TY  - JOUR
PY  - 2019//
TI  - Improving damping properties of railway ballast by addition of tire-derived aggregate
JO  - Transportation research record
A1  - Song, Weimin
A1  - Huang, Baoshan
A1  - Shu, Xiang
A1  - Wu, Hao
A1  - Gong, Hongren
A1  - Han, Bingye
A1  - Zou, Jinfeng
SP  - 299
EP  - 307
VL  - 2673
IS  - 5
N2  - The damping properties of railway ballast are critical to the safe operation of trains. This study aimed to improve the damping properties of railway ballast through the addition of tire-derived aggregate (TDA) and to evaluate the effect of TDA on other properties of ballast. The damping property and other mechanical properties of ballast mixed with different contents of TDA were tested utilizing a large direct shear test (DST) under static and cyclic loading conditions. The cyclic loading test was performed in accordance with ASTM D 7499, from which the resilient interface shear stiffness and damping ratio were obtained. The results showed that TDA significantly increased the damping ratio of railway ballast, but decreased the resilient interface shear stiffness. The stress-strain behavior of the ballast-TDA mixes was obtained from the static loading test, showing that TDA significantly decreased the peak shear stress and the dilation effect. According to the Mohr-Coulomb failure criterion, TDA also decreased the cohesion strength and the internal friction angle of the ballast. Based on the test results from this study, 5% rubber is recommended for use in railway ballast.<p />  <p>Language: en</p>
LA  - en
SN  - 0361-1981
UR  - http://dx.doi.org/10.1177/0361198119839345
ID  - ref1
ER  -