You need to allow the dispersion agent more contact time with the material to ensure the individual grains of the material don't stick together. I believe per ASTM, there should be a 1hr pre-soak, however for educational purposes, 15min will work. You should not dump the agent in with the sample and go directly to the blender step.
@bitsandbobsfromthe7blobs629
3 жыл бұрын
Can confirm.
@user-oc4gu9kb3p
3 жыл бұрын
k is not a constant, it depend upon the specific gravity of the soil and the temperature of the suspension and the liquid's viscosity. The origin of the equation is D = sqrt(30n/980(G-g) * L/t) Where :- n = viscosity value. G = specific gravity of the soil. g = specific gravity of the liquid.
@Luffz
Жыл бұрын
SHAGGY??!?!
@derekguidry9032
6 жыл бұрын
my grandmother made awesome malts with that machine, its probably 100 years old.
@user-dw4tr5ll1x
3 жыл бұрын
이 동영상은 도움이 되었다 나에게 많이
@niroshandavid
3 жыл бұрын
But the standerd dosen't say to use a glove... its talking a stopper... if the particals passed throgh the glowe, then how u recover ot?
@sadigahmed55
2 жыл бұрын
Yes robber stopper
@morrelebissa5573
6 жыл бұрын
After mixing the air-dried soil with the prepared reagents solution do we absolutely need to pour them through a sieve again? I have read in one document where after using air-dried soil through a 2-mm sieve and for the determination of clay and silt, the suspension was not transferred through a sieve again only for the determination of sand where sand was transferred through a 50 um sieve. Will we lay down the hydrometer and temperature at the same time? When we let stay overnight the prepared solution, do blank treatment needs too? Can we adjust the temperature? If we need 20 degree Celsius and our thermometer is graduated till 30 degree in this case what can we do?
@Amccarrol
2 жыл бұрын
For anyone who may be watching this for educational purposes: Not all hydrometers read from the bottom of the meniscus. I work in a soil testing lab and ours reads from the top. If you are not sure which one yours reads at then you can put it in distilled water and it will read 1.0 at the correct part of the meniscus.
@user-pq3ux4yg2p
Жыл бұрын
Perfect
@trongsarkayta
Жыл бұрын
hydrometer cannot be read from bottom meniscus since solution is muddy. we have to take top readings only in this case
@morrelebissa5573
6 жыл бұрын
Can we do all of the test without electric stirrer and correction? Using an iron stirrer instead of electric stirrer and use an alternative procedure that make sure we do not need any corrections.
@civilengineeringexpert2539
5 жыл бұрын
Nice sir
@timyoldtoenerdland6633
4 жыл бұрын
please how did he calculate the percentage passing #200 in equation 3
@johnfetterolf87
4 жыл бұрын
PT in this equation (#3) is the Percent of the Total sample used in this Hydrometer Analysis (around 50g in this video). The material used in this analysis came from the material that passed the #200 sieve in the shaker portion of the gradation test, but is not necessarily all of that material.
@akashdeb7295
3 жыл бұрын
Very nice
@RatnaYesu
3 жыл бұрын
Thanks
@abeneazeralemayehu212
4 жыл бұрын
are these procedures work for a double hydrometer test that is used for dispersive soil?
@shimaaothman1081
5 жыл бұрын
god bless your effort
@SangeenKhan796
3 жыл бұрын
This is very helpful, thanks for uploading
@RatnaYesu
3 жыл бұрын
Glad it was helpful!
@KeldSoele
5 жыл бұрын
Great walk-through! What is the corrected length? Is it some arbitrary value, or does it relate to the hydrometer above mixture? Or some third option... 🙄
@johnfetterolf87
4 жыл бұрын
Generally, the corrected length is the distance from the 0 mark to the meniscus + the meniscus distance to the surface.
@wissam9235
5 жыл бұрын
This was very helpful, thank you very much.
@morrelebissa5573
6 жыл бұрын
Taking reading at different times (15 seconds, 30, 60,...), which value should be considered for the Hydrometer (41, 36, 32)?
@user-om2wh5jp3d
4 жыл бұрын
Thank you Very good
@morrelebissa5573
6 жыл бұрын
Hi, could you show us different Hydrometer with different scales and different calculation how to determine percentages of clay, silt and sand? Could we operate with the Hydrometer without thermometer, Fahrenheit?
@NarkhanimRzayeva
3 ай бұрын
awesome, thanks a lot💖
@mosab1340
4 жыл бұрын
Thank you 🙏🏼
@palebluedot8733
2 жыл бұрын
Nothing lasts forever and u know hydrometers can break, ohhhh yeah
@ruqayahmuhammad1799
6 жыл бұрын
thank you very much you really help me
@ratuldas3408
5 жыл бұрын
Thnx ...can u upload the table
@chinmayabehera7399
6 жыл бұрын
thank you scientists. method of demonstration is very nice.............
@goldenfingerz6151
2 жыл бұрын
why don't you record the temperature of soil solution by thermometer in the measuring glass before you drop the hydrometer down into it? I think the temperature is very significant factor to determine the calculation result
@puspenduroychowdhury4534
5 жыл бұрын
Is corrected length and effective depth (He) same?
@amarpun3388
4 жыл бұрын
How to take a
@barkathussain5397
6 жыл бұрын
Thank you very much.dear sir
@learnallthings3695
5 жыл бұрын
thank you very much
@rishimeena118
2 жыл бұрын
Thanks for your support sir 😐
@daynaislam4876
9 ай бұрын
You didn’t washo out the cup remaing soil sllury
@vev1989
4 жыл бұрын
Thank a lot buddy
@RatnaYesu
3 жыл бұрын
You're welcome!
@sakshamsingh9687
Жыл бұрын
much appreciated
@winniemalunga1141
Жыл бұрын
Thank you
@sarat5448
7 жыл бұрын
Nice job guys!
@RatnaYesu
3 жыл бұрын
Thank you
@m.m1048
5 жыл бұрын
Hi you don't need to take a temperature every hydrometer reading?
@KeldSoele
5 жыл бұрын
For some of the later readings, several hours apart, it's important to make sure the lab temperature is the same, or corrected values should be used.
@alexboor7716
Жыл бұрын
I think your math is a bit off for finding D.... can you go over it....
@niroshandavid
3 жыл бұрын
Bs 933-8?
@devvv4616
6 жыл бұрын
THANKS SO MUCHH!
@chahidy2218
5 жыл бұрын
Greaaaaaaaaaaaaaat thank you very much
@moutasemnawaf
6 жыл бұрын
how can i contact with this guy ? and thank you alot
@arunverma8314
6 жыл бұрын
print kaisa h ye yr
@trongsarkayta
Жыл бұрын
What is the ratio of dispersing solution?
@trongsarkayta
Жыл бұрын
And why are you not cleaning all the mud particles from the grinding container with distill water?
@morrelebissa5573
6 жыл бұрын
What is dispersing agent? Is it a reagent?
@scottriggins7167
6 жыл бұрын
It is something like sodium hexametaphospate
@niranjanrao183
6 жыл бұрын
NaPO3 4% 125ml
@vinayagampari5610
5 жыл бұрын
33g of sodium hexameta phosphate +7g of sodium carbonate
@bilalmaishanu2338
3 жыл бұрын
Please which standard is this
@RatnaYesu
3 жыл бұрын
ASTM
@harshvardhansingh7191
6 жыл бұрын
Voice problem
@PHUANGNGOC
Жыл бұрын
What is a #200 siv?
@hasamuddinhazin578
3 жыл бұрын
Missing some steps
@N8Dulcimer
3 ай бұрын
Several key errors in this video. Do not trust this if you are learning to perform this test at work.
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