A concrete slab is a common structural element of modern buildings. Horizontal slabs of steel reinforced concrete, typically between 4 and 20 inches (100 and 500 millimeters) thick, are most often used to construct floors and ceilings, while thinner slabs are also used for exterior paving. Sometimes these thinner slabs, ranging from 2 inches (51 mm) to 6 inches (150 mm) thick, are called mud slabs, particularly when used under the main floor slabs[1] or in crawl spaces.[2] In many domestic and industrial buildings a thick concrete slab, supported on foundations or directly on the subsoil, is used to construct the ground floor of a building. These can either be "ground-bearing" or "suspended" slabs. The slab is "ground-bearing" if it rests directly on the foundation, otherwise the slab is "suspended".[3] For double-storey or multi-storey buildings, the use of a few common types of concrete suspended slabs are used (for more types refer to the Concrete Slab#Design section below): Beam and block also referred to as Rib and Block, are mostly used in residential and industrial applications. This slab type is made up of pre-stressed beams and hollow blocks and are temporarily propped until set, typically after 21 days. A Hollow core slab which are precast and installed on site with a crane. In high rise buildings and skyscrapers, thinner, pre-cast concrete slabs are slung between the steel frames to form the floors and ceilings on each level. Cast in-situ slabs are used in high rise buildings and huge shopping complexes as well as houses. These in-situ slabs are cast on site using shutters and reinforced steel.

1. Bubble deck slab
K.Renuka
14L41A0113
Technical seminar
on

2. Bubble deck slab

3. Contents:
• Introduction
 Type of bubble decks
 Materials
 construction
 Experimental studies
 advantages
 Case study
 Conclusion

4. Introduction:
 Eliminating all concrete.
 Reducing structural dead weight.
 Increasing the efficiency.
 Reduces the loads up to 30 to 50%.
 Less energy consumption.
 Used for storey, roof and ground floor slabs.
 It reduce earthquake damage.

5. Type of bubble decks:
 Type A- Filigree Elements
 Type B- Reinforcement Modules
 Type C- Finished Planks

6. Type A- Filigree Elements:
•Type-A is a combination of constructed and unconstructed
elements.
•Act as formwork and part of the finished depth .
•Supported by temporary stands.
•Additional steel may be inserted.
•techniques and finished as necessary

7. Type B:-Reinforcement Modules:
• pre-assembled sandwich of steel mesh and plastic bubbles.
•These components are brought to the site.

8. Type C:- Finished Planks:
•Is a shop-fabricated module.
•It is in the form of a plank and is delivered on site.
•Requires the use of support beams or load bearing walls.
• Best for shorter spans and limited construction schedules.

9. MATERIALS:
CONCREAT -the concrete is made of standard
Portland cement with max aggregate size of ¾ inch
STEEL-The steel
reinforcement is of MS
or HYSD can be used.
PLASTIC SPHERES
•hollow spheres made from
recycled high density
polyethylene.
Enough strength & rigidity.
Not porous.
Doesnt react chemically
with concrete or steel.

10. construction:
 The minimum distance between gaps is 1/9 of the gap diameter.
 Bubble Deck slab elements are plates with ribs on two
directions made of reinforced concrete .
 Connected with vertical ribs that go around the gaps.
 First construct bottom concrete part and then upper concrete
part.

11. EXPERIMENTAL STUDIES:
 1.Shear strength-80% of solid deck slab.
 2.Deflections -same as solid deck.
 3.Weight-40% less than a solid slab.
 4.Fire resistance -65% of solid slab.

12. ADVANTAGES:
Construction
 Easy incorporation of ducts and pipes into slab.
 Less work on construction site.
 Light in weight less equipment is required
 Earthquake resistant designs
Environment
•Less material and energy consumption
•Reducing CO2.
•Economy.
•Sustaining the natural resources.
•Faster construction time.

13. •MILLENNIUM TOWER
(ROTTERDAM)
•First high rise building erected with
Bubble Deck with 131m height
• Second Highest building in
Netherlands with 34 stores.
CASE STUDY:

14. 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

15. CONCLUSION:
• Obviously this intellectual slab design may become the
future of slab construction which gives a tremendous
contribution in Sustainable development