Effects of Ballast Degradation on Permanent Deformation Behavior from Large-scale Triaxial Tests Qian, Y., E. Tutumluer, Y.M.A. Hashash and J. Ghaboussi. 2014. Effects of Ballast Degradation on Permanent Deformation Behavior from Large-scale Triaxial Tests. In: Proceedings of the 2014 Joint Rail Conference. Colorado Springs, CO. Files Effects of Ballast Degradation on Permanent Deformation Behavior from Large-scale Triaxial Tests - Full Text (PDF) Categories Infrastructure