Why are there crushed stones alongside rail tracks? - QuoraThis is a good question with an interesting answer. The crushed stones are what is known as .. It is called ballast and is basically used to stop the rails and sleepers (ties) moving around. Tamping machines pack the stone in really tight.ballast used in railways,Ballast Properties - Railway Substructure EngineeringSep 8, 2014 . Thus, a wide variety of materials have been used for ballast such as gneiss, granite, basalt, dolomite, line, and slag. Characteristics of the.
ballast used in railways