Microstructure evolution and mechanical behavior of foamed cement-based tail backfills under varying fiber types and concentrations
Abstract
Industrial
solid
waste
(mine
tailings)
management
has
emerged
as
the
key
universal
ecological
challenge
a
result
of
unceasing
creation
rising
by-products.
Employing
tailings
makes
mine
fill
production
economical
and
assists
resolve
disposal
problems.
Foamed
cement-based
backfill
(FCTB)
is
consisting
tailings,
cement,
water
foaming
agent.
It
provides
certain
advantages
such
lightweight,
good
fluidity,
thermal
insulation,
yet
relatively
weak
in
strength.
Additionally,
FCTB’s
strength
properties
can
be
intensely
improved
by
adding
fibers.
A
total
3
diverse
fibers:
polypropylene
(PP),
glass
(G),
basalt
(B)
well
dodecyltrimethylammonium
bromide
(DTAB)
agent
were
used
to
prepare
fiber-reinforced
foamed
cementitious
(FR-FCTB).
The
mechanical
properties,
energy
evolution,
ductility
microstructure
FR-FCTB
elaborately
investigated
uniaxial
compression
tests
(UCS)
SEM.
Laboratory
findings
demonstrates
that
reinforcing
effect
three
fibers
on
FCTB
specimens:
>
basalt.
showed
best
features
fiber
content
0.3%
was
adopted
FCTB.
At
this
time,
UCS
performance
reinforced
FCTBs
0.85
MPa
increased
18.1%.
addition
increase
fill’s
storage
limit,
slow
down
discharge
elastic
strain
within
backfill,
enhance
toughness.
factor
evaluates
degree
deterioration
filling
terms
post-peak
drop,
with
all
values
being
greater
than
CTB.
FR-FCTB’s
chief
hydration
product
C-S-H
gel.
Fiber’s
bridging
significantly
rallies
crack
extension
thus
features.
Lastly,
study’s
main
results
are
instructive
for
industrial
application
metallic
mines.
Research Square (Research Square), Год журнала: 2024, Номер unknown
Опубликована: Авг. 29, 2024
Язык: Английский
