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ASTM D1557-58t ?

ASTM D1557-58t ?

ASTM D1557-58t ?

(OP)
When the modified proctor came out in 1958 did it require 3 layers or 5 layers when pounding soil into the mold. I know that it is currently 5 layers and has been that way at least since 1970 but I do not have a copy of the original method. I also know that the standard proctor, ASTM D698 is 3 layers.

RE: ASTM D1557-58t ?

I have a reference dated 1963 showing five layers. That's provably the original considering how slow committee of ASTM work.

RE: ASTM D1557-58t ?

(OP)
Thanks for the help oldestguy. I figured this was the case but I just needed to be shure.

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