drying bamboo poles — guadua bamboo
TRANSCRIPT
Stéphane Schröder (/preservation/?author=53407b1be4b01b8f6b772224) · November
12, 2012 (/preservation/drying-bamboo-poles)
Drying Bamboo PolesDrying bamboo poles requires more time than wood of similar density. This because
bamboo possess hygroscopic materials (compound that easily absorbs moisture) that
may contain 50-60% moisture content, depending on the felling season, area of growth
and species.
When bamboo dries it contracts and shrinks. This shrinkage starts from the moment the
bamboo is cut, and can reduce the diameter of the bamboo poles (/bamboo-poles/) with
10% to 16%, and its wall thickness with 15% to 17%.
Green bamboo poles should not be used in construction (/construction/). Since green
bamboos are subject to shrinkage, joints (/working-with-bamboo/joining-bamboo) and
terminals may loosen after just a few weeks. Green bamboo is also more attractive
to insects and microorganisms, than dry bamboo.
How to Dry Bamboo Poles?
The most common way to dry bamboo for commercial purposes is "air drying". Once the
bamboo poles are harvested (/cultivation/when-and-how-to-harvest-
bamboo) and chemically treated, all poles should be stacked and stored under cover.
Important factors when drying bamboo:
It is most important to keep the
culms away from direct soil
contact to prevent fungal or insects-
attacks and to avoid the humidity of
the soil affecting the drying process.
It is recommended that only mature
bamboo culms (over 3 years) are
used to avoid collapsing of the
bamboo poles, due to excessive and
non-uniform shrink-age of the culm.
Remove infected culms from the
storage area.
Preservation
Chemical Treatment
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tag=Chemical+Treatment)
Drying Bamboo
(/preservation/?
tag=Drying+Bamboo)
Durability of Bamboo
(/preservation/?
tag=Durability+of+Bamboo)
Insect Infestation
(/preservation/?
tag=Insect+Infestation)
Leaching Bamboo
(/preservation/?
tag=Leaching+Bamboo)
Mold and Fungus
(/preservation/?
tag=Mold+and+Fungus)
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Drying Bamboo Poles
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Comments (5) Subscribe via e-mail
Tagged: Drying Bamboo (/preservation/?tag=Drying+Bamboo)
Thanks for your information, I am drying 14 fishing poles for spring fishing and tied
the bamboo poles to the top of a high branch and put a five lbs weight on the end
of the pole. I hope this works.
storage area.
Avoid rapid changes in moisture
content, for example by drying round
bamboo in direct sunlight for a
prolonged time. This can cause
cracks in the bamboo poles. Split
bamboos do not pose any problems
and can be dried in the open sun.
Provide good ventilation (air
circulation).
Vertical stacking gives faster drying and less chances of fungal attack. However, a
good support system should be in place to avoid the poles from bending.
Horizontal stacking is generally preferred for large stacks. Stacking should be done
on raised platforms, or placed on a thick plastic sheet to avoid soil contact. Use
separators between each row of bamboo for better air circulation. The culms at the
bottom of the stack may crack or bend due to the weight of a stack, therefore don't
pile up the bamboo poles too high.
For uniform drying, the bamboo poles should be rotated in the longitudinal
direction every 15 days.
Air drying round bamboo takes about 6-12 weeks. Drying time depends on:
Initial moisture content
Bamboo wall thickness
Environmental humidity
Quantity of solar radiation
The absence or presence of rain
Speed of the surrounding air
Other Methods to Dry and Store Bamboo
* Post-harvesting transpiration is a technique used by peasants or indigenous
communities. The procedure takes place on the bamboo plantation, and does not only
dry the bamboo stems, it is also a traditional way to preserve bamboo from insect
infestation.
The freshly cut bamboo stems are placed on a stone (to avoid soil contact). The stem is
placed upright, leaning against another bamboo tree with branches and leaves attached
for about 3-4 weeks. This way, bamboo stems lose their humidity progressively true
natural ventilation and transpiration true the leaves.
For more information about post-harvesting transpiration see: How to Harvest Bamboo
(/cultivation/when-and-how-to-harvest-bamboo).
* Storing bamboo in water is useful when bamboo needs to maintain its pliability or
when it needs to be processed in its "green" condition. Storage in water
causes leaching of starch (sugars) and is also used as a traditional bamboo preservation
technique.
* Kiln oven drying is at the present level of drying technology not recommended for
round bamboos. Even under mild drying conditions, higher temperatures can enhance
the incidence of cracking and collapse. Split bamboos, however, can easily be kiln oven
dried.
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Bamboo Insect Infestation(/preservation/bamboo-insect-infestation)
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Leaching Bamboo(/preservation/leaching-bamboo)
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Preview POST COMMENT…
Winston 8 months ago
Bamboo Poles
Wholesale (/wholesale-
bamboo-poles/)
Wholesale Bamboo Poles As a
producer and supplier of
bamboo in bulk worldwide, we
always strive to offer the best
quality at the most competitive
prices. We currently export
bamboo poles from China,
Indonesia and Colombia.
What is the drying method being adopted in Colombia with tubes running into
bamboo? Thanks in advance!
That's a technique called "el Pulpo" (invented by Jorg Stamm). All nodes are
perforated inside the bamboo in order to preserve them in large tanks with
boron salts. Afterwards hot air is forced through the poles which rapidly
reduces the moisture content.
I am developing drying schedule for round bamboo using kilns/ovens, need more
information.
Hi - I'm living in Guyana South America, and work as a missionary bush pilot. We
have lot's of bamboo along the rivers. I was thinking of building an aircraft hanger
out of bamboo, but I'm not sure how long it will last. Suggestions on how/how long
to cure the bamboo?
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Sven 8 months ago
(http://www.guaduabamboo.com/stephane-
schroder/)
Stéphane Schröder
(http://www.guaduabamboo.com/stephane-schroder/)
8 months ago
Fabian 8 months ago
(http://www.guyanaaviationevangelism.org)
James (http://www.guyanaaviationevangelism.org) 5 months ago
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