Sir, jaha se apne core cutting kiya woh toh ek important structure hein...toh core cutting krne ke bad jo hole ban gya usko kya karna sahie? Usko ese hi sor dia jaai ya fir var dia jai....var dia jaie toh uska process kya hein?
Dear jahan per ham log core cutting lete hain vahan per GP2 grouting material aata hai jisko use Karke usko feel Kiya jata hai, uski strength cement concrete ki Eastern se 2 guna hoti hai..
@@rbsinghcivilengineeringaca6777 Thnq you for the information 🙏sir, iss topic ko vi ek video banake smja dijie...toh sabke lie thik rhega... grouting material ka use kese kre...kaha kaha pe kre.. advantage disadvantage sab milake...
Bhai ye test Kuch year baadme karege to jo purna cube ka result aaya thaa phir ohi aayega ya Kuch Kam jyada aayega Aur ye kitne saal ke andar kar sakte hai yaa kabhi bhi?
Core cut karne k baad sabse pehle Hume 48hrs k liye 24 to 30 degree temp pr water me dip karke rakhna padega phir iss procedure ko follow karenge kya sir
Concrete mein core lete samay Steel aata hi hai, but usse jyada koi fark Nahin padta hai, isiliye core lete samay as per Drawing Steel ka spacing check karna jaruri hai.. koshish karte hain jitna kam Steel aaye..
There is no actual reading in the rebound hammer , Actually rebound hammer test results are + - 15 to 30 % fluctuate, So core test better than rebound hammer , And the strength of the core actually comes , Whereas the result of the rebound hammer test does not come actual.. So finally core cutter test better than rebound hammer test..
Sir as we already got strength of cylinder value in CTM machine as 29.56 then why we have to calculate again with load per area formulae.. pls tell? And why we have to compare cylinder strength with cube strength as we know concrete grade and ctm value of our core.
Generally the strength of concrete is in cubicle shape, so the strength to comparison is done by converting cylindrical strength into cubicle shape, Already mention the formula in Is code..
And plss explain how to measure thickness of various layers of road pavement.. how we will know at what time to stop core for each layer. For example if drlc layer is 200mm thick and above it 100mm pqc is there. Our core cutter length is 200mm and I want to measure drlc thickness whose bottom layer is 300mm below. How to measure?
DLC - Dry lean concrete, This is a cement concrete with low slump value to be laid for rigid pavement over sub-base and rolled & compacted by mechanical roller , capacity of roller 08 to 10 ton with vibro roller, With compaction not less than 97% as per morth guideline.
Required strength Nahi mil Rahi hai, is situation mein ek bar designer se consent karna chahie kyunki designer automatic 1.6 time extra lekar chalta, safe load.. aur yadi usmein bhi fail hota hai to fir concrete structure ko todna hi padega ya Fir extra jacketing kar sakte hain..
Dear correction factor 1 hai naki 1.08 , aur strength ke sath multiply kiya jata hai tab ja kar cylindrical strength aati hai.. uske bad ush strength ko cubical strength mein convert Kiya jata hai..
@@visioncivil1143 Good morning dear , As per Sp24 - 1980 , yadi aapke pass graph table nahin hai to aap 100mm ki niche diameter ke sabhi core ko 1.08 ke correction factor se multiply karenge, lekin hamare pass already graph hai aur ham log as per IS code actual diameter of core hai & graph bhi available hai isliye actual correction factor nikalkar multiply karna.., aur yadi hamare pass graph & core ka actual diameter Nahin hota to 1.08 se multiply karte, ok dear very good 👍👍
Very practical knowledge, alot of thank
Very good information helpful and great advice excellent explanation valuable video thanks you God bless you sir jai hind 🇮🇳
what about steel inside, you take still also, so strength had came more....in cube at the time of concrete inside no steel, kindly explain.
Sir, jaha se apne core cutting kiya woh toh ek important structure hein...toh core cutting krne ke bad jo hole ban gya usko kya karna sahie? Usko ese hi sor dia jaai ya fir var dia jai....var dia jaie toh uska process kya hein?
Dear jahan per ham log core cutting lete hain vahan per GP2 grouting material aata hai jisko use Karke usko feel Kiya jata hai, uski strength cement concrete ki Eastern se 2 guna hoti hai..
@@rbsinghcivilengineeringaca6777 Thnq you for the information 🙏sir, iss topic ko vi ek video banake smja dijie...toh sabke lie thik rhega... grouting material ka use kese kre...kaha kaha pe kre.. advantage disadvantage sab milake...
But isme Stirrups Cut nhi hota??
Great post 👌
Arrow kaise draw kiye?
Sir RCC MEMBER SE cutting karte h usme steel bhi to hoti h plz explain kariye
Core cutter koi Girder 10-15 MTR height se fall huva hai to uska result correct mil sakta hai kya?
nice
👍👍👍👍 so nice sir
sir cement treated or lime trrated soil me kyu krte ha kab krte ha plzzz sir ye videoo banyee utube me koi aacha nhi ha plzzz sir sirr plzzz
Very nice
Mr How to make graph of foctor and ration
Please explain graph 📈sir.
AREA CALCULATION GLAT HA SIR
Lekin DIA TO 94 se km nhi hona chahiye as per ASTM C42
Thanks alot 👏👍🙏
Sir cube fail ho gaya hai core me kitna aana chihiye strength... Please help me
Good job sir
🙏🙏🙏
Bhai ye test Kuch year baadme karege to jo purna cube ka result aaya thaa phir ohi aayega ya Kuch Kam jyada aayega Aur ye kitne saal ke andar kar sakte hai yaa kabhi bhi?
Sir apoko call kar sakte apka no. Mil sakta hai
Please send your mobile number 👍
Sir core cutting m strength 9 NM mil rhi h for m 25 concrete after 30 days for slab what should we do in this case please suggest.
Where is dolly of core cutter test?? Kya wo dusra test h
Tcc concrete kyu karte hai site par
I have one doubt mr singh are we passing cylinder cube on comparing 28.28 with 35.48 i.e. cylinder strength and required strength respectively
28.23 KAHA SE AAYA SIR O TO 28.39 HOGA
Sir phese rete kitna rkhte h CTM ka
Best
1.76 h aap 1.67 bol rahe h
you work great sir u great ................... love you from pakistan
Thank you brother 🙏🙏🙏
Core cut karne k baad sabse pehle Hume 48hrs k liye 24 to 30 degree temp pr water me dip karke rakhna padega phir iss procedure ko follow karenge kya sir
Very nice video
Very good video..
🙏🙏
Sir prime coat and tack coat par video bnay full ditels me 🙏🙏🙏💖
Excellent
Nice video sir..
Guru ji ko namaskar 🙏🙏
🙏🙏
Sir core 200mm depth me jayega.....to usme to steel rahega.....to hum 200 mm depth kaise jayenge
Concrete mein core lete samay Steel aata hi hai, but usse jyada koi fark Nahin padta hai, isiliye core lete samay as per Drawing Steel ka spacing check karna jaruri hai.. koshish karte hain jitna kam Steel aaye..
Lekin core lete samay is spacing jarur check karna hai Steel ka as per drawing taki core ke bich mein Steel Na aaye.. 👍👍
Great video sir
Very good
Great job
Sir yadi L/d ratio 2 se jyada aata h to us condition me kya correction factor use krte h
What if my core cut is low but rebound hammer is high?
There is no actual reading in the rebound hammer , Actually rebound hammer test results are + - 15 to 30 % fluctuate, So core test better than rebound hammer , And the strength of the core actually comes , Whereas the result of the rebound hammer test does not come actual..
So finally core cutter test better than rebound hammer test..
@@rbsinghcivilengineeringaca6777 but the problem is cutting core in beam or column is highly not recommended.
Do we have any other test who can give us clear results apart from ultrasound
👍
👌 👌
👌👌👌
Sir not clotting salfar
AS PER MORTH TO 150 MM DIA CORE CHYE NA
Good.exlent.marvelous.
1.76 hai sir..aapne 1.67 read kiya h
It should also be in English
Core cutting ki frequency kya hoti hai
150 cum me 2 core cut karte h
Sir correction factor ki reading knha se li hi kaise?
Sir cc road me kitane Sqmt. me ek test hona chahiye
Sir ji core cutting test ka formate chahiye sir plz
Ok Please send the mail id
Me ,too Sir send the format of test to ynb.nbnscoe@gmail.com
Wating for you response
Thank u ...
very good presentationj
Sir Core ka dia kya liya jata hai.. Fix hai kya..
Per centimetre nhi cm2 hota hai
Good 🙏
Very nice video
Bht bht shukriya sir 🥰🥰🥰🥰🥰
Sir apka lab kaha hai.
Thank You, Sir
Nice video sir
Excellent explanation
Sir as we already got strength of cylinder value in CTM machine as 29.56 then why we have to calculate again with load per area formulae.. pls tell? And why we have to compare cylinder strength with cube strength as we know concrete grade and ctm value of our core.
Already we have fitted the area of core in the CTM machine. How is it calculated? It has been told about this.
@@rbsinghcivilengineeringaca6777 sir we have fitted and core and obtained value reading directly then why again calculation?
Generally the strength of concrete is in cubicle shape, so the strength to comparison is done by converting cylindrical strength into cubicle shape, Already mention the formula in Is code..
only for explain the calculation.
Feed the core area in a digital CTM machine , So that direct strength show in CTM machine display.. ( N/mm2)
Sir ek video mai aap cylender ka lenght dia ka 3 guna bataye the aur isme 2 guna.,🤔
Dear 3D core cutting ke liye hota hai & 2 D testing ke liye..
@@rbsinghcivilengineeringaca6777 thank u sir. 😊
Sir concrete to everyday strength gain karti hai or cube test 28 days mai hota hai to core cutter test kitne din baad karna chahiye
Casting karne ke 14 days ke bad hi..
Minimum no's of days -14 days , not Is code mention but generally 14 days ke bad hi Karna hai.
And plss explain how to measure thickness of various layers of road pavement.. how we will know at what time to stop core for each layer. For example if drlc layer is 200mm thick and above it 100mm pqc is there. Our core cutter length is 200mm and I want to measure drlc thickness whose bottom layer is 300mm below. How to measure?
Plss reply to this also
The minimum core diameter is usually 100 mm but 75 mm and 50mm diameters may be used in special cases, Already core mould available in Quality lab..
We should do the layer wise test and the result is satisfactory after that allow the next layer..
DLC - Dry lean concrete, This is a cement concrete with low slump value to be laid for rigid pavement over sub-base and rolled & compacted by mechanical roller , capacity of roller 08 to 10 ton with vibro roller, With compaction not less than 97% as per morth guideline.
concrete core cutting test and compaction core testing both are difference test method..
Incase core test me bhi fail hogaya toh means concrete ki strength nahi mili toh?
Required strength Nahi mil Rahi hai, is situation mein ek bar designer se consent karna chahie kyunki designer automatic 1.6 time extra lekar chalta, safe load.. aur yadi usmein bhi fail hota hai to fir concrete structure ko todna hi padega ya Fir extra jacketing kar sakte hain..
@@rbsinghcivilengineeringaca6777 thank you sir
Corrrction factor ko sir 1.08 se multipy ku nhi kiya
Dear correction factor 1 hai naki 1.08 , aur strength ke sath multiply kiya jata hai tab ja kar cylindrical strength aati hai.. uske bad ush strength ko cubical strength mein convert Kiya jata hai..
@@rbsinghcivilengineeringaca6777 sir sp 24 1983 mai 1.08 se multiply kiya sir.dia less than 100mm or h/d ratio less than 2.0
@@visioncivil1143 Good morning dear , As per Sp24 - 1980 , yadi aapke pass graph table nahin hai to aap 100mm ki niche diameter ke sabhi core ko 1.08 ke correction factor se multiply karenge, lekin hamare pass already graph hai aur ham log as per IS code actual diameter of core hai & graph bhi available hai isliye actual correction factor nikalkar multiply karna.., aur yadi hamare pass graph & core ka actual diameter Nahin hota to 1.08 se multiply karte, ok dear very good 👍👍