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Pre tensioned concrte: Concrete in which reinforcing steel bars are stretched and anchored to compress it and thus increase its resistance to stress.
Post tensioned concrte: It is a technique for reinforcing concrete. Post-tensioning tendons, which are prestressing steel cables inside plastic ducts or sleeves, are positioned in the forms before the concrete is placed.
Pre cast concrete : To cast (a concrete block or slab, etc.) in a place other than where it is to be installed in a structure.
