Geopolymer House Blog

The idea of DIY cast stone houses has proven to be so popular that I’ve started a new blog to facilitate the development of geopolymer housing. It is an open source project to develop geopolymer cast stone construction. The goal is to create an archive of relevant information through an interactive process of sharing ideas … Read more

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 cutting hard stone? I have and I can tell you it’s ridiculously slow even with … Read more

You Can’t Stop a Good Idea Whose Time Has Come

My Stone Dome rating keeps goes up and down. It’s been in the top 10 lately. There’s still time to vote if you haven’t already. But the larger picture is far more important. I think geopolymer is a million dollar idea. Most houses fall apart in a few decades, need constant maintenance and are made … Read more

Ancient Stonework

About two months ago a friend sent me a link to an unusual website by Klaus Dona about ancient stone objects. No one has ever been able to explain how these tools or objects were carved. Basanite stone (lydite) is impossibly hard to carve with the copper or iron tools available at the time, and … Read more

Making Cast Stone Earthbags with Sodium Carbonate

I consider yesterday’s blog post about making cast stone earthbags one of the most exciting developments in earthbag building. This newer, simpler geopolymer process sure seems like it will become popular. It sounds like a million dollar idea to me. I imagine millions of people would love to live in an all natural, affordable stone … Read more

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 or sandstone mixed with water. This is a slightly different method than proposed by Professor … Read more