Day 2 Tue, October 04, 2022,
Journal Year:
2023,
Volume and Issue:
unknown
Published: Oct. 17, 2023
Abstract
This
article
focuses
on
the
development
and
characterization
of
one-part
rock-based
geopolymer
slurries
utilizing
Brazilian
rock
precursors
for
well
construction
plugging
abandonment
applications
(P&A).
The
study
presents
fluid-state
solid-state
properties
these
geopolymers,
X-ray
diffraction
(XRD),
Scanning
Electron
Microscopy
(SEM)
to
understand
precursors'
microstructure
reaction
level.
effect
temperature
pressure
compressive
strength
was
investigated.
By
altering
parameters,
aimed
impact
different
environmental
conditions
material.
Technological
tests
were
performed
according
API
RP
10B-2.
Compressive
conducted
determine
early
thickening
time,
UCA
carried
out.
Post-curing,
Retvied
analysis
through
XRD
examine
reactivity.
Finally,
also
assessed,
including
time
viscosity.
geopolymers
is
observed
be
temperature-dependent,
as
shown
ultrasonic
data.
final
product
has
a
dense
structure,
its
long-term
performance
will
require
evaluation
sealing
capability
volume
change
barrier
research
demonstrates
potential
cementing
using
precursor.
Materials,
Journal Year:
2024,
Volume and Issue:
17(6), P. 1340 - 1340
Published: March 14, 2024
The
effective
use
of
waste
materials
is
one
the
key
drivers
in
ensuring
sustainability
within
construction
industry.
This
paper
investigates
viability
and
efficacy
sustainably
incorporating
a
polylactic
acid-type
plastic
(WP)
as
10
mm
natural
coarse
aggregate
(NA)
replacement
geopolymer
concrete.
Two
types
concrete
(ordinary
Portland
cement-OPC
geopolymer)
were
produced
for
completeness
using
formulation
ratio
1:2:3.
ordinary
binder
control
was
prepared
100%
OPC
at
water/binder
0.55,
while
used
an
optimum
alkaline
activator/precursor-A/P
(0.5)
sodium
silicate
to
hydroxide-SS/SH
volume
(1.2/0.8).
Using
same
quantity
control,
four
batches
developed
by
replacing
NA
with
WP
30
70
wt%
mechanical
performance
assessed
according
their
appropriate
standards,
microstructural
investigation
employed
after
28
days
curing
identify
any
morphological
changes
hydrated
phases.
results
illustrate
production
up
despite
some
negative
impacts
on
performance.
From
perspective,
indicated
46.7-58.3%
strength
development
superiority
over
or
without
WP.
sample
composition
texture
quantified
automated
scanning
electron
microscopy
that
adding
reduced
presence
pores
microstructure
both
types.
However,
this
detrimental
due
low
interfacial
zone
(ITZ)
between
calcium
hydrate
(CSH)
gel
WP,
resulting
formation
cracks.
Structural Concrete,
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 3, 2024
Abstract
Engineered
geopolymer
composites
(EGC)
featuring
extraordinary
tensile
ductility
are
a
potential
alternative
to
engineered
cementitious
composite.
In
this
study,
the
local
bonding
properties
of
steel
bars
in
EGC
were
investigated.
Monotonic
loading
tests
120
specimens
performed
using
pullout
test
method.
The
study
examined
ultimate
strain
EGC,
diameter
and
anchorage
length
bar
on
bond
performance.
results
showed
that
with
an
4.57%,
had
highest
peak
strength.
By
comparing
rebar
ordinary
concrete
performance
provided
several
previous
literature,
it
was
demonstrated
has
superior
compared
concrete.
Based
this,
suggestions
for
design
EGC.
Finally,
mathematical
model
suitable
determining
bond–slip
curve
between
is
proposed.
Journal of Metals Materials and Minerals,
Journal Year:
2024,
Volume and Issue:
34(2), P. 1966 - 1966
Published: June 4, 2024
Porous
geopolymers
(PG)
are
attractive
due
to
their
simple
fabrication
and
diverse
applications.
This
work
presents
a
method
for
fabricating
PG
by
using
aluminum
salt
slag
(ASS)
as
foaming
agent
metakaolin
(MK)
the
precursor.
Sodium
silicate
(Na2SiO3)
sodium
hydroxide
(NaOH)
used
alkali
activator
solutions.
The
results
show
that
is
fabricated
sequence
mixing
method.
ASS
was
milled
size
of
4
µm,
then
mixed
with
an
NaOH
solution
30
min.
After
that,
MK
Na2SiO3
were
added.
weight
ratio
Na2SiO3/NaOH
solid/liquid
2.0
0.6,
respectively.
7-day
cured
5
wt%
achieves
strength
15
MPa,
which
close
minimum
requirement
Portland
cement
19
MPa.
decreases,
while
setting
time
pore
increase
increasing
content.
knowledge
this
enables
utilization
valuable
geopolymer
agent.
