Properties of Concrete Incorporating Calcinet Earthworm Cast as Partial Replacement for Cement
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Abstract
Description
The high cost
of
cement
is
a
major
drawback
in
concrete
usage.
This
research
aimed
at
determining
the
strength
charac
t
eristics
of
concrete
incorporating
calcined
earthworm
cast
as
partial
replac
e
ment
of
cement
.
The
objectives
were
to
obtain
the
optimum
percentage
of
calcined
earthworm
cast
that
can
be
used
to
replace
cement
in
a
given
concrete
mix
,
and
to
ex
amine
the
physical
I
chemical
properties
of
the
calcined
earthworm
cast.
Percentage
replacement
of
cement
with
the
earthworm
cast
was
done
at
0,
10
,
20,
30%
respectively
and
tests
were
carried
out
on
fresh
and
hardened
concrete.
The
results
showed
that
while
the
initial
and
final
setting
time
of
the
concrete
containing
earthworm
cast
increased
with
the
increase
in
earthworm
cast
content,
the
compressive
strength
decreased
with
increase
in
ca
lcin
ed
ea
rthworm
cast
replacement
.
It
was
concluded
that
a
partial
replacement
of
not
more
than
30%
of
cement
with
calcined
earthworm
cas
t
will
suffice
.
Keywords
TH Building construction