sustainable building: earth 1
TRANSCRIPT
Sustainable Building:EARTH Part 1
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 acres13 rai
31 dou
7 hectares17 acres
43 rai108 dou
Earth as a building material comes in a thousand different compositions, and can be variously processed. Loam, or clayey soil, as it is referred to scientifically, has different names when used in various applications, for instance rammed earth, soil blocks, mud bricks or adobe.
Mushroom Culture House
Bench
EH 3
The Nebraska House
Tool shed
Retaining walls
EH 2
Charcoal kilns
EH 1
Cow shed
Macarascas, PalawanSoil Audit: 40% clay
clay
silt
sand
In late 2013, the International Code Council (ICC) approved two new appendixes: one for straw bale construction (Appendix S) and one for light straw-clay construction (Appendix R). These appendixes are included in the 2015 Residential Code for one- and two-family dwellings.
http://codes.iccsafe.org/app/book/content/2015-I-Codes/2015%20IRC%20HTML/Appendix%20S.html
Aloha Ranch
Loam has three disadvantages when compared to common industrialized building materials:
1. Loam is not a standardized building material
2. Loam mixtures shrink when drying
3. Loam is not water-resistant
Loam has many advantages in comparison to common industrial building materials:
1. Loam balances air humidity
2. Loam stores heat (or cold)
3. Loam saves energy and reduces environ- mental pollution
4. Loam is always reusable
5. Loam saves material and transportation costs
6. Loam is ideal for do-it-yourself construction
7. Loam preserves timber and other organic materials
8. Loam absorbs pollutants
Neil and Su have so many projects going on right now. Neil calls it "project creep," where you start something small and end up with something unmanageable. They bought their house a few years ago and are doing massive renovations.
Kyle Holzhueter
Rammed earthen floorEH 3
Rammed earthen floorEH 3
TroweledOiled Waxed
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.
Gernot Minke
Building with EarthDesign and Technology of a Sustainable Architecture
https://ia700503.us.archive.org/11/items/Gernot_Minke-Building_With_Earth/Gernot_Minke-Building_With_Earth.pdf
Gernot Minke
Building with EarthDesign and Technology of a Sustainable Architecture
Earth TermsLoam as it is referred to scientifically, (clayey soil) has different names when used in various applications, for instance rammed earth, soil blocks, mud bricks or adobe.
Macarascas, PalawanSoil Audit: 40% clay
clay
silt
sand
Earth Terms
AdobeBlocks of earth (loam)
produced manually by throwing wet earth into a formwork are called adobes or mud bricks or sun- dried earth blocks. Also can be used to plaster or Wattle and daub
Thai earthen homes
Cob: Chopped straw and earth
“The word cob comes from an old English root meaning a lump or rounded mass. Cob building uses hands and feet to form lumps of earth mixed with sand and straw.”
Cob: Chopped straw and earth
Wattle and daub
Earth Terms
Soil Blocks are compressed
unbaked bricks
Gernot Minke
Building with EarthDesign and Technology of a Sustainable Architecture
https://ia700503.us.archive.org/11/items/Gernot_Minke-Building_With_Earth/Gernot_Minke-Building_With_Earth.pdf
Earth Terms
Stabilized Soil Blocks
are compressed unbaked bricks
w/ Portland etc.
Soil blocks
Compressed stabilized soil blocksSand, Portland and limestone
Compressed stabilized soil blocksSand, Portland and limestone
Compressed stabilized soil blocksSand, Portland and limestone
Compressed stabilized soil blocksSand, Portland and limestone
Compressed stabilized soil blocksSand, Portland and limestone
Earth Terms
Stabilized Rammed Soil Blocks
are compressed unbaked bricks that use a stabilizer (hydrated lime, Portland etc.)
Rammed Earth in the UK
Pneumatic Compaction
Rammed Earth
S.I.R.E. Stabilized Insulated Rammed Earth
Earth Terms
Stabilized Rammed Earth Wallsare compressed walls that use loam
and a stabilizer (hydrated lime, Portland etc.)
The French call rammed earth construction
pisé de terre.
High labor costsMultiple handling of materialsHigh material costsTrucked into site from quarryHigh embedded energyCarbon intensive productionHigh heat gainHigh U value
Rammed Earth Vs. Hollow block
Lower labor costsEfficient use of materialsLower material costsLocal materials, on siteLow embedded energyStores more carbon than producedNo solar gainHigh R value
High labor costsMultiple handling of materialsFoot mixingMaterial is blended manuallyAdvanced lead timeBricks must be cured and load bearingAdditional grout required for building
Rammed Earth Vs. Adobe Brick
Lower labor costsEfficient use of materialsSingle handlingMixer is usedNo lead time for curingForms are moved immediatelyStronger/longer lastingMonolithic pour
The laundry list of volatile chemicals used in tires is alarming: · Benzene inhalation causes cancer· Toluene inhalation causes cognitive disfunction· Arsenic inhalation causes organ failure· Acetone inhalation causes irritation of the throat and lung
plus heavy metals that include· Nickel inhalation causes sinusitis and cancer· Copper inhalation causes nausea and suppressed liver function· Cadmium inhalation causes kidney disease and an increased frequency of kidney stone formation
Organic compounds in tires break down more quickly than the vulcanized rubber. Criteria which determine breakdown rate include: heating, friction (from movement), water trapping and freezing, and evaporation of plasticizers.
STABILIZED RAMMED EARTH
A lightweight husk loam for Rural HousingWith a high Insulative rating for tropical conditions
Aloha Ranch
Earth Terms Rammed Earth walls - compacted within a formwork
1 Binder
2 clay soil
3 Ricehull
5-10 liters water
Australia has the potential to produce over a million tons of rice annually, and our rice farmers have shown themselves to be very efficient in its cultivation, using 50 per cent less water for the crop than the global average. Rice needs to be hulled to remove the outer husk from the eatable inner grain. The waste generated in the process is significant - it has been calculated that in excess of 100,000,000 metric tons of rice hulls are created globally.
These little shells, which make up approximately 20 per cent of the weight of harvested rice, have shown themselves to have rather remarkable properties. They are considered to be naturally flame retardant, requiring no chemical additives to provide their self extinguishing characteristics, partly due to their high silica content. They resist the growth of fungi and mould. In the USA, rice husks have been classified as Class A insulation material for their high thermal resistance value.
Binder - termite barrier10 liters CRH/RHA10 liters agri lime stone20 liters Portland cement
Excavated on site clay soilLocal Rice hull
Carbonized Rice hull
/ASH
Stabilized Rammed Earth wall materials
Light weight loam<600 kg/m3
Hybrid Earthen HomesSoil Audit: 40% clay
EH 3
clay
silt
sand
Excavated clay soilLocal Rice hull
Light weight loam<600 kg/m3
RHA:Rice Hull
ASH
Spanish barro apisonado or tapial
German Stampflehmbau
French terre pisé
Rammed Earth
Moist soil is poured into formwork in layers up to 15 cm thick and then compacted by ramming
Loam is a mixture of clay, silt and sand, and sometimes contains larger aggregates like gravel and stones.
A solid wall of rammed earth without straw or other light aggregates has nearly the same insulating effect as a solid wall of baked bricks.
A solid wall of rammed earth without straw or other light aggregates has nearly the same insulating effect as a solid wall of baked bricks.
The lighter the material, the higher its thermal insulation.
The greater its humidity level, the lower its insulating effect.
In comparison with wet loam techniques (see chapter 9), the shrinkage ratio of rammed earth is much lower, and strength much higher.
In comparison with adobe masonry (see chapter 6), rammed earth – since it is monolithic – provides the advantage of longer life.
Earth, when used as a building material, is often given different names. Referred to in scientific terms as loam, it is a mixture of clay, silt (very fine sand), sand, and occasionally larger aggregates such as gravel or stones.
When speaking of handmade unbaked bricks, the terms ”mud bricks” or “adobes” are usually employed for earth; when speaking of compressed unbaked bricks, the term ”soil blocks” is used. When compacted within a formwork, it is called ”rammed earth”.
Rammed cow shed with ends protected by wood
Is this wall Finished?How?
Rammed earth?Is this wall Structural?
Stabilized Rammed Earth
Stabilized Rammed Earth
Mixing stabilized lightweight loam
Rammed stabilized lightweight loam wall
Rammed Earth
Next Hybrid Earthen Home Building Course January 2015 Aloha Ranch
Earthquake and typhoon resistant Homes
Rammed Earth
Hybrid Earthen Home Building Course November 2014 Aloha Ranch
Rammed Earth
Hybrid Earthen Home Building Course November 2014 Aloha Ranch
Rammed Earth
Mushroom Culture House
Rammed Earth
Mushroom Culture House
Rammed Earth
Mushroom Culture House
Rammed Earth
Mushroom Culture House
Rammed Earth
Mushroom Culture House
Rammed Earth
Mushroom Culture House
Rammed Earth
Mushroom Culture House
Rammed Earth
Mushroom Culture House
Rammed Earth
Mushroom Culture House
Rammed Earth
Mushroom Culture House
Rammed Earth
Mushroom Culture House
STABILIZED RAMMED EARTH
A lightweight husk loam for Aloha Ranch
High R value insulation[Low U value]
R value measures thermal resistance
Stabilized lightweight loam
Mushroom Culture House
Bench
EH 3
The Nebraska House
Tool shed
Retaining walls
EH 2
Charcoal kilns
EH 1
In late 2013, the International Code Council (ICC) approved two new appendixes: one for straw bale construction (Appendix S) and one for light straw-clay construction (Appendix R). These appendixes are included in the 2015 Residential Code for one- and two-family dwellings.
http://codes.iccsafe.org/app/book/content/2015-I-Codes/2015%20IRC%20HTML/Appendix%20S.html
Mixing stabilized lightweight loam
Rammed stabilized lightweight loam wall
Cob: Chopped straw and earth
Cob: Chopped straw and earth
Cob: Chopped straw and earth
Cob: Chopped straw and earth
Cob: Chopped straw and earth
Wattle and daub
The anxiety that mice or insects might live in earth
walls is unfounded when these are solid. Insects can
survive only provided there are gaps, as in “wattle-and-
daub” walls. In South America, the Chagas disease,
which leads to blindness, comes from insects that
live in wattle-and-daub walls. Gaps can be avoided
by constructing walls of rammed earth or mud
bricks with totally filled mud mortar joints.
Moreover, if the earth contains too many organic
additives, as in the case of lightweight straw clay, with
a density of less than 600 kg/m3, small insects such as
wood lice can live in the straw and attack it. Common
perceptions that loam surfaces are difficult to clean
(especially in kitchens and bathrooms) can be dealt
with by painting them with casein/lime, linseed oil or
other coatings, which makes them non- abrasive. As
explained on p. 132, bathrooms with earth walls are
more hygienic than those with glazed tiles, since earth
absorbs high humidity quickly, thereby inhibiting fungus
growth.
Gernot Minke Building with EarthPg 16
The anxiety that mice or insects might live in earth walls
is unfounded when these are solid. Insects can survive
only provided there are gaps, as in “wattle-and-daub”
walls. In South America, the Chagas disease, which
leads to blindness, comes from insects that live in
wattle-and-daub walls. Gaps can be avoided by
constructing walls of rammed earth or mud bricks
with totally filled mud mortar joints.
Gernot Minke Building with EarthPg 16
Martin Shkreli, the hedge-fund manager who became notorious for buying the rights to critical anti-parasite drugs used to treat HIV/AIDS patients and then jacking up the price by 5000% (from $13.50 to $750!) has found himself himself arrested by federal authorities for securities fraud. He recently acquired KaloBios Pharmaceuticals and is planning to raise the price of courses of benznidazole, used to treat a disease in Latin America known as “Chagas,” from $100 to $100,000
Sicsican mud house
Marcus SwanepoleWattle and daub
Sicsican mud house
Wattle and daub
Sicsican mud house
Wattle and daub
Sicsican mud house
Wattle and daub
Sicsican mud house
Wattle and daub
Sicsican mud house
Wattle and daub
Sicsican mud house
Wattle and daub
Sicsican mud house
Wattle and daub
Sicsican mud house
Wattle and daub
Sicsican mud house
Wattle and daub
Sicsican mud house
Wattle and daub
Evaluating Earthen Structures
Wattle and daub
Score card Material sources Plinth height Structural support Wall thickness Material Finish Roof overhang Roof slope
Stacked shuttering
U-shaped wall in greenhouse Stabilized Rammed Earth walls
Hybrid Earthen Homes
U-shaped wall in greenhouseRing beam next
U-shaped wall in greenhouse
U-shaped wall in greenhouse
Formwork slides up forSecond layer on First layer
Hybrid Earthen Homes
7m
5.2m
2.4m
2.7m
h = (√3)s 4.6m
d = 2s 5.2m
a = (1.5√3)s² 19m2
206 sq ft.p = 6s
Similarly,
s = h/(√3)
d = 2h/(√3)
19m2
Hybrid Earthen Homes
Master pattern
6 Columns
1 meter floor extention
20cm
86 cm
Hybrid Earthen Homes
Master pattern
Column detailColumn strap detail
30cm
3 strapsBelow floor
Dowels connectBelow floor
Hybrid Earthen Homes
Marking footings
Hybrid Earthen Homes
One man bagging with tubular bag holder
Two men bagging with human bag holder
Hybrid Earthen Homes
Ready for footings
Hybrid Earthen Homes
Holes 80cm x 80cm x 25cm
steel 80cm x 80cm x 10mm
Hybrid Earthen Homes
Digging footings Bagging excavated loam
for rammed earth wall
One man bagging with tubular bag holder
Plinth
Footing
Column
Flooring 25cmdeep
80cm
40cm
30cm
Hybrid Earthen Homes
Foundation detail
EH 1
Hybrid Earthen Homes
Footing pad, dowels and column ready
Footing hole 80cm x 80cm x 25cm
8mm 70cm x 70cm steel bar
Hybrid Earthen Homes
Footing pad poured and plinth next, column ready
Plinth w/concrete, steel and rock infill
Hybrid Earthen Homes
Column form detail
20cm
30cm
Steel strap Wood form with key
30cm
40cm
2”x4” key
Finished columnReady for ramming
Hybrid Earthen Homes
Column form detailWood form with key
2”x4” dovetail key
Wing nut
Hybrid Earthen Homes
Column form detail
Column and rammed wall locked with key
First layer on plinth
First layer on plinth
Slotted angle bar guides
Column key
First layer on plinth
Slotted angle bar guides
Column key
First layer on plinth
Slotted angle bar guidesFormwork slides up forSecond layer on First layer
Formwork slides up forSecond layer on First layer
Hybrid Earthen Homes
Hybrid Earthen Homes
Hybrid Earthen Homes
Improved formworkw/backsplash
Stacked shuttering
Stacked shuttering
Movable Plywood form
Hybrid Earthen Homes
Must roof after final ram
Hybrid Earthen Homes
Rainy season may require temporary roof
Hybrid Earthen Homes
Hybrid Earthen Homes
Hybrid Earthen Homes
The Miller Bench
Hybrid Earthen Homes
Hybrid Earthen Homeand
Aquaponic Greenhouse
Hybrid Earthen Homes
WindowMold
Jalousiewindow
Lentil / tie beam considerations
Lentil / tie beam considerations
Hybrid Earthen Homes
WindowMold
Lentil / tie beam considerations
Hybrid Earthen Homes
WindowMold
Lentil / tie beam considerations
Hybrid Earthen Homes
WindowMold
Lentil / tie beam considerations
Hybrid Earthen Homes
WindowMold
Lentil / tie beam considerations
Hybrid Earthen Homes
WindowMold
Removed
Lentil / tie beam considerations
Hybrid Earthen Homes
WindowMold
Removed
Lentil / tie beam considerations
Hybrid Earthen Homes
WindowMold
Removed
Lentil / tie beam considerations
Hybrid Earthen Homes
Sitting window
Hybrid Earthen Homes
1/2 height 14cm thick wall6 mixers rammed lightweight loam
Lentil / tie beam considerations
Finishing OptionsRaw
PlasterClays
Binders
Interior wall
1 lime3 fine sand½ clay
Stay within a pallet range you like
Finishing OptionsRaw
PlasterClays
Binders
Finishing OptionsRaw
PlasterClays
Binders
Raw poured earth
Finishing OptionsRaw
PlasterClays
Binders
Finishing OptionsRaw
PlasterClays
Binders
AlbuminateFinishing Options
RawPlasterClays
Binders
Sustainable Building:EARTH
Hybrid Earthen Homes
Breathable Plaster Primer1 part whey and 1 part hydrated lime
Mix 2 minutes then stand 5 minutes then add 2 parts water
Lime, together with casein, forms a chemical waterproofing agent called calcium ALBUMINATE.
Hybrid Earthen Homes
Plaster Preparation
Whey, hydraulic lime and sand The
lime has to be first intensively mixed into
the whey to form a creamy paste without
adding any water. After allowing the mix
to rest for a while, water and sand should
be added.
For a thinner plaster that can be brushed
on, with the proportion 1:6:25
In warm climates, some kitchen salt
should be added to keep the lime plaster
moist for a longer period, which improves
curing.
Water Proof Breathable Colored Plaster1 part whey to 1 part hydrated lime
Machine Mix 2 minutes then stand 5 minutesthen add 1 part clay for color, 3 parts sand for texture and 4 parts hydrated lime
Machine MixSet drill press to Lowest speed with 5 ½ ” boat prop1 part whey to 1 part hydrated limeMachine Mix 2 minutes then stand 5 minutes
Hybrid Earthen Homes
Water Proof Breathable Colored Plaster1 part whey to 1 part hydrated lime
Machine Mix 2 minutes then stand 5 minutesthen add 1 part clay for color, 3 parts sand for texture and 4 parts hydrated lime
Full height 14cm thick wall
12 mixers rammed lightweight loam
Whey/ lime primer
½ height 14cm thick wall
6 mixers rammed lightweight loam
Whey/ lime clay and sand finish
Coat 1
Building 1
Building 1
Building 1
Building 1
Building 1
Round columns
Building 1Hybrid
Earthen Homes
Building 1Hybrid
Earthen Homes
Building 1Hybrid
Earthen Homes
Building 1Hybrid
Earthen Homes
Building 1Hybrid
Earthen Homes
Aloha Ranch
ALOHA RANCHand
ORGANIC FARMMacarascas