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laity
noun
laitance
noun
(construction)
A
weak,
milky
layer
of
cement
and
aggregate
fines
on
a
concrete
surface
that
is
usually
caused
by
an
overwet
mixture,
overworking
the
mixture,
improper
or
excessive
finishing
or
combination
thereof.
Also,
could
be
caused
when
a
slurry
mix
is
used
on
a
deep
foundation,
where
the
slurry
mix
is
not
completely
removed
before
placing
concrete
on
top.
laitakarite
noun
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