Eco House Project - Rammed Earth
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Transcript of Eco House Project - Rammed Earth
![Page 1: Eco House Project - Rammed Earth](https://reader033.fdocuments.us/reader033/viewer/2022052302/5a66ccda7f8b9a21208b49eb/html5/thumbnails/1.jpg)
The Nebraska House Projectby Keith Mikkelson and Brian Shafer
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Aloha House is developing an ecological village to better cater to its
social welfare services participants. It operates a children’s home on an
urban farm in Puerto Princesa City, Palawan, Philippines as well as a 7-
hectare sustainable farm and community development called Aloha
Ranch and Organic Farm.
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Aloha Ranch and
Organic FarmAn Eco Village Half way to the
Underground River
Aloha HouseAn Orphanage on an Organic Farm
Aloha KitchenArtisan Farmstead Cheeses, Salsas, Jams and more
2 hectares5 acres
13 rai
31 dou
7 hectares17 acres
43 rai
108 dou
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Aloha Ranch and Organic Farm is an Eco-village with sustainable practices
integrated into the entire design. The farm is certified Organic in the
Philippines and supplies local chefs, restaurants and families in the
community. The featured building in this article is a structurally self-
supporting rammed earth house without any steel reinforced cement
columns. The monolithic rammed earth walls are the columns! A team of four
builders on Aloha Ranch completed this third house on the site during the
fall months of 2015.
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The Nebraska House
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Aloha Ranch and Organic Farm
An Ecological Village for Permaculture Enthusiasts
Vision
See entire communities empowered with sustainable living by the grace of God
Mission
Equip people and develop sites that utilize and practice permanent agriculture at
the household and community level with a shared land ethic
Goals
Develop a highly productive ecological system on a 7 hectare site
Integrate people by building hybrid earthen housing for residents and visitors
Equip the neighboring community to participate in the prosperity of the system
Living with a Land Ethic that builds people,
soils, food, ecology and the planet!
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On site mapping/progress
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The rammed earth house is now listed on the map as “The Nebraska House”
indicating the origin of the builder. It was designed with a native bamboo nipa
thatched roof and was completed by three of my trained earth builders plus one
student laboring for 243 paid man-hours with a final cost of under $3,000.00 An
additional 100+ hours of owner and student labor was invested in this project.
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Rammed Earth Mushroom House
Hybrid Earthen Home Building Course November 2014
Aloha House Philippines
Brian Shafer
Keith Mikkelson
The student builder, Brian Shafer, was an intern at Aloha House and had
experience with rammed earth while building a mushroom house at our urban
farm and orphanage.
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Brian saw first hand the
benefits of lightweight
insulative-rammed earth living
on an ecological village
integrated with the
environment. In regards to
additional labor, it was I, Keith
Mikkelson, project supervisor
and designer who spent
approximately 45 hours on the
project designing, consulting,
checking on plan compliance
and troubleshooting. We
learned many things on this
third structure. One of our
challenges was rain; it was our
first project during rainy season
and earth structures need to be
protected from the rains. A
temporary tarp system was
implemented.
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Earth as a building material comes in many different compositions and can be
processed into a highly insulative lightweight material for tropical living. Rice husk
(hull) is 50% of the wall material offering amazing insulative qualities. Loam as a
clayey soil has different names when used in various applications. Rammed earth,
soil blocks, mud bricks and adobe are all ancient earth building methods. Often
sand and clay is balanced with straw for cob construction. Our building technique
utilizes a moistened blend of 3 parts rice hull and 2 parts high clay loam (40%
clay) with 3% stabilization using Portland cement and rice hull ash with inert
agricultural limestone added to keep termites out. It is one of the few building
techniques that can be done successfully with a cement mixer.
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Manual ramming or tamping is firm
but the wall material is not
compacted to the point of removing
air space in the rice hull. The mixture
is loaded in the form and leveled to
10 cm and tamped down to 6-7 cm.
The lightweight loam is dumped into
a movable slip form that is raised as
the tamping is completed in the two-
foot form. A team of four men can
ram a 240 cm. wide wall 20 cm. wide
up to 3 meters in one day. Electrical
conduit was rammed into the wall as
it was built. Wood was timbered on
site and the owner/builder harvested
the necessary boards that were then
finished by the carpenter on the
team. A fixing agent (ethylene glycol)
was used to penetrate the wood and
bamboo timbers by boiling the glycol
in a kettle and then adding the two
boron forms. All bamboo was
glycol/boron treated with a
paintbrush.
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We design for earthquake and typhoon resistant structures. Our structures are
hexagonal to withstand lateral forces during earthquakes or tidal wave / tsunami
intrusion. The hexagon has strengths that are unique in structural design. Our
design is based on Dr. Gernot Minke’s research conducted continuously at the
Forschungslabor fur Experimentelles Bauen (Building Research Institute) at the
University of Kassel in Germany since 1978. We utilized his book Building with
Earth: Design and Technology of a Sustainable Architecture for our design. The
inner living space measures 19 sq. meters (203 sq. ft.) and the house has an out
door kitchen and patio area of 20 sq. meters including the shower and composting
toilet. A rammed earth rocket stove utilizes sticks from the forest to efficiently
produce heat for cooking. Poured concrete pavers were chosen for their durability
and treated with an acid stain of iron sulphate (a fertilizer) and sealed with slate
sealant.
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Other sustainable design features include gutters for rainwater catchment with the
over flow maintaining a small fishpond. A rammed earthen herb spiral and
vegetable garden is included as well as a small green house nursery. Bottle lights
were installed to bring in natural light to the out door kitchen. An evaporative cooler
(Zeer cooler) was built to keep produce fresh and cheeses from over ripening. A
Pompeii dome rammed earth rocket oven was added 2 years later to supply fresh
baked bread, pizza and other roasted foods. Insect screening will be added for our
next houseguests and solar power will be retrofitted. Electrical conduit was rammed
into the wall as it was built.
The structure integrates with
our Permaculture Master Plan
and will serve many students
and guests in the coming years.
Low Thermal mass rocket stoves
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We are now building the next structure across from the Nebraska House with
additional features as we learn and implement our techniques
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Mushroom House
Cooking School
Culinary School
Food Processing Lab
Restaurant
Farm Store
Bakery (WFO)
Staff Kitchen
Green House
Eco Village
Staff Housing
Mik House
Training Area
OrphanageAgriculture
Habitation
Production
Picnic Area
Water Slide
Raised Beds
Orchards
Livestock
Creamery
Charcoal
Pre-School
Dairy
✔Fencing ✔Deep well
✔Carpenters shed
Coffee Shop
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40m
30m
20m
20m30m
SPRING FED
Nebraska
House
Site Elevations
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SPRING FED
Nebraska
House
House Integration
for Zone Planning
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KeyZone 1 & 2
SPRING FED
Nebraska
House
House Integration
for Zone Planning
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KeyZone 1 & 2
Zone 3
SPRING FED
Nebraska
House
House Integration
for Zone Planning
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Key
Zone 1 & 2
Zone 3
Zone 4
SPRING FED
Nebraska
House
House Integration
for Zone Planning
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Zone 1 & 2
Zone 3
Zone 4
Zone 5
Key
SPRING FED
Nebraska
House
House Integration
for Zone Planning
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Nebraska
House
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Plinth
Structural wall
40cm
20cm
Hybrid Earthen Home
Foundation detail
EH 3
12mm RCB
THE
BUILD
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Hybrid Earthen Home
Foundation detail
EH 3
THE
BUILD
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Hybrid Earthen Home
Foundation detail
EH 3
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1 Binder
2 clay soil
3 Ricehull
5-10 liters water
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Hybrid Earthen Homes
Rammed Window
EH 3
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Formwork
2 Ends [1/2 round]
2 9 ft shuttering
4 slotted angle bar
8 rod bracing
8 wing nut
1 framing for ends
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Hybrid Earthen Homes
Shuttering Formwork
EH 3
Formwork
2 Ends[1/2 round]
2 9 ft shuttering
4 slotted angle bar
8 rod bracing
8 wing nut
1 framing for ends
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Hybrid Earthen Homes
Filling form holes
EH 3
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Hybrid Earthen Homes
Wall One
EH 3
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Hybrid Earthen Homes
Landscape detail
EH 3
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Hybrid Earthen Homes
Extra materials form
EH 3
Aloha
Tools/machines
cement mixer
lime paint mixer
cordless drill
trowels
plum
hose level
spirit level
shovels
bolo
planer
chainsaw
hack saw
wood saw
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For Compression testing
Extra materials form
EH 3
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Hybrid Earthen Homes
Lime/whey primer
EH 3
…albuminate…
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Hybrid Earthen Homes
Soil Audit: 40% clay
EH 3
clay
silt
sand
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Hybrid Earthen Homes
Lime/whey/clay finish
EH 3
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Nailess bamboo roof
EH 3
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Nailess bamboo roof
EH 3
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Nailess bamboo roof
EH 3
Hardwood dowel
Fish mouth joint
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Locally harvested bamboo
EH 3
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Nailess bamboo roof
EH 3
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Nipa roof tiles
EH 3
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Bamboo & Nipa
thatch roof
EH 3
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Nailess bamboo roof
EH 3
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Free on site Timbers
EH 3
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Free on site Timbers
EH 3
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On site consultation
EH 3
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Rammed earthen floor
EH 3
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Rammed earthen floor
EH 3
3 pails clay
1 pail sand
¼ pail Portland
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Rammed earthen floor
EH 3
3 pail clay
1 pail sand
¼ pail Portland
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Rammed earthen floor
EH 3
Troweled-burnished
Tung oiled
Waxed
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Kyle Holzhueter
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Choosing the right steel for you depends on your purpose:
Jigane is unfired forged iron. Whereas a hard carbon steel tends to slide over a plaster, "soft"
jigane iron will push and pull material, making it excellent at distributing plaster on wall. By
"soft", we refer to the quality of the steel, not the flexibility of the trowel. Because Jigane is a
soft steel, Jigane trowels tend to be thick, stiff and heavy. Jigane is suitable for scratch and
brown coats of earthen or lime plaster.
Hanyaki is fired once after forging. Hanyaki is suitable for all coats, and can also be used for
cement based plasters as well.
Abarayaki is steel that is forged, coated with oil, and then fired twice. It is harder than hanyaki
and suitable for compressing plaster for a glossy finish.
Honyaki is made in a similar fashion to abarayaki, but is fired at a higher temperature. Being a
very hard carbon steel, it is suitable for earthen or lime finish coats and cement based plasters.
Stainless steel is the hardest steel but can be produced so thin as to be flexible as well. It is
used to apply thin coats and to smooth trowels marks.
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Rammed earthen floor
EH 3
Lived in
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Rammed earthen floor
EH 3
Zeer cooler
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Nipa roof tiles
EH 3
Acid stained pavers
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Hybrid Earthen Homes
Nipa roof tiles
EH 3
Rammed herb spiral
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Rammed herb spiral
EH 3
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Rammed herb spiral
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Rammed herb spiral
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Rammed herb spiral
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Rammed herb spiral
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Rammed herb spiral
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Rammed herb spiral
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Community kitchen
EH 3
Lived in
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Community kitchen
EH 3
Lived in
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Banana circle
EH 3
Lived in
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Rammed earthen house
EH 3
Lived in
Gutters
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120 watt
Bottle lights Water catchment
Shower/com
posting toilet
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Rammed earthen floor
EH 3
High Thermal mass rocket stoves
Low Thermal mass rocket stoves
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Rammed earthen
rocket stove
EH 3
Rice hull gasifier
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Natural Sealants
Varnish Free Living
Tung oil
Ipil hardwood
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Pure Tung Oil comes from cold pressing of the seeds or nuts of the Tung tree. Tung trees mainly
grow in the mountainous regions of china away from industrialization and pollution. Climate, soil and
air quality are essential for a high quality oil. Our 100% Pure Chinese Tung Oil or China wood oil is a
all natural finish manufactured by pressing the tung nut, no petroleum distillates or other additives -
just Pure Tung Oil. All Pure Tung Oils are not the same. Some low priced marketers will package
South American Tung Oil (dark, greenish in color) and sell its as the higher quality Chinese Tung
Oils. Chinese Pure Tung Oil is available in 3 grades, we only offer the best available, Grade 1 yellow.
A better quality Pure Chinese Tung Oil will offer superior color, faster drying and a long term elastic
finish. Elasticity is a important factor as the oil must continue to flex with the expansion and
contraction of the substrate on which it is applied.
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Citrus Natural Solvent, a paint thinner alternative, is used as a direct replacement for mineral spirits and
odorless mineral spirits. Citrus Solvent can be used wherever paint thinner or mineral spirits are required as
a natural, safer alternative. Citrus Solvent is not the same as any of the other "citrus-branded" cleaning
products on the market, including Citrus Solve or Citri-Solve. It is, however, an excellent degreaser, paint
thinner alternative, and can be used to replace petroleum chemicals such as mineral spirits. Citrus Solvent is
98% pure citrus peel oil extracted from the peel of the orange fruit; the other 2% is water. This small amount
of water is emulsified in the solvent and will not raise wood grain but is released into the air as the solvent
evaporates.
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Natural Sealants
Varnish Free Living
Tung oil
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Bamboo treatment
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Before
After
Varnish Free Living
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Natural Sealants
Varnish Free Living
Tung oil
Tung oil
Tung oil
Stained Concrete
Stained Concrete
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http://alsnetbiz.com/homeimprovement/homemade.html
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Aloha RanchMacarascas
Rammed
Rocket Stove
Low Thermal mass rocket stoves
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Rammed
Rocket Stove
Low Thermal mass rocket stoves
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Rammed
Rocket Stove
Low Thermal mass rocket stoves
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Rammed
Rocket Stove
Low Thermal mass rocket stoves
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High Thermal mass charcoal stoves
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Charcoal Rocket
Stoves
Rammed
rocket
stove
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Charcoal
Rocket Stove
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Charcoal
Rocket Stove
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Cast iron
cooking
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Greenhouse extension
by kitchen
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Orchard
Raised
beds
Herb spiral
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Herb spiral
Rosal
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Herb spiral
w/azolla pond
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Leopold
bench
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Proven Design
Conservation bat house
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Documented cost for
Earth House 3
The Nebraska House
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Materials and paid labor in USD
Documented cost for
Earth House Three
The Nebraska House
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Natural Living
Score card- critical and financial considerations
Material sources: on site bamboo and
hardwoods_
On-site – labor cost
Local – delivery cost
Trucked – delivery cost
Plinth height __30 cm_____
Plinth width____20 cm___
Lintel height 260 cm
Window
Tie beam
Wall thickness width____________
Wall height ___240 cm_____
Structural support
Wall only h:w _12:1______
Columns h:w _____________
Material
Clay 40%
Sand
Lignin –rice hull
Stabilizer
Finish
Plaster
Painted clay -Albuminate
Raw
Roof material___thatch –nipa palm____
Roof overhang __120 cm__
Roof overhang ratio RO:WH _2:1___
Roof slope __40 deg._____
x
xx
x
x
x
x
x
x
x
xxxx
x
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The Nebraska
House