Evaluation of epoxy asphalt-based concrete substructure for high-speed railway ballastless track

•Three epoxy asphalt-based concretes (EACs) were designed and evaluated.•Epoxy asphalt-based concrete substructure (EAC-S) was proposed for the high-speed railway ballastless track and evaluated.•The EACs could improve the cracking resistance and deformability of substructure.•The EAC-S has better c...

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Bibliographic Details
Published in:Construction & building materials 2018-02, Vol.162, p.229-238
Main Authors: Liu, Yang, Qian, Zhen-dong, Zheng, Dong, Huang, Qi-bo
Format: Article
Language:English
Subjects:
Analysis
Asphalt concrete
Asphalt concrete railway substructure
Epoxy asphalt-based concrete
High-speed railway ballastless track
Material performance
Mechanical properties
Structural performance
Thermal properties
Thermoplastics
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Summary:•Three epoxy asphalt-based concretes (EACs) were designed and evaluated.•Epoxy asphalt-based concrete substructure (EAC-S) was proposed for the high-speed railway ballastless track and evaluated.•The EACs could improve the cracking resistance and deformability of substructure.•The EAC-S has better capacity in vibration attenuation than the conventional substructure. In order to improve the serviceability and service life of high-speed railway ballastless track, the epoxy asphalt-based concrete railway substructure (EAC-S) is proposed. Three epoxy asphalt-based concretes (EACs), containing the conventional epoxy asphalt concrete (CEAC), the rubber powder modified epoxy asphalt concrete (REAC), and the thermoplastic matrix asphalt modified epoxy asphalt concrete (MEAC), were designed at first. Afterwards, the material performance of the EACs was evaluated by a series of laboratory experiments. Finally, a finite element model was developed to investigate the structural performance of EAC-S. Results show that all the three EACs are suitable for the high-speed railway substructure, and the EACs could improve the cracking resistance and deformability of substructure. The designed EAC-S has better capacity in vibration attenuation than the conventional substructure, and could improve the stress and deformation behavior of the subgrade bed.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2017.12.028