After pilot projects for the Belgian and French railways, we have now also been selected by the Dutch railway company NS to install sleepers made of sulphurous concrete in a ‘testing ground’, so that they too can ascertain the solidity of this circular material. Last summer, 168 sleepers were easily installed on a railway line in the Zwolle region. They will now be monitored intensively. More: https://www.prorail.nl/nieuws/prorail-test-duurzame-dwarsliggers