1.1.These methods of tests are for the rapid determination of the maximum density and optimum moisture content of a soil sample utilizing a family of curves and a one-point determination.
1.2.One-point determinations are made by compacting the soil in a mold of a given size with a 2.5-kg (5.5-Ib) rammer dropped from a height of305 mm (12 in.).
Four alternate procedures are provided as follows:
Method A-A 101.6-mm (4-in.) mold; soil material passing a 4.75-mm (No. 4) sieve.
Sections 5 and 6.
Method B-A 152.4-mm (6-in.) mold; soil material passing a 4.75-mm (No. 4) sieve.
Sections 7 and 8.
Method C-A 101.6-mm (4-in.) mold; soil material passing a 19.0-mm (314 in.) sieve.
Sections 9 and 10.
Method D-A 152.4-mm (6-in.) mold; soil material passing a 19.0-mm (314 in.) sieve.
Sections I I and 12.
1.3.The methods described herein correspond to the methods in T 99 and must be chosen accordingly; i.e., when moisture-density relationships as determined by
Method C of T 99 are used to form the family of curves, then Method C described in this procedure must be used for the one-point determination (Note 1).
Note 1-Direct reference to T 99 is made throughout these test methods and most terminology, apparatus and procedures are the same.
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