A method is proposed for producing composite solutions using ash as a production waste, as a structuring additive to composite solutions. The chemical and mineral composition of ash is determined. Structuring in composite solutions was studied when cement was replaced by different amounts of ash. It is established that the possibility of a 20% replacement of cement with ash without loss of the technological parameters of the system. The environmental safety of the composite solution using ash modifier has been proved by determining phytotoxicity on seedlings of radish seed Raphanus sativus.

A method for producing composite solutions using ash from the burning of fuel oil as a waste product is presented. The chemical and mineral composition of the ash is determined. The structure formation in composite solutions was studied when replacing cement with various amounts of ash. The possibility of a 40 % replacement of cement with ash without loss of technological parameters of the system has been established. The environmental safety of the composite solution using the ash modifier has been proved by determining phytotoxicity on seedlings of Raphanus sativus radish seeds.

The distribution of heavy metals in soils in the sorting station of Lublino-Sortirovochnoye Kursk direction of the Moscow railway in the southeastern district of Moscow with the help of sampling profiles is considered. Analysis of the distribution of metals in the northern, southern parks, the central line of the station and along the main course is given. The characteristic groups of metals that determine the nature and level of contamination of the station, as well as a number of predominant heavy metals are presented. Their distribution at three stations stopping at a distance from the main course is considered. The categories of soil contamination and the contribution of each metal are determined taking into account the halos of the dispersion of enterprises. A comparison of the soil of the sorting station with the level of contamination of the strip for the removal of segments of the railway lines of the Kursk and Kazan directions is given. Recommendations are given for reducing the content and distribution of heavy metals in urban areas.

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