Many ancient structures and works of art may have been made with geopolymer. We’ve talked about this theory on our blog before. This video shows some very compelling close up images that supports the geopolymer theory. If confirmed, the history books will have to be rewritten. The sound quality is not so good, but keep watching and I think you’ll be amazed.
Hempcrete
I’ve been aware of the value of what is called “hempcrete,” a mixture of lime and hemp hurds (an agricultural byproduct), for several years. But I’ve never learned much about how to prepare it, partly because industrial hemp cultivation has been illegal in the United States for the last eight decades, since it is related … Read more


