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Concrete sleepers are used on the railway track to build the superstructure, i.e. to mount the rails on the sleepers by means of fastenings. Concrete sleepers take over the dynamic loads from the rail and transmit them to the track prism. Due to the demands to which they are subjected during operation, due to the efforts exerted by the rolling stock in circulation, as well as due to the climatic conditions of operation, concrete sleepers wear out, no longer being able to ensure a firm fastening of the rails, with negative effects regarding the track gauge. Failure to ensure a firm fastening of the rails may lead to serious disruptions of the track superstructure. To avoid causing disruptions, it is necessary to replace, in isolated or staged fashion (row-by-row), concrete sleepers of different types that have worn out, with some new ones. The permanent operation of railway lines is ensured by maintaining the component parts of the running track and their geometric condition parameters within the permitted tolerances provided in the CFR (Romanian Railways) instructions and service standards. Due to the advanced degree of deterioration of the physical and condition parameters,…

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