Hello. This PPT is Bubble Deck Technology By Mukkara Raviteja From MITS, Madanapalli

1. Mukkara Raviteja
4th semi ,civil engineering
Madanapalle Institute of
Technology and Science(MITS)

2. BUBBLE DECK SLAB

3. CONTENTS
 Introduction
 Materials
 Advantages
 Experimental Study
 Scope of Future
 Conclusion

4. BACKGROUND
Compression
zone
Tensile zone
Central portion of RCC solid slab
(simply supported)
Problems with inactive concrete:
additional weight,
span limitations,
material wastage,
energy consumption

5.  Pre fabricated one way spanning concrete elements with
hollow cylinders, replacing inactive concrete
HOLLOW CORE SLABS
Problems:
Strength in one direction only
Inflexibility
Reduced architectural possibilities
Lack of structural integrity

6. 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.

7. WHY BUBBLE DECK SLAB ?
Flat slab technology
(no need of beams )
Longer spans
Pre fabricated
&
cast in-situ
No compromise for
strength& serviceability

8. MATERIALS
PLASTIC SPHERES
hollow spheres made
from 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 of
¾ inch.
STEEL –The steel
reinforcement is of MS or
HYSD can be used..

9. ADVANTAGES
Structural
Less weight
Increased strength
No need of beams
Only few columns required
Larger span
Free choice of Shape
Less foundation depth
Less excavation
required
15 m

10. ADVANTAGES
Construction
Light in weight less equipment is required
Easy incorporation of ducts and pipes into slab
Less work on construction site
Engineering
The biaxial flat slab system and columns are ideal
for structures with high resistance against
Explosions
These slabs and column system acts as an elastic
membrane which transfer horizontal forces to
stiff vertical structures which is used for
Earthquake resistant designs

11. ADVANTAGES
Environment
Less material and energy consumption
Reducing CO2 emission up to 40 kg/m2
1kg of plastic replaces 100kg of concrete
Every component can be recycled
Economy
Savings in materials
Transportation costs reduced
Faster construction time
Buildings can be more flexible and easy in
installations

12. EVERY 5000M2 OF BUBBLE DECK
FLOOR SLAB CAN SAVE
 1)1,000 m3 site concrete
 2)166 ready mix lorry trips
 3)1,745 GT energy used in concrete production
 4)1,798 tonner of foundation loads or a less piles
 5)270 tones of co2 green house gases emissions

13. SOLID SLAB VS. BUBBLE DESK SLAB

14. SOLID SLAB VS. BUBBLE DESK SLAB

15. 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

16. 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

17. 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

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

19. THANK YOU
For your attention

20. Bubble deck slab system
Mukkara.Raviteja
Department of civil Engineering
Madanapalle instruction of technology and science (MITS)
ABSTRACT
Bubble Deck is a revolutionary method of virtually eliminating
concrete from the middle of conventional slab which does not perform
any structural function, thereby dramatically reducing structural dead
weight by linking air and steel directly. Bubble Deck slab uses hollow
spherical or elliptical balls made by recycled plastic. A Bubble Deck
slab has a two-dimensional arrangement of voids within the slabs to
reduce self-weight. The behavior of Bubble Deck slabs is influenced by
the ratio of bubble diameter to slab thickness. This new prefabricated
construction technology is recently applied in many industrial projects
in the world. This shows the effectiveness and feasibility of the
application of Bubble Deck in the construction. Voids in the middle of a
flat slab eliminate 35% of a slab’s self-weight removing constraints of
high dead loads and short spans. Combination of recycled plastic
bubbles permits 50% longer spans between columns without any
beams. This provides a wide range of cost and construction benefits.
Usually the Bubble Deck system combines the benefits of factory-
manufactured elements in controlled conditions along with on-site
completion with the final monolithic concrete, resulting in a completed
floor slab. This paper presents a study on the properties and
advantages of Bubble Deck slab system
Key points In
Bubble Deck Slab
System
1)Preserves 30 to 50 %
weight than a
equivalent solid slab –
equal stiffness.
2)20% concrete
lessening in other
components.
3)The decreased weight
of the slab will lead to a
modification in design to
longer spans and/or
condensed deck
thickness.
4)It can be easily used
with seismic as it
minimizes the total
weight of the building.
5)Minimize concrete
usage – 1 kg recycled
plastic substitutes 100
kg of concrete.
6)With this system the
cost of the building is
decreased by 8 to 10 %.
SLAB
TYPE IN
BD
THICKNE
SS OF
SLABS IN
MASS
KG/sqm
BD280 280 450
BD340 340 550
BD390 390 640
BD450 450 730
Volume of solid slab = 1x1x0.23 = 0.23 m3. Volume of air
voids = 25 no 180mm diameter balls per m 2. Volume of
sphere is diameter3 x 0.5236. Therefore volume of each ball
is (0.18x0.18x0.18) x 0.5236 = 0.0030536 m3 x 25no. per m2 =
0.07634 m3. Net volume of 230mm thick Bubble Deck slab is
therefore 0.23 m3, minus 0.07634 m3 = 0.15366 m3. Mass of
230mm thick Bubble Deck slab is therefore 0.15366 m3 x
2400 kg/m2 (Weight of concrete with 2% reinforcement) =
368.8 kg/m2
What is the principle behind?
1)The area between columns of a solid slab has
limited structural effect beyond adding weight
2)Replacing that area with area with a grid of “voids
sandwiched between layers of reinforcing welded
wire steel and an internal lattice girder yields a slab
typically 35%.lightly that performs like solid
reinforcement concrete
Moment strength and
span
Thermal resistance
Every 5000m2 of bubble deck floor slab can
save:
1)1,000 m3 site concrete
2)166 ready mix lorry trips
3)1,745 GT energy used in concrete production
4)1,798 tonner of foundation loads or a less piles
5)270 tones of co2 green house gases emissions
Scope of future
use
1)Used for
constructing all
types of building
especially sky
scrapers
2)Best for larger
span halls like
theatres and
auditoriums
3Pedestrian bridge
decks
4)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
Reference
1)www.bubbledeck.com
2) IEEE-International
Conference On Advances In
Engineering, Science And
Management (ICAESM -2012)
March 30, 31, 2012