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What is Thermo-electric prestressing
We know that, stretched tendons are used in prestressed concrete. Stretching of tendons may be accomplished by using jacks or by other means. Thermo-electric prestressing is just another method of stretching the tendon wiers. We know that if we increase the temperature of a metal, it expands. As the name suggests, in Thermo-electric prestressing, temperature of tendon wires is increased by passing electric current for a short duration. This temperature increase, taking place within 3-5 minutes, may be of an order of 300-400°C. The bars, which may undergo an expansion of about 0.4-0.5% in length, try to shorten at cooling butare checked by fixed anchors at the two ends.
Distinguish among 'active' and 'passive' earth pressure. Describe clearly Rebhann's graphical construction method to evaluate the earth pressure on a retaining wall. What are t
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Atomic weight of an atom is equal to? Answer: sum of the number of protons and neutrons.
Q. Show the Excessive movement joints in bridges? Movement joints are generally added to bridge structures to accommodate movements because of dimensional changes arising from
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