bubble deck slab
TRANSCRIPT
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BUBBLE DECK SLAB
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CONTENTS Introduction Materials Advantages Experimental Study Scope of Future Conclusion
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BACKGROUND
Compression zone
Tensile zone
Inactive concrete
Central portion of RCC solid slab(simply supported)
Problems with inactive concrete: additional weight,
span limitations, material wastage, energy consumption
Solution ?
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Pre fabricated one way spanning concrete elements with hollow cylinders, replacing inactive concrete
HOLLOW CORE SLABS
Solution ?
Problems: Strength in one direction only
Inflexibility Reduced architectural possibilitiesLack of structural integrity
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BUBBLE DECK SLAB
The best solution for above two problems is Bubble Deck Slab
Bubble Deck Slab is a Biaxial voided concrete slab in which high density polythene hollow spheres replace the ineffective concrete in the centre of concrete slab.
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WHY BUBBLE DECK SLAB ?
Flat slab technology (no need of beams )
Longer spans
Pre fabricated&
cast in-situ
No compromise for strength& serviceability
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MATERIALS
PLASTIC SPHERES hollow spheres madefrom recycled high density polyethylene
• Enough strength & rigidity• Not porous• Doesn’t react chemically with concrete or steel
CONCRETE-the concrete is made of standard Portland cement with max aggregate size of¾ inch.
STEEL –The steel reinforcement is of MS or HYSD can be used..
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ADVANTAGESStructural
Less weightIncreased strengthNo need of beams Only few columns requiredLarger spanFree choice of ShapeLess foundation depthLess excavation required 15
m
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ADVANTAGES
ConstructionLight in weight less equipment is requiredEasy incorporation of ducts and pipes into slabLess work on construction site
EngineeringThe biaxial flat slab system and columns are ideal for structures with high resistance against ExplosionsThese slabs and column system acts as an elastic membrane which transfer horizontal forces to stiff vertical structures which is used for Earthquake resistant designs
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ADVANTAGESEnvironment
Less material and energy consumptionReducing CO2 emission up to 40 kg/m2 1kg of plastic replaces 100kg of concreteEvery component can be recycled
EconomySavings in materials Transportation costs reducedFaster construction timeBuildings can be more flexible and easy in installations
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EXPERIMENTAL STUDIES
1.Shear strength- 80% of solid deck slab2.Deflections - same as solid deck3.Weight - 40% less than a solid
slab4.Fire resistance - 65% of solid slab
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MILLENNIUM TOWER (ROTTERDAM)
First high rise building erected with Bubble Deck
Height of the building is 131 m
Second Highest building in Netherlands 34 stories were constructed
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SCOPE OF FUTURE USE Used for constructing all types of building
especially sky scrapers Best for larger span halls like theatres and
auditoriums Pedestrian bridge decks Used in parking areas as less number of
columns are required
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CONCLUSION
Obviously this intellectual slab design may become the future of slab construction which gives a tremendous contribution in
Sustainable development
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THANK YOU
For your attention