Amish and Russian Concrete superior and "cheaper" than Portland Cement - used by Foundries

Seriously take a look at this



I personally need written instructions  and have a hard time absorbing their instructions

I'm finding this interesting Scott, but am struggling to find good references... I did find that Sodium silicate is waterglass, which is generally considered pretty innocuous and is used as an additive in conventional concrete for waterproofing and hardening. It also seems to quicken the setting time.

Is this method waterglass + wood ash + sand to make concrete?

Poetic chemistry, I first thought.  Fascinating  stuff, thank you,  I am wondering how this compares with the esteemed Roman building materials.......pozzolans like volcanic ash make a huge difference.   Chemical reaction fans, geologists, earth aficionados, please share your ideas.