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Aye, we've been reading up on that papercrete and variations of the mixture. I'll stick with my straw bales and earthbags, seem so much stronger and long lasting.
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I would not worry about a wire armature in the oven, unless it is lead, which melts at 158F (70C). Aluminum melts at 1218F (659C), and steel loses its strength at 1500F (816C) and melts at something like 2800F (1538C). Your PM would have turned to gas long before then.
Sue
Lead doesn't melt at 70C, more like 327C. Big difference, if what you said was true lead would melt in boiling water.
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I'm sorry I wasn't more explicit. I was talking of wire for armature and thought some people might use lead solder (which looks like wire), and it will melt at a fairly low temperature (often below 190 °C /374 °F). I've melted it with a single match. It may soften at lower temperatures, which would make it unsuited for armature, and probably dangerous as well.
Thank you for catching my error. Your figures are indeed correct for melting lead for things like bullets and fishing weights, and probably most other things.
Sue
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