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permaculture - Re: [permaculture] Cinder Block = Fly Ash?

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  • From: venaurafarm <venaurafarm@bellsouth.net>
  • To: permaculture <permaculture@lists.ibiblio.org>
  • Subject: Re: [permaculture] Cinder Block = Fly Ash?
  • Date: Sat, 30 Mar 2013 21:26:06 -0400

On 3/30/2013 7:52 PM, ChildrensPeaceGuild wrote:
A friend came across some cheap cinder block and wanted to make a raised bed,
but had read they contain fly ash.
Does anyone have recommendations/experience regarding this?

Call the concrete products companies that produce these things and they will tell you what goes into them. I have heard that fly ash has been used for years. So, what toxic residues are in it? Possibilities:
mercury
cadmium
cobalt
lead
?
?
?






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