Performance Research and Life Prediction of Polyurethane Foam Synthetic Sleepers in Service
Domestic polyurethane foam synthetic sleepers have been used online for more than 15 years.In order to evaluate the use status and product performance of synthetic sleepers after years of service,and provide data support for subsequent operation,maintenance,promotion,application and life prediction,representative synthetic sleepers were selected for comprehensive performance research,and the apparent state,microstructure,chemical structure,physical properties,mechanical properties,fatigue properties,etc.of synthetic sleepers with different service life were tested and analyzed.The results show that the synthetic sleepers that have been used online for 15 years are in good condition,the microstructure and chemical structure of the products are stable,and the physical and mechanical properties are basically equivalent to those of the new sleepers,without obvious attenuation,and still could meet the requirements of CJ/T 399-2012 Synthetic Sleepers of Fiber Reinforced Polyurethane Foam.Research has shown that synthetic rail sleepers have good weather resistance and fatigue resistance,with an expected service life of over 30 years.
万方数据
维普
