Development of polymer concrete third rail insulators for use in the UK

This paper deals with polymer concrete, a highly-filled, low-cost composite material developed in the USA to be a versatile alternative to porcelain insulation, for a wide variety of applications. Specifically, the development of polymer concrete third rail insulators for use in the UK environment is discussed. The advantages of polymer concrete over existing systems are outlined and the feasibility of developing more integral and efficient third rail insulators, minimizing system assembly, and thereby cost, is examined. The acceptability and potential of polymer concrete insulation systems for rail transport applications world-wide are briefly touched upon.