ABSTRACT
In prestressed concrete, internal stresses are initially introduced so that the subsequent stresses resulting from superimposed loads are counteracted to a desired degree. Prestressing is applied by means of high-strength tendons in tension passing through concrete. This can be achieved in two ways, main distinction between the two methods being whether the tendon is tensioned before or after concrete is cast, hence terms pretensioned and post-tensioned (Campbell and Soudki, 1996).
Pretensioning: Tendon tensioned before casting of the concrete
