This is a legit method for building small things like that where you can use the brick-like shape of the bag when it's hardened. You just need to make sure the concrete gets soaked all the way through with a hose or rain.
There's a park on the lake near me that has a retaining wall that steps down into the lake swimming area built this way. The bags are rotted away so they're just concrete pillows now. They're been there at least 20 years
That's exactly how I built a retaining wall at my last house. It had rotting railroad ties that I got rid of and I just stacked bags of concrete before it rained. The concrete set, the bags degraded, and I had a cool retaining wall in my back yard.
Lots of revetments for water control in South Florida were built like this in the past. The burlap sacks all eroded away and leave an interesting pattern like you mentioned.
Please put an NSFW tag on this. I was on the train and when I saw this I had to start furiously masturbating. Everyone else gave me strange looks and were saying things like “what the fuck” and “call the police”. I dropped my phone and everyone around me saw this image. Now there is a whole train of men masturbating together at this one image. This is all your fault, you could have prevented this if you had just tagged this post NSFW.
When I was checking my notifications I was confused as to why would someone send me a pic of a rock formation in the wild and then the horror hit me... 😱
This is exactly how the bridge on a piece of property I used to live on was built. It lasted 20 years but eventually washed out, while I was there, ofc.
lol if I started that job right after lunch it wouldn't be done by 5. i don't know the proportions, but it would be partly because I'm out of shape af and partly a lack of rats asses to give
As an Engineer (although the IT kind not the structural kind), I can tell you confidently that no solution is more permanent than a temporary solution.