This is a brief Presentation on the use of Bamboo as a Construction Material

1. BAMBOO as a CONSTRUCTION MATERIAL
DEVASHISH NEGI
( 160517 )
G.B.P.I.E.T. PAURI, UTTARAKHAND
01

2. What is Bamboo?
 Fastest growing woody grass
 Can grow up to 40cms a day
 Most important non timber forest resource
 Renewable and versatile resource
 More than 1200 species found
02

3. Other uses of bamboo
(apart from construction material )
 Traps
 Cages
 Tools
 Weapons
 Rafts
 Fences
 Water wheel
 Irrigation pipes
 Preventing soil erosion ( 1 bamboo plant can hold 6 cubic meter of soil )
03

4. Why bamboo?
 Fastest growing renewable building material
 Strong natural fiber
 Easily available
 Cost effective
 Enormous elasticity (earthquakes)
 Mostly, locally available
 Eco friendly
 Flexible
 Light in weight
04

5. Elasticity
05

6. Dendrocalamus asper
(giant bamboo or dragon bamboo)
06

7. Bambusa Arundinaceae
(the Indian thorny bamboo)
07

8. PROPERTIES of BAMBOO
 TENSILE STRENGTH
 COMPRESSIVE STRENGTH
 ELASTIC MODULUS
 ANISOTROPIC PROPERTIES
 SHRINKAGE
 FIRE RESISTANCE
08

9. TENSILE STRENGTH
 Resist more tension than compression
 Fibers run axially, are of highly elastic bundle, high tensile strength
 Tensile strength of steel is 2.5-3.0 times higher than bamboo
 Specific gravity of steel 6-8 times that of bamboo
 Tensile strength/unit weight bamboo is 3- 4 times that of steel.
 it’s not possible to construct connections that can transfer this
tensile strength
 bamboo unlike steel has a very poor tensile property and undergoes
brittle failure when loaded
09

10. COMPRESSIVE STRENGTH
 Slimmer the bamboo tube = more compressive strength
 Portion of lignin inside the culms affects compressive strength
 Clum = the hollow stem of a grass
10

11. ELASTIC MODULUS
 Higher the elastic modulus, higher is the quality of bamboo
 Due to highly strong fibers in the outer parts
 Useful property in areas with very high risks of earthquakes.
11

12. ANISOTROPIC PROPERTIES
 Bamboo is an anisotropic material
 Cellulose fibers in the longitudinal direction, strong and stiff
 In transverse direction there is lignin, which is soft and brittle
12

13. SHRINKAGE
 Bamboo shrinks more than wood when it loses water
 Shrinkage in cross section = 10-16 %
 Shrinkage in wall thickness = 15-17 %
13

14. FIRE RESISTANCE
 very good because of the high content of silicate acid
 when filled with water it can with stand a temperature of 400° C
 but will burn at high temperatures
14

15. TREATMENTS for BAMBOO
 REASON : life span is increased greatly after treatment
 METHODS:
1) BORAX – BORIC ACID PRESERVATION TREATMENT
2) NEEM SEED OIL TREATMENT
15

16. BAMBOO in REINFORCED
STRUCTURES
 During casting and curing of concrete reinforcing bamboo absorbs water and
expands
 The swelling of bamboo pushes the concrete away
 The bamboo loses the moisture, shrinks back to its original, leaving voids around
itself
 Thus a limitation for its use
 Application of a thin layer of epoxy to the bamboo surface followed by a coating
of fine sand.
16

17. BAMBOO in REINFORCED
STRUCTURES
 Still may used because:
1) strength is greater than that of steel
2) easily accessible
3) lowers the cost of construction
4) can crack and deflect more than steel reinforcement.
17

18. BAMBOO in REINFORCED
STRUCTURES
18

19. BAMBOO in REINFORCED
STRUCTURES
19

20. ADVANTAGES :
 Strength : an extremely strong natural fiber
 Flexibility : highly flexible
it may be trained to grow in unconventional shapes and after harvest, it may be bent
and utilized in archways and other curved areas
 Earthquake resistance : great capacity for shock absorption
 Lightweight
 Cost-effective : Economical, transporting cost is also much lesser.
20

21. Limitations
 Jointing techniques : efficiency of traditional joint is low
 Flammability
 Lack of design guidance and codification
 It requires preservation
 Untreated bamboo is subjected to fungi attack/insects
21

22. USES: 1) Bamboo Trusses
22

23. USES: 2) Bamboo Roofs Skeleton
23

24. USES: 3) Bamboo walling/ceiling
24

25. USES: 4) Bamboo Flooring
25

26. USES: 5) Bamboo Scaffolding
26

27. Conclusion
 Bamboo is used in our day to day life
 It’s a backbone of much rural life in our country
 It acts as a wood substitute, thus saving environment
27

28. REFERENCES
 Duggal S.K. Building Materials
 International Journal of Civil Engineering Research (IJCER), ISSN 2278-3652
Volume 5, Number 3 (2014), pp. 249-254
 International Journal of Advance Research and Innovative ideas in Education
(IJARIIE) ISSN(O)-2395-4396 Volume 3, Issue-1 2017
 International Research Journal of Engineering and Technology (IRJET), e-ISSN:
2395-0056, Volume: 05 Issue: 06-June-2018
 Journal of Civil Engineering and Environmental Technology, ISSN: 2349-879X;
Volume 1, Number 3; August, 2014 pp. 56-61
28

29. THANK YOU
29