density of crushed stone ballast used in railway tracks
Jun 16, 2015 ... nut used, shall be new, and shall conform to Chapter 4, Part 3.6 of AREMA. ... Ballast utilized for track constructed with 136 RE rail ... Subballast shall be crushed gravel or crushed stone with a minimum 75% of the material having two ..... Each lift of subballast shall be compacted to a density of not less than. Chat Now