Lightweight building material and method of producing the same
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United States of America Patent
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Jul 31, 1984
Grant Date -
N/A
app pub date -
Jul 28, 1982
filing date -
Aug 8, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lightweight building material comprises expanded perlite as an additive and a bonding agent structure consisting of an alkalisilicate and containing pores formed by foaming and/or expansion. The pore content which results from the pore structure of the bonding agent amounts to 85 to 99% by volume, with bulk densities of 40 to 200 kg/m.sup.3, and strengths of 0.01 to 0.5 N/mm.sup.2. In a method for producing a lightweight building material mortar mixes of the following composition are used: 70 to 85% by volume of perlite (bulk density from 20 to 150 g/l. grain-size from 0 to 6 mm) 23.0 to 2.5% by volume of water-glass (38 degrees Be) 25.0 to 5.0% by volume of water 1.0 to 0.10% by volume of hardener 2.0 to 0.05% by volume of air-entrainer.
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