why does rebar and remesh make concrete so much stronger?
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Worth noting too even in a simply driveway slab where there is no tensile (pulling apart) forces, you still need reinforcing. This is because concrete shrinks just a tiny bit as it sets. This causes uneven tensile stresses across the slab, even in a flat on ground slab. So the steel mesh is used to prevent or at least control the cracking
Second part of this is the jointing you see in most larger slabs. There is a limit to how much stess the reinforcement can manage, so engineers leave deliberate weak points in the slab so the concrete can crack in a controlled location, hidden out of sight. The stronger the reinforcing you use, the fewer joints are needed. If you don’t want to use reo, then just make the joints very close together (like every metre or 3′).
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