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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.
A rectangular channel is 3 m in width and draws water from a lake. The channel slope is 0.001 and the Manning’s n is 0.0013. What will be the discharge in the channel when the lake
Light-weight Aggregate Prestressed Concrete The use of light-weight aggregate concrete for prestressed concrete construction is well established. The main advantage of light-
California Bearing Ratio (CBR): The most widely used test for determining the supporting power of a soil for designing the thickness of pavements is the California Bearing Ra
A trapezoidal masonry retaining wall 1 m wide at top and 3 m wide at its bottom is 4 m high. The vertical face is retaining soil (φ = 30°) at a surcharge angle of 20° with the hori
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defference between direct and indirect ranging..
select three materials metal and non mealat at least one of the selected materials shold change its property
Calculate the Benefit-Cost Analysis Ratio A city engineer is deciding which of two alternatives to select. If the interest rate is 10% per year, the Benefit-Cost analysis rat
when a precast pile is single point lifting and when double point lifting- what are the moment coefficient of them?
Methods of Constructing Roads in Marshy Areas: The following methods are adopted for constructing roads in marshy areas: (a) Removal of soft soil and replacement with good
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