Determination of Calibration Factor of Rebound Hammer as per IS 516 (Part 5/Sec 4) : 2020

In this video , we will discuss in detail for establishing a correlation between rebound hammer and concrete strength by concrete cube. The most satisfactory way of establishing a correlation between compressive strength of concrete and its rebound number is to measure both the properties simultaneously on concrete cubes.
The general correlation can be derived from concrete cubes used in smaller projects in a region with similar materials including cement type and the same shall be repeated every year. For bigger projects at least three cubes each for three different concrete grades shall be cast and tested for establishing the correlation. Cube specimens should be wet cured for 27 days and they should be removed from wet storage and kept in the laboratory atmosphere for about 24 h before testing.

[@HIGHWAYENGINEERING]

Sir your are a inspiration for many civil engineers..with watching your videos we eager more to know more knowledge about standards.

[@HIGHWAYGUIDE]

Thank u very much

[@ahteshammulla]

Have been a fan ur informative videos from last 2 years sir. The way u explain and very small small details also u cover is absolutely brilliant, u r not less than a boon for qc engg sir.

[@HIGHWAYGUIDE]

Thank you very much

[@ahteshammulla]

@@HIGHWAYGUIDE sir I had some doubts with this test how can I contact you

[@HIGHWAYGUIDE]

@@ahteshammulla [e-mail]

[@khanfahad93]

Bht bht shukriya sir ❤❤❤❤❤

[@Arunkumar-cl7xs]

Thank you for the video sir, its really helpfull.
Pls clarify my doubt.
Derived correction factor is applicable to 3 different test orientation? Generally rebound Hammer graph showing 3 slope lines respect to direction of test (Horizontal, Vertical downward, Vertical upward).

[@dineshprajapati693]

Great sir, thank you so much sir for sharing your knowledge with us

[@HIGHWAYGUIDE]

THANK YOU 🌷

[@Sanjeevyadav10585]

Great sir

[@muthukumaransk8669]

Thanks for video 🤝

[@HIGHWAYGUIDE]

Thank you

[@sanjaysikarwar9371]

Very knowledgeable, thanks sir

[@HIGHWAYGUIDE]

So nice of you

[@ujjwaldey8764]

Thank you Sir

[@ramkipothuraju9483]

Sir, Good knowledge for civil engineering

[@HIGHWAYGUIDE]

Keep watching

[@zeeshanali-et8cg]

Pls tell me sir where is that table which show 30-40 strength is good, where it is mention in code

[@swapnilpatil8644]

Nice video sir
Sir please increase frequency of video you give good knowledge for civil engineer thanks

[@HIGHWAYGUIDE]

OK will try

[@awngawngkyaw]

It's very useful Sir

[@HIGHWAYGUIDE]

Keep watching

[@pramoddwivedi9531]

Sir please provide me format of rebound hamare

[@mscivilconstruction2338]

sir is code ke according kitne test kar sakte hai site pe

[@shailendravishwakarma369]

Kaise karte hai

[@rahulgagan471]

Nice video sir

[@HIGHWAYGUIDE]

Thanks

[@SyedAli-vz2id]

Sir rebound hammer may dispersion value di hoti h uska kya use hota h

[@HIGHWAYGUIDE]

It is minimum and maximum permissable value

[@smartcivilengineering_tech2679]

Can you mention the rebound hammer make and specifications

[@HIGHWAYGUIDE]

ASEW

[@sourav-bb8ei]

Apne ya kha sa liya ya hamre pise ha

[@noexception9598]

Sir do we have to remove plaster from (column or RCC) to perform this test on that structure?

[@esportzgaming1140]

Yes. Due to void possibility between actual surface and plastering

[@moolchandsingh6650]

Sir Ek video DBM and BC ke mix design with found all properties.

[@HIGHWAYGUIDE]

We will try

[@rupambalki4461]

Can anyone please tell that For how many days the calibration of rebound hammer is valid?

[@HIGHWAYGUIDE]

6 Month

[@civilpanecea2590]

Sir correction factor limit bhi hoti h kya 1.10 ya isse above

[@HIGHWAYGUIDE]

@@civilpanecea2590 No

[@dharamnishad7482]

Ndt testing ke saare videos please

[@HIGHWAYGUIDE]

OK , Sure

[@deepakrajput-yq5jo]

Sir please frequency bataiye ki kitne area me krna chahiye

[@HIGHWAYGUIDE]

There is no specified frequency.

[@ajaymaurya8680]

Corelation between rebound number and cube Strength only for manufactures sir ji third party ke liye nhi h

[@HIGHWAYGUIDE]

Please read the code

[@mscivilconstruction2338]

sir ap question ka reply nai krte to hame pta kaise chle ga plz reply kiya kijeye thanks

[@HIGHWAYGUIDE]

What you know , please mentioned .

[@visioncivil1143]

Factor ka use kaha karte hai sir

[@HIGHWAYGUIDE]

To find out the compressive strength 👍

[@visioncivil1143]

Relation ship of rebound indices and actual ctm strength

[@shailendravishwakarma369]

Sir sand me coloright

[@HIGHWAYGUIDE]

Unable to understand ?

[@arunkumar2929]

UPV test sir

[@HIGHWAYGUIDE]

Sorry , I have no instrument

[@dkmaurya8720]

Zero to 100 होती हैं sir

[@HIGHWAYGUIDE]

What is 0 to 100?