BUBBLE DECK SLAB

CONTENTS Introduction Materials Advantages Experimental Study Scope of Future Conclusion

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 ?

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

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.

WHY BUBBLE DECK SLAB ?

Flat slab technology (no need of beams )

Longer spans

Pre fabricated&

cast in-situ

No compromise for strength& serviceability

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..

ADVANTAGESStructural

Less weightIncreased strengthNo need of beams Only few columns requiredLarger spanFree choice of ShapeLess foundation depthLess excavation required 15

m

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

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

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

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

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

CONCLUSION

Obviously this intellectual slab design may become the future of slab construction which gives a tremendous contribution in

Sustainable development

THANK YOU

For your attention