What is thermo-electric prestressing, Civil Engineering

Assignment Help:

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. 


Related Discussions:- What is thermo-electric prestressing

Rectangular tie, using an optical square how would you perform a rectangula...

using an optical square how would you perform a rectangular tie?

Survey, Methods of orientation,Principles of resection

Methods of orientation,Principles of resection

Sieve analysis, size of sieve to analysis the grading of 10 mm size stone g...

size of sieve to analysis the grading of 10 mm size stone grit

Explain the column effective length, Explain the Column Effective Length ...

Explain the Column Effective Length 1. For a single column, the effective length is simply the unbraced length * the k factor: 2. When comparing an effective length fo

#support reactions, calculate the support reaction as shown in figure;

calculate the support reaction as shown in figure;

Calculate load distribution factor, Load Distribution Factor: The form...

Load Distribution Factor: The formula for deriving at the number of repetitions of the standard axle load during a design period of n years is: N =365 × A × VDF × F [(1 + r

Explain the properties of poly tetra fluoro ethylene, Explain the Propertie...

Explain the Properties of Poly Tetra Fluoro Ethylene? PTFE is a linear chain polymer of great molecular strength, known for its chemical inertness and low coefficient of fricti

Tension members, Tension Members: You have learnt about the Standard s...

Tension Members: You have learnt about the Standard specification for structural steel and various types of structural steel rolled sections. Different types of loads, stresse

What is the withdrawal force of steel nails, In engineering, the code-allow...

In engineering, the code-allowable withdrawal force is zero, due to the wood expands and contracts over time and the nail pullout force can decrease to zero

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd