AMB Express,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: April 28, 2025
The
technique
of
microbially
induced
calcium
carbonate
precipitation
(MICP)
has
a
bright
prospect
in
the
repair
concrete
structures
with
diseases,
so
evaluation
effect
and
its
influencing
factors
are
very
important
issues
for
civil
engineers.
In
this
paper,
multi-phase
mixed
precipitate
models
established
by
using
random
particle
generation
packing
algorithm.
Combined
cohesive
zone
model,
deformation
failure
behavior
notched
cement-mortar
microbeams
before
after
under
three-point
bending
loading
numerically
simulated.
recovery
rate
is
proposed
to
characterize
microbeam.
influences
proportion
crystalline
phases
precipitate,
size
notch
location
on
it
evaluated.
It
found
that
peak
load
microbeam
decreases
from
22.16
20.60%
as
calcite
increases
0
1
combination
case
vaterite
particles
precipitate.
However,
aragonite,
1,
35.01
20.77%.
For
only
grains
12.73
36.85%
when
2
3.4
μm.
When
distance
between
center
midspan
40
μm,
20.44
77.26%.
effects
phases,
repairing
can
be
explained
population
matrix-particle
interface
stress
concentration
degree
Considering
compositions
regulated
control
environmental
process
parameters,
research
paper
great
significance
engineering
application
MICP
technique.
Buildings,
Journal Year:
2025,
Volume and Issue:
15(7), P. 1052 - 1052
Published: March 25, 2025
Microbial-induced
carbonate
precipitation
(MICP)
is
gaining
attention
as
an
eco-friendly
and
sustainable
method
for
concrete
crack
repair.
However,
key
challenges
related
to
its
large-scale
implementation,
regulatory
approval,
integration
into
existing
construction
standards
remain
underexplored.
This
review
examines
recent
advances
in
MICP,
emphasizing
role
circular
economy
practices
building
solutions.
Traditional
synthetic
sealants
contribute
environmental
pollution
have
limited
long-term
durability,
highlighting
the
need
greener
alternatives.
Global
research
trends
reveal
increasing
focus
on
self-healing
materials,
biomineralization,
durability
enhancement,
alongside
emerging
innovations
such
encapsulation
technologies,
marine
applications,
bio-based
composites.
Unlike
previous
reviews,
this
study
integrates
bibliometric
analysis
systematically
assess
trends,
identify
collaboration
networks,
evaluate
that
impact
MICP
adoption.
While
offers
significant
advantages,
including
capabilities
compatibility
with
industrial
by-products,
barriers
cost,
scalability,
policy
persist.
identifies
critical
thematic
clusters
which
include
microbial
action,
sustainability,
engineering
applications.
helps
provide
actionable
insights
researchers,
engineers,
policymakers.
By
fostering
interdisciplinary
collaboration,
has
potential
become
a
transformative
solution
resilient
environmentally
infrastructure.
Research Square (Research Square),
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 26, 2025
Abstract
This
research
investigates
the
self-healing
potential
of
Bacillus
subtilis
in
concrete
due
to
its
high
capacity
for
calcium
carbonate
precipitation.
Mathematical
modelling
and
machine
learning
methods,
i.e.,
Random
Forest
Method
(RFM)
Kuhn-Tucker
(KT)
Condition,
were
used
maximize
healing
efficiency.
Bacteria-free
bacteria-containing
samples
subjected
control
cracking,
results
indicated
complete
cracks
21
days
under
optimal
curing
conditions.
Comparative
study
river
sand
(RS)
manufactured
(MS)
bacterial
improved
mechanical
strength
MS-based
with
9.27%
improvement
compressive
12.78%
6.36%
split
tensile
flexural
strengths,
respectively.
Load
removal
subsequent
re-loading
tests
effective
up
1
mm,
especially
14
day
cured
samples.
Besides,
reinforced
beams
(M20,
M25
M30)
stress
load
re-loading.
28-day
exhibited
closure
within
days,
indicating
dependability
mechanisms.
identifies
subtilis-based
as
a
cost-effective,
sustainable,
durable
material
infrastructure
durability.
Future
studies
should
aim
at
field
application,
large-scale
production,
optimization
survival
rates
global
application.
Abstract
Wellbore
integrity
is
paramount
in
the
oil
and
gas
sector,
directly
influencing
operational
safety,
environmental
protection,
economic
viability.
The
cementing
process,
designed
to
secure
wellbore
systems
prevent
fluid
migration,
often
faces
significant
challenges
due
extreme
subsurface
conditions,
including
high
temperatures,
pressure
variations,
chemical
aggressiveness.
In
recent
years,
innovative
self-healing
cement
composites
have
emerged
as
a
promising
solution
enhance
integrity,
integrating
advanced
materials
capable
of
autonomously
repairing
cracks
defects.
This
paper
explores
advancements
composites,
focusing
on
improve
durability
well
integrity.
covers
polymer-cement
which
use
polymers
repair
cracks,
microbial
slurries
from
dairy
wastewater
that
heal
via
activity.
It
also
examines
geopolymer
for
their
sustainable
properties,
bacterial
calcium
carbonate
precipitation,
engineered
cementitious
(ECCs)
exceptional
crack-healing
abilities
ductility,
offering
solutions
enhancing
performance.
Polymer-cement
demonstrate
improved
mechanical
properties
thermal
stability
by
incorporating
polymeric
materials,
making
them
particularly
suitable
geothermal
applications.
Geopolymer
resistance
attack
low
cost,
energy
requirements,
emissions.
Bacterial
utilize
activity
induce
effectively
sealing
micro-cracks
prolonging
life.
Additionally,
potential
reuse
nutrient
source
bacteria
addresses
concerns
while
reducing
cultivation
costs,
presenting
dual
benefit
management.
Meanwhile,
ECCs
leverage
fiber
reinforcement
provide
ductility
controlled
crack
formation,
improving
under
stress.
Despite
advantages
these
remain,
performance
considerations,
regulatory
compliance
regarding
agents
wastewater.
first
presents
novel
insights
into
all
exploring
like
(ECCs).
By
cutting-edge
technologies,
offers
practical
durability,
providing
practicing
engineers
with
new
strategies
sustainability.
AMB Express,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: April 28, 2025
The
technique
of
microbially
induced
calcium
carbonate
precipitation
(MICP)
has
a
bright
prospect
in
the
repair
concrete
structures
with
diseases,
so
evaluation
effect
and
its
influencing
factors
are
very
important
issues
for
civil
engineers.
In
this
paper,
multi-phase
mixed
precipitate
models
established
by
using
random
particle
generation
packing
algorithm.
Combined
cohesive
zone
model,
deformation
failure
behavior
notched
cement-mortar
microbeams
before
after
under
three-point
bending
loading
numerically
simulated.
recovery
rate
is
proposed
to
characterize
microbeam.
influences
proportion
crystalline
phases
precipitate,
size
notch
location
on
it
evaluated.
It
found
that
peak
load
microbeam
decreases
from
22.16
20.60%
as
calcite
increases
0
1
combination
case
vaterite
particles
precipitate.
However,
aragonite,
1,
35.01
20.77%.
For
only
grains
12.73
36.85%
when
2
3.4
μm.
When
distance
between
center
midspan
40
μm,
20.44
77.26%.
effects
phases,
repairing
can
be
explained
population
matrix-particle
interface
stress
concentration
degree
Considering
compositions
regulated
control
environmental
process
parameters,
research
paper
great
significance
engineering
application
MICP
technique.
