Primitive Technology: Wood Ash Cement & Fired Brick Hut

  • 🎬 Video
  • ℹ️ Description
Primitive Technology: Wood Ash Cement & Fired Brick Hut

Follow Primitive Technology:

Watch More Primitive Technology:

About This Video:
I built a hut from fired clay bricks and mortared them together with a cement made from wood ash left over from the firing process. When I developed wood ash cement years ago in a previous video, it was in response to the need of a cement made from material other than lime stone, which is absent in my location. Wood ash was suitable because it contains calcium oxide, the active cementitious material for making mortar. I made clay bricks and fired them in a kiln made previously. Then I collected the wood ash and made them into pellets storing them for later use. When it was time to make the mortar, I put the pellets in the kiln and fired them. Here it's important to note that the ash needs to be fired at a high temperature with oxygen, ordinary ash from a camp fire won't work as is because they don't get hot enough. It needs to be pelletized and fired again in a kiln before use. I mixed the fired ash pellets with sand (1:3 ratio by volume) and used it to mortar the bricks together. It's important to use a trowel (flat piece of wood here) instead of bare hands to handle the mortar due to lye burning the skin (I got mild lye burns on my fingers). The ash left over from firing the bricks was enough to mortar those same bricks together. The hut was 2x2 m and 2 m high at the gables. Wooden beams were placed onto the gables to form the roof and secured in place with mortar. Then I made barrel roof tiles and lay them onto these beams. The whole project took 6 and a half months to build. The hut sheds rain well and the mortar is water proof (won't dissolve in water), surviving many rainstorms even before the roof was up. The main take away from this video is to always look for a way to take a waste material (wood ash) and make it into a resource (cement).

About Primitive Technology:
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.

#PrimitiveTechnology #WoodAshCement #FiredBrickHut

💬 Comments on the video

if there's one thing i'm glad for not having changed on Youtube, it's the contagious feeling of willpower this channel provides.

Author — DM DOKURO


The process of people working this all out is absolutely mind-blowing. I imagine the experimentation, refinement of techniques and careful communication our ancestors must have done and am humbled. There's so much knowledge in all your work.
I love all your videos and the sense of peaceful precision you provide

Author — otherwise DM


Having studied chemistry, I was a little concerned when you started mixing the mortar by hand, though glad to see you learned not to without too much damage.

I had no idea tiles alternated like that, though it makes sense

Author — Lewis Massie


This is an excellent video! Looks like your most weather-resistant structure to date! I did want to ask about the clay bricks below grade, are there any concerns about their longevity in the long-term exposed to the ground moisture? Watching this makes me just want to buy some land somewhere and live off-grid.

Author — Preztay Guld


Always a breath of fresh air to see this guy's videos. No talking, no filler or bloat, just one guy showing off primitive buildings and techniques.

Author — Sir Pemberton S. Crevalius


I’ve been following your vids since you started, more or less. Glad to see you’re back in action and doing unprecedented stuff! Your videos are wonderful and give me a feeling of inner peace each and every time. Thanks for staying true to your style for so long.

Author — Aheront


Isso foi uma das coisas mais simples e ao mesmo tempo incrível que já vi 😮

Author — RafaTheSir


I just love how the most basic of materials can be transformed into something so functional and beautiful. I dream of building my own home, and like many the variable of cost is a plague in my mind. So it's just so refreshing and inspiring to see how science and technology, patience, and hard work can yield such incredible results.

Author — KOSM0S


Incredible, as always! 👍

Question: wouldn't having a smoother finish on the convex side of the roof tiles that have said side facing up help with watter drainage, avoid accumulation of debris, moss growth, etc?
(the work done is amazing, just thinking about improvements and the future)
Again, awesome work, video, etc!

Author — José


I rarely find myself in awe of a brick structure, but seeing this come together was impressive. Also exciting to see a more permanent fixture in the portfolio of huts and shelters

Author — Trace Johnson


Man its so relaxing watching your content and making all this crazy staff and the amount of time and effort you spent.. i just want to thank you and to say that i appreciate your work! Keep it up and i would love to see a tour of all the things you've built it would be cool

Author — G_unit22


Amo de mais 💗 os vídeos dele!
Queria um dia fazer o que ele faz!
E um sonho de consumo

Author — Thiago Margalho18


I’ve been waiting for years for him to do the combo brick, cement, tiles and now he finally did it! Chapeau & thank you

Author — Noam Mimon


I remember, years ago, making cordage alongside you (virtually). I have always appreciated the fact that your projects are achievable. This blows me away. I learn so much from your videos. Thank you.

Author — Dean Russell Gadberry


I love how whenever he builds a new hut its always just a little nicer than before. Really makes it feel like he's slowly progressing in ancient technology

Author — Soft -E


Incredible work, this is easily his most ambitious project. Just the sheer amount of clay and firewood needed, its probably hundreds of kg of wood and literally a tonne of bricks. The little details are great too, placing wooden stakes to hold his kiln's wood pile together, placing the mortar pit in the middle of the house to then use as a fire pit.

6.5 months (and countless calories) of effort; I'm sure this structure will remain standing for many years to come. Well worth it, great job.

Author — Bread_45


I admire the work you put into your builds. Great job. Thanks for sharing it with all of us.

Author — rockpaperskizzers


That is an immensely impressive structure! _~checks description~_ "The whole project took 6 and a half months to build."
*_SIX AND A HALF MONTHS!_* I barely finished a model Lego set when I was a kid.

In today's real estate market, that rustic cottage would probably fetch $100, 000 on Zillow.

Author — DareToRS


Que bom que ele voltou postar com mais frequência. 👏👏👏👏

Author — Matheus Fernandes


I feel so lucky to see so many hours of work compressed into a 13 minute video.

Author — Neuro Transmissions