Environmental Research Climate,
Год журнала:
2023,
Номер
2(1), С. 015005 - 015005
Опубликована: Фев. 16, 2023
Abstract
Low-lying
atoll
nations
(e.g.
the
Maldives,
Kiribati,
Tuvalu,
Marshall
Islands)
are
highly
vulnerable
to
climate
change,
especially
sea-level
rise
(SLR).
Stringent
change
mitigation
will
slow
but
not
stop
SLR,
which
continue
for
centuries,
mandating
additional
long-term
adaptation.
At
same
time,
urbanisation
is
concentrating
population
in
a
few
centres,
around
capital
islands
creates
pressure
as
most
‘land-poor’.
This
paper
demonstrates
how
structural
adaptation
using
land
claim
and
island
raising
can
be
utilised
within
an
pathway
approach
sustain
enough
area
above
rising
sea
levels
satisfy
societal
economic
needs
over
multiple
centuries.
illustrated
its
environs
(Greater
Malé).
Raising,
expanding
connecting
‘urban’
provide
benefits.
Significant
developments
have
already
occurred
Greater
Malé
further
there
other
urban
centres
Maldives
expected.
Migration
Malé,
widespread
this
assumes
trend
continues,
implying
many
depopulated
or
abandoned.
Tourism
core
economy
tourist
require
different
ambience
islands.
They
could
sustained
with
sympathetic
soft
engineering
reinforcing
natural
processes
that
produce
atolls.
While
advance
provides
technical
solution
any
application
must
also
address
policy,
human,
physical,
economic/financial
challenges
raised.
Nonetheless,
by
aligning
through
advance/raising
existing
development
trends,
potential
persist
prosper
centuries
even
inevitably
rise.
realistic
alternative
assumptions
about
forced
migration
ultimate
national
abandonment.
The
lessons
here
may
find
wider
small
settings
mainland
coasts.
Buildings,
Год журнала:
2025,
Номер
15(2), С. 201 - 201
Опубликована: Янв. 11, 2025
Utilizing
recycled
aggregates
(RAs)
in
concrete
production
represents
a
promising
path
toward
sustainability;
however,
it
often
results
reduced
physical
and
durability
properties.
The
weak
interfacial
transition
zone
(ITZ)
the
adhered
mortar
aggregate
(RAC)
contribute
to
lower
mechanical
strength
limit
its
application
demanding
environments.
This
study
investigates
an
accelerated
carbonation
technique
enhance
properties
of
RA
RAC.
Recycled
aggregates,
with
particle
size
10–20
mm,
were
subjected
at
1
bar
for
2
h
controlled
chamber.
Results
demonstrate
substantial
improvements
compressive
split
tensile
strengths
carbonated
(CRAC),
increases
30%
42%
compared
conventional
RAC,
respectively.
CRAC
mix
also
exhibited
1.5%
increase
dry
density
water
absorption
(6%)
RAC
(7.58%).
After
90
days
acid
exposure,
reductions
48.85%
37.9%
observed
mixes,
respectively,
from
their
28-day
strength,
while
weight
loss
was
limited
5.4%,
10.92%
In
sulfate
exposure
tests
over
150
days,
showed
31.4%
19.7%
losses
3.6%
2.2%,
indicating
enhanced
resistance
harsh
However,
blended
supplementary
cementitious
materials
(SCMs)
diminished
properties,
likely
due
alkaline
environment
caused
by
rapid
calcium
hydroxide
pores
during
carbonation.
Overall,
findings
highlight
practical
potential
improve
performance
offering
viable
pathway
sustainable
construction
applications.
Resources Policy,
Год журнала:
2022,
Номер
77, С. 102671 - 102671
Опубликована: Март 24, 2022
Sand,
gravel,
and
crushed
rock
–
known
as
construction
aggregates
are
in
high
demand
the
Asian
region.
Such
is
driven
by
rates
of
urbanization,
infrastructure
development,
dam
building:
an
unprecedented
amount
sand
being
extracted
from
region's
river,
delta
estuary
areas,
only
to
be
transported
for
infill
or
purposes
elsewhere.
This
systematic
scoping
review
examines
state
knowledge
peer
literature
on
ecologies,
livelihoods,
governance
Asia.
We
find
that
mainly
focuses
ecological
implications
mining,
namely
biotic
abiotic
components:
mining
linked
with
many
forms
degradation,
although
partial
ecosystemic
recovery
may
possible
when
stops.
In
contrast,
limited
analysis
livelihoods
suggests
violence,
work-related
injuries,
precarious
jobs
common
those
working
industry,
producing
different
types
work
depending
level
mechanization.
conclude
noting
several
gaps
literature,
including
narrow
geographical
focus
(mainly
India
China),
lack
attention
intersection
between
other
anthropogenic
disturbances,
need
establish
transparent
processes
within
this
