Recycling of grounds for the construction of the railway subgrade

The relevance of the issue of construction waste management is considered on the example of soil during the construction of the railway track. The main requirements for the soils of the subgrade, as one of the components of the railway track, ensuring the safety of rolling stock movement, are listed. Definitions of construction waste and recycling are given; classification of waste generated during the dismantling and repair of railway track facilities in accordance with regulatory documents. The advantages, the main task of recycling, as well as the main reasons that exclude this method in solving the problem of getting rid of construction waste are indicated. The main pollutants of the soil, which is removed during the repair of the railway track, have been identified. The methods of utilization of soils for the construction of the railway subgrade containing petroleum and organic inclusions are considered. The main methods of extracting petroleum products, depending on the degree of contamination and terrain conditions, taking into account efficiency and environmental safety: physico-chemical method, cutting out the top layer of soil, washing with high-pressure water jets and pumping out pulp, microbiological cleaning, washing using drainage systems, capillary absorption of porous materials and others. Peat processing methods: production of pellets, pyrolysis, hydrolysis.