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US 4,900,359 AGranted
Cellular concrete
AssigneeLisa Concrete Inc.
InventorLawrence F. Gelbman
Life of this patent
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AssigneeLisa Concrete Inc.
InventorLawrence F. Gelbman
Estimating the term…
A stable, non-shrinking cellular concrete in which cell integrity is maintained and cell coalescing is substantially eliminated is provided by the addition of a colloidal solution or sol-gel of sodium bentonite, peptized calcium bentonite, attapulgite or a gelled silica sol-gel, such as a sol-gel of sodium silicate-calcium chloride, to a cellular concrete mix. The improved cellular concrete is characterized by an increased strength to weight ratio and is therefore more suitable for use in structural applications as well as for insulation purposes. Moreover, the improved cellular concrete is buoyant since it absorbs substantially no water in its cells since the cells have not coalesced and are not interconnected. By virtue of the non-coalescence and non interconnection of the multitudes of tiny cells in this novel buoyant cellular concrete, which is capable of floating on a body of water, a cross-sectional cut through a mass of this lightweight concrete reveals a generally uniform structure of tiny individual and mostly symmetrical separate cells, distinctly different in appearance from the random larger, smaller, often interconnected and lopsided cells found in a cross-section of conventional cellular concrete. The improved cellular concrete is especially suitable for use in producing lightweight aggregate.
A cellular concrete mix for the preparation of cellular concrete comprises
A cellular concrete produced by the process comprising substantially uniformly mixing together:
A cellular concrete mix for the preparation of cellular concrete, comprising:
Lightweight aggregate comprising the cellular concrete of claim 37 which has been crushed.
Dependencies are inferred from the claim text.