How is the current liquefaction analysis interpreted?
If you have a fine grained soil (50%+ passing #200) with a PI < 12, and Wc greater than 85% LL than it will behave like a sand, and is therefore liquefiable. Got it.
But if you have a clayey sand (or silty sand with say, passing #200 = 45%, is it then considered a sand, or sand-like, and therefore liquefiable. What if the 45 percent is montmorillinite, it will NOT liquefy.
Will a sand liquefy with 45 % montmorillinite? I don't think so.
Can you run a PI on sand if it all passes the #40 sieve? Why not, but then how would you classify it on the Cassgrande Chart when it only references CL, CH, Ml, MH, etc.? Maybe classify it as a clayey sand, plastic fines?? sounds a bit crazy.