Development of Prediction Technology for Corrosion Damage Risk of Infrastructures H. Katayama Research Center for Structural Materials, National Institute for Materials Science (NIMS) 60PP33--0055 PP33--0066 Many infrastructures were intensively constructed in Japan during the period of rapid economic growth, and in recent years, the damage and deterioration due to aging have become apparent. In order to ensure safe and continuous use in the future, it is expected that huge investments will have to be made in the repair and reconstruction of these infrastructures. As the countermeasure, it is important to equalize the maintenance costs by shifting from reactive maintenance to preventive maintenance. In this research, we are focusing on infrastructure corrosion as one of the factors causing damage and developing two technologies. One is a corrosion damage risk prediction technology from meteorological and environmental data to identify in advance which infrastructures need to be repaired or reinforced, and the other is a simple inspection and evaluation technology for efficient diagnosis using hyperspectral cameras. The prediction map of corrosion damage risk can determine the priorities of repair and reinforcement for each infrastructure and can greatly contribute to leveling the maintenance cost. In addition, further advancement of hyperspectral analysis technology is expected to realize a simple and highly quantitative inspection technology for corrosion damage. Durable Biomass/Polypropylene Composites for Improving Sustainability in Structures J. Tanks 1, K. Tamura 2 and K. Naito 1,3 1 Research Center for Structural Materials, National Institute for Materials Science (NIMS) 2 Research Center for Electronic and Optical Materials, National Institute for Materials Science (NIMS) 3 Department of Aerospace Engineering, Tohoku University Lightweight plastics and their composites are being increasingly used in automobiles to reduce emissions and costs, but the market demand for fossil fuel-based plastics such as polypropylene (PP) creates several environmental problems such as pollution and waste. Although replacing PP with biomass such as lignin is not a new endeavor, the vast majority of past studies reported reduced mechanical properties as lignin content increases, which limits its application in industry. Herein, blends of PP and glycol-modified softwood-derived lignin biomass (GL) are successfully fabricated via a melt-mixing approach, which boast exceptional mechanical properties and thermal stability. Furthermore, GL protects the polymer from degradation by UV irradiation, leading to robust in-service performance and post-service recyclability. Synergistic performance enhancement is observed when combined with carbon fiber reinforcement, which is elucidated by nanoindentation of the fiber/polymer interface. This work contributes to the development of sustainable automotive structures by efficiently combining biomass and traditional materials. Poster Presentation ｜NIMS Award Symposium 2023 P3 ｜ Evaluation
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