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Thread: Particle Size Distribution

  1. #1
    Associate Engineer
    Join Date
    Nov 2012

    Particle Size Distribution

    Hi All,
    Hoping someone here can help - I'm just completing a question on a Soil Mechanics assignment (last one for the year!!) and I'm having some trouble with the Particle Size Distribution component. Basically I've plotted my percent passing on a log graph, but according to my figures the amount passing the .075u sieve is greater than 10%. There are no results supplied for a hydrometer (?) test either... Now when I'm trying to work out Cc and Cu I don't have a figure that correlates for D10. What should I do in this situation - simply plot the graph without working out Cc and Cu? The overall question relates to classifying a soil and there are Liquid Limit, Plastic Limit & Compaction & CBR results, so I think I can classify it without.... Any help would be really appreciated!

  2. #2
    Principle Engineer
    Join Date
    Mar 2011
    Well,in the absence of D10, in this case, you can only say that
    and use the equations for Cc and Cu getting inequalities like
    etc for Cc

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