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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.
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
Briefly explain the difference between compaction and consolidation of soil. What is the effect of compaction on soil properties? Ans.- Compaction - The process of increas
The atmospheric pressure is given 680 mm Hg at a certain mountain location of elevation 2000 m. air density is 1.007 kg/m3. Find the pressure in kPa.
Ground Water Levels The location of the ground water level is essential for deep excavation, water-logged areas. The existing wells in the nearby vicinity of the proposed site
A steam turbine with base 6 m × 3.6 m weighs 10,000 kN. It is to be placed on a clay soil with c = 135 kN/m 2 . Find the size of the foundation needed if the factor of safety is to
Enumerate the term - Failure Due to Crushing of Concrete Over reinforced pre-stressed concrete members, provided with a large amount of pre-stressing steel or relatively small
property of aggregate in high strength concrete
Shrinkage of concrete in prestressed members The shrinkage of concrete in prestressed members results in a shortening of ensioned wires and hence contributes to the loss of st
Physical Classification Based on the structure, the rocks can be classified as following: Stratified rocks Un -stratified rocks A. Stratified Rocks: These ro
Determine the Characteristic Load for structure The Load, which has 95 percent probability of not being exceeded during the life of a structure, is considered as characteristic
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