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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.
Q. What do you mean by M A S Accounts? This stands for material at site account. This is a suspense head of account that is maintained to watch actual consumption of materials
The internal forces in any cross-section of a symmetric member in pure bending are equivalent toa couple M The moment of the couple is referred to as the bending moment in the s
Q. Write short notes on Abrasion Test? The abrasion test for ballast shall be carried out using Los-Angeles machine.The abrasive charge shall consist of 12 nos. cast iron or s
Material of steel tendons The material of steel tendons also must be of a high strength. Tendons should possess required material and geometrical properties so that a desired
Determine the total Stopping Sight Distance in feet A motorist is travelling down a 6% grade at 65 mph and needs to stop because of a crash scene. Assuming a 2.0 sec PRT and 1
HOW WE DRAW THE BENDING MOMENT DIAGRAM
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