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Download the latest technical report

Estimated Contained Earth Shear Strengths May 2017-

                                                                             16 pages, 1.7 MB

                                                                             Full test description coming soon 


Structural Information for Earthbag/ Contained Earth is online!

Check out university research and recent BSI test results that can help you build safer for high risk areas.

Get involved and let BSI advise your student researchers to fill in some of the gaps in our knowledge. let's build geo-textile earthen buildings that whup the next quake. 


Hundreds of earthbag/ CE buildings have been built in Nepal since 2015!

Current research shows how different contained earth is from sandbag wall research that engineers have used to design Nepal's CE buildings.

And it also shows us that a single length of vertical rebar is 50% stronger than two separate pieces hammered in the wall. Base-anchored rebar should be embedded in earthen wall fill for best strength. Careful detailing makes these walls not only survive quakes, but survive without breaking all the windows...

White Paper Introducing Earthbag/ Contained Earth

Earth Walls Defying Earthquakes summarizes what contained earth is, what it isn't and the structural data we now have. Best intro for leaders about the potential for quake-resilient sustainable walls that don't cost much.


Cisterns for Haiti

BSI has been consulting with engineering students at Harding University about cistern designs for dry northern Haiti. Recent droughts and the everpresent cholera in the groundwater make saving rainwater important. BSI hopes to test some narrow wall solid contained earth (think 8" thick in strong mesh tubes) and/ or some double channel mixed sand/ earth fill for 5' high cistern walls.

Right: Straw wattle reinforced with rebar on a 1.2 m high earthbag base wall.

Come Learn while you Volunteer!

There are intense needs for local Albuquerque and Santa Fe students and adults to help by building, testing, organizing volunteers, analysizing structures, photography, video, blogging...

Become a BSI hero!


Answers Needed for Nepal: Tilt tests, shake tests, cyclic-dynamic!

Now that Nepal's quake gave us positive results, it's time to see just how much earthbag can stand in vibration!
Dartmouth engineering student Awais Malik's testing showed that 2 narrow corner buttresses or one massive corner pier reduce  earthbag wall deflection under vibration by 25% and 33% respectively. More information is online in his thesis, Structural Analysis of Earth-Bag Systems.

A New Zealand engineer recommends we do a tilt test, using a backhoe to lean a wall portion over.
Even a modest shake table test of a stacks of solid mesh earthbags and modular contained earth in bags can tell us a lot!
 

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