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Mr. O. Arivazhagan "Ari", CEO, IIPM, was invited to the Seminar on "GGBS For Producing Sustainable
Concrete" and delivered the special invitee lecture on
"Optimization of GGBS Concrete Compressive Strength Using DOE "
organized by JSW Cement in association with
Indian Concrete Institute, Tamil Nadu on 15th May 2015
at Hotel Green Park, Chennai.
He highlighted
the importance of using
GGBS
as a replacement for cement, as GGBS is a waste material
obtained as a by-product of iron and steel making, having
cementing properties. In short a waste material that can be used
effectively in concrete.
He also
questioned on what exactly was preventing us from using GGBS
–GGBS gains strength very late for which form work/curing could
be done slowly. He said he was surprised that GGBS have been
there for
150 Years. He also said that cost for aerated
concrete block is very less, however every contractor wants to
use big solid block. There are a lot of misconceptions in the
industry – more cement would mean more strength. He said that
while Ordinary Portland Cement costs
Rs.400, GGBS costs Rs.150
which would mean one bag free for one bag purchased. He conveyed
that people with annual income of less than Rs.12 lakh
could be proposed with an idea of using GGBS during
construction.
He explained about the project which
was completed successfully on Optimization of Compressive Strength using DOE which was
done in collaboration with St.Peter’s University using Minitab. He highlighted on the importance of
Sustainability- Civil Engineers can minimize the use of concrete and maximize its
durability and strength.
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He also spoke about human beings tendency of not buying things
which cannot be sustained; sustainability on concrete requires
a link between social, economic and environmental factors and
that sustainability covers lifecycle cost- cost involved in
purchasing, making and throwing.
He also pointed out that
affordable houses – sustainability plays a major role in GGBS.
He said more importantly 1/10th of cement produced nearly
produces 0.8 tonne of carbondioxide – this
shows that utilization of normal cement can be reduced and
Portland cement/GGBS should be encouraged.
He spoke about Embedded water –
which would be the amount of water required to produce a product
from start to finish and it was commonly used in reference to
agricultural products but may be applied to non-agricultural
goods as well, such as construction products. He concluded that
using the same material,strength could be increased by 15% using GGBS.
In his speech to a
gathering of nearly 200 - 250 participants, he highlighted the
importance of using GGBS as a replacement for cement,
as GGBS is a waste material obtained as a by-product of iron and steel
making, having cementing properties. In short a waste material that can
be used effectively in concrete.
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