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urbanite(with steel) for cob house foundation  RSS feed

 
Posts: 5
Location: Central Maryland 6b
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any idea why Ianto says use concrete chunks WITHOUT steel reinforcement? is it bad or just more difficult to work with?
 
Posts: 3364
Location: Kansas Zone 6a
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It can be a PITA to work with, but the exposed steel will wick water, rust, and destroy the concrete. Any rebar/mesh needs to be covered by concrete.
 
gardener
Posts: 7139
Location: Victoria British Columbia-Canada
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Often, when concrete is pulverized by a hoe ram (giant excavator mounted jackhammer) large quantities of rebar are produced. This stuff is of low value since it takes quite a bit of machine time and bin space when shipping it off to the scrap yard where it seldom brings in enough revenue to justify that cost. I have gained permission to glean this stuff during lunch breaks and after hours. On jobs of my own, there have been instances where I had no need for rebar, so I allowed others to gather it. Time and money were saved and a resource was reused which is far better than recycled.

If you live in a city, head downtown in the morning and listen for the ratta tat of a hoe ram. It's about 100 times louder than a woodpecker. Or, you could call an excavating company to see where they are working with one. Show up with a hard hat, boots and an orange vest. Don't work near heavy equipment, even if they say it's safe. Plenty of concrete and rock available at these sites as well. Smaller sites with only one contractor are much easier to gain access to.
 
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