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But is it cheaper? (or could it be) Wood, stone, pretty much everything is stronger than concrete. We use concrete because it's strong enough and cheap (and d
by throwaway0a5e 4y ago
But is it cheaper? (or could it be)
Wood, stone, pretty much everything is stronger than concrete. We use concrete because it's strong enough and cheap (and doesn't rot like wood, but a lot of things don't rot so that's not too novel).
- adhesive_wombat 4y ago> and doesn't rot like wood Unless you get an alkali silica reaction (aka concrete cancer).
- Enginerrrd 4y agoTwo points: 1. The article says its "cheap" for what that's worth. 2. This IS concrete. It's a mixture of sand as aggregate and plastic as a cement AKA binding agent.
- echlebek 4y agoI thought this was pretty cool, but then 50% of the recommended posts are about NFTs, which are a known scam. They are also by the same author as this post. So this tells me the author isn't necessarily looking at things with the most critical eye.
- Isamu 4y ago>Wood, stone, pretty much everything is stronger than concrete. Hang on, compressive strength is very, very high. Tensile strength is much lower so that’s why we add rebar and mesh.
- halffaday 4y agoTypical compressive strengths in concrete mixes for construction applications is often around 3000psi, which is actually about the same as HDPE. “Flowable fill” might be closer to 800-1000psi, which is close to end-grain compressive strength of some common lumber products. Special concrete mixes can be used to get almost 20,000psi, which is a bit less than steel (which has much higher tensile strength). The real value proposition of concrete is that it’s made out of very common materials and can be produced in enormous quantities in most places in the world at low cost.
- keithnz 4y agothey say 25% cheaper than concrete. The video posted in another comment (https://www.youtube.com/watch?v=iFcPqXxAUWM https://www.youtube.com/watch?v=iFcPqXxAUWM) has a lot of details