| Granular Sub Base proctor compaction Test | Maximum Dry Density test For GSB | Lab Density Test |

#Granular Sub Base Proctor compaction test
IS:2720 part 8
#Maximum Dry Deary test
#Lab density test Heavy Compactiion
Equipment - Sieve 26.5mm,4.75mm
Mould 12.73Cm with 6Cm. coller and 150dia,2250cc volume
Rammer - 4.89kg
40kg GSB Sample
Spatula
Oven
Container
Proctor Compaction Test For Granular Sub Base
Procedure-
Take about 40 kg of air-dried GSB material Sieve it through 26.5mm and 4.7mm sieve.
Calculate the percentage retained on 26.5mm sieve and 4.75mm sieve, and the percentage passing 4.75mm sieve.
Mix the GSB material retained on 4.75mm sieve and that passing 4.75mm sieve in proportions determined in step (2) to obtain about 25 to 30 kg of sspecimen.
Clean and dry the mould and the base plate. Grease them lightly.
Weigh the mould with the base plate to the nearest 1 gram.
Take about 6 kg of Granular specimen. Add water to it to bring the water content to about 3% .
Keep the GSB in an air-tight container for about 18 to 20 hours for maturing. Mix the GSB thoroughly. Divide the processed soil into 5 to 6 parts
Attach the collar to the mould. Place the mould on a solid base.
Take about 6kg of the processed GSB sample and hence place it in the mould in 5 equal layers. Take about one-third the quantity first, and compact it by giving 56 blows of the rammer. The blows should be uniformly distributed over the surface of each layer.
1st layer in mould is compacted by giving 56 blows with 4.89 kg weight Rammer.after completion of 56 blows to 1st layer, placed 2nd and compacted it with 56 blows with same Rammer, then 3rd layer compacted with 56 blows , 4th compacted with 56 blows and finally 5th layer compacted by 56 blows. all five layer in mould is placed and compacted.The height of fall of Rammed is 45cm.
The amount of the GSB material used should be just sufficient to fill the mould ad leaving about 5 mm above the top of the mould to be struck off when the collar is removed.
Remove the collar and trim off the excess GSB sample projecting above the mould using a straight edge.
Clean the base plate and the mould from outside. Weigh it to the nearest gram.
Remove the GSB samples from the mould.
Take the Fine material from samples for the water content determination from the top, middle and bottom portions. Determine the water content.
Add about 4% of the water to a fresh portion of the processed GSB samples , and repeat the steps as above like 1st mould casting.
- The same procedure is repeated with fresh processed sample for 3rd Mould add 4%of water and in the 4th mould add 5% of water or in the 5th mould add 6% of water whatever we have required the procedure is continue for next only in each sample mould casting moisture content will be increase by 1% of previous mould .
- For each casted sample is weigh it and noted. initially weight is increasing in 2nd, 3rd,4th and after increasing water content we find that the 5th casted Mould weight is decreased.
Calculation -
Volume of Mould -
Diameter of Mould -
Hight of Mould -
Results -
Plot the graph
1 x-axis Water content
2. Y - axis Dry Density
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[@bandanakumari6106]

much informative keep it up

[@skGamer-xs6mn]

informative video

[@joy22july]

26.4 ki sieve se retain galat hai

[@happening2023]

please show us the grpah of gsb compaction

[@basavarajutotad4615]

Gsb proctor karna sir merko kousa sieve lena

[@rajneshyadav7255]

Sir ji gsb ka cbr casting or batayiye na please sir ji

[@nomadprs]

Sure jaldi hi CBR post karunga

[@rajneshyadav7255]

​@@nomadprs sir replace system samajh nahi aa raha

[@KPGupta-fu9wf]

GSB ke liye 26.5 sieve ye kaha par h reference kya h sir

[@nomadprs]

Please see the description given

[@rameshsharma-wg3sw]

6:14

[@trongsarkayta]

You did not explain or show clearly how the materials passing through 26mm and retain on 4.75mm and retain on pan adjustment is done for the final sample for compaction test.

[@birendramishra5676]

sir sieve gsb ki kya hy

[@nomadprs]

Please MORTH section 400 table 400-2

[@dineshahlawat5001]

Sieve wrong showing

[@nomadprs]

Sieve is showing as per IS 2720

[@birendramishra5676]

ap btaiye sieve

[@saratchandrabiswal5548]

37.5 passing 4.74Retained

[@dineshahlawat5001]

And also Blows Wrong

[@nomadprs]

What wrong

[@dineshahlawat5001]

Sieve wrong Showing is code -2720 -8 Sieve using 37.5 Passing Retained

[@nomadprs]

All test as per IS 2720

[@dheerajsinghbisht2804]

You are right sir

[@joy22july]

Galat process hai har bar 2% badta hai

[@rahulkumardubey9555]

Jab kuch nahi aata e kyo video. Banate ho

[@nomadprs]

Mujhe jitna aata tha maine banaya, jyda jankari ke liye Books padho.

[@birendramishra5676]

ap btaiye sieve kis is code me diya hua hy 37.5 ke alawa

[@ijazarif245]

You are doing well work.i am new frien d here.u must be com e at my sweet home