YeI believe it is the same. The only difference I see is that the texture will be more coarse (larger) but that is irrelevant in floor construction. Pumice and perlite are both volcanic glasses.
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To: papercreters@yahoogroups.com
From: thelandyacht@hotmail.com
Date: Sun, 2 May 2010 03:09:53 +0000
Subject: [papercreters] Re: Source for pumice
Scoria...have the same characteristics as pumice? color is irrelevant to me
--- In papercreters@yahoogroups.com , JUDITH WILLIAMS <williams_judith@...> wrote:
>
>
> I am still pumice-less here in NM. The plant I used to get it from has a lawsuit pending and there is no way to know when or if it will be open again. I got some perlite but it is too fine a texture. I am using it anyway but next time I will get more coarse stuff. I'm sorry I don;t have a good answer for you about where to get pumice. If you go online and google perlite you may find a source near you. There is the raw perlite that is available in different grades and the expanded perlite which is what you see in potting soil. I have not tried the expanded but I did try grinding up a large Styrofoam block and it mainly floated on top of the mix. I can imagine that expanded perlite would do the same. There is another form of pumice called scoria which is dark red in color and is used on the roads in winter. I can get that at the gravel yard and plan to get some soon. I especially want to put it into the mix I use for the floor.
>
--- In papercreters@
>
>
> I am still pumice-less here in NM. The plant I used to get it from has a lawsuit pending and there is no way to know when or if it will be open again. I got some perlite but it is too fine a texture. I am using it anyway but next time I will get more coarse stuff. I'm sorry I don;t have a good answer for you about where to get pumice. If you go online and google perlite you may find a source near you. There is the raw perlite that is available in different grades and the expanded perlite which is what you see in potting soil. I have not tried the expanded but I did try grinding up a large Styrofoam block and it mainly floated on top of the mix. I can imagine that expanded perlite would do the same. There is another form of pumice called scoria which is dark red in color and is used on the roads in winter. I can get that at the gravel yard and plan to get some soon. I especially want to put it into the mix I use for the floor.
>
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