Recently, the deterioration and renovation of the aged bridges are urgent issue. Approximately 30% of more than 700,000 highway and road bridges in Japan have been in service for more than 50 years. The performance and function of them are required equal to be better than those at the beginning of construction and extend the service life. In addition to above, Japan is also a highly seismic country and there have been frequent damages of the bridges due to earthquakes. Therefore, securing the resilience of the bridges corresponding to robustness, redundancy, resourcefulness and rapidity is strongly demanded. In this study, the current status and practical countermeasures for the bridges to ensure the required performance and function, and to enhance the resilience using concrete polymer materials were investigated and discussed. Concrete polymer materials, which have high strength, high early strength development and high durability, are effective for repair and strengthening to sustain the current performance of structures. The main construction contents are as follows;

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Recent Application of Concrete Polymer Materials for Highway Bridges in Japan

  • Makoto Kawakami,
  • Katsunori Demura,
  • Mikio Wakasugi,
  • Fujio Omata,
  • Shinya Satoh

摘要

Recently, the deterioration and renovation of the aged bridges are urgent issue. Approximately 30% of more than 700,000 highway and road bridges in Japan have been in service for more than 50 years. The performance and function of them are required equal to be better than those at the beginning of construction and extend the service life. In addition to above, Japan is also a highly seismic country and there have been frequent damages of the bridges due to earthquakes. Therefore, securing the resilience of the bridges corresponding to robustness, redundancy, resourcefulness and rapidity is strongly demanded. In this study, the current status and practical countermeasures for the bridges to ensure the required performance and function, and to enhance the resilience using concrete polymer materials were investigated and discussed. Concrete polymer materials, which have high strength, high early strength development and high durability, are effective for repair and strengthening to sustain the current performance of structures. The main construction contents are as follows;