Waterproof closed-cell expanded perlite

Abstract

The invention provides a waterproof closed-cell expanded perlite which is prepared by the following steps of: matching silica sol, water glass, a waterproof agent, cement powder, a curing agent and water in parts by weight, and uniformly mixing to prepare a waterproof closed-cell sizing agent; then uniformly spraying the waterproof closed-cell sizing agent to the surface of an expanded perlite, and then drying or airing the expanded perlite to obtain the waterproof closed-cell expanded perlite, wherein 215.1-262.9 kilograms of the waterproof closed-cell sizing agent is sprayed to the expanded perlite per cubic metre. The waterproof closed-cell expanded perlite has the outstanding advantages of light capacity, good heat insulation property, waterproofness, good affinity, high compression strength, extensive usage temperature, high chemical stability, innocuity, odourless, incorruption and non-inflammation, acid-alkali resistance, simple preparation process and low cost, thereby being an ideal building heat insulation material.

Description

technical field [0001] The invention relates to a building thermal insulation material, in particular to a waterproof closed-cell expanded perlite. Background technique [0002] Ordinary expanded perlite has excellent thermal insulation, filtration and adsorption properties, non-toxic, odorless, non-corrosion, non-combustible, acid-resistant, alkali-resistant, light bulk density, sound-absorbing, stable chemical properties, it is widely used in petroleum, chemical, electric power, metallurgy and Construction and other fields; the fly in the ointment is that the mass water absorption rate of ordinary expanded perlite is as high as 400%, and the volume water absorption rate is as high as 30%. [0003] In response to the above shortcomings, people have been working hard to improve it. Among them, the strength, waterproof rate and closed porosity of the expanded perlite treated by shelling can be greatly improved, but its thermal conductivity is thus increased, resulting in its ...

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Problems solved by technology

[0002] Ordinary expanded perlite has excellent thermal insulation, filtration and adsorption properties, non-toxic, odorless, non-corrosion, non-combustible, acid-resistant, alkali-resistant, light bulk density, sound-absorbing, stable chemical properties, it is widely used in petroleum, chemical, electric power, metallurgy and Construction and other fields; the fly in the ointment is that the mass water absorption rate of ordinary expanded perlite is as high as 400%, and the volume water absorption rate is as high as 30%.

[0003] In response to the above shortcomings, people have been working hard to improve it. Among them, the strength, waterproof rate and closed porosity of the expanded perlite treated by shelling can be greatly improved, but its thermal conductivity is thus increased, resulting in its The thermal insulation effect has dropped significantly. What's more, the country has now raised the energy-saving standard for wall insulation from 50% to 65%, which makes it difficult for shell-coated expanded perlite to meet the needs of the market; Expanded vitrified microbead perlite has high waterproof and closed-cell capabilities, and high strength, but the power consumption in the processing process is too high, the production cost is too high, and, in use, it is found that its heat preservation The effect is not ideal, especially, its glazed surface is not conducive to bonding, and the wall after construction is prone to hollowing, cracking and falling off