US 4,748,788 AGranted

Surface seeded exposed aggregate concrete and method of producing same

OwnerRonald D. Shaw, Lee A. Shaw +1inventors

InventorsRonald D. Shaw, Lee A. Shaw, LeRoy E. Shaw

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Abstract

An improved surface seeded exposed aggregate concrete and method of use is disclosed characterized by use of small, rounded aggregate, preferably sand, being broadcast over the upper surface of the concrete. The broadcast aggregate is mixed into the cement paste derived from the concrete matrix by magnesium hand floats and finished by hand sponging. A surface retarder and vapor barrier is than applied to cover the concrete surface for approximately four to twenty four hours. Subsequently, any surface film is washed from the surface of the concrete and the concrete is cured by fogging or soaker hose. Approximately thirty days later, the surface residue is removed from the concrete with a stem/acid wash providing an exposed aggregate concrete having extreme flatness and high wear resistance suitable for high traffic areas and improved asthetics resembling stone, granite or marble.

Claims19

Dependent claims

A method of producing surface seeded exposed aggregate concrete having a generally flat exposed aggregate surface suitable for flooring applications comprising the steps of:

preparing the subgrade to a desired grade;
pouring a concrete mixture over said subgrade;
screeding said concrete mixture to a desired grade;
finishing the upper surface of said concrete mixture with a magnesium bull float to seal said upper surface and dispose a quantity of cement/fines paste derived from said concrete mixture at said upper surface of said concrete mixture;
broadcasting a quantity of aggregate having a mean diameter size of less than three-eights of one inch upon said upper surface of said concrete mixture;
mixing said quantity of aggregate into said quantity of cement/fines paste with a magnesium hand float;
applying a surface retarder uniformly over said upper surface of said concrete mixture;
washing surface films from said upper surface of said concrete mixture;
curing said concrete mixture;
and
washing said upper surface of said concrete mixture to remove surface residue therefrom.

8 more elements

Dependencies are inferred from the claim text.