In Hawaii, where there is much volcanic aggregate ( tufa ? ) locally available, it could substitute for some of the sand required in the mix & it might add some insulative value to a papercrete shelter too - due to the air entrained in the particles. I wonder if anyone has heard of any Hawaiian papercrete projects? The warm and windy climate should dry out panels rather quickly all winter long. Passing the crushed volcanic gravel though an 1/8th screen might work for substituting some of the sand? All of the sand?
I've heard that thinshell concrete enthusiast in Mexico and elsewhere have used old fishing nets as support and reinforcement for tufa thinshell concreto residences near Todos Santos in Baja. They are unique and ingenious - beatiful to behold. And some used fishing nets just showed up on hawaii craigslist too - prompting this posting.
I suspect a thinshell arch would easily support a drying papercrete panel layer and the second fishnet & tufa/portland w additives thinshell top coat would protect the papercrete from erosion. The DOUBLE layer might make it really extra strong too during typhoons events. The modified concrete admixture seeping between the papercrete panels would bridge the two layers, connecting them usefully and structurally into a strong double concentric arch.
I remember how sweet potato vines grew perennially to shade dwellings in the Mx desert sun. Sweet permaculture! And the underlying roof arch directed the dew and scanty rainwater there through collection channels. I haven't been able to get it out of my mind since. I'm ready to practice on the Hilo chicken shed.
Papercrete & thinshell sandwich - hmmm.... Any big island patrons out here that want a great design and beautiful shelter? The CL offer is for quite a few square yards of fishnet.
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