Woven-Strand Bamboo (WSB)

A composite of carbonized bamboo strands compressed with water-based adhesive has three times the density of natural bamboo, resists moisture absorption, swelling, and decay from bacteria and fungi.

Thin slices of bamboo stalk are carbonized, weaved and compressed to produce a composite which has three times the density of natural bamboo, resists moisture absorption, swelling, and decay from bacteria and fungi. The carbonisation processes is effective at eliminating all natural sugars in the bamboo material and therefore becoming unattractive for fungi and bacteria.

Uses

A common use is for flooring providing a more resistant and faster growing alternative to hardwood flooring.

Potential Uses

WSB is also being explored as a rebar (reinforced concrete) alternative to replace steel.  One such bamboo known as Dirk Hebel Bamboo is being tested by researchers (led by Dirk Hebel) at the Future Cities Laboratory in Singapore. The results have been positive however research continues on an alternative WSB manufacturing process that reduces potential damage to bamboo fibres caused by carbonisation.

Testing the strength of bamboo-reinforced concrete.
Dirk Hebel Bamboo strips are tested for strength and resistance to tensile forces.
This use would be particularly exciting given the environmental harm from high carbon intensity steel manufacture.

Processes

Engineering bamboo involves several processes designed to improve strength and longevity. In general the following steps are taken: 
1. Slice the bamboo into thin strips
2. Boil in water to cleanse
3. Carbonize bamboo through streaming or high temperature heating
4. Dry
5. Weave bamboo strips
6. Apply protective finish 

More Information

  • https://www.ambientbp.com/how-bamboo-flooring-is-manufactured.php
  • http://www.architectmagazine.com/technology/two-natural-rebar-alternatives-for-concrete_o