LIMESTONE:
Limestone is
a
sedimentary
rock, formed
from shells
and other
“limy”
material in
the oceans
that in past
ages covered
the
“limestone
regions” of
now dry
land. Shells
and coral
owe their
stiffness to
calcium
carbonate
(CaCO3),
often called
“carbonate
of lime”.
Limestone
too is
mainly
calcium
carbonate
and a
microscope
reveals the
remains of
the sea
animals that
formed it.
An important
building
material, it
wears better
than
sandstone,
is more
easily
shaped than
granite, and
weathers
from nearly
white to a
beautiful
gray. Marble
is a
crystallized
form of
limestone
transformed
by pressure
and heat.
Used as a
durable
facing
material on
large
buildings
and as trim
and accent
detail
elsewhere,
limestone is
quarried,
cured and
cut to the
desired
dimensions
and shaped.
Common
applications
include
archways,
encasements,
keystones,
lintels,
pier caps,
coping,
quoins,
sills,
banding,
balusters,
columns, and
corner
stones.
PRECAST:
Architectural
precast
concrete
building
stone is a
man made
alternative
to
limestone.
It is a
portland
cement based
product that
is produced
in specially
shaped molds
to the
desired
design
specifications.
Color,
shape,
texture and
to some
extent
weight can
be
controlled
during the
manufacturing
process.
The
applications
of precast
trim
includes all
those listed
above for
limestone.
View the
.pdf files
listed
below:
Click here
to view
Typical Quion
Applications
Click
here to view
Typical
Keystone
Designs
Click
here to view
Typical
Lintels &
Pier Cap
.
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