during cement production making it environmentally
environmentally
harmful now let's explore what happens
when biochar is added to concrete when
biochar is mixed into concrete it
changes the hydration process in several
ways one water absorption and internal
curing because of its poorest structure
bio biochar absorbs extra water from the
concrete mix but instead of just holding
it biochar slowly releases water back
over time this keeps the hydration
process going for a longer period
reducing cracks and improving long-term
strength think of it like a tiny
Reservoir inside the concrete helping
the material cure better from the
inside two strength and durability
enhancement the large surface area of
biochar provides extra nucleation sites
for CSH formation this means more
binding material is created making the
concrete stronger the pores in biochar
can trap harmful ions like chloride and
sulfate reducing corrosion in reinforced
concrete three carbon sequestration and CO2
CO2
absorption biochar traps carbon
permanently preventing it from returning
to the atmosphere as CO2 some studies
show that biocar concrete can absorb CO2
from the air during curing making it
even more environmentally
friendly four workability and setting
time because biochar absorbs water
adding too much can make fresh concrete
stiff and less workable to fix this the
water content in the mix may need to be
adjusted in small amounts biochar
doesn't delay setting time significantly
but at higher doses it can slow down the process
process
let's compare traditional concrete with
biochar concrete traditional concrete
and biochar concrete differ in several
key aspects traditional concrete has a
dense structure with capillary pores
while biochar concrete is more porous
but retains water aiding curing Strength
In traditional concrete relies on CSH
formation whereas biochar enhances
strength through its nucleation effect
durability improves in biochar concrete
due to internal curing reducing
shrinkage cracks in terms of CO2
emissions traditional concrete is high
due to cement use but biochar concrete
lowers emissions by capturing carbon
lastly while traditional concrete has
minimal water absorption biochar
concrete absorbs more water which helps in
in
curing so what's really happening when
biochar is added to concrete at the micr
structural level it absorbs water stores
carbon and provides extra B sites for
cement hydration at the performance
level it improves strength durability
and resistance to cracking at the
environmental level it reduces CO2
emissions and makes concrete more
sustainable the key is getting the right
balance too little biochar won't have
much effect too much can reduce
workability and require mixed
adjustments but when used correctly
biochar has huge potential to make the
construction industry Greener and more
durable for more deep dives into
Sustainable Building techniques follow
along we've got plenty more coming your way
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