In a simply supported RCC slab, the upper part of the slab is subjected to compressive forces while the lower portion is subjected to tensile forces. Concrete is very good in compression while it is weak in tension. Hence the steel reinforcement is placed in the tension zone. The concrete in this portion is only for holding together the steel reinforcement and has no structural purpose. This 'un-productive' concrete can be replaced by a 'Filler' material which will reduce the weight of the slab and also reduce the cost by reducing the amount of concrete used. Also, since the weight of the slab is thus reduced, lesser steel is also required for reinforcement, further reducing the cost.
There is no reductoin in the structural strength of the slab at all and it will act as a normal load bearing slab.
Common filler materials are light weight materials like Mangalore tiles, clay pans, bricks, waste bottles, coconut shells, thermocol etc.
Reduces the cost of the slab by around 25-30%
Creates interesting designs and patterns on the ceiling
Helps in better thermal insulation of the slab due to the air pockets present.
Reduces the load on the foundation
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Will the filler slab have the same load bearing capacity as supposed to conventional technology?
ReplyDeleteWill the filler slab have the same load bearing capacity as supposed to conventional technology?
ReplyDeleteHi Sireesha, the filler slabs will have similar load bearing capacity as only the concrete which is in the tension part of the slab is replaced by the filler material. This concrete doesnt add to the strength of the slab as all the tension is taken up by the reinforcement rods. So there is no loss of strength.
DeleteSujith , Can you suggest some good filler material as the Bricks and earthern pots are now a days equally costly and does not gice a saving, Plastic bottles might not give the bonding and there will be a chance of leakage .
ReplyDeletePl mail me ...milindsbabar@gmail.com
Thanks in advance
Can filler slab be used for high rise buildings?
ReplyDelete