TY - JOUR
T1 - Stiffness and damping ratio of rubber-modified asphalt mixes
T2 - Potential vibration attenuation for high-speed railway trackbeds
AU - Zeng, X.
AU - Rose, J. G.
AU - Rice, J. S.
PY - 2001/5
Y1 - 2001/5
N2 - This paper presents the first phase laboratory test results of a research project at the University of Kentucky. A number of resonant column tests were conducted to measure the stiffness and damping ratio of rubber-modified asphalt (RMA) samples with different rubber contents and mixed by different methods. The measurements were conducted under a wide range of confining pressures and shear strains to simulate the stress conditions that would be expected in a typical railway foundation. Data from the tests show that RMA has stiffness much higher than compacted soils while providing significantly higher damping ratio than most soils under the same strain level. Therefore, the results from this study indicate that RMA has great potential as a foundation material for high-speed railway trackbeds.
AB - This paper presents the first phase laboratory test results of a research project at the University of Kentucky. A number of resonant column tests were conducted to measure the stiffness and damping ratio of rubber-modified asphalt (RMA) samples with different rubber contents and mixed by different methods. The measurements were conducted under a wide range of confining pressures and shear strains to simulate the stress conditions that would be expected in a typical railway foundation. Data from the tests show that RMA has stiffness much higher than compacted soils while providing significantly higher damping ratio than most soils under the same strain level. Therefore, the results from this study indicate that RMA has great potential as a foundation material for high-speed railway trackbeds.
KW - Damping
KW - Railway
KW - Robber-modified asphalt (RMA)
KW - Stiffness
KW - Trackbeds
KW - Vibration attenuation
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U2 - 10.1177/107754630100700403
DO - 10.1177/107754630100700403
M3 - Article
AN - SCOPUS:0035340972
SN - 1077-5463
VL - 7
SP - 527
EP - 538
JO - JVC/Journal of Vibration and Control
JF - JVC/Journal of Vibration and Control
IS - 4
ER -