--- In papercreters@yahoogroups.com, "John Annesley" <John@...>
wrote:
>
> Nick,
> Asphalt Emulsion isn't a hydrocarbon, nor does it contain any of
> those.
False.
"Asphalt itself is a hydrocarbon mixture that is heated until it has
the consistency of tar."
http://www.wisegeek.com/how-is-asphalt-made.htm
> There are asphalt lakes in various parts of the world which occur
> naturally.
True.
Here is a study of some. However, you will note that they specify
they are hydrocarbons. Bitumen = Asphalt (asphalt is the common name
in the US, bitumen out side of the US).
http://www.ags.gov.ab.ca/publications/ABSTRACTS/GEO_2002_01.html
> Asphalt whether its a derivative of the petroleum industry or a
> naturally occurring deposit, is non-toxic.
All depends on your defintion of toxic. About 12 states say it is,
the rest don't think so.
<snip>
Lastly, there is an interesting discussion on the wiki
(http://en.wikipedia.org/wiki/Asphalt) about using vegetable oil
derivatives for the same purpose. Personally I would find these
easier to justify using than a by-product of the petroleum industry.
- Ernie
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