Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing
Reexamination Certificate
2000-08-16
2001-05-15
Marcheschi, Michael (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Inorganic settable ingredient containing
C106S668000, C106S708000, C106S697000, C106S738000, C106S816000, C106S817000, C106S819000, C106S823000
Reexamination Certificate
active
06231663
ABSTRACT:
SUMMARY OF INVENTION
In accordance with the invention, this process takes old concrete, sidewalk, paving, curb, etc. and reuses it to produce a new concrete mixture that is comparable to concrete made with virgin materials. Instead of the old materials being discarded, filling our already limited landfills, they are recycled into a useful and valuable product. Not only will the new concrete mixture create more by volume per weight by using less material in production, but will also be produced at a substantially cheaper cost, enabling this product to be offered on the market, to the consumer, at a reduced rate.
FIELD OF INVENTION
The process relates to an improved usable concrete material, which can be made with less virgin aggregates, by utilizing recycled concrete material and fly ash. Less material is needed to make the same volume of concrete mixture, which is cost effective to produce and just as workable and durable as a virgin concrete.
BACKGROUND OF THE INVENTION
Concrete is a building material made by mixing cement, fine and coarse aggregates in water. The gathering of old concrete, asphalt, brick, block, sand, gravel and other grit type materials normally out of specification in its present state. The old concrete, asphalt, brick, sand, gravel and other grit material being crushed and sized does not have to be any minimum compressive strength to be mixed with new concrete and fly ash. Once virgin concrete is mixed, poured and set, it is unable to be reused for any other purpose, it must then be discarded (most likely to a landfill dump) and replaced with new virgin concrete again. However, by utilizing the crushed recycle method, as described within, the old discarded set concrete can actually be reused in making new concrete mixture. This method will also cut down substantially on the amount of virgin materials needed, not to mention the expense and wastefulness of disposing old concrete in a landfill. By production standards, this method will prove to be not only less expensive to the consumer, but will also preserve our natural resources, a precious commodity. The coarse aggregate used in present invention consists of a mixture of recycled concrete having a size of ¼ to 200 mesh and recycled concrete having a size of 1″ to 4 mesh, recycled concrete having a size of ¾″ to 4 mesh and recycled concrete having a size of ½″ to 4 mesh. The composition according to the present indication can also be bagged.
REFERENCES:
patent: 5236500 (1993-08-01), Schneider et al.
patent: 5328508 (1994-07-01), Lin
patent: 5725655 (1998-03-01), Catterton et al.
Catterton Robert L.
Harris Tony H.
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