A watertight mold will give you papercrete that will take an exceedingly long time to dry, if it ever does. Papercrete is not anything like concrete and does more of a dry and cure thing than setting like concrete. After it dries thoroughly, you need to keep it dry because it will reabsorb water.
Since I don't put sand or dirt in my papercrete I can't recommend how much, but have read of people putting quite a bit in, often more than the paper and cement.
spaceman
prrr.t21@btinternet.com wrote:
Hi I plan to use sand - we really have nothing on site, there isnt the space to harvest anything here. How much sand would be needed to stop the deformation that's usual with building blocks though, I fear it might need a lot of sand. If everything shrank uniformly without deformation I'd be happy, but I've not seen an example of that happen yet. When I've got the new moulds done I hope to try an assortment of new mixes, see if I can get somewhere. One approach I'm hoping to try is to use a watertight mould so no drainage occurs until the cement's set. Thanks, NT ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/papercreters/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/papercreters/join (Yahoo! ID required) <*> To change settings via email: papercreters-digest@yahoogroups.com papercreters-fullfeatured@yahoogroups.com <*> To unsubscribe from this group, send an email to: papercreters-unsubscribe@yahoogroups.com <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
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