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Elaborate the term - Prestressed concrete pipes
Liquid retaining structures, such as circular pipes, tanks and pressure vessels are suited for circular prestressing. The circumferential hoop compression produced in concrete by prestressing counterbalances the hoop tension developed due to the internal fluid pressure. A reinforced concrete pressure pipe requires a large amount of reinforcement to ensure low-tensile stresses resulting in a crack-free member. Circular prestressing produces the required condition of a crack-free member and the material is used more efficiently. Shrinkage cracks also are eliminated in such a situation.
layout of port
Question Why is slump specified in concrete carriageway comparatively low like 30mmwhen compared with normal concrete like 75mm? Answer Slump of concrete carriageway
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types of truss of 15 m cantilever with 1000 kg on free end. May be steel or any lightest material aluminium anodized truss. thanks
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