The document summarizes a presentation on bubble deck technology. Bubble deck slabs are biaxial hollow core slabs that dramatically reduce structural weight by replacing inactive concrete in the middle with hollow plastic spheres. This allows for longer spans, faster construction, and elimination of beams. Experimental studies show bubble deck slabs have 80% of the shear strength and similar deflections compared to solid slabs, but are 40% lighter. References discussed bubble deck slabs being more efficient than traditional slabs for office floors while not as effective for bridges. The technology reduces material needs and CO2 emissions.

1. Adichunchanagiri Institute of Technology,
Chikkamagaluru
(Affiliated to Visvesvaraya Technological University, Belagavi)
Technical seminar
Presentation on
Department of Civil Engineering
Presented By
S SANJAY 4AI19CV057
“BUBBLE DECK TECHNOLOGY”
PROJECT COORDINATORS
Mrs. SHURTHI C G
Assistant Professor
Mrs. KAVYA BR
Assistant Professor
Under the guidance of
Mr. SANJITH J
Assistant Professor
Department of Civil engineering
AIT, Chikkamagaluru

2. • BUBBLE deck slab is a biaxial hollow core slab invented in Denmark. It is a method of
virtually eliminating all concrete from the middle of a floor slab not performing any structural
function thereby dramatically reducing structural dead weight.
• Bubble deck slab is based on a new patented technique which involves the direct way of
linking air and steel.
• The system allows for the realization of longer spans, more rapid and less expensive erection,
as well as the elimination of down-stand beams.
• The Bubble deck slab floor system can be used for storey floors, roof floors and ground floor
slabs
INTRODUCTION

3. OBJECTIVE
• To improve the construction technique.
• To reduce the self weight of slab and also reduce the quantity of slab,To
achieve the main factor of construction which is economic.
• Low material as compared to conventional slab material

4. Problems with inactive concrete:
additional weight,
span limitations,
material wastage,
energy consumption
METHADOLOGY

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
HOLLOW CORE SLAB

6. 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.
BUBBLE DECK SLAB

7. 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 • Doesn’t
react chemically
with concrete or
steel
CONCRETE-the concrete is made of standard
Portland cement with max aggregate size of ¾
inch.
MATERIAL

8. • Less weight
• Increased strength
• No need of beams
• Only few columns required
• Larger span
• Free choice of Shape
•Less foundation depth
• Less excavation required
ADVANTAGES

9. 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
Environment
Less material and energy consumption
Reducing CO2 emission up to 40 kg/m2
1kg of plastic replaces 100kg of concrete
Economy
Savings in materials
Transportation costs reduced
Faster construction time

10. 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
EXPERIMENTAL STUDIES

11. 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

12. 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
SCOPE OF FUTURE USE

13. • Weight reduction is 50% compared to solid.
• The bubble deck technology is environmentally green and sustainable; avoiding the cement
production allows reducing global Co2 emissions.
• In comparative of conventional slab the volume of concrete in bubble deck (continuous) are less
required, that is 25% approximate.
• Cost and time saving by using bubbles in the slab like weight of slab, concrete volume
indirectly load on the beam and walls also decrease/ less so that building foundations can be
designed for smaller dead loads.
SUMMARY

14. [1] Tina Lai1, “Structural behaviour of bubble deck slab and their applications to lightweight
bridge decks”, MIT, 2009
[2] P. Prabhu Teja1, P. Vijay Kumar1, S. Anusha1, CH. Mounika1, Purnachandra Saha2,
“Structural behaviour of bubble deck slab”,
ICAESN, March-30,31,2012
[3] Amer M. Ibrahim1, Nazar K. Ali2, Wissam D. Salman3, “Flexural capacities of
reinforced concrete two-way bubble deck slabs
of plastic spherical voids”, DJES, ISSN 1999-8716, Volume: 06, No.02, June-2013
[4] M. Surendar1, M. Ranjitham2, “Numerical and experimental study on bubble deck slab
research”, IJESC, ISSN 2321 3361,
Volume: 6, Issue No.5, 2016
REFERENCES

15. Tina Lai et.al.,(2009): Worked on structural behaviour of bubble deck slab and their
applications to lightweight bridge decks. In this
paper they concluded that bubble deck technology is more efficient than a traditional
biaxial concrete slab in an office floor system.
The finite element models of the office slabs created for this study in SAP 2000 verify
the prior analysis and experiment. However, the
performance of the voided slab is not as successful in a pedestrian bridge deck.
P. Prabhu Teja et.al., (2012): In this paper they worked on structural behaviour of bubble
deck slab. They aimed to discuss abouY
verified using finite element method in SAP 2000. They concluded that the market of
construction floors in the building industry
construction technology was proven to be more efficient than a traditional biaxial
concrete slab. They concluded that bending stresses
in the bubble deck slab are found to be 6.43% lesser than that of a solid slab, deflection is
5.88% more than the solid slab, shear
Amer M Ibrahim et.al., (2013): A study has been conducted on the flexural strength of
reinforced two-way bubble deck reduce the
self-weight of the slabs. A bubble deck slab as a two-dimensional arrangement of voids.
The behaviour of bubble deck slabs was
determined by the ratio of bubble diameter to slab thickness. To verify the flexural
behaviour of bubble deck slab such as ultimate.
LITERATURE REVIEW

16. THANK YOU