No Spaces Between Stones

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 … Continue reading →

Earthbag Building May be Thousands of Years Old

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 … Continue reading →