why does rebar and remesh make concrete so much stronger?
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Concrete is very strong in compression – when it’s squeezed.
It is very weak in tension – when you try to use it to pull.
The rebar or mesh carries most or all of the load when the structure demands that the material used have some tensile strength.
Different designs can mean that the rebar may put a large amount of compression on the structure by itself, squeezing it together, if it is properly designed. This can make the whole structure very strong.
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