A
Bare Fact Consider these facts
:
Conventional red bricks’ production
is contributing towards global warming.”
Due
to over utilization of fertile layer i.e. top few feet of the agricultural land,
it makes most of the nearby land completely infertile.”
The
coal used for heating the bricks itself is a wastage of precious resources”.
Bricks & blocks made out of fly ash, a by product
of thermal power station is indeed a boon for construction.
72% of power generated in India is from thermal
power stations. Ash content of 40-50% in coal generates nearly 90 million tonnes
of flyash every year, reaching upto 120 million tonnes by the year 2010. Besides
air and water pollution, the disposal of this flyash results in extensive land
wastage. Today, there is an urgent need of well-planned programmes for the proper
management of flyash to protect our perilously imbalanced environment.
Research
& development indicates that bricks, portland pozzolana cement, sintered aggregates,
tiles, light weight aggregates and hollow bloks can be produced using this flyash
as raw material. The properties of the materials made from flyash have been found
to be better than conventional materials for use in construction work. Besides
these uses, flyash can be utilised for backfilling of mines, lining irrigation
canals, agriculture, aggregates in road construction etc.
Fly
ash-lime-gypsum is a technological renaissance of age-old pozzolanic chemistry
proven for its longevity for thousands of years. A process of blending flyash,
lime and calcined gypsum for making a useful product, has been developed.
In
no way , it is inferior to conventional red bricks in terms of crushing strength,
water absorption, mortar and plaster saving & thermal insulation. In fact
is shade better in every way.
Though Interiors of the
construction has special requirements, usage of such bricks, blocks could be utilized
for exteriors, walls etc.
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