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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.
why do we use effective depth ''d'' in calculating the shear capacity of uncracked Concrete beam. If it is uncracked, why cant we use the full depth ''D''.
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WHAT IS TRANSVERSE AND LONGITUDINAL REINFORCEMENT?
Why IRC 37-2012 has taken 90th percentile for pavement design of expressway or NH while they hav taken 80th percentile for state highway design ????????
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Determine the uses of Prestressed concrete poles Prestressed concrete poles are commonly mass produced and are used in most countries for power transmission, antenna masts etc
The Atterberg limits of a clay soil are: Liquid limit = 63%, Plastic limit = 40%, and shrinkage limit = 27%. If a sample of this soil has a volume of 10 cm 3 at the liquid limit a
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Question Given a 1meter high staircase resting on solid concrete, could it be adequate to design nominal reinforcement for staircase? Answer For design of staircase,
Enlongations in solids based on elastic constants
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