Why we use cube for strength Test instead of cylindrical | Interview Question
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#civilengineeringbasic #Practicaltraining #siteengineerTips - วิทยาศาสตร์และเทคโนโลยี
Great job sir mene lockdown me aap ke 80% video dek dale or site ka bhi knowledge or experience mil gaya 🙏😊
Bro can u explain about standard deviation of cube ka topic I sm getting lot of confusion
Cylender strength is equal to 0.80 to 0.85 of Cube strength.
matlab hamesha cylender ki strength cube strength se km hoti h...
Cylinder strength is 0.8 times of cube strength means cylinder is having 80percent of that cube strength but in this video u said opposite . But anyway thanks for sharing information.
I think cube's strength is higher than cylinder's strength that why cube is 1.25 times of cylinder's bt he is saying that cylinder's strength is higher than cube bcos of increase length less frictional effect ...so confusing can u crearify this topic bro
@@himanshprajapati3679 cube strength is greater than cylinder strength .... yes in this video he said wrong . cube strength is 0.8 times higher than cylindrical strength
if u see european standard of concrete grades their written in clear . for e.g c30/37 , so c30 is cylinder which is equal to c37 cube strength .
@@harisabbasi5447 Bhai civil ssc je ki preparation kar rahe ho
No problem bro
thanx for information
kya topic liya hai sir maza agaya best
keep it up
👍well explained sir
Thanks keep watching n saring
Plz one bbs of rcc and psc girder with full details
Uska kriteria. Kya he
Concrete cube ki strength cylinder ki strength se kitnee percent ziada rakhte hain kindly ACI II AASHTO yah ASTM se bAtye kindl
tnx sir 👌👌👌
Sir which code book mentioned the concrete cubes compressive strength .7 days 75%, 14 days .90%,28 days 99%.
There is no code. Code only 28 days strengh fck +.825*standard deviation( as per IS code)
Mean M25 tabhi pass hoga avg 29 ayega.
Sir i have a doubt on this vedio ..sir you have compare between cube and cylinder for getting best result of conpressive strentg ..sir we know that fck cylinder is equal to 0.8fck cube. 20% decrease in compressive strenght in cylinder with compare to cube.bcz of slenderness ratio of both shape.
yes yu r right ....i speak wrong in flow sorry for that
@@civilsitevisit its ok..
Can I have ur num?
Dil ki Awaaz
Good one himanshu.. 👌
Thanks brother
Keep watching
Thank you bhaiya.....
Keep watching n share
Thanks
Keep watching brother
Area badhane men to problem h lekin agr area kam kiya to...100mmx100mmx100mm...tab to force kam chiye hoga....to ye ku ni use kr skte
M20 =230 kyo le rahe h sir
Sir cube fitting kese hoga sir
Cube fitting brother ????
Sir ji apne ak bhi topic ko clearly nhi samchaya
Than why cubes are majory used for const. Work
And If we use cylinder than it's exact comp. Strength doesn't carried out.
Than how you said that it's Good.
You easily get cylinder compression result perfect as compared to cube
And we use cubes bcz itz formwork available easily n small waste of concrete n many more things
@@civilsitevisit But in IS CODE 456-2000(P.no- 29 or 31)
only said about cubes.
Yes IS said 150*150 cube should use but according practically cylinder cube give best result because of no friction v
M 20 ke liye 230kyo lege
My question is when cylindrical specimen and 100 mm cube give better result then why we don’t use them,
Simple. The code says us if u are using 20mm Agg we have to use 150 mm cube. If Agg size is less than 19mm we should use 100 mm cube.
Since most of our construction we use 20mm agg , so we use 150 mm cube only. #CIVILBRAINS
Why is not used 100mm cube. I don't understand
30*30*230= 207 kn easily ho jayega
Sir 230 kya hai??
Brother ...m20 liya ....hai 28 din bhad 23 kn/mm2 strength hoyegi ....edar ap 200 b le sakte ho jetna grafe houga utna he m 30 houga 300
Hello sir can you add subtitles or add English version of it..please Thanks
Ok ofcourse brother i will add subtitles in my upcoming videos
@@civilsitevisit Thanks
cylinder strength is less than cube strength, ratio factor is 0.8 percent cylinder /cube .you define it is appropriate test of cylinder specimen. but when you will multiply any number to 0.8% it will decrease own value so that value will decrease in cylinder insist of increase. other point is welly explained .
Sir standard 150*150 hi kyu hai 100*100 bhi to le skte thai standard
shayad video ni dekhi apne usme btaya huya hai mene
10cm cube acche yaa 15cm.cube ?
15
What is the relation of coarse aggregate with th cube size ?
230 nhi 2.3 aaye ga sir
Bhai cylendrical strength =0.85cube strength
To cylendrical strength jada kese aagye
Commonsence h
cylinder strength is0.8 times cube strength....... it means strength of cylinder will be less than that of cube. U told otherwise.
Among 15x15cm and 10x10cm which cubes gives more strength
15*15cm is less strength compare to 10*10cm
Last me utla bta diye h
Cube is more strong then cylinder
No sir ,2000kn ka use hota hai
Sir 100x100 cube is more strength why does not use it
bcz for that you need machine that have more strength to break the cube n ...machine is so big n costly
Sir which is best square and circular I have a doubt please clarify my doubt
@@vkvivek1633 😅😅
Because smaller size cubes fail very quickly. The normal time for performing the test is 10min. If time taken is less than 10minutes more strength will be shown. You can opt smaller size cubes for compression test but then you should change the FOS value proportionately. For this reason BIS publishes IS codes so that a standard practice will be adopted throughout the country. If they are not followed and if the structure fails due to improper design then the engineer will be held responsible for not following the IS code.
Thanks Sir...
But why we test cube after 28 days???
Why we can not test cube on 29 days, 30 days, 31 days...
I know after 28days cube achieve 99.9% strength...
Laikin ye kaise pta Laga ki after 28 days cube 99.9% strength achieve kr leta hai..
Yes lab test se brother
Video soon on it
The simple answer to this question is just to save time. You can test even after 1 year for better results (infact after 1 year the creep coefficient is reduced by more than half of its 1 month value), but in field no one waits 1 year to occupy a structure after its construction. More often than not the structure will be loaded by the 15th day, but as per IS code it should be loaded after 28th day for best strength. In the end you are doing all these lab tests just to estimate the value that will be achieved on the field.
0.8 times higher strength of cube rather than cylinder , kindly correct u mistake.
Sir, jab cylinders batter result deta hai to hum log cube kyo use karte hai???
easy hota hai
Glt h
Best results to cube hi deta h
Cylinder have .85 time strength of cube
@@nemichandbabal.7533 shayad aap soch rahe honge ki jo result ka numerical value jyada h vo acha result h. Lekin asal m aisa nahi h. Isko aisa samjo....aap M20 concrete tayar kar raha h, aur cube strength 28 days ke baad 19N/mm^2 aaya, aur cylinder strength aata h 15.5N/mm^2. Actual strength cylinder deta h i.e 15.5, but cube ne 19 diya, aur field m aap concrete ka strength 19 maanke construction shuru kiya. Concrete ka strength 15.5 hone ke baad bhi aap 19 maanke construction kar raha h which is overestimating the strength of your concrete which makes your structure weak. Though this effect in the field is compensated by using FOS both for material and load in LSM.
@@k.rajashekarreddy9569 well explained 🙏
Matter is good but unnecessary lengthy explanation
ok brother
🙋
2000kn CTM available in the maximum projects s! Not satisfactory!
Wrong information cube strength is greatee than cylinder strength.
Cube gives strength 1.25 time than cylinder mould.
That part of friction is not failing the specimen, it is infact resisting the failure and that frictional resistance is known as platen restraint which introduces shear stresses at top and bottom and as we move away from the platens this effect reduces. Since the slenderness ratio of cylinder is more this frictional resistance is less and therefore the strength of cylinder is less when compared to cube. You explained it wrong.
👍 right bro
jb friction ka baat aaya to acche se bataya kyun nhi
Bhai ne thoda galat bata diya
yar bhai please ap theoretical video na bnaye....agar cube size inncrease karenge to strength decrease hoti h.....size badha ne pr km load pr vo tut jayega....aur M20 strength kabhi bhi 28 days me 23 n/mm2 nahi a skti
Compressive strengths of cylinders=0.8 x strength of cube, so cylinders give less strength. Your own concepts are bit shaky. And you have completely ignored the slenderness of cylinder
You haven't mentioned why 100mm cubes aren't used in the site. Instead, you have said 100mm size of cubes gives more strength than 150mm size of cubes.
but for 100 mm cube need big machine for test
@@civilsitevisit we do not need a bigger machine for it. It's all about surface area for better accuracy.
@civil site visit
bur you said, for cube of bigger size we need bigger machine.
I asked for a question but you did not replyed!! So, arrogant!! N blocked my messages!!
Sorry for that brother ?? But which one ?
@@civilsitevisit thanks for atleast replying!!
We replied olways
What was your question
@@civilsitevisit , For , G+1 structure, zone5 ,assam. Beam size, column size, footing dimention n bar. Column n beam bar, stirrups n their gap between cc. Also is it good to provide beam bar out of column in both side??
apne to galat bata diya
all calculation mistake
Please delete this video its clearly misleading the concept sir