ASTM D 1557 - 09 Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56, 000 ft-lbf/ft3(2, 700 kN-m/m3))

American Society for Testing and Materials (ASTM). Current edition approved Oct. 1, 2009. Published October 2009. 14 p. These test methods cover laboratory compaction methods used to determine the relationship between molding water content and dry unit weight of soils (compaction curve) compacted in a 4- or 6-in. (101.6- or 152.4-mm) diameter mold with a 10.00-lbf. (44.48-N) rammer dropped from a height of 18.00 in. (457.2 mm) producing a compactive effort of 56 000 ft-lbf/ft3 (2700 kN-m/m3).