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Recent content by cme45

  1. cme45

    % Saturation in Expansion Index Test (ASTM 4829)

    This is normally how we do it as well. However, this method is no longer practical (for us) due to the tighter constraints imposed by ASTM. The 48-52% saturation has forced us to sometimes conduct 3-4 trials before we get it right. Since each test requires a min. soak time of @ least 24 hrs...
  2. cme45

    % Saturation in Expansion Index Test (ASTM 4829)

    As of 2008, the % saturation must be 48-52% to be considered a legitimate test as per ASTM, as they no longer allow the use of a correction factor. The % saturation equation has basically two (2) variables (excluding SG), % moisture & dry unit weight. Aside from running a proctor (=extra time...

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