How the descending part of the stress-strain curve of concrete under uniaxial compression can be determined experimentally?

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What is the reason of collapse of water tank shown in the attached you tube?

https://www.youtube.com/watch?v=WLEkC_JbTsQ

03 April 2017 1,301 2 View

Which type of multiple-cell box girder is better, cells connected by top flanges or cells connected both by top and bottom flanges?

How we can design box girder bridge?

02 March 2017 10,163 3 View

Why do BS8007 specify the allowable crack width of water retaining structure as 0.2mm for severe or very severe exposure?

Why 0.2 mm crack width?

02 March 2017 9,354 3 View

What is the effect of rusting on steel reinforcement?

How does rust affect on the bonding between steel bars and concret?

02 March 2017 3,458 10 View

In “High strength concrete” in buildings, 56 or 91-day compression test results are sometimes adopted instead of 28-day compression test results. Why?

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02 March 2017 8,839 19 View

What is the difference between working stress approach and limit state approach?

What about difference between those approaches regarding load and material safety factor?

02 March 2017 587 2 View

In carrying out compression test for concrete, should test cubes or test cylinders be adopted?

Relation between cubes and cylinder

02 March 2017 5,836 4 View

If concrete compression test fails, should Schmidt hammer test be adopted as an alternative test to prove the concrete strength?

Non destructive tests

02 March 2017 5,452 31 View

It is not necessary to design nominal reinforcement to piles. Is it true?

Can we use same code provisions of columns for piles?

02 March 2017 7,906 3 View

Can a concrete structure be completely free of expansion joints and contraction joints?

Assume that there is no differential settlement.

02 March 2017 7,651 3 View

Where can I find the recent population of Indian cities (2020s) ?

Census data seems only to reach the year 2011, but there might be estimates somewhere that I cannot find? I am looking not only for the largest cities but also towns etc. Thanks!

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Is there any machine to do real time pcr?

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Purification of gst tagged protein

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Amjad Albayati

it can be done by using strain control test machine

Nazar K Ali Oukaili

By using special type of compression machines where displacement increments shall be induced rather than load increments.

Very skilled personals only can work over these machines

Ayman Elzohairy

This type of machine called closed loop machine which are displacement control.