Primitive Technology: Wood ash & crushed terracotta mortar
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About This Video:
I made mortar from wood ash and crushed terracotta and then used it to mortar bricks together. The ash from previous brick firings was formed into pellets and re-fired in the kiln to calcine it. There is calcium in wood ash which behaves the same as limestone when burned so it will set after being wetted and allowed to dry. The aggregate was crushed terracotta from old broken bricks. These contributed alumina and silica which along with the sodium and silica from the ash form aluminosilicate chains, forming a geopolymer. It forms a noticeably stronger mortar than the previous on I made from wood ash and sand. Also the terracotta is easier to source than sand in this location. Mixing 1 part ash to 3 parts terracotta yielded a useable mortar. A sample was tested after 9 days of drying and did not dissolve in water. I'll likely investigate easier ways to produce this material in future so I can build more structures with brick.
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Primitive technology is a hobby where you build things in the wild completely from scratch using no modern tools or materials. These are the strict rules: If you want a fire, use a fire stick - An axe, pick up a stone and shape it - A hut, build one from trees, mud, rocks etc. The challenge is seeing how far you can go without utilizing modern technology. I do not live in the wild, but enjoy building shelter, tools, and more, only utilizing natural materials. To find specific videos, visit my playlist tab for building videos focused on pyrotechnology, shelter, weapons, food & agriculture, tools & machines, and weaving & fiber.
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