Chapter 1 Soils Tex116E, Ball Mill Method for
The result of this test is known as the Wet Ball Mill (WBM) value. Apparatus The following apparatus is required: wet ball mill machine, consisting of a watertight steel cylinder, closed at one end, with inside dimensions of #177; 3 mm ( #177; 1/8 in.) in diameter and #177; 3 mm ( #177; 1/8 in.) in length.