I work for a Civil Engineering Firm and we have been hired to take density tests on Run of Mine Salt. We have prepared a Modified Proctor (ASTM D 1557) of the salt, very wierd plot. We are currently trying to figure out how to take densities on the material. We don't know if the gauge will work properly in the salt. We've considered sand cones but we concerned we may loose sand in the void space between salt grains. We are concerned the salt is too angular for the balloon method. We have considered coring through the pad to have a clean hole but we may have collapse when the salt is not confined. Any ideas are appreciated.
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