| Once the concrete has been poured and finished, just like
in other applications, a retarder is applied to the surface.
The rest of the
concrete hardens and sets, but the surface curing takes much
longer. After a
couple hours, the surface is gently sprayed off exposing the
rocks. Once
cured, the surface can be sealed.
Rocks used in this process can be small (pea sized) or large
(6") and from
various families of aggregate. Exposed river rock with the
round smooth
stones about the size of a nickel is probably the most common
type of exposed
aggregate you will come across, but certainly not the only
option.
Exposed Aggregate can be used anywhere gray concrete is used.
Patios, driveways, steps, walks, even basement floors or even
as a decorative border.
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