bonding ability of the board is reduced, and the board will be damaged, resulting in peeling and accidents.