Why oh why would anyone ever do cutting practise on cement? Just use a crowbar? When I get a functional sword for cutting, I'll be doing straw mats and pool noodles and water-filled milk cartons etc. Not cement. Plate steel I could understand, for testing against armour, or try slicing through some chain mail or leather armour etc. But cement? I just dont' see the point in using a sword to "cut" it, when a crowbar (or another piece of cement) can smash it just fine.