A novel application of thermoplastic polyurethane/waste rubber powder blend for waterproof seal layer in high-speed railway

The moisture induced damage is considered a serious threat to the durability of the high-speed railway system. In this paper, an innovative application of thermoplastic polyurethane/waste rubber powder blend (TPU/WRP) with higher elastic modulus was introduced to enhance the water resistance of high-speed railway structure as a waterproof seal layer. The thermoplastic polyurethane has been proved to have excellent mechanical and waterproof properties, and waste rubber has the advantages in cost and sustainability. The objective of this study was to design the TPU/WRP material and evaluate its moisture resistance and mechanical properties. The compressive test was used to determine the elastic modulus and the permeability test was conducted to verify waterproof performance. Further, the finite element method (FEM) was applied to analyze its mechanical responses under both dynamic and static conditions. The results indicated that TPU/WRP had excellent properties for the field utilization of transferring stress, resistance to tensile fracture, supporting the superstructure, and hence is a suitable functional waterproof material for preventing subbase and subgrade layers from moisture damage in heavy load traffic environment such as high-speed railway.


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  • Accession Number: 01762579
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 23 2020 3:08PM