Casting your own concrete pipes?

[ricebridge]

If one were to consider casting their own concrete pipes... how does one go about it? What does one use as a mold, which can then be removed from the cavity? I know, there are ready-made concrete pipes etc etc, but I'm curious anyway.

 

[Mats-S]

Wine barrel maybe?

 

[NoOne2k]

What are your requirements for the final result and what dimensions are you considering? The easiest way is, of course, to use another pipe as a mold, plastic, or maybe a cardboard tube is the most convenient? Otherwise, you can always build a mold with form boards attached to a round framework.

 

[AndersS]

What are you going to use them for? And it's pipes you're making and not concrete rings/well rings? Concrete pipes were made "standing," among other things, in machines with a removable metal foot at the bottom of the molds where the concrete was vibrated so hard that the core, oiled before each casting, could be removed immediately after they were vibrated, the core was pulled straight down into the space under the machine. After hardening overnight, the metal foot was knocked away. Concrete rings/well rings were made in a similar way.
But that was a description of how they were mass-produced, there was certainly a more manual production before the machine era.

 

[Claes Sörmland]

The YouTube algorithm thought I should see this one a year ago:

 

[ricebridge]

This is the one YouTube's algorithm suggested I watch a year ago:

[media]

Fascinating. Especially the one who seems to throw in some concrete randomly — and it turns out exactly right.

 

[AndersS]

One throws in and distributes with an iron bar/pipe while it rotates. What I described was the method in the 70s in Sweden, then the concrete pipes were replaced by "plastic" in various forms.

 

[Prodigys]

You throw in and distribute with an iron bar/pipe while it rotates.
What I described was the method in the 70s in Sweden, then concrete pipes were replaced by "plastic" in various forms.

Still, a large number of concrete pipes and wells are manufactured even though plastic has a larger market share now than in the 70s.

 

[AndersS]

Actually thought that all pipes in Sweden had been replaced with "plastic" haven't seen any in the last 20 years, but maybe they exist in the largest dimensions. Feel free to tell more as I made well bottoms and trekammarnbrunnar between military service and continued school once upon a time.

 

[Prodigys]

I actually thought that all pipes in Sweden were replaced by "plastic," haven't seen any in the last 20 years, but maybe they exist in the largest dimensions. Please tell me more since I made well bottoms and three-chamber wells between military service and continued school once upon a time.

In principle, all mains for stormwater and sewage are in concrete along with associated wells. It's cheapest that way since you can refill with any junk. Plastic requires finer material and is more sensitive to poor packing underneath.

With concrete, you also have an estimate of how long its lifespan is in large networks, plastic isn't as well tested yet. And it’s easier to repair concrete pipes without special gadgets.

 

[NoOne2k]

In principle, all pipes for stormwater and sewage are made of concrete, as well as the associated wells. It's the cheapest because you can backfill with whatever junk. Plastic requires finer material and is more sensitive to poor packing underneath.

With concrete, you also know approximately how long it will last in large networks; plastic is not as well-tried yet. Also, it's easier to repair concrete pipes without special equipment.

I'm not sure if I agree with what's most common. It varies greatly depending on who the owner of the pipelines is. I know that the Swedish Transport Administration often uses concrete, but at my job (Karlskrona municipality), we almost exclusively use plastic pipes.

I can agree with you that concrete is better where there is higher load on the pipes, the major disadvantage of concrete is its sensitivity to hydrogen sulfide formed in wastewater networks.

 

[Prodigys]

Not really sure if I agree with what's most common. It varies greatly depending on who the owner of the infrastructure is. I know that the Swedish Transport Administration often uses concrete, but at my job (Karlskrona municipality) we almost exclusively use plastic pipes.

Maybe that's true, I was just going by what I've seen. In the municipalities where I've been in contact with pipes and wells, everything in streets that is 400ø or larger has been concrete.