It help to reduce the maximum amount of plastic waste. Because plastic are used to make this u-boot, it reduce co2 emission, concrete quantity etc.,

1. PRESENTED BY
AKSHAYAPRIYADHARSHINI.V
SANTHOSHKUMAR .K.S
SECOND YEAR CIVIL ENGINEERING,
GOVERNMENT COLLEGE OF ENGINEERING,
SALEM.

2. contents
 Introduction
 Process
 Advantages
 Applications
 conclusion

3. INTRODUCTION OF U-BOOT
 In 2001 an Italian engineer, Roberto Il Grande,
developed and patented a new system of hollow
formers, in order to decrease the transportation costs
(and CO2 production). The U-Boot formwork is a
modular element made of re-cycled plastic for use in
building lighter structures in reinforced concrete cast
at the work-site The biggest advantage of U-boot is
reduce the concrete quantity
 U-boot® earliest projects were executed in 2002 and
since that time it has been used all over the world
 U-boot® system can be combined with other
technologies like pre-fabricated slabs and post
tensioned steel. The technology of hollow slabs with
post tensioned steel reduces the weight of slab and its
thickness.

4. u-boot Belton
 U boot Belton is made
up of Recycled
plastics

5. WHY WE GO FOR U-BOOT ?
 The main disadvantage of concrete constructions, in
case of horizontal slabs, is the high weight which
limits the span.
 For this reason, basic research in the field of
reinforced concrete structures have focused on
enhancing the span, either by reducing the weight or
overcoming concrete's natural weakness in tension.

6. MATERIALS FOR U-BOOT
TECHNOLOGY
 cement
 steel
 Fine aggregate
 Course aggregate
 Water
 Recycled plastic mould (u-boot shells)

7. CONSTRUCTION PROCESS OF U-BOOT
 Form work
 Reinforcement
 Placing of u-boot shells
 Placing of triangular reinforcement
 Concreting
 Curing

8. Form work
 Normal form work is laid to this type of u-boot
technology
 Steel form work or wood is used

9. Flat reinforcement
 On the form work the normal flat reinforcement is
provided
 In this reinforcement design is based on the two way
slab

10. Placing of u-boot shells
 The u-boot is placed in the as per design
 The shells having a corner needles for support the shell
 All shells are inter connected to steel rods
 In the steel rods look like a screws

11. Triangular reinforcement
 In the triangular reinforcement is provided for the
purpose of work as the beam
 Bottom horizontal rod is connected to the flat slab
reinforcement
 The top corner is connected to the shells connecting
rods

12. Concreting
 Concrete is laid 20% of the thickness of the slab for the
bind the concrete to the shells needle
 And compacted well.
 After the concrete is laid to the full depth of slab

13. Finishing
 The slab is makes smooth finishing in bottom ,top
and all corners of the slab

14. Shear resistance
 The main difference between a solid slab and a hollow
biaxial slab is a shear resistance. Due to the reduced
concrete volume, the shear resistance will also be
reduced.

15. Carrying capacity
 Test have shown that for a Bubble Deck slab with the
same load-carrying capacity can be used only 50% of the
concrete required for a solid slab, or with the same
thickness of a Bubble Deck slab the load-carrying
capacity can be increased up two times by using 65% of
concrete.

16. sound resistance
 Due to this bubble deck slab the concrete quantity is
less compared to normal solid slab and providing the
recycled plastic shells so the sound resistance is more.

17. u-boot Belton is Used for
 Residential buildings
 Hospital buildings
 Commercial buildings
 School buildings
 Public buildings

18. General benefits of the system
 Different building types have different advantages, but
general benefits in contrast to solid slabs are:
 Design Freedom
 Down stand beams and bearing walls eliminated
 Reducing overall costs
 Reduced Dead Weight
 Longer spans between columns
 Construction is less weather dependent

19. General benefits of the system
 Reduced foundation sizes
 Reduced concrete usage
 Environmentally Green and Sustainable
 Emits 1 ton of carbon dioxide (CO2)
 Consumes 5 million BTU of energy
 Uses 2 tons of raw materials
 Due to the Bubble Deck technology's green
credentials, the use of the Bubble Deck system
qualifies for LEED points in North America

20. Another use
 In this u boot Belton is used for not only in the slab
also used for foundation

21. Advantages
 U boot made up of recycled plastics
 U boot is used I the floor slab or foundation slab
 It is easy design ,easy technical ,economical
 Light weight
 Stress is discharged to directly to the beam slab and the load is
distributed to column directly and foundation
 Monolithic construction
 Load is distributed 2 direction in the slab and it is discharged
to the pillars and foundation
 In a slab reinforced portion in 2 way act as the t-beam in any
spacing
 Mushroom light pillars are encased to the slab
 Beam is fully avoided
 Pillars spacing is increased
 Thickness of the slab is reduced

22. PRACTICE OF U-BOOT
TECHNOLOGY IN THE WORLD
 Bergamo (Italy)
ITC-lab and research center
25,000 m2
 Naas (Ireland)
Shopping center
50,000 m2
 Sclay (France)
nanotechnologies research and
development center- CEA
22,000 m2

23. Conclusion
 According to the analysis such conclusion can be drawn:
 1. Due to the fact, that the structural behavior of this new kind of
monolithic flat slab is the same as for solid slab, excluding slab-edge
column connection, we surely can talk about appropriateness of use
and advantages of the new technology.
 2. Concrete usage is reduced – 1 kg of recycled plastic replaces 100 kg
of concrete. Reducing material consumption made it possible to make
the construction time faster, to reduce the overall costs. Besides that, it
has led to reduce dead weight up to 50%, which allow creating
foundation sizes smaller.
 3. The technology is environmentally green and sustainable. Avoiding
the cement production allows to reduce global CO2 emissions. The use
of the Bubble Deck system qualifies for LEED points in North
America.
 4. This technology is very prospective in modern construction and
perhaps future of civil engineering belongs to this new kind of hollow
slab.