1. Oven dry aggregate passing 12.5mm IS sieve and retained on 10mm IS sieve are selected for the test. 2. The cylindrical measure is filled by the sample aggregates in three layers approximately equal depth and each layer being tamped 25 times by the rounded end of the tamping rod. 3. After tamping the third layer, the top surface is leveled using the tamping rod as straight edge. The test sample thus takes weight as W1 gms. 4. The cup of the test apparatus is placed in position on the base plate, the test sample is transferred into the cylinder in single layer being tamped 25 times and the surface of the aggregate is leveled. 5. The hammer is raised until its lower face is 38mm above the upper surface of the aggregate in the cup, and allowed to fall freely on aggregates for 15 times at an interval of one second. 6. The crushed aggregate is then removed from the cup and the whole of it is sieve on the 2.36mm IS sieve until no further significant amount passes. The fraction passing the sieve is weighed accurate to 0.1gm. and noted as W2 gm.

Apparatus 1. Weighting Machine 2. Pan 3. Tamping Rod of 10 mm 4. Calibrating Cylinder 5. Impact Mould 6. Sieve of 12 mm 7. Sieve of 10 mm

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Love you sir, your video is very helpful sir.

Very well explained thumbs up brother

Thank you sir such a nice explanation

Thank you sir explained very nicely

This video is really helpfull....

Best quality video sir.

Sir your video is very good. I learn aggregate crushing , impact value. But i cant find the loss angles abrasion value of coarse aggregate. Plzz suggest

Sir so good explanation upload more videos on ce lab

nyc vedio sir....thank you

Thank you

Sir thanks aggregate impact value And aggregate crushed value which one the pest practical for road traffic impact

Thank u sir

Thank you sir...

Jazakallah

thank you sir

Good sir

Nice

Very nice sir

Because You take the sample from practical field

Shandar

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spr

Sir,please off the fan for more accurate weight reading

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What is the relationship between impact value and toughness I mean what will happen to aggregate if impact value is high or low???

Sir it is good but you don't mention the dimensions and hight of the 15 blow's is not mentioned hight don't rept the sir

Sir adhi 10mm kadu 10CM

It's good

Why we take 10mm only

Which is code???

we are giving 15 blows why should we give only 15 blows why should not give 20 blows

Tell me the is codes

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Nice

Nice

Nice