When planning
a concrete creation, the first thing to look at is the concrete
surface. Is it structurally sound? Will a topping (overlay)
be installed? Since the survival of an overlay is the bond,
concrete must be clean and the overlay property applied if
these types of creations are expected to last. Adamson points
out that the hardness of an overlay and concrete are not the
same, therefore the harder the surface, the cleaner the cut.
A broom finish on an existing
surface makes a more authentic looking brick pattern. To achieve
a polished marble look, smoothness is better. The surface
can be changed before your creation by grinding, sandblasting,
polishing, shot blasting or with an overlay.
