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  1. briansmithak

    AASHTO R58

    I have another thread on the forum dealing with my issues testing a bentonite mix. The questions are sort of linked. The Federal lab that is also doing plasticity indexes on the material are getting huge numbers. My numbers average 8. Another lab is getting around 10. The Fed lab averages 14...
  2. briansmithak

    Bentonite mix testing using Atterbergs.

    I am currently testing surface coarse material for a road in Montana. The original material to be used had no PI. It was decided to add bentonite to give the material a PI of up to 7 +-3. Everyone who tests this material gets different answers ranging from 0 to 16. This is the first time I am...
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