Rebound Hammer Test | Schmidt's Hammer | A Non Destructive Test on Concrete | Surface Hardness Test

A Non Destructive Test (NDT) is a way of testing a structural element without causing any destruction, there are two types of tests,
1) Destructive Test
2) Non Destructive Test
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Destructive Test is done before casting concrete or construction material onto the site, for example Compression Test of Concrete Cubes, i have explained in detail how to operate compression testing machine in my one of the videos, the link for that video is • Demonstration of Compr...
Non Destructive Test is a test performed on the structure without causing any harm to the structure. One of the primary method is Rebound Hammer Test.
Rebound hammer is a instrument which gives us the relative compressive strength of concrete based on the hardness of its exposed surface. It was invented by Swiss Engineer Ernst Schmidt, it is also known as Schmidt's Hammer or Swiss Hammer.
IS:13311 (Part 2)-1992, BS 6089-81 explains the standard rebound hammer test procedure.
Precautions to be followed while conducting Rebound Hammer Test:
1) The surface should be smooth, clean and dry.
2) Rough surface should be made smooth by grinding stone
3) The point of impact of hammer should be atleast 20mm away from the edge or sharp discontinuity
I am thankful to my colleague Miss. Swaroopa Aptekar for shooting this video and special thanks to my Institute KLS's Shri Vasantrao Potdar Polytechnic for allowing me to carry out Rebound Hammer Test
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#reboundhammertest #nondestructivetest #concretetesting #reboundhammer

[@avisrivastava1080]

The perfect video that i want to see about rebound hammer test
Thanks a lot

[@structuralanalysisanddesign]

Thank you so much for the compliment, we are happy this video helped you, keep supporting and sharing

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[@tgazri2011]

Finally someone who speak english, good explanation

[@megabite2137]

As usual, one of the best Demo . appreciate your time sir

[@structuralanalysisanddesign]

Thank you so much for appreciating the video, stay tuned for more lab experiments

[@11221122gamer]

dear, you have explained it way better than anyone, thank you :)

[@structuralanalysisanddesign]

Thank you so much Zain, these kind of words motivates me to do more videos :)

[@sudiptaguria2062]

It's an essential video for civil engineering students

[@mdruhulsk9643]

First time i have seen the rebound hammer. Very good.

[@structuralanalysisanddesign]

Thank you, keep watching and sharing

[@YadavChandan0]

One of the best video on you tube thanks sir

[@structuralanalysisanddesign]

Thank you so much Chandan Kumar, this motivates more to do videos, keep supporting us

[@mohanbabupm5778]

Good explanation iam benifitted

[@sabriarahman9641]

Thank you

[@primeconcreteproducts7145]

Man, This is very great.. Thanks alot Keep it up

[@structuralanalysisanddesign]

Thank you, Glad you like it! Keep watching and sharing

[@basitriyaz914]

Thanx a lot sir

[@safdaralam7935]

VERY INSTRUCTIVE AND CONSTRUCTIVE TO US.

[@structuralanalysisanddesign]

Thank you so much Safdar

[@poshandas8112]

Thank you so much sir..🙏🏻

[@abhiramsudhakaran2401]

Simple and clear 👌

[@structuralanalysisanddesign]

Thanks Abhiram, stay tuned for more videos and check out my Patreon Profile

[@bharathkumarbs275]

More helpful to us this exp sir thank u so much sir

[@structuralanalysisanddesign]

Always welcome, all the best, keep supporting

[@arpitapawar4562]

Best demo sir 👌

[@structuralanalysisanddesign]

Thank you Arpita, keep supporting us

[@prasadam]

Good explanation sir...Tq

[@structuralanalysisanddesign]

You're most welcome, keep watching

[@camsect4619]

Thanks for your video, and they can use the result of mean compressive strength from Schmidt to design the existing structure?

[@snktj_]

Well explained sir 🙏🏼

[@structuralanalysisanddesign]

Thanks for liking, keep watching and sharing

[@aminedest9929]

thank you !

[@structuralanalysisanddesign]

Welcome, stay tuned for more videos

[@lalanthadilshan5487]

Very good explain

[@structuralanalysisanddesign]

Thanks for liking, keep supporting and watching

[@hathiramgugulothu1023]

Very good explanation.

[@structuralanalysisanddesign]

Thank you for appreciating, watch out our more civil engineering videos

[@amithinge3081]

Sir thanx for such a good vedio

[@structuralanalysisanddesign]

Thank you so much Amit, help us to reach more audience by sharing and supporting

[@rajurongali96]

Thanks boss 👍 nice explanation

[@structuralanalysisanddesign]

Always welcome

[@SteelRCC]

Well done Abhijeet

[@structuralanalysisanddesign]

Thank you so much sir

[@shahbaazkhan4978]

Sir vertically upward or downward kr liye Kya correction use karte hai please explain with example ?

[@sumitkumarpaik4012]

Can it be useful for testing the comparatively low strength lining ??

[@kishoregowrish1373]

Nicely shown

[@structuralanalysisanddesign]

Thank you, more practical videos will be coming up, stay tuned

[@ashwinim.c8662]

Super sir ......thanks

[@structuralanalysisanddesign]

Thank you so much for watching, we are happy this video was helpful for you, keep watching

[@vijenderkumar2494]

Sir , dispersion reading on RHS ie 4.5 ,6 , 6.5 and so on for which purpose.

[@rejaulansary9166]

Thank You.... Sir

[@structuralanalysisanddesign]

We are glad that this video was useful to you, stay tuned for more videos

[@shubhamumbarani6996]

Thanks to this video sir

[@structuralanalysisanddesign]

We are glad this video has helped you, stay tuned for more videos

[@civilsiteeducation6207]

Good. keep it up.

[@structuralanalysisanddesign]

Thanks, will try my best

[@sushi0607]

Nice explanation

[@structuralanalysisanddesign]

Thank you sushil

[@johncadengineering9746]

if u test horizontal,you can found directelly the result of vertical above and below

[@manokarthik2681]

How to determine the achieved structural strength is adequate or not? which code practice we need to follow? As per the code practice what is the statement is there to compare the concrete is achieve the required strength or not?

[@sadhanatalluripragatiengin1271]

Super

[@ulasalagangadhar765]

Super sir ❤️❤️

[@structuralanalysisanddesign]

Thank you so much, keep watching and sharing

[@chintu9969]

Excellent sir tq 👍

[@structuralanalysisanddesign]

So nice of you, all the best

[@chintu9969]

@@structuralanalysisanddesign tq sir

[@PankajSingh-me4th]

Liked it

[@dntknwwhy]

Thank youu!! ❤️

[@structuralanalysisanddesign]

You're welcome 😊 keep supporting

[@dntknwwhy]

@@structuralanalysisanddesign can you also do how to get compressive strength using pulse velocity from ultrasonic pulse velocity test ?

[@WorldEngineersOnline]

One question - When you do rebound on the column you have the "plastered layer" which is surely less than the mass concret. So the rebound reading is not correct on the mass concrete. How you determine this real strength

[@abdidahirhassan2710]

Thnks Sir

[@structuralanalysisanddesign]

Welcome, all the best

[@rehansayyed8373]

sir ji plz btaao hamari building 7th floor ki aur hum 1st par rehte h to kya 10 fit ka huge fish tank ba sakta hu ? jis ka total weight water stand glass ke sath kuch 4 ton tak ja rha h to kya yeh safe h ? koi risk to nahi pl z say

[@KhetkiRaj]

Number of reading or test should be 16 in 1'*1' area (away from edge). And eliminate upper and lower 3 reading.

[@danishhasan8380]

what is the acceptance criteria

[@jegadeesana1904]

Nice

[@structuralanalysisanddesign]

Thanks

[@d7aconic]

I've got a manual for this test and it says not to calibrate using curves on the hammer.It says to use the central calibration chart.Why so?

[@ethandkharofficial2804]

Sir please upload videos on the operation of Ghat tracer .

[@structuralanalysisanddesign]

I will try to come up with Ghat Tracer

[@amarpc3532]

Sir if rebound hammer is new then also do mandatory on cube test

[@civil-tech539]

Sir i need calibration work sheet of rebound hammer...can u help me?

[@scientificnature]

How can it be calibrated ?

[@subashgovin6114]

Thanks you sir

[@structuralanalysisanddesign]

Welcome Subash, stay tuned for more videos

[@subashgovin6114]

@@structuralanalysisanddesign surely sir

[@sightseeingtours7820]

Bro, I need ASTM 805 rebound number chart

[@shrinivasmudigoudar6570]

Nice and Important Information+++++++++++++++++++++++++++++++++

[@structuralanalysisanddesign]

Thanks and welcome

[@unknownfacts-tamil2226]

Nice video bro

[@structuralanalysisanddesign]

Thank you, keep supporting

[@e.sdesignsolution9098]

Sir make a video on ultrasonic pulse velocity test

[@structuralanalysisanddesign]

ya i will try to make on it

[@sushwinb5850]

Informative.ifcallibiration is not proper.should it be sent to the manufacturer or we can do it.

[@structuralanalysisanddesign]

Thank you,
Its better to send manufacturer and get calibrated

[@gokuls3536]

What is the ideal range?? how we can interpret our building is strong or weak?

[@civilsiteeducation6207]

By testing of NDT and DT tests.

[@dr.v.rajendranvelayutham540]

Hi, Predicting compressive strength using rebound Hammer is right method? Or we can use only for the surface hardness.

[@structuralanalysisanddesign]

Core cutter test will best to determine compressive strength

[@adityakumarroyal7138]

SIR IT SHALL NOT BE ON SAME POINT IT HAS DONE AT DIFFERENT POINT @20MM SPACING

[@civilsiteeducation6207]

Dear, It is only a practical demonstration to learn.

[@ravijangra9717]

Sir aisa hi video ek ultra Sonic Plus velocity pr b bna do plz

[@structuralanalysisanddesign]

Jaroor try karunga

[@sharadabikkannawar9087]

I love u... Sir... I need guidance to excel... A site engineer and open my own firm...

[@structuralanalysisanddesign]

Thank you for your love, keep hardworking and you will achieve success

[@faisalsaeed3634]

Boss ye app ne horizontal test kia? To graph kese select krenge K teeno me se konsa consider krna hai

[@structuralanalysisanddesign]

Aap dhyan se dekhiye video mai maine kaha hai kaun si line dekhni hai graph mai, graph mai indication hai horizontal and vertical

[@ConstructionTechandVlogging]

Aree boss tum aatcha dekha nahi Hain Kya? Graph me konsa Lena Hain aatcha bola Hain video me.

[@NaveedKhan-wc4zd]

What is the cost of this hammer ?

[@rahulpatil-hx1pu]

Is it necessary to take the 6 readings on the same point .can we take the 6 readings on different 6 Points

[@structuralanalysisanddesign]

Its to be taken at 6 different points

[@rahulpatil-hx1pu]

Thanks for Guidence

[@shubhamumbarani6996]

Q. how we calibrate if the rebound hammer is not showing correct result ?

[@structuralanalysisanddesign]

If you want to check whether rebound is giving correct answer or no just do rebound hammer test on on a standard concrete block and note down the value and than same cube you test in compression testing machine and compare the values, if you getting different value with rebound hammer just consult the technician who is allowed to check the rebound hammer
Here is a link how to operate digital compression testing machine th-cam.com/video/QR7ttm5tr4o/w-d-xo.html

[@shubhamumbarani6996]

if there is nigligible difference between both result then what should we do ? Do we requried to calibrate it or not ?

[@shubhamumbarani6996]

Can we calibrate an instrument without a technician??

[@structuralanalysisanddesign]

If it is negligible no need to calibrate, if the results vary too much than calibration is needed, 10% variation can be accepted

[@structuralanalysisanddesign]

No, it is strictly advised to calibrate the instrument with the certified technician only

[@sachinmeshram9710]

How much price rebound hammer

[@structuralanalysisanddesign]

just contact with vendor, price varies with company, google for more information

[@tanweerabbas6628]

I want the info of the graph

[@structuralanalysisanddesign]

Graph already shown in video Tanweer

[@tanweerabbas6628]

@@structuralanalysisanddesign nh graphical prove how this graph done

[@toufikachour4687]

the value equivalent to 26 is 21, not 18

[@randhawa2524]

Hlo sir

[@kaveenmadushkaisuru2832]

its not calibrated

[@mav5204]

26 is poor concrete probably due to plaster giving false reading

[@shahbaazkhan4978]

Sir vertically upward or downward kr liye Kya correction use karte hai please explain with example ?

[@structuralanalysisanddesign]

The chart which will be there on rebound hammer is having 3 curves, it is explained in detail in video please go through video completely