--- In papercreters@yahoogroups.com, Stone Tool <owly@...> wrote:
>
> Ernie:
> The first of those links contains a VERY IMPORTANT statement
> and one worth serious consideration where PC is concerned:
>
> "All lignocellulosic substrates have detrimental effects on cement
> setting, which is mostly seen by a delay in attaining the maximum
> temperature in the process. However, the addition of calcium
> chloride was able to overcome this disadvantage."
Calcium chloride is interesting stuff. Used in all kinds of things.
Candy, waste water treatment, DNA introduction, bottled water, etc.
It may even be created during the PC process, if lime is present. We
don't really know as no one has documented that process yet.
> ..... there was lots of good stuff in those links...... of
> particular interest was the fact that highest strengths are
> achieved by rapid temperature build up during hydration, and that
> those chemicals that promoted this were of significant benefit....
Finding it has always been easy for me. Finding the time to read it
all, figure out what they were trying to say, make sense of what it
meant to me, and then test it all out I can never make the time for...
> Diethnolamine being described as one of the best........
Erm. DEA is hygroscopic like calcium chloride, but lots more
dangerous. Not something I would want around in anything close to
pure form if I could avoid it.
> Rapid thermal gain and fast setting would make a system such as the
> dry cellulose blown through a spray of accelerated cement....into a
> very practical and versatile system. A liquid cement "slurry"
> sprayed on ground cellulose with an accelerant added to the liquid
> stream at a suitable distance before the nozzle could be very
> effective. DEA is common, and is worth looking into. We should
> all have some carcinogens in our homes ;-)
See above for the carcinogens. heh.
As to your other idea, it may be a great system for someone in a
commercial outfit. As for me, I don't think it would be achievable
with stuff I can manage to keep around in my just outside the city
limits yard. =)
- E
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