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<p>In order to reduce the high temperature stress in the interior of the longitudinal structure ballastless track slab under extreme high temperature, a macroporous structured TiO<sub>2</sub>-based reflective thermal insulation material was developed based on the grafting modification of inorganic thermal functional materials. By analyzing the effect of the macroporous structured TiO<sub>2</sub>-based reflective thermal insulation material on the temperature and stress of the longitudinal ballastless track slab, it is found that the thermal insulation performance of the double-layer gray system is obviously better than that of the single-layer gray system. The coating of the macroporous structured TiO<sub>2</sub>-based reflective thermal insulation material significantly reduces the temperature of the track surface and the interior, and the stress of the track slab is significantly reduced by 0.42&#xa0;MPa. Significantly reduce the longitudinal stress and vertical displacement of the longitudinal ballastless track structure.</p>

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Macroporous Structured TiO2-Based Reflective Thermal Insulation Coating with Extreme High-Temperature Resistance on Ballastless Track Slabs of High-Speed EUMs

  • 期刊论文

  • 发表日期：

    2026年3月6日

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  • Xin Wang,
  • Wenjing Tu,
  • Yu Ding,
  • Jingcun Zhao,
  • Yingbin Zhuang,
  • Chenchen Mao,
  • Chao Guo,
  • Jie Feng,
  • Yin Zhang,
  • Jian Xu,
  • Mingjie Chen,
  • Xiaofei Xing

摘要

In order to reduce the high temperature stress in the interior of the longitudinal structure ballastless track slab under extreme high temperature, a macroporous structured TiO2-based reflective thermal insulation material was developed based on the grafting modification of inorganic thermal functional materials. By analyzing the effect of the macroporous structured TiO2-based reflective thermal insulation material on the temperature and stress of the longitudinal ballastless track slab, it is found that the thermal insulation performance of the double-layer gray system is obviously better than that of the single-layer gray system. The coating of the macroporous structured TiO2-based reflective thermal insulation material significantly reduces the temperature of the track surface and the interior, and the stress of the track slab is significantly reduced by 0.42 MPa. Significantly reduce the longitudinal stress and vertical displacement of the longitudinal ballastless track structure.