US 5,358,760 A · Process for producing solid bricks from fly ash, bottom ash, lime, gypsum, and calcium carbonate

Abstract

A method of using waste materials produced by coal combustion to produce useful products. In one embodiment the invention provides solid bricks produced by compressing together fly ash, bottom ash, gypsum, calcium carbonate, and lime. These bricks have sufficient structural strength for use in building and construction. In another embodiment, waste materials are encapsulated in a mixture of fly ash, bottom ash, gypsum, lime, and calcium carbonate and compressed into bricks that may be disposed of in an environmentally acceptable manner. Further, the compressed bricks containing waste material may be coated with an impermeable membrane of a synthetic polymeric material. Further, the invention provides a mobile, trailer-mounted apparatus for compressing the mixtures into bricks.

Claims4

Dependent claims

A compressed block with structural strength for use in building and construction, said block comprising:

a cured, compressed mixture of from about 40 to about 45 wt. % fly ash;
from about 40 to about 45 wt. % bottom ash;
from about 2.5 to about 5 wt. % gypsum;
from about 2.5 to about 5 wt. % calcium carbonate;
and from about 5 to about 10 wt. % lime;
wherein said block is prepared by compressing the mixture of fly ash, bottom ash, and waste under from about 1,500 to about 2,350 psi, without the application of externally supplied heat.

3 more elements

Dependencies are inferred from the claim text.

Process for producing solid bricks from fly ash, bottom ash, lime, gypsum, and calcium carbonate

Life of this patent

Process for producing solid bricks from fly ash, bottom ash, lime, gypsum, and calcium carbonate

Life of this patent

Abstract

Claims4