Volumetric mix-design modification and vibration attenuation analysis of rubberised epoxy asphalt track for railway

Road Materials and Pavement Design, vol. 26, pp. 1890–1913

Abstract

Rubberized asphalt mixture effectively reduces vibrations in railway track due to the elasticity of crumb rubber (CR) and the viscoelasticity of asphalt binder. This study aims to design a rubberized epoxy asphalt mixture using the modified volumetric mix-design method named the multi-point supported skeleton for asphalt mixtures (V-S method). The feasibility and vibration attenuation of the precast epoxy asphalt track was evaluated through a 3D FEM simulation at a 350 km/h speed. By combining the V-S method with the equivalent volume replacement principle between CR and coarse aggregate, four types of rubberized epoxy asphalt mixtures were proposed using the dry method. Indoor test results confirm that these mixtures meet the required specifications. The FEM results demonstrate that the designed epoxy asphalt track meets the design criteria and the components of the EA-4CR track structure demonstrate superior vibration reduction performance among the cases with the same increment in CR content.

Authors 7

1. Shi Chenguang Aachen Institute of Geomechanics and Underground Technology

   Chongqing Jiaotong University · Southeast University · RWTH Aachen University

   Affiliation as printed

   Chongqing Jiaotong University

   RWTH Aachen University

   Southeast University

   Institute of Geomechanics and Underground Technology, RWTH Aachen University, Aachen, Germany

   National & Local Joint Engineering Research Center of Transportation and Civil Engineering Materials, Chongqing Jiaotong University, Chonqing, People's Republic of China

   School of Civil Engineering, Chongqing Jiaotong University, Chongqin, People's Republic of China

   School of Transportation, Southeast University, Nanjing, People's Republic of China

2. You Ping Wu

   Delft University of Technology

   Affiliation as printed

   Delft University of Technology

   Section of Railway Engineering, Delft University of Technology, Delft, the Netherlands

3. Raúl Fuentes Aachen Institute of Geomechanics and Underground Technology

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University

   Institute of Geomechanics and Underground Technology, RWTH Aachen University, Aachen, Germany

4. Yulou Fan

   Southeast University

   Affiliation as printed

   Southeast University

   School of Transportation, Southeast University, Nanjing, People's Republic of China

5. Yixin Zhou

   Southeast University

   Affiliation as printed

   Southeast University

   School of Transportation, Southeast University, Nanjing, People's Republic of China

6. Chaoliang Fu Aachen Institute of Highway Engineering

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University

   Institute of Highway Engineering (ISAC), RWTH Aachen University, Aachen, Germany

7. Jun Yang corresponding

   Southeast University

   Affiliation as printed

   Southeast University

   School of Transportation, Southeast University, Nanjing, People's Republic of China