Chapter 2 Example 1 - Particle size distribution curve

Chapter 2 Origin of Soil and Grain Size
Textbook: Principles of Geotechnical Engineering (9th Edition). Braja M. Das, Khaled Sobhan, Cengage learning, 2018.
Chapter-by-Chapter Playlists (including all videos)
Chapter 2 - Origin of Soil and Grain Size
• Chapter 2 Origin of So...
Chapter 3 - Weight-Volume Relationships
• Chapter 3 Weight-Volum...
Chapter 4 - Plasticity and Structure of Soil
• Chapter 4 Plasticity a...
Chapter 5 - Classification of Soil
• Chapter 5 Classificati...
Chapter 6 - Soil Compaction
• Chapter 6 Soil Compact...
Chapter 7 - Permeability
• Chapter 7 Permeability...
Chapter 8 - Seepage
• Chapter 8 Seepage (Geo...
Chapter 9 - In situ Stresses
• Chapter 9 In Situ Stre...
Chapter 10 - Stresses in a Soil Mass
• Chapter 10 Stresses in...
Chapter 11 - Compressibility of Soil
• Chapter 11 Compressibi...
Chapter 12 - Shear Strength of Soil
• Chapter 12 Shear Stren...
#ParticleSizeDistribution#USCS#GeotechnicalEngineering

[@Mhdawi7]

Thanks for making the reading of x-axis values more complicated to me 😅 Because you mentioned the values directly without showing how to read it ( which exactly why am watching this video )

[@gerrysandusky977]

thank you for explaining how you got your x values, great teaching lesson!!

[@matthewcharles9829]

How do you think it’s possible to consider all the different particles size for instance, D10, D50, D95 to account for polydispersity instead of monodisperse particles in a said experiment?

[@injinir]

Thank you so much I finally get it since I'm behind in our topic in Geotechnical.

[@raymunddylanbadua8748]

injinir kana ba ngayon teh

[@sanchanasandaruwan5384]

Thank youu sir💖

[@kjono4611]

What do you do if you don't have a D10 value on the curve? In the example I'm using, 27% of the soil ends up in the pan, so the final plotted point is also at 27% finer.

[@Tshepoification]

are you able to get D10, D30 and D60 automatically using excel?

[@alijimenez7174]

Hi! Where did the final values for the sieve opening (x-axis column of values) come from? Before you extracted x and y to be plotted on the chart you had different values. How did you come up with 4.75, 2.00, 0.850, 0.425, 0.250, 0.150, and 0.075? thank you!

[@uSeeGeo]

Each sieve used in the sieve analysis has a corresponding fixed opening size. Those x values are the sieve opening sizes, which are the particle sizes. This video includes the sieve number and the corresponding size table (starting 10:30): kzbin.info/www/bejne/kIepiKxpl6eXgZY

[@izhan_ijr5139]

how to calculate Cu and Cc if maximum percentage finer just 27.5% finer, if not mistaken to calculate Cu and Cc, first we need to find D60,30,10 but in data the maximum % finer just 27.5%?

[@johnkevintorrazo2611]

Can we use interpolation to find D10, D30, D60? Using Sieve Opening and Percent Finer.

[@uSeeGeo]

In this example, the PSD curve was created by connecting adjacent data points. So, you can use interpolation to find those values. Generally, you should directly read those values from the axis.

[@peincake]

how do you identify the value of the location of the D10,D30,D60?

[@uSeeGeo]

These are read directly from the x-axis. I may upload a video on how to read values from a log-scale axis, but very briefly, the mid point between point a and point b on a log-scale axis has a value of square root of (a*b).

[@sharmajisuccess3492]

How to calculate the exact values of D10,D30,D60 in any numerical ?? In the numerical which is understood by you, it is not clear. (Please reply must)

[@uSeeGeo]

One typically reads those values from the x-axis, i.e., they are not calculated. Alternatively, one can interpolate adjacent data points to get those values.

[@me-uma]

The teacher asked me to find the average size of the particles by this area under the curve