--- In papercreters@yahoogroups.com, "sheelakasha"
<levecosolutions@...> wrote:
>
> hello all.
> has anyone measured the ratio between compression and insulation?
> in other words, the more i compress my PC block, the less air is left
> in it, hence less R-Value. IS THIS ASSUMPTION CORRECT?
> is there a formula of compression strength to R-Value.
> thoughts?
I don't have a forumla for you, but I would not make that assumption.
Anecdotal evidence suggests the opposite is actually true, at least as
far compressed as folks have taken it (Cinva press / ram). If you got
into extremes with a hydraulic press I am not sure the same would hold
true, or if it does there is a point of diminishing returns that would
have to be calculated into any formula.
Anecdotal evidence also suggests that compression increases strength,
and that foaming agents either have not effect or a negative effect on
strength and R values. My experience has been that those areas I hand
tamp to compress hold up better than those I don't.
- Ernie
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