Waste ballast must be used in ballast renewal work to effectively use resources. Since the particles of waste ballast are abraded under cyclic train loads for a long period, however they do not necessarily have the same strength or deformation characteristic as those of new ballast. In order to clarify the strength and deformation properties of ballast in the process where ballast particles are abraded, therefore we performed triaxial compression tests with a large specimen and cyclic loading tests with a large-scale track model by using abraded ballast particles. As a result, we found that the strength and rigidity of ballast decrease and the settlement of ballasted track by cyclic loads increase as the ballast particles are abraded.

Copyright (c) 2002 Railway Technical Research Institute