Earth bag construction presentation-ilonkamarselis_11.6.2015
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Transcript of Earth bag construction presentation-ilonkamarselis_11.6.2015
Why earth-bag building?- Low-tech, natural building technique
- Bullet, flood and earthquake proof
- Thermal mass
- Local
- Low-cost
- Easy
- No need for wood
- Organic shapes, retain spirit of nature
- Healthy
- Regulates humidity levels
Nepal
Earthbag construction vs. standard constructions after the Nepal earthquake
Nader Khalili’s Pegasus Childs orphanage
Some terminology on building with earth‐ Adobe – sundried mudbricks
‐ Sandbags
‐ Earthbags – tamped clay composition
‐ Superadobe – friction and tensile resistance
‐ Hyperadobe – knitted fabric with open netting
Adobe bricks Sandbags Earthbags Superadobe Hyperadobe bag
Plastic bags?‐ Discarded packaging bags‐ Cloth / jutten bags‐ Cal-Earth ‘ professional bags’‐ Cheaper polystyrene bags
Earth composition‐ Mix sand, water and earth
‐ Sticky in your hand but no fingerprints
‐ Adding cement = stabalized bags Only single sand bags, +20 years old
Stabalized sand tubes, cement added to sand
The NetherlandsInsulation?
‐ Two rings of earthbag with cavity between them
‐ Insulate wall, for exp. With straw
‐ Different earth composition, for exp. glassfoam granulate
High-rise?
‐ Adding 5 % aramide, keflar or coalfibre can create every strength
‐ Adding a compression ring halfway along the dome
All you need is‐ Earth‐ Bags / tubes‐ Shovel‐ Buckets‐ Stamper‐ Hammer‐ Spirit level‐ Chain‐ Stanley knife‐ Either barbed wire or wooden pegs‐ Measurer
No design?‐ Diameter gives shape of dome
‐ Along the way adjustments to environment
The ‘ design’ for our dome
First layer
Use of gravel instead of earth for strength Getting the perfect fold Stamping the entire cirkel
Moisture control
Waterproof foil after first layers Waterproof foil against outside, drainage pipe for rainwater
Keep checking
The spirit level across the circle The diameter of the dome The opening for the entrance
Earth bags vs. earth tubes
Less folds, easier shaping, more even, possible on your ownComplicated shapes, easy adjusting
Barbed wire vs. wooden pegs
After placing the bag, no adjustment possibleNot frienly and not natural
Faster, saver, easier, naturalMaking pegs can be a sore!
Making the top window
A piece of glass from the dump, placed under a slight slope and supported by wooden pegs
Covering an earth-bag dome‐ UV-light breaks down the plastic bags
‐ Rain and dirt can enter
‐ Better indoor environment
Dome needs:
- A hat
- A breathing coat
- Good boots
Finishing plasterA mix of sand, clay, water and wheat paste
Make different mixes, test them for cracks Apply the mix on a test wall Make a large batch
Natural painting- Paint based on clay- Mix clay, sand, pigment and wheat paste- Consistancy of quark- Pigments: colored clay, charcoal, dried flowers, spices
References‐ http://earthbagbuilding.com/index.htm info
‐ http://earthhandsandhouses.org/ workshops/projects
‐ http://calearth.org/ info/workshops
‐ http://www.joseandresvallejoarquitecto.com/ ‘modern’ architecture
‐ http://www.matthiasroth.org/SpiritualMusic_IndianHarmonium/Nepal.html a friend building in Nepal
‐ http://earthbagbuilding.com/projects/uganda.htm Uganda project
‐ http://www.naturalbuildingblog.com/earthbag-projects-in-haiti/ rebuilding Haiti
‐ Documentaries by Nader Khalili
‐ Building with earth – Paulina Wojciechowska
‐ Earthbag building guide – Owen Geiger
‐ Google: earth-bag building!
‐ Ask me: [email protected]