Bamboo-CHANGING LIVES !!!
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An introduction to bamboo with all the essentials required to have the knowledge of bamboo as an unconventional material in engineering.
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Bamboo-CHANGING LIVES !!!
- 2. PRESENTED BY: BHANU PRATAP CIVIL ENGINEERING FINAL YEAR
- 3. ?
- 4. Tribe – Bambuseae Family – Gramineae About 60 to 70 genera and 1200 to 1500 species in world. Half of these species grow in Asia. 136 species in India.
- 5. The Rhizome spreads horizontally beneath the soil and produces both roots and shoots from its nodes.
- 21. Concrete Bamboo 1200 500 Rate of construction per sq.foot in INR
- 22. ENERGY CONSUMPTION DURING CONSTRUCTION 8 7 6 5 4 3 2 1 0 Concrete structure Wood structure Bamboo structure
- 27. Soaked bamboo samples at room temperature for 24 hours Soaked bamboo samples at 60°C for 4 hours 89.21 86.39 66.85 28.89 6.07 3.78 Longitudinally Radially Tangentially SHRINKAGE REDUCTION
- 28. Single Post Footing Strip Footing
- 33. 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
- 43. [1] Literature review on bamboo By M Ahmad. [2] www.authorstream.com Introduction by Dr. PN Mishra [3] www.bamboohouseindia.org and www.greenlivelihoods.org, Hyderabad [4] Blog.builddirect.com [5] Inspirationgreen.com [6] Bamboo in construction by D.L Jayanetti and P.H Follett. [7] Bamboo construction By NICHOLAS SOCRATES. [8] Bamboo design and construction in Philippines. [10] Bamboo as reinforcement in structural concrete elements by Khosrow Ghavami. [11] Performance Evaluation of Bamboo Reinforced Concrete Beam by M. M. Rahman, M. H. Rashid, M. A. Hossain*, M. T. Hasan and M. K. Hasan
Notas do Editor
- Five Reasons:1. Itmatures in 3 years.2. Bamboo produces 35% more oxygen than any other tree.3. It is a renewable resource.4. Bamboo is more elastic in comparison to wood.5. Bamboo’s tensile strength is 28000 psi versus 23000 psi for steel.
- North-East
- Grows at phenomenal rate of 20-25 cm per day.Bamboo survived the Hiroshima atomic blast closer to ground zero and provided the first re-greening after the blast in 1945.Thomas Edison First light bulb used filament made of carbonized bamboo. This bulb still burns today in Smithsonian museum.A sixty-foot tree cut for market takes 60 years to replace. A sixty-foot bamboo cut for market takes 59 days to replace. A single bamboo clump can produce up to 15 kilometers of usable pole (up to 30 cm in diameter) in its lifetime.
- There are more than 1500 documented uses of bamboo and around 5000 bamboo applications which has not been documented. I will not be capable of showing you all its uses but instead of it I can show you the diversity of uses of bamboo.
- Imagine What Ii is ?
- Bamboo comes with so many surprises that amazed everyone.
- Bamboo is an extremely strong natural fibre, on par with standard hardwoods, when cultivated, harvested, prepared and stored properly.
- 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.
- It has a great capacity for shock absorption, which makes it particularly useful in earthquake-prone areas. It is not rigid.A bamboo house in Bhutan that withstood an earthquake that occurred at Sikkim (epicenter) measuring 6.9 in September 2011
- Consequently, building with bamboo can be accomplished faster with simple tools than building with other materials. Cranes and other heavy machinery are rarely required. More economy because transportation cost is reduced…
- Less durable but after proper treatment durability can be maintained.
- Untreated bamboo :Exposure to soil and atmosphere = 1-3 yearsUnder cover = 4-7 yearsVery favorable conditions = 10-15 years.Natural durability also depends on the species of the bamboo
- 1. Depending on the diameter of the bamboo, different sized drill bits, attached to a long steel rod, are used to drill into the centre of the bamboo culms throughout their whole length.2. At the preservation treatment pool, bamboo soaks in borax-boric acid solution (1:1.4) for 2 days to allow the mineral to penetrate all the nodes and diaphragms.3.Bamboo is removed and stacked vertically so the solution can drain and be reused.
- 4.Next, the bamboo poles are left to bask in the sun depending on the amount of sunlight5.The bamboo poles are left to dry slowly in a cool, dry place until they are used for construction.6.Preservative solution is recharged after four cycles by adding water and the chemicals. Preservation treatment costs a minimum charge of INR 4.50 per pole.
- One effective treatment is the application of a thin layer of epoxy to the bamboo surface followed by a coating of fine sand.
- COMPOSITE BAMBOO-CONCRETE FOUNDATIONS
- 1. Treated split bamboo piles 8m long and 80 to 90mm in diameter were filled with coconut coir strands wrapped with jute.2. 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.
- A sustainable house in Thiruvananthapuram, Kerala where bamboo piles have been used as foundation . The foundation is further strengthened by bamboo reinforced concrete.
- With time every thing deteriorate. So as reinforcement but what is surprising is that bamboo reif. If treated it will not loose its more tensile strength….
- Simply supported bamboo reinforced concrete beams, fabricated with normal, lightweight and laterite aggregates of 20mm maximum size have been tested. A beam, reinforced with steel bars, served as reference. Throughout the research programs ordinary Portland cement CP-32 and natural-washed river sand were used. The normal concrete was proportioned 1:1.4:2.4 by weight with a water cement ratio of 0.45; and the proportions for lightweight concrete were 1:3.22:0.78 of cement, fine and coarse aggregate with a water cement ratio of 0.55 respectively. The compressive strength of the concrete was established on 15cm diameter and 30cm high cylinders. The split bamboo culms were of 30mm wide rectangular sections. The smooth surface of the bamboo splints was cleaned and slightly roughened before being coated with a thin layer of the impermeable product together with sand. The pieces were then wrapped with 1.5mm wire at 10mm distance and once more coated with the same product. Immediately after that, fine sand was manually pressed into the surface and the splints were allowed to dry for 24h before being fixed inside the formwork as can be seen in Fig. 10(a). The bamboo reinforcing ratio, q, varied between 0.75% and 5.00%. The beams of dimensions 340 · 12 · 30cm, with afree span of 300cm, were fabricated inside a form, intowhich concrete was poured in layers of 10cm. Thenthe form was vibrated as recommended by the BrazilianNorms. The beams were tested after a curing period of28days, both at PUC-Rio and the Federal Universityof Paraiba (UFPb). Fig. 10(b) shows the experimentalset up of a beam subjected to two-point load at the thirdspan.The test results showed that the treatment of bambooprior to use improved the bamboo–concrete bonding bymore than 100%. By adopting q = 3% as the ideal value,the ultimate applied load increased by 400% as comparedwith concrete beams without reinforcement
- One of the important factors, which has a great influence on the ultimate load of the slab, is the shear resistance of the bamboo diaphragm. To increase the shear strength of half bamboo several alternatives were considered. To improve further a strip of steel or bamboo rod close to the bamboo diaphragm passing through the bamboo diameter was fixed.