الفهرس 
Literature ReviewOnly 14 pages are availabe for public view
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Abstract
The use of high stress in the concrete structural elements in concrete structures has become common usage to a large extent due to the evolution of the large industry in the field of reinforced concrete so that it is easy to obtain concrete with a high-stress even in normal site conditions. Show the importance of using concrete high stress, especially Ay installations and high bridges with the seas and large high-rise buildings to the advantage of their concrete high stress of considerable resistance in pressure and significantly improve the tensile properties and the next led to use to get on the sectors of concrete smaller and high resistance from sectors manufactured as a result of reduced the dimensions of the sectors of construction, leading to their use has become a economic objectives.