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

Calculate the amount of import or export, Calculate the Amount of Import or...

Calculate the Amount of Import or Export For the project site shown in Figure, the amount of import or export to bring the entire site to elevation 90-ft is most nearly:

Compare the probabilities, Compare the probabilities: Use the central ...

Compare the probabilities: Use the central limit theorem to compute P (¦ X - μ ¦ ≥ k), k = 1, 2,3,4,5 where X and μ are as defined in Example. Compare the probabilities with t

Can you explain curved heads, Q. Can you explain Curved heads ? In case...

Q. Can you explain Curved heads ? In case of rivers carrying high discharges of the order of 28300 m 3 Is and above, Gale's recommendations are more conservative than Spring's

Show the differences between GGBS and PFA, Q. Show the Differences Between ...

Q. Show the Differences Between GGBS and PFA? The use of GGBS as substitute of cement improves smaller reliance on PFA. Particularly GGBS is supposed to be more compatible with

Expansion joints in basement, I have building 50 m * 53 m 3 floors without ...

I have building 50 m * 53 m 3 floors without expansion joint in basement what are opinion please ? thanks

Mixed ground with soils and boulders, Ground settlement occurs when pipe-ja...

Ground settlement occurs when pipe-jacking machine enters mixed ground with soils and boulders? The rate of cutting through soils is faster than cutting through boulders for pi

Explain the aashto classification system, Explain the AASHTO Classification...

Explain the AASHTO Classification System   1.  Identify the percent passing the No.10, No. 40, and No. 200 sieves. Identify the LL and PI of the fraction passing the No. 40 sie

HIGHWAY CONSTRUCTION & MAINTENANCE, what is the difference between feasibil...

what is the difference between feasibility study and traffic counting

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