I have not used sawdust but I have cemented over wood. Did not work, the wood absorbs moister and cracks the concrete. Ancient method used to quarry stone like granite, drive in wooden wedge and then wet the wood. The forces are tremendous.
--- In papercreters@yahoogroups.com, "Jeff" <jnlgomes@...> wrote:
>
> I have a good friend who has a saw mill and he has told me he can give me all the saw dust i want . Has anyone tried to make these papercrete blocks useing sawdust?
>
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