Research Square (Research Square),
Journal Year:
2023,
Volume and Issue:
unknown
Published: Nov. 20, 2023
Abstract
This
paper
introduces
a
high-performance
thixotropic
slurry
for
filling
subterranean
voids
such
as
mine
goaves,
formulated
from
construction
and
demolition
waste.
Indoor
tests
were
conducted
to
identify
optimal
agent
ratios
maximum
15-minute
mixing
time.
A
new
rheological
model
was
established
describe
the
slurry's
behavior
accurately
consider
hysteresis
loop
during
increase
decrease
in
shear
process.
Slurry’s
supporting
capacity
became
evident
after
60
h
of
curing.
The
strength
exceeded
2
MPa
at
28
days,
satisfying
requirements.
An
environment-economic
integrated
evaluation
study
indicates
that
this
offers
both
environmental
economic
benefits.
Journal of Materials Research and Technology,
Journal Year:
2023,
Volume and Issue:
27, P. 2627 - 2640
Published: Oct. 13, 2023
Fiber
reinforced
cementitious
tailings
backfill
(FRCTB)
is
progressively
employed
in
mining
industry
due
to
its
high
strength/stiffness-to-weight
ratio.
However,
the
wide
use
of
FRCTB
technique
requires
further
study
practice
many
different
types
fibers,
either
alone
or
combination.
In
this
regard,
paper
explores
impact
composite
(glass-polypropylene)
fibers
on
microstructure
FRCTBs
considering
weak
surface
and
pore
characteristics.
The
fractures
backfills
were
quantitatively
analyzed
by
a
non-destructive
X-ray
micro-computed
tomography
system
which
permits
imagining
interior
microstructures
via
construction
3D
volumetric
data
diverse
spatial
scales.
Quantitative
parameters
cover
percent
surface,
porosity,
sphericity.
distribution
surfaces,
pores,
fissures
bridging
effect
also
based
reconstruction
technique.
Adding
increased
percentage
FRCTB's
surface.
greater
glass
fiber
dose,
larger
Composite
can
lessen
porosity.
smallest
porosity
was
0.07%
for
PP
contents
0.4wt.%
0.2wt.%,
respectively.
A
rise
dose
causes
volume
10-100mm3
content.
Fibers
have
0.1-100mm3
deteriorates
shape
type
leading
reduction
sphericity
pores.
There
clear
correlation
between
patterns
along
height
specimens.
Weak
surfaces
pores
are
prone
develop
as
fractures.
limit
crack
expansion
FRCTB.
Lastly,
presents
time-
cost-saving
method
analyzing
microstructure.
Academic Journal of Science and Technology,
Journal Year:
2025,
Volume and Issue:
14(3), P. 220 - 227
Published: March 26, 2025
The
activity
of
gold
tailings
was
activated
by
alkali
activation
method.
Cement
and
were
used
as
cementitious
materials
to
prepare
3D
printing
concrete.
mechanical
properties
rheological
characteristics
the
slurry
measured
evaluate
its
performance
during
printing.
results
showed
that
when
content
approximately
1:1
with
amount
cement,
28-day
strength
reached
31.9MPa,
concrete
had
best
lateral
deflection
cylindrical
components
printed
more
than
50%
lower
traditional
concrete,
structural
integrity
higher,
open
time
within
a
reasonable
range.
