Re: SB: Re: SB and a Better Mouse Trap

["John Swearingen" <john@skillful-means.com>]

Don't forget the logistics of recycling--a steel roof comes off easily, but
the wire in a layer of stucco is very difficult to extract.

John

----- Original Message -----
From: "John Kingsley" <johnk@magma.ca>
To: <unlisted-recipients:>; <no To-header on input>
Cc: <strawbale@crest.org>
Sent: Sunday, March 24, 2002 1:43 PM
Subject: Re: SB: Re: SB and a Better Mouse Trap


> Hi All,
>
> Huff 'n' Puff Constructions wrote:
> [snip]
> > How sustainable is recycling steel?
>
> While everyone is firing up their flame-throwers....
>
> ...I thought I'd just add some data to to pot ...
>
> Here is the embodied energy for a few materials (MJ/kg):
>   Steel virgin: 32.0
>   Steel recycled: 10.1
>   Portland cement: 7.8
>   Concrete, ready mix (30 MPa = 4300 PSI): 1.3
>   Adobe, cement stablized: 0.42
>   Adobe, bitumen stablized: 0.29
>   Straw, baled: 0.24
>
> I got this is from:
>
> http://www.arch.vuw.ac.nz/cbpr/embodied_energy/files/ee-coefficients.pdf
>
> Yes, I know this isn't the whole story with respect to
> the environment and producing/recycling steel.
>
> And no, ... I'm not going to draw any conclusions from
> this data...
>
> Just thought I'd put this out before I run to get
> my flame resistent toque.
>
> Yow! ... ouch..... it's getting hot in here.
> Us Canadians aint use to this heat.
>
> cheers,
> John
>
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