차열 도료의 철도 영업 선로 적용을 위한 손상 영향 인자 기초 연구

초록

Railroad rails are the passageways on which railroad vehicles travel, and are parts of an important infrastructure directly related to the safety of railroad operation. However, thermal expansion caused by rises in rail temperature in summer increases the risk of derailment accidents, and no fundamental solution to this problem has been presented. To solve this problem, research on application of thermal insulation paint to rails has been recently conducted, and the optimum coating thickness has been suggested. However, to apply thermal insulation paint to actual commercial track, it is required to evaluate the performance impact of the thermal insulation paint in consideration of the railway operating environment characteristics. In this study, the effect on thermal insulation performance when paint had suffered surface contamination, identified as a performance degradation factor in previous studies, was evaluated. In addition, the effect was evaluated even when the surface of the heat insulation paint was damaged due to scattering of gravel. Through a specimen test, changes in thermal insulation performance were quantitatively evaluated in cases of surface contamination and surface damage of thermal insulation paints; the results are expected to be utilized as basic data for application of thermal insulation paints to railroad rails in the future.

키워드