Building a Cement-Based Boiler: Tips Needed!
Asked by CleverCactus93
I'm planning to build a steam boiler using a cement and vermiculite (or perlite) mix, and I want to coat the inside with rubber. I'll be using a 3kW water heating element for the heat source. I'm considering adding a metal mesh to prevent cracking, but I'm also worried that it might cause more cracking due to differences in heating and cooling rates. I can't afford to go with a full metal design, so I'm sticking to this method, even though I've heard metal might be necessary. I need this boiler to last about 4-5 months, and I have some extra cement for repairs. Any advice would be really appreciated since this is my first time trying to build something like this!
Answers
Going with a cement mix can be tricky, but it’s definitely doable! Just make sure to mix it thoroughly and allow proper curing time. The metal mesh is a good idea, but consider the type of rubber you use on the inside—some can handle heat better than others. Just be careful about how hot things will get! Size-wise, what capacity are you planning for?
Reply to this answer
I'd recommend checking out heat-resistant coatings rather than just rubber since it may not hold up well to the steam. Cement's great for thermal mass, but a good seal is crucial to prevent leaks. Just monitor the heating element to ensure it doesn’t overheat. Good luck, and remember, safety first!
Reply to this answer
Add your answer
Answers are reviewed before publication.
CuriousBeekeeper77: I'm aiming for about 30 liters.