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Bamboo. A green building materials presentation by Hisa Kominami (CDAE170). Bamboos are a diverse and primitive group of perennial plants in the true grass family

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Bamboo l.jpg
Bamboo

A green building materials presentation by Hisa Kominami (CDAE170)


What is bamboo l.jpg

Bamboos are a diverse and primitive group of perennial plants in the true grass family

They are widely distributed throughout parts of the world, particularly in the Asia-Pacific region

It grows primarily in tropical and subtropical areas but several species grow in temperate areas

There are approximately 2000 species world wide, of which between 50 – 100 are being used by humans

Bamboo species vary in height from 1 ft to over 100 ft tall and have stem diameters ranging from 1 mm to 30 cm

Certain species can grow up to 1 ft/day!!

What is bamboo?


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Species Diversity plants in the true grass family


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Global Distribution of Bamboo plants in the true grass family


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Global Distribution of Bamboo plants in the true grass family


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Why is Bamboo important? plants in the true grass family

  • Ecological Role

    - Is excellent at sequestering carbon and releasing oxygen (can sequester up to 12 tons of carbon dioxide from the air per hectare and release 35% more oxygenthan equivalent stands of trees)

    - Prevents soil erosion and maintains watershed integrity and soil health

    - Provides habitats and food for a variety of species (Giant Panda, Mountain Bongo, lesser bamboo bat, etc)


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Why is Bamboo important? plants in the true grass family

  • Economic Role

    - The current estimated trade in bamboo is 5 billion U.S. dollars

    - Bamboo related industries provide food, income, and housing to over 2.2 billion people


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Multipurpose Crop For Humans plants in the true grass family

  • Fuel

  • Paper

  • Fodder

  • Furniture

  • Food (shoots, wine)

  • Musical Instruments

  • Traditional Chinese Medicine

  • Handicrafts (baskets, jewelry, pens, bicycles, fly rods)

  • Construction (homes, scaffolding, bridges, reinforced concrete, boats, fences)


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Bamboo in Construction plants in the true grass family

Five story parking garage at the Leipzig Zoo using bamboo for the building’s envelope


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Bamboo in Construction plants in the true grass family

Bridge by Jorg Stamm


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Bamboo in Construction plants in the true grass family

Bridge by Jorg Stamm


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Bamboo in Construction plants in the true grass family


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Bamboo in Construction plants in the true grass family


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Bamboo in Construction plants in the true grass family

Octagon Gazebo by Bamboo Technologies of Hawaii


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Benefits of Building with Bamboo plants in the true grass family

  • Can be harvested in 3-5 yrs. versus in 10-50 yrs. for softwoods and hardwoods

  • The yield (weight per acreage) for bamboo is 25% greater than that of timber

  • Has a tensile strength that rivals steel (withstands up to 52,000 psi)

  • Has twice the compressive strength of concrete

  • Resistant to earthquake damage and practical on steep slopes

  • Bamboo structures can be built very quickly, are low cost, durable, and environmentally friendly

  • The energy required in processing bamboo is less than for concrete, wood, and steel


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Benefits of Bamboo Flooring plants in the true grass family

  • Is available with formaldehyde free glues and low voc finishes

  • Aesthetically beautiful

  • Is comparable if not stronger than oak in terms of hardness (Janka Ball Test – 1320 PSI)

  • Bamboo exhibits little dimensional change compared to other commonly used woods (2.5x more stable)


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Potential for Sustainability plants in the true grass family

  • Renewable– can be harvested without damaging the plant and grows extremely quickly

  • Plentiful– there is great potential for timber-quality bamboo to be produced in the U.S.

  • Local– can be grown locally in a small land area

  • Waste-reducing– sequesters carbon and leaves can be used as fodder or compost


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Drawbacks of Bamboo plants in the true grass family

  • Untreated bamboo is susceptible to attack by fungi and insects

  • May or may not be harvested, manufactured, and shipped in an environmentally friendly manner

  • Exclusion from building codes and lack of standards


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