FE Exam Geotechnical - Relative Compaction (Sand Cone Test)
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- เผยแพร่เมื่อ 12 ต.ค. 2024
- In this video, we calculate the relative compaction for a given soil. I think this question is a bit long for the FE exam, but I just want to make sure you are ready to tackle all type of problems. Now also, this problem is important if you are taking soil mechanics class.
Like I promised on the previous video, this is the last video we are going to cover in phase relationships! Next time we do something on Geotechnical, it is going to be FOUNDATIONS! Exciting 🤣😂
And don't forget, a problem a day, keeps the "F" away!
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RESOURCES & LINKS MENTIONED IN THIS VIDEO:
FE Civil Practice Exam NCEES:
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FE Civil Review Manual (Latest edition):
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FE Civil Practice (Latest edition):
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FE Civil Review Manual (Oldest edition):
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FE Civil Practice Problems (Oldest edition):
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FE Review Manual (Other Disciplines):
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Fundamentals of Geotechnical Engineering
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Principles of Foundation Engineering
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TI-36X Pro:
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TI-36X Pro calculator case:
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Please keep these problem a day series coming. Am watching every single one of them. Extremely helpful!! Something unique about the way you explain/simplify things.. Thank you!!! Looking forward to tomorrow's videos.
Thank you 😊 I am glad I can help! Good luck on your test and keep up the good work, it will be worthy at the end of the day!
Hello Dweller, I just want to let you know that I am still doing the "Problem a day series" on Patreon, www.patreon.com/enGENIEer, in case you want to check it out. You can also ask me what kind of questions you would like to see next on patreon. There are already two questions that I have posted so far exclusively for my patreon supporters. I hope you enjoy it, thank you 😊 and good luck!
Thank you Genie! Greatly needed.
It Is confusing when they call it "max dry density" but it is actually "max dry unit weight". At first I thought the 118.16lb/ft^3 was row, but it is actually gamma.
Density is mass per volume. Unit weight is force per volume. Pound-force is equal to pound-mass where the gravity is equal to 1g of gravity. So if you are working in metric units the difference between density and unit weight will be a factor of gravity. But in U.S. units lb-m/ft^3 is equal to lb-f/m^3. So they are pretty much interchangeable.
ncees pe hb 1.1, p. 141, 154.
isn't the Ws --- the weight of solids? should't that be dry weight of the soils instead of the total weight of the soil?
You didn't provided the weight of the sand occupied in the cone. This should be known. And then only, we can determine the weight of the sand that filled the hole.
you are missing the weight of sand in the cone by itself, you need to subtract this from the difference between the weight before and after filling the hole
The difference between the weights of cone apparatus before and after the digging and the filling of the hole gives you the weight of sand used to fill the hole to determine the volume using the dry unit weight of sand. I do not see where the solution of the problem is not correct. Engineer Mohammad.
@marcomelendez5230 But the sand inside the cone does not fill the hole, it stays above the hole, therefore that part of the weight should not be used to calculate the volume of the hole.
This problem is now outdated
Many Departments of Transportation require sand cones. The frequency is much less than that of nuclear density/moisture gauge tests, but still required.
why?