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- From: Kakerby <kakerby AT aol.com>
- To: market-farming AT lists.ibiblio.org
- Subject: Re: [Market-farming] Is Crushed Concrete Toxic?
- Date: Fri, 19 Apr 2013 16:29:29 -0400 (EDT)
Laurie, you may need to go directly to the source for the crushed concrete, since formulations and previous use will affect that answer. But here's a MSDS (material safety data sheet) that I found from one particular company making crushed concrete:
In their flyer, it's considered toxic because it has silica particulates, which can irritate and inflame breathing passages.
A document such as this should be available from the company providing the crushed concrete product. If it's not, I would ask if they have something comparable (although the MSDS is the standard document for such questions, so they should have it). They may also say, as this one does, that each individual batch will have slightly different properties, either due to how it was mixed, or where it was used. If you can work with whoever is supplying it, they might be able to test just that batch. But that might also be more hassle than they or you want to work with. Let us know if you get that far, and what the results are.
Kathryn Kerby
frogchorusfarm.com
Snohomish, WA
-----Original Message-----
From: Mike Brabo <mdbrabo AT att.net>
To: Market Farming <market-farming AT lists.ibiblio.org>
Sent: Fri, Apr 19, 2013 12:43 pm
Subject: Re: [Market-farming] Is Crushed Concrete Toxic?
From: Mike Brabo <mdbrabo AT att.net>
To: Market Farming <market-farming AT lists.ibiblio.org>
Sent: Fri, Apr 19, 2013 12:43 pm
Subject: Re: [Market-farming] Is Crushed Concrete Toxic?
Hi Laurie, It encourages me to see you doing your homework. Too often I've seen people do things that are quite costly or impossible to undo. Since concrete is porous there is the possibility that it may contain various fuels, lubricants and VOCs, especially if the concrete came from a road project. Thankfully in our area there are many limestone quarries and we're able to get clean, washed limestone to build roads or wash areas. Regards, Mike Vesterbrook Farm Certified Naturally Grown Clarksville, Missouri - Mississippi River Bluffs, Zone 5b-6a On Apr 19, 2013, at 2:37 PM, Barking Cat Farm wrote: > My apologies in advance for what may be a silly question. I've spent a lot of time looking into this and cannot seem to get consistent answers, so I decided to ping The Collective. > > Does crushed concrete contain toxic materials (either natural or synthetic) that could potentially leach out into the surrounding ground? We are looking at recycled crushed concrete as a potential road building material. I've heard from various sources that it can be toxic. For instance, I've been told that if you throw crushed concrete in a pond, it will kill fish, toads, frogs, etc. What I cannot seem to find is a definitive confirmation of concrete's toxicity (or lack thereof) from a reputable source. > > If it does contain harmful toxins that could leach out, we will have to look at another road bed material, as we cannot take a chance on toxins leaching into any of the crop areas or surrounding healthy soil. > > Your help is appreciated. I'd like to see documented proof one way or another, if you have links. I've been online researching .edu sites, and have learned more than I really wanted to know about cement, but more from a chemistry standpoint. Unfortunately, chemistry is not my strong suit. > > Laurie > Barking Cat Farm > _______________________________________________ > Market-farming mailing list > Market-farming AT lists.ibiblio.org > http://lists.ibiblio.org/mailman/listinfo/market-farming > > Market Farming List Archives may be found here: > https://lists.ibiblio.org/sympa/arc/market-farming/ > Unsubscribe from the list here (you will need to login in with your email > address and password): > http://lists.ibiblio.org/mailman/options/market-farming _______________________________________________ Market-farming mailing list Market-farming AT lists.ibiblio.org http://lists.ibiblio.org/mailman/listinfo/market-farming Market Farming List Archives may be found here: https://lists.ibiblio.org/sympa/arc/market-farming/ Unsubscribe from the list here (you will need to login in with your email address and password): http://lists.ibiblio.org/mailman/options/market-farming
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[Market-farming] Is Crushed Concrete Toxic?,
Barking Cat Farm, 04/19/2013
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Re: [Market-farming] Is Crushed Concrete Toxic?,
Mike Brabo, 04/19/2013
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Re: [Market-farming] Is Crushed Concrete Toxic?,
Kakerby, 04/19/2013
- Re: [Market-farming] Is Crushed Concrete Toxic?, Barking Cat Farm, 04/19/2013
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Re: [Market-farming] Is Crushed Concrete Toxic?,
Barking Cat Farm, 04/19/2013
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Re: [Market-farming] Is Crushed Concrete Toxic?,
Mike Brabo, 04/19/2013
- Re: [Market-farming] Is Crushed Concrete Toxic?, Shoemaker, William H, 04/19/2013
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Re: [Market-farming] Is Crushed Concrete Toxic?,
Mike Brabo, 04/19/2013
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Re: [Market-farming] Is Crushed Concrete Toxic?,
Kakerby, 04/19/2013
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Re: [Market-farming] Is Crushed Concrete Toxic?,
Richard Stewart, 04/20/2013
- Re: [Market-farming] Is Crushed Concrete Toxic?, Shoemaker, William H, 04/20/2013
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Re: [Market-farming] Is Crushed Concrete Toxic?,
Mike Brabo, 04/19/2013
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