cast stone earthbag

No Spaces Between Stones

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This photo shows the near impossible to make perfect fit between stones that indicates they may have been cast in place with geopolymer. One source said iron tools were not available at that time, only copper. Ever tried chiseling and cutting hard stone? I have and I can tell you it’s ridiculously slow even with … Read more

Earthbag Building May be Thousands of Years Old

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Major Breaking News. Tim, one of our readers, sent me some information the other day that explained how Bill McNulty has patented the process of making cast stone using natron salt (sodium carbonate) mixed with powdered granite, limestone, basalt, schist or sandstone mixed with water. This is a slightly different method than proposed by Professor … Read more