Materials,
Journal Year:
2021,
Volume and Issue:
14(22), P. 7065 - 7065
Published: Nov. 21, 2021
In
this
study,
the
impact
of
steel
fibres
and
Silica
Fume
(SF)
on
mechanical
properties
recycled
aggregate
concretes
made
two
different
types
Recycled
Coarse
Aggregates
(RCA)
sourced
from
both
low-
high-strength
were
evaluated
through
conducting
60
compressive
strength
tests.
The
RCAs
used
as
replacement
levels
50%
100%
Natural
(NCA).
Hook-end
SF
also
in
mixtures
at
optimised
1%
8%,
respectively.
results
showed
that
addition
RCA
adversely
affected
concrete.
However,
incorporation
led
to
development
concretes.
most
significant
improvement
terms
comparable
concrete
peak
strain
with
ordinary
28
days
was
observed
case
using
a
combination
concretes,
especially
high
Although
slightly
increased
elastic
modulus
substantial
due
reinforcement
fibre
coexistence
SF.
Moreover,
existing
models
predict
non-fibrous
fibrous
are
found
underestimate
values.
changed
stress-strain
curves
for
RCA.
remarkably
improved
post-peak
ductility
aggregates
types,
low-strength
parent
model
estimate
curve
fibre-reinforced
natural
reasonably
behaviour
fibres-reinforced
aggregate.
Materials,
Journal Year:
2022,
Volume and Issue:
15(1), P. 375 - 375
Published: Jan. 5, 2022
Geopolymers,
or
also
known
as
alkali-activated
binders,
have
recently
emerged
a
viable
alternative
to
conventional
binders
(cement)
for
soil
stabilization.
Geopolymers
employ
alkaline
activation
of
industrial
waste
create
cementitious
products
inside
treated
soils,
increasing
the
clayey
soils'
mechanical
and
physical
qualities.
This
paper
aims
review
utilization
fly
ash
ground
granulated
blast
furnace
slag
(GGBFS)-based
geopolymers
stabilization
by
enhancing
strength.
Previous
research
only
used
one
type
precursor:
GGBFS,
but
strength
value
obtained
did
not
meet
ASTM
D
4609
(<0.8
Mpa)
standard
required
soil-stabilizing
criteria
road
construction
applications.
current
focused
on
combination
two
types
precursors,
which
are
GGBFS.
The
findings
an
unconfined
compressive
(UCS)
test
stabilized
samples
were
discussed.
Finally,
concludes
that
GGBFS
fly-ash-based
geo-polymers
techniques
can
be
successfully
binder
However,
additional
is
requirement
in
applications,
particularly
subgrade
layers.
Polymers,
Journal Year:
2023,
Volume and Issue:
15(6), P. 1549 - 1549
Published: March 21, 2023
Biopolymers
have
recently
shown
great
potential
to
replace
traditional
binding
materials
in
geotechnical
engineering;
however,
more
research
is
required
reach
a
deeper
understanding
of
biopolymer-treated
soil
behavior.
The
objective
this
study
was
investigate
the
most
important
parameters
that
affect
behavior
soil,
including
biopolymer
content,
dehydration
time,
type
effect,
and
durability.
Sodium
alginate
agar
biopolymers
were
used
due
their
stability
under
severe
conditions
reasonable
costs
these
parameters.
A
broad
range
particle
sizes
optimize
kaolinite-sand
combination.
As
one
main
concerns
biotreated
soils,
durability
investigated
five
cycles
wetting
drying.
In
addition,
comprehensive
microstructural
performed
by
FTIR
analysis
SEM
images,
as
well
chemical
interaction
analysis.
results
indicated
optimized
content
0.5-1%
(to
weight)
time
14
days.
combination
25%
kaolinite
75%
sand
provided
highest
compressive
strength.
Under
drying
conditions,
significantly
increased
resistance
against
strength
reduction
mass
loss.
This
provides
an
how
sodium
changes
can
be
reference
for
further
studies
future.
