TY  - JOUR
PY  - 1985//
TI  - Research on railroad ballast specification and evaluation
JO  - Transportation research record
A1  - Raymond, Gerald P.
SP  - 1
EP  - 8
VL  - 1006
IS  - 
N2  - Research leading to recommended procedures for ballast selection and grading are presented. The ballast selection procedure is also presented and offers a sequential screening process to eliminate undesirable materials. The procedure classifies the surviving ballasts in terms of annual gross tonnage based on 30 tonne (33 ton) axle loading and American Railway Engineering Association grading No. 4. The effect of grading variation and its effect on track performance is also presented.    Record URL:   http://onlinepubs.trb.org/Onlinepubs/trr/1985/1006/1006-001.pdf<p /> <p>Language: en</p>
LA  - en
SN  - 0361-1981
UR  - http://dx.doi.org/
ID  - ref1
ER  -