--- In papercreters@yahoogroups.com, "gmkdart" <gkrautha@...> wrote:
>
> However, I am concerned about flammability-- it seems the general
> rule is a 4:1 mix of portland cement to paper. My question is, are
> these dry weights?
I would look at your source for the 4:1 ratio to answer that question.
Everyone on the list has slightly different mixes they use in
different situations. I don't need mine to be fireproof at the moment,
but I need it to stand up to weather. So I use about 3:1 wet pulp to
dry portland by volume. For fireproofing, I would probably be inclined
to up the inerts by adding lime, portland or sand.
- Ernie
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