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BAMBOO
CONSTRUCTION


          TUSHAR CHOUDHARI
           ANKITA KOLAMKAR
            6th batch - PGP-ACM
INTRODUCTION…
ø Bamboo has been in wide usage since ancient times as a low-cost material
  for houses, bridges etc.
ø Rece...
Facts about bamboo
ø Bamboo is a perennial grass and not a
  tree as is commonly perceived.
ø 1450 species are found in di...
advantages
ø Strength - Bamboo is an
  extremely strong natural fibre, on
  par with standard hardwoods,
  when       cult...
advantages
ø Lightweight - Bamboo is extremely lightweight. Consequently, building
  with bamboo can be accomplished faste...
How to protect bamboo…
UNTREATED BAMBOO
ø Untreated bamboo has the following life
  spans in different conditions
 > Expos...
How to protect bamboo…
BORAX – BORIC ACID PRESERVATION TREATMENT




Depending       on      the   At the preservation
dia...
How to protect bamboo…
BORAX – BORIC ACID PRESERVATION TREATMENT




                                           Preservati...
How to protect bamboo…
                                      ø During the casting and curing of
                          ...
How to protect bamboo…
NEEM     SEED              OIL
                                   90
TREATMENT
                    ...
Bamboo foundations
COMPOSITE BAMBOO-CONCRETE FOUNDATIONS




Single Post Footing           Strip Footing
Bamboo foundations
BAMBOO PILES
ø Bamboo     compacts       soft
soil, thus increasing        the
bearing capacity of soil...
Bamboo foundations
BAMBOO PILES
                       ø The       sections
                       were then tied
        ...
Bamboo WALLS




        WOVEN         VERTICAL
                                           BAJAREQUE
      BAMBOO WALL   H...
RESISTANCE TO EARTHQUAKES
ø High residual strength to absorb
shocks and impacts.
ø Flexure coupled with its very low
mass....
MECHANICAL PROPERTIES

    Property                 Value
      Density             0.5 – 0.9 gm/cc

Compressive Strength ...
bamboo column AND BEAM




Bamboo Reinforced Column         Bamboo Beams
Comparative analysis


1200

1000

800

600

400

200

  0                                              Concrete
       Ra...
Comparative analysis
18000
16000
14000
12000
10000
 8000
 6000
 4000
 2000
    0




             Conventional Concrete

 ...
Comparative analysis

            Energy consumption during construction


8
7
6
5
4
3
2
1
0
    Concrete structure   Wood...
Limitations and drawbacks
Few considerations currently limit the use of bamboo as a universally
applicable construction ma...
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Bamboo construction (final ppt)

  1. 1. BAMBOO CONSTRUCTION TUSHAR CHOUDHARI ANKITA KOLAMKAR 6th batch - PGP-ACM
  2. 2. INTRODUCTION… ø Bamboo has been in wide usage since ancient times as a low-cost material for houses, bridges etc. ø Recently started appearing in designer homes as flooring, walling and paneling material ø Is viewed as a material preferred only by the poor or for temporary constructions ø Unpopular in conventional construction due to low durability, lack of structural design data, exclusion from building codes etc.
  3. 3. Facts about bamboo ø Bamboo is a perennial grass and not a tree as is commonly perceived. ø 1450 species are found in diverse climates across the world, however, not all of these are suitable for construction. ø One of the fastest growing plants on Earth. Its growth rate ranges from 30cm to 1 m in 24 hours. ø The strongest part of a bamboo stalk is its node, where branching occurs. ø Bamboo has also long been used as scaffolding; the practice has been banned in China for buildings over 6 storeys but is still in continuous use for skyscrapers in Hong Kong.
  4. 4. advantages ø Strength - Bamboo is an extremely strong natural fibre, on par with standard hardwoods, when cultivated, harvested, prepared and stored properly. ø Flexibility - Bamboo is highly flexible. During its growth, it may be trained to grow in unconventional shapes. After harvest, it may be bent and utilized in archways and other curved areas. ø Earthquake-resistance - It has a great capacity for shock absorption, which makes it particularly useful in earthquake- prone areas.
  5. 5. advantages ø Lightweight - Bamboo is extremely lightweight. Consequently, building with bamboo can be accomplished faster with simple tools than building with other materials. Cranes and other heavy machinery are rarely required. ø Cost-effective – Economical, especially in areas where it is cultivated and is readily available. Transporting cost is also much lesser. ø Durability - As long-lasting as its wooden correlates, when properly harvested and maintained.
  6. 6. How to protect bamboo… UNTREATED BAMBOO ø Untreated bamboo has the following life spans in different conditions > Exposure to soil and atmosphere = 1-3 years > Under cover = 4-7 years > Very favourable conditions = 10-15 years ø Natural durability also depends on the species of the bamboo PRE-HARVEST AND POST HARVEST PRECAUTIONS ø Felling during low sugar content season i.e. dry season ø Felling of mature bamboo ø Post harvesting transpiration ø Water soaking
  7. 7. How to protect bamboo… BORAX – BORIC ACID PRESERVATION TREATMENT Depending on the At the preservation diameter of the bamboo, treatment pool, bamboo different sized drill bits, soaks in borax-boric acid attached to a long steel solution (1:1.4) for 2 days rod, are used to drill into to allow the mineral to Bamboo is removed the centre of the bamboo penetrate all the nodes and stacked culms throughout their and diaphragms. vertically so the whole length. solution can drain and be reused.
  8. 8. How to protect bamboo… BORAX – BORIC ACID PRESERVATION TREATMENT Preservative solution is Next, the bamboo The bamboo poles recharged after four cycles by poles are left to are left to dry adding water and the chemicals. bask in the sun slowly in a Preservation treatment costs a depending on the cool, dry place minimum charge of INR 4.50 amount of sunlight until they are used per pole. for construction.
  9. 9. How to protect bamboo… ø During the casting and curing of concrete, reinforcing bamboo absorbs water and expands ø The swelling of bamboo pushes the concrete away ø Then at the end of the curing period, the bamboo loses the moisture and shrinks back almost to its original dimensions leaving voids around itself ø The swelling and shrinkage of bamboo in concrete create a serious limitation in the use of bamboo as a substitute for steel in concrete. ø One effective treatment is the application of a thin layer of epoxy to the bamboo surface followed by a coating of fine sand.
  10. 10. How to protect bamboo… NEEM SEED OIL 90 TREATMENT 80 70 ø Oil obtained from neem seeds 60 can be used to improve water 50 resistance and dimensional 40 stability of bamboo culms 30 particularly at high oil- 20 treatment temperature. 10 0 ø Bamboo samples soaked in hot neem seed oil at 60°C for 4 hours had better water resistance and dimensional Soaked bamboo samples at room stability than samples soaked in temperature for 24 hours oil at room temperature for 24 Soaked bamboo samples at 60°C for 4 hours hours. SHRINKAGE REDUCTION
  11. 11. Bamboo foundations COMPOSITE BAMBOO-CONCRETE FOUNDATIONS Single Post Footing Strip Footing
  12. 12. Bamboo foundations BAMBOO PILES ø Bamboo compacts soft soil, thus increasing the bearing capacity of soil. ø The friction provided by the construction-grade bamboo increases its load-bearing capacity. ø Treated split bamboo piles 8m long and 80 to 90mm in diameter were filled with A sustainable house in coconut coir strands wrapped Thiruvananthapuram, Kerala where bamboo with jute. piles have been used as foundation . The foundation is further strengthened by bamboo reinforced concrete.
  13. 13. Bamboo foundations BAMBOO PILES ø The sections were then tied with galvanised iron wire. After installation of the piles @2m c/c by drop hammer, the area is covered with a 2.5m surcharge of sandy material.
  14. 14. Bamboo WALLS WOVEN VERTICAL BAJAREQUE BAMBOO WALL HALVED CULMS WHOLE BAMBOO CULMS WATTLE AND DAUB
  15. 15. RESISTANCE TO EARTHQUAKES ø High residual strength to absorb shocks and impacts. ø Flexure coupled with its very low mass. ø A bamboo house in Bhutan that withstood an earthquake that occurred at Sikkim (epicenter) measuring 6.9 in September 2011 ø Prototype house built with bamboo sheet roofing and bamboo-reinforced ø 30 houses at the epicenter of a concrete walls withstood a simulated 7.6 magnitude earthquake earthquake measuring 7.8 on the survived without any damage in Richter scale Costa Rica in 1991
  16. 16. MECHANICAL PROPERTIES Property Value Density 0.5 – 0.9 gm/cc Compressive Strength 53 – 100 MPa Tensile Strength 111 – 219 MPa Bending Strength 86 – 229 MPa Bending Elasticity 6882 – 20890 MPa
  17. 17. bamboo column AND BEAM Bamboo Reinforced Column Bamboo Beams
  18. 18. Comparative analysis 1200 1000 800 600 400 200 0 Concrete Rate of construction per sq.foot in INR Bamboo
  19. 19. Comparative analysis 18000 16000 14000 12000 10000 8000 6000 4000 2000 0 Conventional Concrete Bamboo Reinforced Concrete
  20. 20. Comparative analysis Energy consumption during construction 8 7 6 5 4 3 2 1 0 Concrete structure Wood structure Bamboo structure
  21. 21. Limitations and drawbacks Few considerations currently limit the use of bamboo as a universally applicable construction material ø Jointing techniques - Although many traditional joint types exist, their structural efficiency is low. Considerable research has been directed at the development of more effective methods. ø Flammability - Bamboo structures are not fire-resistant, and the cost of treatment, where available, is relatively high. ø Lack of design guidance and codification - The engineering design of bamboo structures has not yet been fully addressed. There is little or no data containing specifications of bamboo.
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