Darcey`s slide presentation - 2012 International Straw Builder`s

PAKSBAB - Pakistan Straw Bale and Appropriate Building
A project of Builders Without Borders
Surkhab Khan, C.O.O.
Darcey Donovan, P.E., C.T.O.
www.paksbab.org
Kashmir Earthquake Oct. 8, 2005
• Mw = 7.6
• 86,000 lives lost
• 100,000 seriously injured
• 3,500,000 people homeless
• 780,000 buildings destroyed
How it all started (simplified version):
Darcey volunteers to help advise a straw bale pilot project with Dosti
Welfare Organization in northern Pakistan
Surkhab is Assistant Program Officer and facilitates project
PAKSBAB’s mission:
To apply straw bale and other appropriate building solutions to
protect and improve the lives of the poor, especially in seismic and
severe temperature regions of the developing world.
What makes PAKSBAB’s straw bale
system unique?
• Earthquake resistant AND affordable
• Simple load bearing design
Straw bales are made with locally fabricated compression
moulds and manually operated farm jacks
Foundation construction with fishing net for seismic reinforcement.
Tops and sides of rock foundation are plastered with soil cement.
Straw bales are placed in a running bond with bamboo pins for
out-of-plane support. Trusses are connected to top plates.
Ceiling is insulated with light straw clay. Slip is applied to walls, then
base plaster coat. Fishing net is spread and attached to framing.
Second and final plaster coats are applied
and finished with clay paint or lime wash
Jabori Women’s Community
Center, 2006
Hillkot Residence, 2006-2007
One-room 3-house project,
Mansehra & Shinkiari, 2007
Community Development Program
Gul Khan / Ghoria Bibi
Qalandarabad, 2008
Bach Christian Hospital
Employee Housing, 2009
Wheelchair accessible homes
for SCIPPER patients, 2011-12
Engineers Without Borders Denmark
10-House Project, 2012
PAKSBAB Seismic Research Project
2008-2009
A NEES Shared Use Project
@ the University of Nevada, Reno
Sponsored by the Earthquake Engineering
Research Institute (EERI)
• In-plane cyclic tests of 4 straw bale wall assemblies
• 8 shake table tests of full scale 14’x14’x 10’ house
Straw bale wall specimen construction
In-plane cyclic test
4 foot wall with light detailing (no reinforcement)
In-Plane Cyclic Test Protocol
In-plane cyclic test
4 foot wall with medium detailing (#9 fishing net reinforcement)
In-plane cyclic test
4 foot wall with heavy detailing (#12 fishing net reinforcement)
In-plane cyclic test
8 foot wall with heavy detailing (#12 fishing net reinforcement)
PAKSBAB Wall Test 2
PAKSBAB Wall Test 1
800
600
Lateral Wall Capacity (lbs)
Lateral Wall Capacity (lbs)
600
400
200
0
-200
-400
400
200
0
-200
-400
-600
-800
-600
-4
-3
-2
-1
0
1
2
3
-10
4
-8
-6
-4
-2
0
2
4
6
Lateral Wall Displacement (inches)
Lateral Wall Displacement (inches)
Wall Test 3 Load vs. Displacement
Wall Test 4 Load vs. Displacement
800
2500
600
2000
1500
400
1000
200
-10
-8
-6
-4
-2
0
-200
2
4
6
Load (lb)
Load (lb)
500
0
0
-6
-4
-2
0
-500
-400
-1000
-600
-800
-1000
Displacement (in.)
-1500
-2000
-2500
Displacement (in.)
2
4
6
Straw bale house construction on portable platform /
lifting onto shake table
House survived 8 increasing levels of earthquakes / 0.8g acceleration larger than 0.3-0.6g estimates of the Kashmir Earthquake
To view a video of PAKSBAB’s shake table tests http://nees.unr.edu/projects/straw_bale_house.html
What’s next:
• Global Social Benefit Incubator at Santa
Clara University / Jawad Aslam, C.E.O.
Ansaar Management Company
• Bari Imam Accessible Group Home
• Rural Permaculture Pilot Project
• Low-income Housing Development Pilot
Project
Thoughts:
• Organization/company building and SB
building co-emphasis
• Systems (permaculture) approach
• Non-profit versus for-profit social enterprise
• Microfinance mortgages need to be
investigated
• Carbon project certification / offsets subsidize
micro-income clients
Providing appropriate building solutions
for people, planet and peace
www.paksbab.org