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Prestressed or pretension concrete uses wires and reinforcement to strengthen concrete's inherent weakness. It prevents cracking and buckling and adds years of useful life to the building structure.
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Which grade of concrete is used in pre-tensioned prestressed concrete structure?
42 mpa for pre tension and 35 mpa for post tensioned
What is difference between pre tension and post tension precast girders of bridge?
A simple explanation: PRE tensioned- cables are tensioned, and the concrete is cast around it. The tensioning is done BEFORE casting the concrete (PRE = before). POST tensioned- cables are placed inside of ducts or are greased to prevent bonding to the concrete, the concrete is cast around the cables, and then the cables are tensioned after the concrete has reached a desired strength. The tensioning is done AFTER the concrete is cast (POST = after).
What is the definition of post tensioned concrete?
Post tensioning is the prestressing of a concrete member by tensioning the reinforcing tendons after the concrete has set
Difference between pre-tensioned and post-tensioned?
what a wicked page, really helpfull Difference between pre-tensioned and post-tensioned?
Pre stressed concrete compared to Post tensioned concrete?
Prestressed concete made using high tensile wires which is stressed (as per the design load) before concreting, and post tensioned concrete made of Strands covered with duct, in this, wires/strnads are stressed after concreting then the ducts are grouted using cement slurry..
What is the method of increasing the strength of a beam or rod by applying tension called?
Pre tensioned concrete best illustrates this concept. Tension in the rods becomes compression in the concrete once the cables are cut at the ends of the beam.
What are the advantages and disadvantages between post tensioned slab and pre tensioned slab?
post tension: the forces considered as outer force since pre tension forces are internal forces.
What are Advantage pre cast concrete slab than insitu concrete?
What are Advantage pre cast concrete slab than insitu concrete?
What are the advantages and disadvantages of reinforcing and prestressing concrete?
Advantages of Pre-cast Concrete- Pre-cast concrete slabs are usually the correct size as it is manufactured off site.- Pre-cast concrete saves a lot of time on site as it is manufactured off site.- Pre-cast concrete also saves a lot of space on site as pre-cast concrete is usually on site when required.- Pre-cast concrete saves money in terms of labour on site as pre-cast concrete can usually be assembled by semi skilled operatives.Disadvantages of Pre-cast Concrete- Pre-cast concrete lacks design and dimension flexibility as the manufactures may only have fixed shapes and sizes.- Pre-cast concrete may affect the construction programme as the delivery on site may not always be on time.- Pre-cast concrete may incur addition financial costs as delivery on site may not always be on time.- Pre-cast concrete allows for a very small margin for error as the incorrect dimensions of pre-cast concrete may result in changing the entire design.
What material where used to build the London bridge?
The present bridge is a pre-stressed concrete box girder bridge.
What is the definition of pre?
Pre means before.
What is the definition of concrete nails?
Nails that are hardened for use in concrete
