Transcription of CHAPTER 7 CORRECTING DENSITY TESTS FOR …
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CHAPTER 7 CORRECTING DENSITY TESTS FOR …
7-12012 golden rule of compaction testing is: The proctor used to calculate percent DENSITY must match the soil being tested. This fact is restated here because it is the single factor why plus 4 corrections are states when soil materials contain 10% or more material retained on the No. 4 sieve (3 or more dime size stones), it is necessary to correct the proctor results which are calculated on the minus 4 portion of the material. Basically, this is why: Rocks are heavier than soil. This sounds pretty simple, but this simple fact actually sets up a fairly complex relationship when +4 material is present in a is worth noting here the difference between the presence of +4 material and a rock fi ll.
2012 v1.0 7-1 A “golden rule ” of compaction testing is: The proctor used to calculate percent density must match the soil being tested.This fact is restated here because it is the single factor why plus 4 corrections are necessary.
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